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The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":1356646,"source":{"system":"sec-edgar","filing":"0001193125-26-091468","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1794546/000119312526091468/ownership.xml","form_type":"4"}},{"id":860473,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":62744,"kind":"person","name":"Cordonnier Michael","position":1,"cik":"0002077087","reported_name":"Cordonnier Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO, President"}}],"security":"Common Stock","published_at":"2026-03-04T21:05:03.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":true,"shares":197855,"price":0.335,"value":66281.425,"ownership":{"direct":true},"balance_after":1554501,"source":{"system":"sec-edgar","filing":"0001193125-26-091468","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1794546/000119312526091468/ownership.xml","form_type":"4"}},{"id":926671,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":68361,"kind":"person","name":"Casey Niall","position":1,"cik":"0002077161","reported_name":"Casey Niall","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief IP Officer"}}],"security":"Common Stock","published_at":"2026-01-30T22:23:14.000Z","date":"2026-01-28","kind":"grant","planned":false,"acquired":true,"shares":44977,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one (1) share of the Issuer's Common Stock. The RSUs will vest in three equal annual installments beginning on the first anniversary of the grant date."}],"balance_after":982562,"source":{"system":"sec-edgar","filing":"0001193125-26-032073","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1794546/000119312526032073/ownership.xml","form_type":"4"}},{"id":926670,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":62744,"kind":"person","name":"Cordonnier Michael","position":1,"cik":"0002077087","reported_name":"Cordonnier Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO, President"}}],"security":"Common Stock","published_at":"2026-01-30T22:22:02.000Z","date":"2026-01-28","kind":"grant","planned":false,"acquired":true,"shares":117316,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one (1) share of the Issuer's Common Stock. The RSUs will vest in three equal annual installments beginning on the first anniversary of the grant date."}],"balance_after":1356646,"source":{"system":"sec-edgar","filing":"0001193125-26-032071","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1794546/000119312526032071/ownership.xml","form_type":"4"}},{"id":927093,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":68396,"kind":"person","name":"Durall William Scott","position":1,"cik":"0001818744","reported_name":"Durall William Scott","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Commercial Officer"}}],"security":"Common Stock","published_at":"2026-01-30T17:24:27.000Z","date":"2026-01-28","kind":"grant","planned":false,"acquired":true,"shares":44977,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one (1) share of the Issuer's Common Stock. The RSUs will vest in three equal annual installments beginning on the first anniversary of the grant date."}],"balance_after":44977,"source":{"system":"sec-edgar","filing":"0001193125-26-032076","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818744/000119312526032076/ownership.xml","form_type":"4"}},{"id":926783,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":68372,"kind":"person","name":"Greenstein Leonard M.","position":1,"cik":"0001519692","reported_name":"Greenstein Leonard M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO, Treasurer"}}],"security":"Common Stock","published_at":"2026-01-30T17:20:15.000Z","date":"2026-01-28","kind":"grant","planned":false,"acquired":true,"shares":44977,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one (1) share of the Issuer's Common Stock. The RSUs will vest in three equal annual installments beginning on the first anniversary of the grant date."}],"balance_after":188346,"source":{"system":"sec-edgar","filing":"0001193125-26-032069","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1519692/000119312526032069/ownership.xml","form_type":"4"}},{"id":1082203,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Preferred Series C Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":1117743,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Stock held by USVP SFI, on its own behalf and as nominee for USVP SFI-A."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1117743},"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082202,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Preferred Series C Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":26993,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Stock Held by USVP XII-A."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":26993},"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082201,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Preferred Stock Series B","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":41876,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Stock Held by USVP XII-A."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":41876},"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082200,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Preferred Series A Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":149655,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Stock Held by USVP XII-A."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":149655},"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082199,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Preferred Series C Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":531877,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Stock held by U.S. Venture Partners XII, L.P. (\"USVP XII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":531877},"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082198,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Preferred Series B Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":825135,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Stock held by U.S. Venture Partners XII, L.P. (\"USVP XII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":825135},"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082197,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Preferred Series A Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":2948794,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Stock held by U.S. Venture Partners XII, L.P. (\"USVP XII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":2948794},"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082196,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":1117743,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Stock held by USVP SFI, on its own behalf and as nominee for USVP SFI-A."}],"balance_after":1117743,"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082195,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":26993,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Stock Held by USVP XII-A."}],"balance_after":218524,"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082194,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":41876,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Stock Held by USVP XII-A."}],"balance_after":191531,"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082193,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":149655,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Stock Held by USVP XII-A."