{"transactions":[{"id":4639558,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-10-13T20:48:22.000Z","date":"2026-10-13","kind":"sale","planned":true,"acquired":false,"shares":1000,"price":9.13,"value":9130.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person and assumed by Clear Street LLC, providing for the sale of shares of the Issuer's Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share. Sales under the plan were permitted to begin on October 1, 2026, and the plan expires on October 1, 2028, unless terminated earlier."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were sold in multiple transactions at prices ranging from $9.12 to $9.29 on October 9, 2026, $9.12 to $9.29 on October 12, 2026, and $9.11 to $9.17 on October 13, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price such shares were sold."}],"balance_after":756937,"source":{"system":"sec-edgar","filing":"0001548312-26-000049","document":"wk-form4_1791924499.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1548312/000154831226000049/wk-form4_1791924499.xml","form_type":"4"}},{"id":4639557,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-10-13T20:48:22.000Z","date":"2026-10-12","kind":"sale","planned":true,"acquired":false,"shares":1000,"price":9.13,"value":9130.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person and assumed by Clear Street LLC, providing for the sale of shares of the Issuer's Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share. Sales under the plan were permitted to begin on October 1, 2026, and the plan expires on October 1, 2028, unless terminated earlier."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were sold in multiple transactions at prices ranging from $9.12 to $9.29 on October 9, 2026, $9.12 to $9.29 on October 12, 2026, and $9.11 to $9.17 on October 13, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price such shares were sold."}],"balance_after":757937,"source":{"system":"sec-edgar","filing":"0001548312-26-000049","document":"wk-form4_1791924499.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1548312/000154831226000049/wk-form4_1791924499.xml","form_type":"4"}},{"id":4639556,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-10-13T20:48:22.000Z","date":"2026-10-09","kind":"sale","planned":true,"acquired":false,"shares":1000,"price":9.14,"value":9140.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person and assumed by Clear Street LLC, providing for the sale of shares of the Issuer's Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share. Sales under the plan were permitted to begin on October 1, 2026, and the plan expires on October 1, 2028, unless terminated earlier."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were sold in multiple transactions at prices ranging from $9.12 to $9.29 on October 9, 2026, $9.12 to $9.29 on October 12, 2026, and $9.11 to $9.17 on October 13, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price such shares were sold."}],"balance_after":758937,"source":{"system":"sec-edgar","filing":"0001548312-26-000049","document":"wk-form4_1791924499.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1548312/000154831226000049/wk-form4_1791924499.xml","form_type":"4"}},{"id":4638108,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-10-08T21:52:07.000Z","date":"2026-10-08","kind":"sale","planned":true,"acquired":false,"shares":1000,"price":9.17,"value":9170.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person and assumed by Clear Street LLC, providing for the sale of shares of the Issuer's Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share. Sales under the plan were permitted to begin on October 1, 2026, and the plan expires on October 1, 2028, unless terminated earlier."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were sold in multiple transactions at prices ranging from $9.16 to $9.22 on October 6, 2026, $9.16 to $9.23 on October 7, 2026, and $9.16 to $9.21 on October 8, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price such shares were sold."}],"balance_after":759937,"source":{"system":"sec-edgar","filing":"0001548312-26-000047","document":"wk-form4_1791496325.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1548312/000154831226000047/wk-form4_1791496325.xml","form_type":"4"}},{"id":4638107,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-10-08T21:52:07.000Z","date":"2026-10-07","kind":"sale","planned":true,"acquired":false,"shares":1000,"price":9.17,"value":9170.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person and assumed by Clear Street LLC, providing for the sale of shares of the Issuer's Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share. Sales under the plan were permitted to begin on October 1, 2026, and the plan expires on October 1, 2028, unless terminated earlier."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were sold in multiple transactions at prices ranging from $9.16 to $9.22 on October 6, 2026, $9.16 to $9.23 on October 7, 2026, and $9.16 to $9.21 on October 8, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price such shares were sold."}],"balance_after":760937,"source":{"system":"sec-edgar","filing":"0001548312-26-000047","document":"wk-form4_1791496325.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1548312/000154831226000047/wk-form4_1791496325.xml","form_type":"4"}},{"id":4638106,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-10-08T21:52:07.000Z","date":"2026-10-06","kind":"sale","planned":true,"acquired":false,"shares":1000,"price":9.2,"value":9200.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person and assumed by Clear Street LLC, providing for the sale of shares of the Issuer's Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share. Sales under the plan were permitted to begin on October 1, 2026, and the plan expires on October 1, 2028, unless terminated earlier."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were sold in multiple transactions at prices ranging from $9.16 to $9.22 on October 6, 2026, $9.16 to $9.23 on October 7, 2026, and $9.16 to $9.21 on October 8, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price such shares were sold."}],"balance_after":761937,"source":{"system":"sec-edgar","filing":"0001548312-26-000047","document":"wk-form4_1791496325.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1548312/000154831226000047/wk-form4_1791496325.xml","form_type":"4"}},{"id":4630934,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-10-05T21:31:01.000Z","date":"2026-10-05","kind":"sale","planned":true,"acquired":false,"shares":1000,"price":9.21,"value":9210.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person and assumed by Clear Street LLC, providing for the sale of shares of the Issuer's Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share. Sales under the plan were permitted to begin on October 1, 2026, and the plan expires on October 1, 2028, unless terminated earlier."