{"transactions":[{"id":730416,"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":"2026-06-22T10:11:27.000Z","date":"2026-06-03","kind":"grant","planned":false,"acquired":true,"shares":13698,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Constitutes 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 full on the earlier of (i) the day before the Issuer's 2027 annual meeting of stockholders or (ii) June 3, 2027, subject, in all cases, to the Reporting Person's continued service as a member of the Board of Directors through such vesting date."}],"balance_after":73264,"source":{"system":"sec-edgar","filing":"0001193125-26-276628","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1416947/000119312526276628/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"}}]}