}],"balance_after":149655,"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082192,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":531877,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Stock held by U.S. Venture Partners XII, L.P. (\"USVP XII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."}],"balance_after":4305806,"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082191,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":825135,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Stock held by U.S. Venture Partners XII, L.P. (\"USVP XII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."}],"balance_after":3773929,"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1082190,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":47690,"kind":"organization","name":"Presidio Management Group XII, L.L.C.","position":1,"cik":"0001734820","reported_name":"Presidio Management Group XII, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":49117,"kind":"organization","name":"U.S. Venture Partners XII, L.P.","position":2,"cik":"0001734819","reported_name":"U.S. Venture Partners XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21218,"kind":"person","name":"Tansey Casey M","position":3,"cik":"0001474322","reported_name":"Tansey Casey M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:47:16.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":2948794,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These shares of preferred stock are reported after giving effect to the 1-for-5.58 reverse split of the Issuer's common and preferred stock effected on July 10, 2025 (the \"Reverse Split\"). Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock is convertible into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering. These shares are reported in Table II above on an as-converted 1-to-1 basis with no additional consideration and have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Stock held by U.S. Venture Partners XII, L.P. (\"USVP XII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\", and together with USVP XII, the \"USVP XII Funds\"). Presidio Management Group Select Fund I, L.L.C (\"PMG SFI\", and, together with USVP XII, USVP XII-A, U.S. Venture Partners Select Fund I, L.P. (\"USVP SFI\"), U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\"), and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. PMG XII and PMG SFI may be deemed to share voting and dispositive power over the stock held by USVP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Jonathan D. Root, Richard W. Lewis, Dafina Toncheva and Steven M. Krausz, are managing members of PMG XII, who may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds. In addition, Casey M. Tansey is the managing partner of PMG XII and may be deemed to share voting and dispositive power over the reported securities held by the USVP XII Funds.  Each such persons and entities disclaim beneficial ownership of the reported securities held by the USVP XII Funds, except to the extent of any pecuniary interest therein."}],"balance_after":2948794,"source":{"system":"sec-edgar","filing":"0001415889-25-020276","document":"form4-07252025_120712.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1734820/000141588925020276/form4-07252025_120712.xml","form_type":"4"}},{"id":1081818,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":62744,"kind":"person","name":"Cordonnier Michael","position":1,"cik":"0002077087","reported_name":"Cordonnier Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO, President"}}],"security":"Series B Preferred Stock","published_at":"2025-07-25T00:33:12.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":3612,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":3612},"source":{"system":"sec-edgar","filing":"0000950170-25-098544","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1794546/000095017025098544/ownership.xml","form_type":"4"}},{"id":1081817,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":62744,"kind":"person","name":"Cordonnier Michael","position":1,"cik":"0002077087","reported_name":"Cordonnier Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO, President"}}],"security":"Stock Options (Right to Buy)","published_at":"2025-07-25T00:33:12.000Z","date":"2025-07-22","kind":"grant","planned":false,"acquired":true,"shares":142857,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The unvested stock options are convertible into approximately 142,857 shares of the Issuer's common stock and will begin to vest in equal installments on each quarterly anniversary of July 22, 2025 (the \"Grant Date\"), such that all of the stock options will be vested on the fourth anniversary of the Grant Date, provided that the Reporting Person remains in continuous service through each applicable vesting date."}],"balance_after":726235,"derivative":{"exercise_price":15,"expiration_date":"2035-07-09","underlying":"Common Stock","underlying_shares":142857},"source":{"system":"sec-edgar","filing":"0000950170-25-098544","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1794546/000095017025098544/ownership.xml","form_type":"4"}},{"id":1081816,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":62744,"kind":"person","name":"Cordonnier Michael","position":1,"cik":"0002077087","reported_name":"Cordonnier Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO, President"}}],"security":"Common Stock","published_at":"2025-07-25T00:33:12.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":3612,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."}],"balance_after":1239330,"source":{"system":"sec-edgar","filing":"0000950170-25-098544","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1794546/000095017025098544/ownership.xml","form_type":"4"}},{"id":1082023,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":36316,"kind":"person","name":"Sidow Kevin","position":1,"cik":"0001416947","reported_name":"Sidow Kevin","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series B Preferred Stock","published_at":"2025-07-25T00:32:18.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":28900,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":28900},"source":{"system":"sec-edgar","filing":"0000950170-25-098542","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1416947/000095017025098542/ownership.xml","form_type":"4"}},{"id":1082022,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":36316,"kind":"person","name":"Sidow Kevin","position":1,"cik":"0001416947","reported_name":"Sidow Kevin","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:32:18.000Z","date":"2025-07-24","kind":"purchase","planned":false,"acquired":true,"shares":13333,"price":15,"value":199995.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"Includes 13,333 shares of the Issuer's common stock purchased by the Reporting Person in the Issuer's initial public offering at the public offering price of $15.00 per share. The purchase was made directly from the underwriters in connection with the offering."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Includes (i) 17,333 unvested RSUs convertible into approximately 17,333 shares of the Issuer's common stock, (ii) 28,900 shares of common stock issued to Reporting Person upon the conversion of outstanding preferred stock on a 1-to-1 basis, immediately prior to the closing of the Issuer's public offering, and (iii) 13,333 shares of the Issuer's common stock purchased by the Reporting Person in the Issuer's initial public offering at the public offering price of $15.00 per share."