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were sold in multiple transactions at prices ranging from $9.13 to $9.31 on October 1, 2026, $9.22 to $9.31 on October 2, 2026, and $9.17 to $9.23 on October 5, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price such shares were sold."}],"balance_after":762937,"source":{"system":"sec-edgar","filing":"0001548312-26-000045","document":"wk-form4_1791235858.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1548312/000154831226000045/wk-form4_1791235858.xml","form_type":"4"}},{"id":4630933,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-10-05T21:31:01.000Z","date":"2026-10-02","kind":"sale","planned":true,"acquired":false,"shares":1000,"price":9.25,"value":9250.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person and assumed by Clear Street LLC, providing for the sale of shares of the Issuer's Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share. Sales under the plan were permitted to begin on October 1, 2026, and the plan expires on October 1, 2028, unless terminated earlier."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were sold in multiple transactions at prices ranging from $9.13 to $9.31 on October 1, 2026, $9.22 to $9.31 on October 2, 2026, and $9.17 to $9.23 on October 5, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price such shares were sold."}],"balance_after":763937,"source":{"system":"sec-edgar","filing":"0001548312-26-000045","document":"wk-form4_1791235858.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1548312/000154831226000045/wk-form4_1791235858.xml","form_type":"4"}},{"id":4630932,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-10-05T21:31:01.000Z","date":"2026-10-01","kind":"sale","planned":true,"acquired":false,"shares":1000,"price":9.22,"value":9220.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person and assumed by Clear Street LLC, providing for the sale of shares of the Issuer's Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share. Sales under the plan were permitted to begin on October 1, 2026, and the plan expires on October 1, 2028, unless terminated earlier."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were sold in multiple transactions at prices ranging from $9.13 to $9.31 on October 1, 2026, $9.22 to $9.31 on October 2, 2026, and $9.17 to $9.23 on October 5, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price such shares were sold."}],"balance_after":764937,"source":{"system":"sec-edgar","filing":"0001548312-26-000045","document":"wk-form4_1791235858.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1548312/000154831226000045/wk-form4_1791235858.xml","form_type":"4"}},{"id":681748,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-08-19T22:07:57.000Z","date":"2026-08-18","kind":"exercise","planned":false,"acquired":false,"shares":535,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On August 18, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 535 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on August 18, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On August 18, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 535 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on August 18, 2026."}],"balance_after":0,"derivative":{"underlying":"Series A Preferred Stock","underlying_shares":535},"source":{"system":"sec-edgar","filing":"0002029470-26-000014","document":"wk-form4_1787177275.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000014/wk-form4_1787177275.xml","form_type":"4"}},{"id":681747,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A Preferred Stock","published_at":"2026-08-19T22:07:57.000Z","date":"2026-08-18","kind":"exercise","planned":false,"acquired":true,"shares":535,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."}],"balance_after":5946,"source":{"system":"sec-edgar","filing":"0002029470-26-000014","document":"wk-form4_1787177275.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000014/wk-form4_1787177275.xml","form_type":"4"}},{"id":681746,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21728,"kind":"person","name":"Parks Louis A.","position":1,"cik":"0002029214","reported_name":"Parks Louis A.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-08-19T22:06:55.000Z","date":"2026-08-18","kind":"exercise","planned":false,"acquired":false,"shares":485,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On August 18, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 485 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on August 18, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On August 18, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 485 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on August 18, 2026."}],"balance_after":0,"derivative":{"underlying":"Series A Preferred Stock","underlying_shares":485},"source":{"system":"sec-edgar","filing":"0002029214-26-000011","document":"wk-form4_1787177212.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2029214/000202921426000011/wk-form4_1787177212.xml","form_type":"4"}},{"id":681745,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21728,"kind":"person","name":"Parks Louis A.","position":1,"cik":"0002029214","reported_name":"Parks Louis A.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A Preferred Stock","published_at":"2026-08-19T22:06:55.000Z","date":"2026-08-18","kind":"exercise","planned":false,"acquired":true,"shares":485,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."}],"balance_after":970,"source":{"system":"sec-edgar","filing":"0002029214-26-000011","document":"wk-form4_1787177212.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029214/000202921426000011/wk-form4_1787177212.xml","form_type":"4"}},{"id":681750,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21730,"kind":"person","name":"Palmer Jennifer","position":1,"cik":"0002029196","reported_name":"Palmer Jennifer","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-08-19T22:05:47.000Z","date":"2026-08-18","kind":"exercise","planned":false,"acquired":false,"shares":460,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On August 18, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 460 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on August 18, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On August 18, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 460 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on August 18, 2026."}],"balance_after":0,"derivative":{"underlying":"Series A Preferred Stock","underlying_shares":460},"source":{"system":"sec-edgar","filing":"0002029196-26-000011","document":"wk-form4_1787177144.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2029196/000202919626000011/wk-form4_1787177144.xml","form_type":"4"}},{"id":681749,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21730,"kind":"person","name":"Palmer Jennifer","position":1,"cik":"0002029196","reported_name":"Palmer Jennifer","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A Preferred Stock","published_at":"2026-08-19T22:05:47.000Z","date":"2026-08-18","kind":"exercise","planned":false,"acquired":true,"shares":460,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."}],"balance_after":920,"source":{"system":"sec-edgar","filing":"0002029196-26-000011","document":"wk-form4_1787177144.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029196/000202919626000011/wk-form4_1787177144.xml","form_type":"4"}},{"id":681143,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-08-19T22:05:24.000Z","date":"2026-08-18","kind":"exercise","planned":false,"acquired":false,"shares":860,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On August 18, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 860 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on August 18, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On August 18, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 860 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on August 18, 2026."}],"balance_after":0,"derivative":{"underlying":"Series A Preferred Stock","underlying_shares":860},"source":{"system":"sec-edgar","filing":"0001548312-26-000043","document":"wk-form4_1787177121.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000043/wk-form4_1787177121.xml","form_type":"4"}},{"id":681142,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-08-19T22:05:24.000Z","date":"2026-08-18","kind":"exercise","planned":false,"acquired":true,"shares":860,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."}],"balance_after":765937,"source":{"system":"sec-edgar","filing":"0001548312-26-000043","document":"wk-form4_1787177121.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000043/wk-form4_1787177121.xml","form_type":"4"}},{"id":699862,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":27472,"kind":"person","name":"Coleman Richard Kenneth Jr.","position":1,"cik":"0001556224","reported_name":"Coleman Richard Kenneth Jr.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-07-31T23:32:03.000Z","date":"2026-03-25","kind":"purchase","planned":false,"acquired":true,"shares":977,"price":9.95,"value":9721.15,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"On March 27, 2026, the Reporting Person filed a Form 4 which  reported that the Reporting Person had purchased 977 shares of Common Stock of the Issuer. In fact, as reported in this amendment, the Reporting Person purchased 977 shares of 10% Series A Cumulative Perpetual Preferred Stock (\"Preferred Stock\") of the Issuer, and not 977 shares of Common Stock. Subsequent Form 4s filed by the Reporting Person will include the corrected amount of Common Stock and Preferred Stock beneficially owned by the Reporting Person."}],"balance_after":8477,"source":{"system":"sec-edgar","filing":"0001556224-26-000006","document":"wk-form4a_1785540721.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000155622426000006/wk-form4a_1785540721.xml","form_type":"4/A","original_submission_date":"2026-03-27"}},{"id":701378,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":27472,"kind":"person","name":"Coleman Richard Kenneth Jr.","position":1,"cik":"0001556224","reported_name":"Coleman Richard Kenneth Jr.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-07-30T00:17:24.000Z","date":"2026-07-27","kind":"exercise","planned":false,"acquired":false,"shares":1161,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On July 27, 2023, the Reporting Person was granted Restricted Stock Units, as to this grant, one-third of the Restricted Stock Units vested on July 27, 2024, one-third of the Restricted Stock Units vested on July 27, 2025, and one-third of the Restricted Stock Units vested on July 27, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On July 27, 2023, the Reporting Person was granted Restricted Stock Units, as to this grant, one-third of the Restricted Stock Units vested on July 27, 2024, one-third of the Restricted Stock Units vested on July 27, 2025, and one-third of the Restricted Stock Units vested on July 27, 2026."}],"balance_after":0,"derivative":{"underlying":"Common Stock.","underlying_shares":1161},"source":{"system":"sec-edgar","filing":"0001556224-26-000004","document":"wk-form4_1785370642.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000155622426000004/wk-form4_1785370642.xml","form_type":"4"}},{"id":701377,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":27472,"kind":"person","name":"Coleman Richard Kenneth Jr.","position":1,"cik":"0001556224","reported_name":"Coleman Richard Kenneth Jr.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2026-07-30T00:17:24.000Z","date":"2026-07-27","kind":"exercise","planned":false,"acquired":true,"shares":1161,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 15,624 shares of common stock and 4,537 shares of RSUs granted to the Reporting Person on November 8, 2024, March 25, 2025, and March 25, 2026. The RSUs are subject to the Reporting Person continuing to provide service through the RSU's applicable vesting date."}],"balance_after":20161,"source":{"system":"sec-edgar","filing":"0001556224-26-000004","document":"wk-form4_1785370642.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000155622426000004/wk-form4_1785370642.xml","form_type":"4"}},{"id":701376,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":28002,"kind":"person","name":"Bible Hannah M.","position":1,"cik":"0001607210","reported_name":"Bible Hannah M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-07-30T00:15:42.000Z","date":"2026-07-27","kind":"exercise","planned":false,"acquired":false,"shares":376,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"On July 27, 2023, the Reporting Person was granted Restricted Stock Units, as to this grant, one-third of the Restricted Stock Units vested on July 27, 2024, one-third of the Restricted Stock Units vested on July 27, 2025, and one-third of the Restricted Stock Units vested on July 27, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"On July 27, 2023, the Reporting Person was granted Restricted Stock Units, as to this grant, one-third of the Restricted Stock Units vested on July 27, 2024, one-third of the Restricted Stock Units vested on July 27, 2025, and one-third of the Restricted Stock Units vested on July 27, 2026."}],"balance_after":0,"derivative":{"underlying":"Common Stock.","underlying_shares":376},"source":{"system":"sec-edgar","filing":"0001607210-26-000004","document":"wk-form4_1785370539.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000160721026000004/wk-form4_1785370539.xml","form_type":"4"}},{"id":701375,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":28002,"kind":"person","name":"Bible Hannah M.","position":1,"cik":"0001607210","reported_name":"Bible Hannah M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Common Stock","published_at":"2026-07-30T00:15:42.000Z","date":"2026-07-27","kind":"tax_withholding","planned":false,"acquired":false,"shares":111,"price":11,"value":1221.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Shares withheld by Issuer to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units. No shares were sold."