}],"balance_after":59566,"source":{"system":"sec-edgar","filing":"0000950170-25-098542","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1416947/000095017025098542/ownership.xml","form_type":"4"}},{"id":1082021,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":36316,"kind":"person","name":"Sidow Kevin","position":1,"cik":"0001416947","reported_name":"Sidow Kevin","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:32:18.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":28900,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."}],"balance_after":28900,"source":{"system":"sec-edgar","filing":"0000950170-25-098542","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1416947/000095017025098542/ownership.xml","form_type":"4"}},{"id":1082020,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":36316,"kind":"person","name":"Sidow Kevin","position":1,"cik":"0001416947","reported_name":"Sidow Kevin","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:32:18.000Z","date":"2025-07-22","kind":"grant","planned":false,"acquired":true,"shares":17333,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Constitute an award of restricted stock units (\"RSUs\") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. The RSUs will vest in equal annual installments over three years."},{"field":"shares","element":"transactionShares","label":"F2","text":"Includes 17,333 unvested restricted stock units convertible into approximately 17,333 shares of the Issuer's common stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 17,333 unvested restricted stock units convertible into approximately 17,333 shares of the Issuer's common stock."}],"balance_after":17333,"source":{"system":"sec-edgar","filing":"0000950170-25-098542","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1416947/000095017025098542/ownership.xml","form_type":"4"}},{"id":1082000,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":36286,"kind":"person","name":"OBOYLE KEVIN C","position":1,"cik":"0001203567","reported_name":"OBOYLE KEVIN C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:29:54.000Z","date":"2025-07-22","kind":"grant","planned":false,"acquired":true,"shares":17333,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Constitute an award of restricted stock units (\"RSUs\") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. The RSUs will vest in equal annual installments over three years."},{"field":"shares","element":"transactionShares","label":"F2","text":"Includes 17,333 unvested restricted stock units convertible into approximately 17,333 shares of the Issuer's common stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 17,333 unvested restricted stock units convertible into approximately 17,333 shares of the Issuer's common stock."}],"balance_after":17333,"source":{"system":"sec-edgar","filing":"0000950170-25-098533","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1203567/000095017025098533/ownership.xml","form_type":"4"}},{"id":1081815,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":68361,"kind":"person","name":"Casey Niall","position":1,"cik":"0002077161","reported_name":"Casey Niall","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief IP Officer, Secretary"}}],"security":"Series B Preferred Stock","published_at":"2025-07-25T00:28:47.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":3612,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":3612},"source":{"system":"sec-edgar","filing":"0000950170-25-098530","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1794546/000095017025098530/ownership.xml","form_type":"4"}},{"id":1081814,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":68361,"kind":"person","name":"Casey Niall","position":1,"cik":"0002077161","reported_name":"Casey Niall","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief IP Officer, Secretary"}}],"security":"Stock Options (Right to Buy)","published_at":"2025-07-25T00:28:47.000Z","date":"2025-07-22","kind":"grant","planned":false,"acquired":true,"shares":53571,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The unvested stock options are convertible into approximately 53,571 shares of the Issuer's common stock and will begin to vest in equal installments on each quarterly anniversary of July 22, 2025 (the \"Grant Date\"), such that all of the stock options will be vested on the fourth anniversary of the Grant Date, provided that the Reporting Person remains in continuous service through each applicable vesting date."}],"balance_after":166049,"derivative":{"exercise_price":15,"expiration_date":"2035-07-09","underlying":"Common Stock","underlying_shares":53571},"source":{"system":"sec-edgar","filing":"0000950170-25-098530","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1794546/000095017025098530/ownership.xml","form_type":"4"}},{"id":1081813,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":68361,"kind":"person","name":"Casey Niall","position":1,"cik":"0002077161","reported_name":"Casey Niall","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief IP Officer, Secretary"}}],"security":"Common Stock","published_at":"2025-07-25T00:28:47.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":3612,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."}],"balance_after":937585,"source":{"system":"sec-edgar","filing":"0000950170-25-098530","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1794546/000095017025098530/ownership.xml","form_type":"4"}},{"id":1081993,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series C Preferred Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":1117743,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Stock held by U.S. Venture Partners Select Fund I, L.P., (\"USVP SFI\") on its own behalf and as nominee for U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1117743},"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081992,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series C Preferred Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":26993,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Stock held by U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":26993},"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081991,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series B Preferred Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":41876,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Stock held by U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":41876},"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081990,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A Preferred Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":149655,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Stock held by U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":149655},"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081989,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series C Preferred Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":531877,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Stock held by U.S. Venture Partners XII, L.P. (\"USVP XII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":531877},"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081988,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series B Preferred Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":825135,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Stock held by U.S. Venture Partners XII, L.P. (\"USVP XII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":825135},"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081987,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A Preferred Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":2948794,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Stock held by U.S. Venture Partners XII, L.P. (\"USVP XII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":2948794},"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081986,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"purchase","planned":false,"acquired":true,"shares":466666,"price":15,"value":6999990.