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes 1,485 shares of common stock and 1,621 shares of RSUs granted to the Reporting Person on November 8, 2024, March 25, 2025, and March 25, 2026. The RSUs are subject to the Reporting Person continuing to provide service through the RSU's applicable vesting date."}],"balance_after":3106,"source":{"system":"sec-edgar","filing":"0001607210-26-000004","document":"wk-form4_1785370539.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000160721026000004/wk-form4_1785370539.xml","form_type":"4"}},{"id":701374,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":28002,"kind":"person","name":"Bible Hannah M.","position":1,"cik":"0001607210","reported_name":"Bible Hannah M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Common Stock","published_at":"2026-07-30T00:15:42.000Z","date":"2026-07-27","kind":"exercise","planned":false,"acquired":true,"shares":376,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."}],"balance_after":3217,"source":{"system":"sec-edgar","filing":"0001607210-26-000004","document":"wk-form4_1785370539.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000160721026000004/wk-form4_1785370539.xml","form_type":"4"}},{"id":701373,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":28001,"kind":"person","name":"Miles Shawn Spain","position":1,"cik":"0001742046","reported_name":"Miles Shawn Spain","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2026-07-30T00:11:15.000Z","date":"2026-07-27","kind":"tax_withholding","planned":false,"acquired":false,"shares":117,"price":11,"value":1287.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Issuer to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units each representing the right to receive, at settlement, one share of common stock (the \"RSUs\"). No shares were sold."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 1,943 shares of common stock and 5,839 shares of RSUs granted to the Reporting Person on November 8, 2024, March 25, 2025, and March 25, 2026. The RSUs are subject to the Reporting Person continuing to provide service through the RSU's applicable vesting date."}],"balance_after":7782,"source":{"system":"sec-edgar","filing":"0001742046-26-000004","document":"wk-form4_1785370273.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000174204626000004/wk-form4_1785370273.xml","form_type":"4"}},{"id":707932,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-07-16T22:12:22.000Z","date":"2026-07-15","kind":"grant","planned":false,"acquired":true,"shares":5388,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Includes 5,388 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Mr. Eberwein has elected to receive fifty percent of his base salary in the form of such restricted stock. Each share of restricted stock shall vest upon the first anniversary of the grant date and represents the right to receive, at settlement, one share of common stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 26,513 shares of restricted stock and (ii) 6,750 RSUs credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated; and (iii) 1,097,839 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1131102,"source":{"system":"sec-edgar","filing":"0001548312-26-000041","document":"wk-form4_1784239938.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000041/wk-form4_1784239938.xml","form_type":"4"}},{"id":723826,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-29T22:22:02.000Z","date":"2026-06-29","kind":"purchase","planned":false,"acquired":true,"shares":5000,"price":11.01,"value":55050.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated; (ii) 6,750 RSUs; and (iii) 1,097,839 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1125714,"source":{"system":"sec-edgar","filing":"0001548312-26-000038","document":"wk-form4_1782771718.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000038/wk-form4_1782771718.xml","form_type":"4"}},{"id":723825,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-29T22:22:02.000Z","date":"2026-06-25","kind":"purchase","planned":false,"acquired":true,"shares":5000,"price":11.01,"value":55050.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated; (ii) 6,750 RSUs; and (iii) 1,092,839 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1120714,"source":{"system":"sec-edgar","filing":"0001548312-26-000038","document":"wk-form4_1782771718.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000038/wk-form4_1782771718.xml","form_type":"4"}},{"id":728741,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-23T21:51:01.000Z","date":"2026-06-22","kind":"purchase","planned":false,"acquired":true,"shares":4766,"price":11.16,"value":53188.56,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated; (ii) 6,750 RSUs; and (iii) 1,087,839 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1115714,"source":{"system":"sec-edgar","filing":"0001548312-26-000035","document":"wk-form4_1782251457.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000035/wk-form4_1782251457.xml","form_type":"4"}},{"id":728740,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-23T21:51:01.000Z","date":"2026-06-18","kind":"purchase","planned":false,"acquired":true,"shares":234,"price":11.01,"value":2576.34,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated; (ii) 6,750 RSUs; and (iii) 1,083,073 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1110948,"source":{"system":"sec-edgar","filing":"0001548312-26-000035","document":"wk-form4_1782251457.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000035/wk-form4_1782251457.xml","form_type":"4"}},{"id":733718,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-17T20:31:36.000Z","date":"2026-06-16","kind":"purchase","planned":false,"acquired":true,"shares":4994,"price":11.21,"value":55982.74,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated; (ii) 6,750 RSUs; and (iii) 1,082,839 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1110714,"source":{"system":"sec-edgar","filing":"0001548312-26-000033","document":"wk-form4_1781728293.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000033/wk-form4_1781728293.xml","form_type":"4"}},{"id":733717,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-17T20:31:36.000Z","date":"2026-06-15","kind":"purchase","planned":false,"acquired":true,"shares":6,"price":11.01,"value":66.06,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated; (ii) 6,750 RSUs; and (iii) 1,077,845 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1105720,"source":{"system":"sec-edgar","filing":"0001548312-26-000033","document":"wk-form4_1781728293.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000033/wk-form4_1781728293.xml","form_type":"4"}},{"id":738080,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-15T20:10:55.000Z","date":"2026-06-12","kind":"purchase","planned":false,"acquired":true,"shares":500,"price":11.23,"value":5615.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes 12,516 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the respective dates of grant of each award of Restricted Stock Units."}],"balance_after":20178,"source":{"system":"sec-edgar","filing":"0002029470-26-000012","document":"wk-form4_1781554252.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000012/wk-form4_1781554252.xml","form_type":"4"}},{"id":737584,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":38094,"kind":"person","name":"Drake Mimi K","position":1,"cik":"0001767481","reported_name":"Drake Mimi K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-15T20:10:03.000Z","date":"2026-06-05","kind":"purchase","planned":false,"acquired":true,"shares":1000,"price":11.65,"value":11650.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes 12,516 Restricted Stock Units and 1,674 deferred shares credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit and deferred share represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the respective dates of grant of each award of Restricted Stock Units."}],"balance_after":44834,"source":{"system":"sec-edgar","filing":"0001767481-26-000004","document":"wk-form4_1781554201.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000176748126000004/wk-form4_1781554201.xml","form_type":"4"}},{"id":740280,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A Preferred Stock","published_at":"2026-06-13T00:57:21.000Z","date":"2026-06-10","kind":"purchase","planned":false,"acquired":true,"shares":300,"price":9.81,"value":2943.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $9.78 to $9.82 on June 10, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."}],"balance_after":5411,"source":{"system":"sec-edgar","filing":"0002029470-26-000010","document":"wk-form4_1781312238.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000010/wk-form4_1781312238.xml","form_type":"4"}},{"id":739449,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-13T00:16:06.000Z","date":"2026-06-10","kind":"purchase","planned":false,"acquired":true,"shares":1884,"price":10.89,"value":20516.76,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $10.88 to $11.01 on June 10, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated; (ii) 6,750 RSUs; and (iii) 1,077,839 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1105714,"source":{"system":"sec-edgar","filing":"0001548312-26-000031","document":"wk-form4_1781309764.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000031/wk-form4_1781309764.xml","form_type":"4"}},{"id":744374,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-09T20:50:20.000Z","date":"2026-06-09","kind":"purchase","planned":false,"acquired":true,"shares":2849,"price":11.23,"value":31994.27,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $11.14 to $11.51 on June 8, 2026 and $11.01 to $11.26 on June 9, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; (ii) 6,750 RSUs; and (iii) 1,075,955 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1103830,"source":{"system":"sec-edgar","filing":"0001548312-26-000029","document":"wk-form4_1781038217.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000029/wk-form4_1781038217.xml","form_type":"4"}},{"id":744373,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-09T20:50:20.000Z","date":"2026-06-08","kind":"purchase","planned":false,"acquired":true,"shares":10000,"price":11.45,"value":114500.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $11.14 to $11.51 on June 8, 2026 and $11.01 to $11.26 on June 9, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; (ii) 6,750 RSUs; and (iii) 1,073,106 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1100981,"source":{"system":"sec-edgar","filing":"0001548312-26-000029","document":"wk-form4_1781038217.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000029/wk-form4_1781038217.xml","form_type":"4"}},{"id":744372,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-09T20:50:20.000Z","date":"2026-06-05","kind":"purchase","planned":false,"acquired":true,"shares":3443,"price":11.51,"value":39628.93,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; (ii) 6,750 RSUs; and (iii) 1,063,106 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1090981,"source":{"system":"sec-edgar","filing":"0001548312-26-000029","document":"wk-form4_1781038217.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000029/wk-form4_1781038217.xml","form_type":"4"}},{"id":744995,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21730,"kind":"person","name":"Palmer Jennifer","position":1,"cik":"0002029196","reported_name":"Palmer Jennifer","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-09T20:13:40.000Z","date":"2026-06-05","kind":"purchase","planned":false,"acquired":true,"shares":686,"price":11.66,"value":7998.76,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $11.55 to $11.66 on June 5, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."}],"balance_after":686,"source":{"system":"sec-edgar","filing":"0002029196-26-000009","document":"wk-form4_1781036018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029196/000202919626000009/wk-form4_1781036018.xml","form_type":"4"}},{"id":744371,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":39991,"kind":"person","name":"Pearse Robert G.","position":1,"cik":"0001580399","reported_name":"Pearse Robert G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-09T20:07:49.000Z","date":"2026-06-05","kind":"purchase","planned":false,"acquired":true,"shares":500,"price":11.46,"value":5730.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $11.32 to $11.50 on June 5, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 12,516 Restricted Stock Units and 1,497 deferred shares credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated.  Each Restricted Stock Unit and deferred share represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the respective dates of grant of each award."}],"balance_after":29218,"source":{"system":"sec-edgar","filing":"0001580399-26-000004","document":"wk-form4_1781035666.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000158039926000004/wk-form4_1781035666.xml","form_type":"4"}},{"id":749375,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-04T21:43:54.000Z","date":"2026-06-04","kind":"purchase","planned":false,"acquired":true,"shares":1430,"price":11.51,"value":16459.3,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; (ii) 6,750 RSUs; and (iii) 1,059,663 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1087538,"source":{"system":"sec-edgar","filing":"0001548312-26-000027","document":"wk-form4_1780609431.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000027/wk-form4_1780609431.xml","form_type":"4"}},{"id":749374,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-04T21:43:54.000Z","date":"2026-06-03","kind":"purchase","planned":false,"acquired":true,"shares":101,"price":11.51,"value":1162.51,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; (ii) 6,750 RSUs; and (iii) 1,058,233 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1086108,"source":{"system":"sec-edgar","filing":"0001548312-26-000027","document":"wk-form4_1780609431.