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F8","text":"Includes 466,666 shares of the Issuer's common stock purchased by the Reporting Person in the Issuer's initial public offering at the public offering price of $15.00 per share. The purchase was made directly from the underwriters in connection with the offering."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F9","text":"Includes (i) 466,666 shares of the Issuer's common stock purchased by the reporting person in the Issuer's initial public offering at the public offering price of $15.00 per share, and (ii) 17,333 unvested RSUs convertible into approximately 17,333 shares of the Issuer's common stock. The RSUs will vest in equal annual installments over three years."}],"balance_after":483999,"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081985,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":1117743,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Stock held by U.S. Venture Partners Select Fund I, L.P., (\"USVP SFI\") on its own behalf and as nominee for U.S. Venture Partners Select Fund I-A, L.P. (\"USVP SFI-A\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":1117743,"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081984,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":26993,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Stock held by U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":218524,"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081983,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":41876,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Stock held by U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":191531,"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081982,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":149655,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Stock held by U.S. Venture Partners XII-A, L.P. (\"USVP XII-A\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":149655,"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081981,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":531877,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Stock held by U.S. Venture Partners XII, L.P. (\"USVP XII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":4305806,"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081980,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":825135,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Stock held by U.S. Venture Partners XII, L.P. (\"USVP XII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":3773929,"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081979,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":2948794,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Stock held by U.S. Venture Partners XII, L.P. (\"USVP XII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Presidio Management Group XII, L.L.C (\"PMG XII\") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C (\"PMG SFI,\" and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, \"USVP\") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":2948794,"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1081978,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":29762,"kind":"person","name":"ROOT JONATHAN D","position":1,"cik":"0001225480","reported_name":"ROOT JONATHAN D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:27:10.000Z","date":"2025-07-22","kind":"grant","planned":false,"acquired":true,"shares":17333,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Constitute an award of restricted stock units (\"RSUs\") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. The RSUs will vest in equal annual installments over three years."},{"field":"shares","element":"transactionShares","label":"F2","text":"Includes 17,333 unvested restricted stock units convertible into approximately 17,333 shares of the Issuer's common stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Constitute an award of restricted stock units (\"RSUs\") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. The RSUs will vest in equal annual installments over three years."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 17,333 unvested restricted stock units convertible into approximately 17,333 shares of the Issuer's common stock."}],"balance_after":17333,"source":{"system":"sec-edgar","filing":"0000950170-25-098529","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1225480/000095017025098529/ownership.xml","form_type":"4"}},{"id":1082347,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":36490,"kind":"person","name":"YOUNG PHILIP M","position":1,"cik":"0001048637","reported_name":"YOUNG PHILIP M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series B Preferred Stock","published_at":"2025-07-25T00:25:31.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":28900,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Stock held by PMY Partners LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Reporting Person is the sole general partner of PMY Partners L.P. and has voting and dispositive power over the stock held by PMY Partners L.P."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":28900},"source":{"system":"sec-edgar","filing":"0000950170-25-098528","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1048637/000095017025098528/ownership.xml","form_type":"4"}},{"id":1082346,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":36490,"kind":"person","name":"YOUNG PHILIP M","position":1,"cik":"0001048637","reported_name":"YOUNG PHILIP M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:25:31.000Z","date":"2025-07-24","kind":"purchase","planned":false,"acquired":true,"shares":53333,"price":15,"value":799995.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F8","text":"Includes 53,333 shares of the Issuer's common stock purchased by the Young Family Trust dtd 04/13/1998 Nancy Halsey Young & Philip Young, Trustees (the \"Trust\") in the Issuer's initial public offering at the public offering price of $15.00 per share. The purchase was made directly from the underwriters in connection with the offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Stock held by the Trust."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"Reporting Person is a trustee of the Trust and has voting and dispositive power over the stock held by the Trust."}],"balance_after":53333,"source":{"system":"sec-edgar","filing":"0000950170-25-098528","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1048637/000095017025098528/ownership.xml","form_type":"4"}},{"id":1082345,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":36490,"kind":"person","name":"YOUNG PHILIP M","position":1,"cik":"0001048637","reported_name":"YOUNG PHILIP M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:25:31.000Z","date":"2025-07-24","kind":"purchase","planned":false,"acquired":true,"shares":6666,"price":15,"value":99990.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F6","text":"Includes 6,666 shares of the Issuer's common stock purchased by PMY Partners L.P. in the Issuer's initial public offering at the public offering price of $15.00 per share. The purchase was made directly from the underwriters in connection with the offering."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"(7)\tIncludes (i) 6,666 shares of the Issuer's common stock purchased by PMY Partners L.P. in the Issuer's initial public offering at the public offering price of $15.00 per share, and (ii) 28,900 shares of common stock issued to PMY Partners L.P. upon the conversion of outstanding preferred stock on a 1-to-1 basis, immediately prior to the closing of the Issuer's public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Stock held by PMY Partners LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Reporting Person is the sole general partner of PMY Partners L.P. and has voting and dispositive power over the stock held by PMY Partners L.P."}],"balance_after":35566,"source":{"system":"sec-edgar","filing":"0000950170-25-098528","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1048637/000095017025098528/ownership.xml","form_type":"4"}},{"id":1082344,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":36490,"kind":"person","name":"YOUNG PHILIP M","position":1,"cik":"0001048637","reported_name":"YOUNG PHILIP M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:25:31.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":28900,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Stock held by PMY Partners LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Reporting Person is the sole general partner of PMY Partners L.P. and has voting and dispositive power over the stock held by PMY Partners L.P."}],"balance_after":28900,"source":{"system":"sec-edgar","filing":"0000950170-25-098528","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1048637/000095017025098528/ownership.xml","form_type":"4"}},{"id":1082343,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":36490,"kind":"person","name":"YOUNG PHILIP M","position":1,"cik":"0001048637","reported_name":"YOUNG PHILIP M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-25T00:25:31.000Z","date":"2025-07-22","kind":"grant","planned":false,"acquired":true,"shares":17333,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Constitute an award of restricted stock units (\"RSUs\") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. The RSUs will vest in equal annual installments over three years."},{"field":"shares","element":"transactionShares","label":"F2","text":"Includes 17,333 unvested restricted stock units convertible into approximately 17,333 shares of the Issuer's common stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Constitute an award of restricted stock units (\"RSUs\") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. The RSUs will vest in equal annual installments over three years."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 17,333 unvested restricted stock units convertible into approximately 17,333 shares of the Issuer's common stock."}],"balance_after":17333,"source":{"system":"sec-edgar","filing":"0000950170-25-098528","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1048637/000095017025098528/ownership.xml","form_type":"4"}},{"id":1082271,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77265,"kind":"organization","name":"B CAPITAL GROUP MANAGEMENT, L.P.","position":1,"cik":"0001997306","reported_name":"B CAPITAL GROUP MANAGEMENT, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77266,"kind":"organization","name":"B Capital Global Growth III, L.P.","position":2,"cik":"0001911138","reported_name":"B Capital Global Growth III, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77267,"kind":"organization","name":"B Capital Healthcare I, L.P.","position":3,"cik":"0001875322","reported_name":"B Capital Healthcare I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77268,"kind":"organization","name":"Hornet Co-Invest Investors, Ltd.","position":4,"cik":"0002077425","reported_name":"Hornet Co-Invest Investors, Ltd.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77269,"kind":"organization","name":"Hornet Co-Invest, LP","position":5,"cik":"0002077424","reported_name":"Hornet Co-Invest, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Preferred Stock","published_at":"2025-07-24T20:51:14.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":931452,"ownership":{"direct":false,"nature":"By Hornet Co-Invest, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by Hornet Co-Invest, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III, L.P. and B Capital Healthcare I, L.P. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest, L.P. (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any. This report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":931452},"source":{"system":"sec-edgar","filing":"0000950170-25-098549","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1997306/000095017025098549/ownership.xml","form_type":"4"}},{"id":1082270,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77265,"kind":"organization","name":"B CAPITAL GROUP MANAGEMENT, L.P.","position":1,"cik":"0001997306","reported_name":"B CAPITAL GROUP MANAGEMENT, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77266,"kind":"organization","name":"B Capital Global Growth III, L.P.","position":2,"cik":"0001911138","reported_name":"B Capital Global Growth III, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77267,"kind":"organization","name":"B Capital Healthcare I, L.P.","position":3,"cik":"0001875322","reported_name":"B Capital Healthcare I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77268,"kind":"organization","name":"Hornet Co-Invest Investors, Ltd.","position":4,"cik":"0002077425","reported_name":"Hornet Co-Invest Investors, Ltd.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77269,"kind":"organization","name":"Hornet Co-Invest, LP","position":5,"cik":"0002077424","reported_name":"Hornet Co-Invest, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Preferred Stock","published_at":"2025-07-24T20:51:14.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":931452,"ownership":{"direct":false,"nature":"By B Capital Healthcare I, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Shares held by B Capital Healthcare I, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III, L.P. and B Capital Healthcare I, L.P. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest, L.P. (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any. This report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":931452},"source":{"system":"sec-edgar","filing":"0000950170-25-098549","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1997306/000095017025098549/ownership.xml","form_type":"4"}},{"id":1082269,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77265,"kind":"organization","name":"B CAPITAL GROUP MANAGEMENT, L.P.","position":1,"cik":"0001997306","reported_name":"B CAPITAL GROUP MANAGEMENT, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77266,"kind":"organization","name":"B Capital Global Growth III, L.P.","position":2,"cik":"0001911138","reported_name":"B Capital Global Growth III, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77267,"kind":"organization","name":"B Capital Healthcare I, L.P.","position":3,"cik":"0001875322","reported_name":"B Capital Healthcare I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77268,"kind":"organization","name":"Hornet Co-Invest Investors, Ltd.","position":4,"cik":"0002077425","reported_name":"Hornet Co-Invest Investors, Ltd.