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000027/wk-form4_1780609431.xml","form_type":"4"}},{"id":749373,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-04T21:43:54.000Z","date":"2026-06-02","kind":"purchase","planned":false,"acquired":true,"shares":4881,"price":11.61,"value":56668.41,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $11.41 to $11.61 on June 2, 2026. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; (ii) 6,750 RSUs; and (iii) 1,058,132 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1086007,"source":{"system":"sec-edgar","filing":"0001548312-26-000027","document":"wk-form4_1780609431.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000027/wk-form4_1780609431.xml","form_type":"4"}},{"id":752297,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-03T22:06:42.000Z","date":"2026-06-01","kind":"purchase","planned":false,"acquired":true,"shares":700,"price":11.72,"value":8204.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $11.65 to $11.79, inclusive. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 12,516 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the respective dates of grant of each award of Restricted Stock Units."}],"balance_after":19678,"source":{"system":"sec-edgar","filing":"0002029470-26-000008","document":"wk-form4_1780524399.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000008/wk-form4_1780524399.xml","form_type":"4"}},{"id":755300,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21728,"kind":"person","name":"Parks Louis A.","position":1,"cik":"0002029214","reported_name":"Parks Louis A.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-02T23:00:56.000Z","date":"2026-05-29","kind":"purchase","planned":false,"acquired":true,"shares":1000,"price":11.6,"value":11600.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes 12,516 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the respective dates of grant of each award of Restricted Stock Units."}],"balance_after":15813,"source":{"system":"sec-edgar","filing":"0002029214-26-000009","document":"wk-form4_1780441253.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029214/000202921426000009/wk-form4_1780441253.xml","form_type":"4"}},{"id":756826,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-01T21:46:57.000Z","date":"2026-06-01","kind":"purchase","planned":false,"acquired":true,"shares":1482,"price":11.59,"value":17176.38,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $11.76 to $11.81 on May 28, 2026, $11.42 to $11.61 on May 29, 2026, and $11.40 to $11.61 on June 1, 2026, inclusive. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; (ii) 6,750 RSUs; and (iii) 1,053,251 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1081126,"source":{"system":"sec-edgar","filing":"0001548312-26-000023","document":"wk-form4_1780350414.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000023/wk-form4_1780350414.xml","form_type":"4"}},{"id":756825,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-01T21:46:57.000Z","date":"2026-05-29","kind":"purchase","planned":false,"acquired":true,"shares":3663,"price":11.61,"value":42527.43,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $11.76 to $11.81 on May 28, 2026, $11.42 to $11.61 on May 29, 2026, and $11.40 to $11.61 on June 1, 2026, inclusive. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; (ii) 6,750 RSUs; and (iii) 1,051,769 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1079644,"source":{"system":"sec-edgar","filing":"0001548312-26-000023","document":"wk-form4_1780350414.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000023/wk-form4_1780350414.xml","form_type":"4"}},{"id":756824,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-06-01T21:46:57.000Z","date":"2026-05-28","kind":"purchase","planned":false,"acquired":true,"shares":11201,"price":11.81,"value":132283.81,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $11.76 to $11.81 on May 28, 2026, $11.42 to $11.61 on May 29, 2026, and $11.40 to $11.61 on June 1, 2026, inclusive. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; (ii) 6,750 RSUs; and (iii) 1,048,106 shares of common stock. Excludes 2,000 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1075981,"source":{"system":"sec-edgar","filing":"0001548312-26-000023","document":"wk-form4_1780350414.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000023/wk-form4_1780350414.xml","form_type":"4"}},{"id":756823,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2026-06-01T21:46:57.000Z","date":"2026-05-28","kind":"purchase","planned":false,"acquired":true,"shares":310,"price":11.69,"value":3623.9,"ownership":{"direct":false,"nature":"By Contributory 401k"},"balance_after":810,"source":{"system":"sec-edgar","filing":"0001548312-26-000023","document":"wk-form4_1780350414.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000023/wk-form4_1780350414.xml","form_type":"4"}},{"id":756821,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":42751,"kind":"person","name":"Diamond Matthew K","position":1,"cik":"0001779155","reported_name":"Diamond Matthew K","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Common Stock","published_at":"2026-06-01T20:06:52.000Z","date":"2026-05-29","kind":"tax_withholding","planned":false,"acquired":false,"shares":763,"price":11.62,"value":8866.06,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This number represents shares of Star Equity Holdings, Inc. Common Stock withheld to satisfy the tax withholding obligation due upon vesting of performance-based restricted stock units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 4,813 Share Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan (\"2009 Plan\"); and (ii) 15,362 shares of common stock. Each Share Unit is the economic equivalent of one share of Common Stock. Share Units may be settled pursuant to the 2009 Plan by the issuance of Common Stock, the payment of cash, or a combination of both."}],"balance_after":20175,"source":{"system":"sec-edgar","filing":"0001779155-26-000004","document":"wk-form4_1780344408.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000177915526000004/wk-form4_1780344408.xml","form_type":"4"}},{"id":759979,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":38094,"kind":"person","name":"Drake Mimi K","position":1,"cik":"0001767481","reported_name":"Drake Mimi K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-28T22:37:26.000Z","date":"2026-05-27","kind":"grant","planned":false,"acquired":true,"shares":5504,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Includes 5,504 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the grant date. The number of Restricted Stock Units granted was determined using the closing price on May 27, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 12,516 Restricted Stock Units and 1,674 deferred shares credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated.  Each Restricted Stock Unit and deferred share represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the respective dates of grant of each award of Restricted Stock Units."}],"balance_after":43834,"source":{"system":"sec-edgar","filing":"0001767481-26-000002","document":"wk-form4_1780007844.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000176748126000002/wk-form4_1780007844.xml","form_type":"4"}},{"id":759978,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":39991,"kind":"person","name":"Pearse Robert G.","position":1,"cik":"0001580399","reported_name":"Pearse Robert G.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-28T22:36:40.000Z","date":"2026-05-27","kind":"grant","planned":false,"acquired":true,"shares":5504,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Includes 5,504 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the grant date. The number of Restricted Stock Units granted was determined using the closing price on May 27, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 12,516 Restricted Stock Units and 1,497 deferred shares credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated.  Each Restricted Stock Unit and deferred share represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the respective dates of grant of each award of Restricted Stock Units."}],"balance_after":28718,"source":{"system":"sec-edgar","filing":"0001580399-26-000002","document":"wk-form4_1780007798.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000158039926000002/wk-form4_1780007798.xml","form_type":"4"}},{"id":759977,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":43472,"kind":"person","name":"Nelson Connia M","position":1,"cik":"0001767555","reported_name":"Nelson Connia M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-28T22:35:41.000Z","date":"2026-05-27","kind":"grant","planned":false,"acquired":true,"shares":5504,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Includes 5,504 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the grant date. The number of Restricted Stock Units granted was determined using the closing price on May 27, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 12,516 Restricted Stock Units and 1,130 deferred shares credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated.  Each Restricted Stock Unit and deferred share represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the respective dates of grant of each award of Restricted Stock Units."}],"balance_after":40854,"source":{"system":"sec-edgar","filing":"0001767555-26-000002","document":"wk-form4_1780007738.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000176755526000002/wk-form4_1780007738.xml","form_type":"4"}},{"id":760448,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-28T22:34:46.000Z","date":"2026-05-27","kind":"grant","planned":false,"acquired":true,"shares":5504,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Includes 5,504 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the grant date. The number of Restricted Stock Units granted was determined using the closing price on May 27, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 12,516 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the respective dates of grant of each award of Restricted Stock Units."}],"balance_after":18978,"source":{"system":"sec-edgar","filing":"0002029470-26-000006","document":"wk-form4_1780007684.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000006/wk-form4_1780007684.xml","form_type":"4"}},{"id":760449,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21730,"kind":"person","name":"Palmer Jennifer","position":1,"cik":"0002029196","reported_name":"Palmer Jennifer","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-28T22:33:33.000Z","date":"2026-05-27","kind":"grant","planned":false,"acquired":true,"shares":5504,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Includes 5,504 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the grant date. The number of Restricted Stock Units granted was determined using the closing price on May 27, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 12,516 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the respective dates of grant of each award of Restricted Stock Units."}],"balance_after":13273,"source":{"system":"sec-edgar","filing":"0002029196-26-000007","document":"wk-form4_1780007610.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029196/000202919626000007/wk-form4_1780007610.xml","form_type":"4"}},{"id":760447,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21728,"kind":"person","name":"Parks Louis A.","position":1,"cik":"0002029214","reported_name":"Parks Louis A.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-28T22:29:45.000Z","date":"2026-05-27","kind":"grant","planned":false,"acquired":true,"shares":5504,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Includes 5,504 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the grant date. The number of Restricted Stock Units granted was determined using the closing price on May 27, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 12,516 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock payable upon the first anniversary of the respective dates of grant of each award of Restricted Stock Units."}],"balance_after":14813,"source":{"system":"sec-edgar","filing":"0002029214-26-000007","document":"wk-form4_1780007382.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029214/000202921426000007/wk-form4_1780007382.xml","form_type":"4"}},{"id":761512,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-05-27T22:55:50.000Z","date":"2026-05-27","kind":"purchase","planned":false,"acquired":true,"shares":2288,"price":11.76,"value":26906.88,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $10.90 to $11.26 on May 22, 2026, $11.40 to $11.51 on May 26, 2026, and $11.51 to $11.76 on May 27, 2026, inclusive. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; (ii) 6,750 RSUs; and (iii) 1,036,905 shares of common stock. Excludes 1,690 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1064780,"source":{"system":"sec-edgar","filing":"0001548312-26-000021","document":"wk-form4_1779922548.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000021/wk-form4_1779922548.xml","form_type":"4"}},{"id":761511,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-05-27T22:55:50.000Z","date":"2026-05-26","kind":"purchase","planned":false,"acquired":true,"shares":2414,"price":11.51,"value":27785.14,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $10.90 to $11.26 on May 22, 2026, $11.40 to $11.51 on May 26, 2026, and $11.51 to $11.76 on May 27, 2026, inclusive. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; (ii) 6,750 RSUs; and (iii) 1,036,905 shares of common stock. Excludes 1,690 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1062492,"source":{"system":"sec-edgar","filing":"0001548312-26-000021","document":"wk-form4_1779922548.