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77269,"kind":"organization","name":"Hornet Co-Invest, LP","position":5,"cik":"0002077424","reported_name":"Hornet Co-Invest, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Preferred Stock","published_at":"2025-07-24T20:51:14.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":1445020,"ownership":{"direct":false,"nature":"By B Capital Healthcare I, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Shares held by B Capital Healthcare I, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III, L.P. and B Capital Healthcare I, L.P. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest, L.P. (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any. This report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1445020},"source":{"system":"sec-edgar","filing":"0000950170-25-098549","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1997306/000095017025098549/ownership.xml","form_type":"4"}},{"id":1082268,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77265,"kind":"organization","name":"B CAPITAL GROUP MANAGEMENT, L.P.","position":1,"cik":"0001997306","reported_name":"B CAPITAL GROUP MANAGEMENT, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77266,"kind":"organization","name":"B Capital Global Growth III, L.P.","position":2,"cik":"0001911138","reported_name":"B Capital Global Growth III, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77267,"kind":"organization","name":"B Capital Healthcare I, L.P.","position":3,"cik":"0001875322","reported_name":"B Capital Healthcare I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77268,"kind":"organization","name":"Hornet Co-Invest Investors, Ltd.","position":4,"cik":"0002077425","reported_name":"Hornet Co-Invest Investors, Ltd.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77269,"kind":"organization","name":"Hornet Co-Invest, LP","position":5,"cik":"0002077424","reported_name":"Hornet Co-Invest, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Preferred Stock","published_at":"2025-07-24T20:51:14.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":2235486,"ownership":{"direct":false,"nature":"By B Capital Global Growth III, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by B Capital Global Growth III, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III, L.P. and B Capital Healthcare I, L.P. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest, L.P. (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any. This report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":2235486},"source":{"system":"sec-edgar","filing":"0000950170-25-098549","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1997306/000095017025098549/ownership.xml","form_type":"4"}},{"id":1082267,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77265,"kind":"organization","name":"B CAPITAL GROUP MANAGEMENT, L.P.","position":1,"cik":"0001997306","reported_name":"B CAPITAL GROUP MANAGEMENT, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77266,"kind":"organization","name":"B Capital Global Growth III, L.P.","position":2,"cik":"0001911138","reported_name":"B Capital Global Growth III, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77267,"kind":"organization","name":"B Capital Healthcare I, L.P.","position":3,"cik":"0001875322","reported_name":"B Capital Healthcare I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77268,"kind":"organization","name":"Hornet Co-Invest Investors, Ltd.","position":4,"cik":"0002077425","reported_name":"Hornet Co-Invest Investors, Ltd.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77269,"kind":"organization","name":"Hornet Co-Invest, LP","position":5,"cik":"0002077424","reported_name":"Hornet Co-Invest, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Preferred Stock","published_at":"2025-07-24T20:51:14.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":1445020,"ownership":{"direct":false,"nature":"By B Capital Global Growth III, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by B Capital Global Growth III, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III, L.P. and B Capital Healthcare I, L.P. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest, L.P. (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any. This report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1445020},"source":{"system":"sec-edgar","filing":"0000950170-25-098549","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1997306/000095017025098549/ownership.xml","form_type":"4"}},{"id":1082266,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77265,"kind":"organization","name":"B CAPITAL GROUP MANAGEMENT, L.P.","position":1,"cik":"0001997306","reported_name":"B CAPITAL GROUP MANAGEMENT, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77266,"kind":"organization","name":"B Capital Global Growth III, L.P.","position":2,"cik":"0001911138","reported_name":"B Capital Global Growth III, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77267,"kind":"organization","name":"B Capital Healthcare I, L.P.","position":3,"cik":"0001875322","reported_name":"B Capital Healthcare I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77268,"kind":"organization","name":"Hornet Co-Invest Investors, Ltd.","position":4,"cik":"0002077425","reported_name":"Hornet Co-Invest Investors, Ltd.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77269,"kind":"organization","name":"Hornet Co-Invest, LP","position":5,"cik":"0002077424","reported_name":"Hornet Co-Invest, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-07-24T20:51:14.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":931452,"ownership":{"direct":false,"nature":"By Hornet Co-Invest, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by Hornet Co-Invest, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III, L.P. and B Capital Healthcare I, L.P. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest, L.P. (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any. This report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose."}],"balance_after":931452,"source":{"system":"sec-edgar","filing":"0000950170-25-098549","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1997306/000095017025098549/ownership.xml","form_type":"4"}},{"id":1082265,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77265,"kind":"organization","name":"B CAPITAL GROUP MANAGEMENT, L.P.","position":1,"cik":"0001997306","reported_name":"B CAPITAL GROUP MANAGEMENT, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77266,"kind":"organization","name":"B Capital Global Growth III, L.P.","position":2,"cik":"0001911138","reported_name":"B Capital Global Growth III, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77267,"kind":"organization","name":"B Capital Healthcare I, L.P.","position":3,"cik":"0001875322","reported_name":"B Capital Healthcare I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77268,"kind":"organization","name":"Hornet Co-Invest Investors, Ltd.","position":4,"cik":"0002077425","reported_name":"Hornet Co-Invest Investors, Ltd.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77269,"kind":"organization","name":"Hornet Co-Invest, LP","position":5,"cik":"0002077424","reported_name":"Hornet Co-Invest, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-07-24T20:51:14.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":2376472,"ownership":{"direct":false,"nature":"By B Capital Healthcare I, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Shares held by B Capital Healthcare I, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III, L.P. and B Capital Healthcare I, L.P. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest, L.P. (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any. This report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose."}],"balance_after":2376472,"source":{"system":"sec-edgar","filing":"0000950170-25-098549","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1997306/000095017025098549/ownership.xml","form_type":"4"}},{"id":1082264,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77265,"kind":"organization","name":"B CAPITAL GROUP MANAGEMENT, L.P.","position":1,"cik":"0001997306","reported_name":"B CAPITAL GROUP MANAGEMENT, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77266,"kind":"organization","name":"B Capital Global Growth III, L.P.","position":2,"cik":"0001911138","reported_name":"B Capital Global Growth III, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77267,"kind":"organization","name":"B Capital Healthcare I, L.P.","position":3,"cik":"0001875322","reported_name":"B Capital Healthcare I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77268,"kind":"organization","name":"Hornet Co-Invest Investors, Ltd.","position":4,"cik":"0002077425","reported_name":"Hornet Co-Invest Investors, Ltd.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77269,"kind":"organization","name":"Hornet Co-Invest, LP","position":5,"cik":"0002077424","reported_name":"Hornet Co-Invest, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-07-24T20:51:14.000Z","date":"2025-07-24","kind":"purchase","planned":false,"acquired":true,"shares":1333333,"price":15,"value":19999995.0,"ownership":{"direct":false,"nature":"By B Capital Global Growth III, L.P."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by B Capital Global Growth III, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III, L.P. and B Capital Healthcare I, L.P. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest, L.P. (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any. This report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose."}],"balance_after":5013839,"source":{"system":"sec-edgar","filing":"0000950170-25-098549","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1997306/000095017025098549/ownership.xml","form_type":"4"}},{"id":1082263,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77265,"kind":"organization","name":"B CAPITAL GROUP MANAGEMENT, L.P.","position":1,"cik":"0001997306","reported_name":"B CAPITAL GROUP MANAGEMENT, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77266,"kind":"organization","name":"B Capital Global Growth III, L.P.","position":2,"cik":"0001911138","reported_name":"B Capital Global Growth III, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77267,"kind":"organization","name":"B Capital Healthcare I, L.P.","position":3,"cik":"0001875322","reported_name":"B Capital Healthcare I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77268,"kind":"organization","name":"Hornet Co-Invest Investors, Ltd.","position":4,"cik":"0002077425","reported_name":"Hornet Co-Invest Investors, Ltd.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":77269,"kind":"organization","name":"Hornet Co-Invest, LP","position":5,"cik":"0002077424","reported_name":"Hornet Co-Invest, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-07-24T20:51:14.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":3680506,"ownership":{"direct":false,"nature":"By B Capital Global Growth III, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by B Capital Global Growth III, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III, L.P. and B Capital Healthcare I, L.P. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest, L.P. (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any. This report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose."}],"balance_after":3680506,"source":{"system":"sec-edgar","filing":"0000950170-25-098549","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997306/000095017025098549/ownership.xml","form_type":"4"}},{"id":1082228,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":68396,"kind":"person","name":"Durall William Scott","position":1,"cik":"0001818744","reported_name":"Durall William Scott","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Commercial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2025-07-24T20:34:46.000Z","date":"2025-07-22","kind":"grant","planned":false,"acquired":true,"shares":71429,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The unvested stock options are convertible into approximately 71,429 shares of the Issuer's common stock and will begin to vest in equal installments on each quarterly anniversary of July 22, 2025 (the \"Grant Date\"), such that all of the stock options will be vested on the fourth anniversary of the Grant Date, provided that the Reporting Person remains in continuous service through each applicable vesting date."}],"balance_after":296008,"derivative":{"exercise_price":15,"expiration_date":"2035-07-09","underlying":"Common Stock","underlying_shares":71429},"source":{"system":"sec-edgar","filing":"0000950170-25-098545","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818744/000095017025098545/ownership.xml","form_type":"4"}},{"id":1082048,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77256,"kind":"person","name":"Mittendorff Robert II","position":1,"cik":"0001476171","reported_name":"Mittendorff Robert II","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series C Preferred Stock","published_at":"2025-07-24T20:31:12.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":931452,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by Hornet Co-Invest, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III and B Capital Healthcare I. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). The Reporting Person is a general partner of B Capital Group Management, LP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":931452},"source":{"system":"sec-edgar","filing":"0000950170-25-098540","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1476171/000095017025098540/ownership.xml","form_type":"4"}},{"id":1082047,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77256,"kind":"person","name":"Mittendorff Robert II","position":1,"cik":"0001476171","reported_name":"Mittendorff Robert II","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series C Preferred Stock","published_at":"2025-07-24T20:31:12.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":931452,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Shares held by B Capital Healthcare I, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III and B Capital Healthcare I. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). The Reporting Person is a general partner of B Capital Group Management, LP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":931452},"source":{"system":"sec-edgar","filing":"0000950170-25-098540","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1476171/000095017025098540/ownership.xml","form_type":"4"}},{"id":1082046,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77256,"kind":"person","name":"Mittendorff Robert II","position":1,"cik":"0001476171","reported_name":"Mittendorff Robert II","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series B Preferred Stock","published_at":"2025-07-24T20:31:12.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":1445020,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Shares held by B Capital Healthcare I, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III and B Capital Healthcare I. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). The Reporting Person is a general partner of B Capital Group Management, LP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1445020},"source":{"system":"sec-edgar","filing":"0000950170-25-098540","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1476171/000095017025098540/ownership.xml","form_type":"4"}},{"id":1082045,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77256,"kind":"person","name":"Mittendorff Robert II","position":1,"cik":"0001476171","reported_name":"Mittendorff Robert II","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series C Preferred Stock","published_at":"2025-07-24T20:31:12.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":2235486,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by B Capital Global Growth III, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III and B Capital Healthcare I. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). The Reporting Person is a general partner of B Capital Group Management, LP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":2235486},"source":{"system":"sec-edgar","filing":"0000950170-25-098540","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1476171/000095017025098540/ownership.xml","form_type":"4"}},{"id":1082044,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77256,"kind":"person","name":"Mittendorff Robert II","position":1,"cik":"0001476171","reported_name":"Mittendorff Robert II","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series B Preferred Stock","published_at":"2025-07-24T20:31:12.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":1445020,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by B Capital Global Growth III, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III and B Capital Healthcare I. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). The Reporting Person is a general partner of B Capital Group Management, LP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1445020},"source":{"system":"sec-edgar","filing":"0000950170-25-098540","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1476171/000095017025098540/ownership.xml","form_type":"4"}},{"id":1082043,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77256,"kind":"person","name":"Mittendorff Robert II","position":1,"cik":"0001476171","reported_name":"Mittendorff Robert II","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-24T20:31:12.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":931452,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by Hornet Co-Invest, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III and B Capital Healthcare I. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). The Reporting Person is a general partner of B Capital Group Management, LP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":931452,"source":{"system":"sec-edgar","filing":"0000950170-25-098540","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1476171/000095017025098540/ownership.xml","form_type":"4"}},{"id":1082042,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77256,"kind":"person","name":"Mittendorff Robert II","position":1,"cik":"0001476171","reported_name":"Mittendorff Robert II","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-24T20:31:12.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":2376472,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Shares held by B Capital Healthcare I, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III and B Capital Healthcare I. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). The Reporting Person is a general partner of B Capital Group Management, LP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":2376472,"source":{"system":"sec-edgar","filing":"0000950170-25-098540","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1476171/000095017025098540/ownership.xml","form_type":"4"}},{"id":1082041,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77256,"kind":"person","name":"Mittendorff Robert II","position":1,"cik":"0001476171","reported_name":"Mittendorff Robert II","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-24T20:31:12.000Z","date":"2025-07-24","kind":"purchase","planned":false,"acquired":true,"shares":1333333,"price":15,"value":19999995.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by B Capital Global Growth III, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III and B Capital Healthcare I. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). The Reporting Person is a general partner of B Capital Group Management, LP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":5013839,"source":{"system":"sec-edgar","filing":"0000950170-25-098540","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1476171/000095017025098540/ownership.xml","form_type":"4"}},{"id":1082040,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":77256,"kind":"person","name":"Mittendorff Robert II","position":1,"cik":"0001476171","reported_name":"Mittendorff Robert II","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-24T20:31:12.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":3680506,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering without payment of additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by B Capital Global Growth III, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"B Capital Group Management, LP is the manager of B Capital Global Growth III and B Capital Healthcare I. Hornet-Co-Invest Investors, Ltd. is the ultimate general partner of Hornet Co-Invest (Hornet Co-Invest, L.P., together with B Capital Healthcare I, L.P., and B Capital Global Growth III, L.P., \"B Capital\"). The Reporting Person is a general partner of B Capital Group Management, LP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein."}],"balance_after":3680506,"source":{"system":"sec-edgar","filing":"0000950170-25-098540","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1476171/000095017025098540/ownership.xml","form_type":"4"}},{"id":1081887,"issuer":{"id":5551,"kind":"organization","name":"CARLSMED, INC.","symbol":"CARL"},"owners":[{"id":68372,"kind":"person","name":"Greenstein Leonard M.","position":1,"cik":"0001519692","reported_name":"Greenstein Leonard M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO, Treasurer"}}],"security":"Stock Options (Right to Buy)","published_at":"2025-07-24T20:29:28.000Z","date":"2025-07-22","kind":"grant","planned":false,"acquired":true,"shares":71429,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The unvested stock options are convertible into approximately 71,429 shares of the Issuer's common stock and will begin to vest in equal installments on each quarterly anniversary of July 22, 2025 (the \"Grant Date\"), such that all of the stock options will be vested on the fourth anniversary of the Grant Date, provided that the Reporting Person remains in continuous service through each applicable vesting date."}],"balance_after":155102,"derivative":{"exercise_price":15,"expiration_date":"2035-07-09","underlying":"Common Stock","underlying_shares":71429},"source":{"system":"sec-edgar","filing":"0000950170-25-098531","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1519692/000095017025098531/ownership.xml","form_type":"4"}}]}