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000021/wk-form4_1779922548.xml","form_type":"4"}},{"id":761510,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-05-27T22:55:50.000Z","date":"2026-05-22","kind":"purchase","planned":false,"acquired":true,"shares":694,"price":11.06,"value":7675.64,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $10.90 to $11.26 on May 22, 2026, $11.40 to $11.51 on May 26, 2026, and $11.51 to $11.76 on May 27, 2026, inclusive. The Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 21,125 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; (ii) 6,750 RSUs; and (iii) 1,036,905 shares of common stock. Excludes 1,690 shares indirectly owned in contributory 401(k) and IRA accounts. Each share of restricted stock and each RSU represents the right to receive, at settlement, one share of common stock."}],"balance_after":1060078,"source":{"system":"sec-edgar","filing":"0001548312-26-000021","document":"wk-form4_1779922548.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000021/wk-form4_1779922548.xml","form_type":"4"}},{"id":767654,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-05-21T21:55:42.000Z","date":"2026-05-19","kind":"exercise","planned":false,"acquired":false,"shares":860,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On May 19, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 860 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on May 19, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On May 19, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 860 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on May 19, 2026."}],"balance_after":0,"derivative":{"underlying":"Series A Preferred Stock","underlying_shares":860},"source":{"system":"sec-edgar","filing":"0001548312-26-000019","document":"wk-form4_1779400539.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000019/wk-form4_1779400539.xml","form_type":"4"}},{"id":767653,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-05-21T21:55:42.000Z","date":"2026-05-21","kind":"purchase","planned":false,"acquired":true,"shares":4198,"price":10.9,"value":45758.2,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $10.09 to $10.11 on May 19, 2026, $9.78 to $10.33 on May 20, 2026, and $10.82 to $10.96 on May 21, 2026, rounded to the nearest cent, inclusive. the Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."}],"balance_after":1059384,"source":{"system":"sec-edgar","filing":"0001548312-26-000019","document":"wk-form4_1779400539.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000019/wk-form4_1779400539.xml","form_type":"4"}},{"id":767652,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-05-21T21:55:42.000Z","date":"2026-05-20","kind":"purchase","planned":false,"acquired":true,"shares":406,"price":10.18,"value":4133.08,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $10.09 to $10.11 on May 19, 2026, $9.78 to $10.33 on May 20, 2026, and $10.82 to $10.96 on May 21, 2026, rounded to the nearest cent, inclusive. the Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."}],"balance_after":1055186,"source":{"system":"sec-edgar","filing":"0001548312-26-000019","document":"wk-form4_1779400539.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000019/wk-form4_1779400539.xml","form_type":"4"}},{"id":767651,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-05-21T21:55:42.000Z","date":"2026-05-19","kind":"purchase","planned":false,"acquired":true,"shares":13799,"price":10.09,"value":139231.91,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $10.09 to $10.11 on May 19, 2026, $9.78 to $10.33 on May 20, 2026, and $10.82 to $10.96 on May 21, 2026, rounded to the nearest cent, inclusive. the Reporting Person undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased."}],"balance_after":1054780,"source":{"system":"sec-edgar","filing":"0001548312-26-000019","document":"wk-form4_1779400539.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000019/wk-form4_1779400539.xml","form_type":"4"}},{"id":767650,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-05-21T21:55:42.000Z","date":"2026-05-19","kind":"exercise","planned":false,"acquired":true,"shares":860,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."}],"balance_after":765077,"source":{"system":"sec-edgar","filing":"0001548312-26-000019","document":"wk-form4_1779400539.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000019/wk-form4_1779400539.xml","form_type":"4"}},{"id":768297,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-05-21T21:53:06.000Z","date":"2026-05-19","kind":"exercise","planned":false,"acquired":false,"shares":535,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On May 19, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of\nSOC Series A Preferred Stock  (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of\nthe Issuer, the Reporting Person's SOC RSUs were exchanged for 535 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on May 19, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On May 19, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of\nSOC Series A Preferred Stock  (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of\nthe Issuer, the Reporting Person's SOC RSUs were exchanged for 535 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on May 19, 2026."}],"balance_after":0,"derivative":{"underlying":"Series A Preferred Stock","underlying_shares":535},"source":{"system":"sec-edgar","filing":"0002029470-26-000004","document":"wk-form4_1779400384.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000004/wk-form4_1779400384.xml","form_type":"4"}},{"id":768296,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-21T21:53:06.000Z","date":"2026-05-21","kind":"purchase","planned":false,"acquired":true,"shares":400,"price":10.98,"value":4392.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 7,012 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of Common Stock payable upon the first anniversary of the Grant Date."}],"balance_after":13474,"source":{"system":"sec-edgar","filing":"0002029470-26-000004","document":"wk-form4_1779400384.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000004/wk-form4_1779400384.xml","form_type":"4"}},{"id":768295,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-21T21:53:06.000Z","date":"2026-05-20","kind":"purchase","planned":false,"acquired":true,"shares":1,"price":10.25,"value":10.25,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 7,012 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of Common Stock payable upon the first anniversary of the Grant Date."}],"balance_after":13074,"source":{"system":"sec-edgar","filing":"0002029470-26-000004","document":"wk-form4_1779400384.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000004/wk-form4_1779400384.xml","form_type":"4"}},{"id":768294,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A Preferred Stock","published_at":"2026-05-21T21:53:06.000Z","date":"2026-05-19","kind":"exercise","planned":false,"acquired":true,"shares":535,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."}],"balance_after":5111,"source":{"system":"sec-edgar","filing":"0002029470-26-000004","document":"wk-form4_1779400384.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000004/wk-form4_1779400384.xml","form_type":"4"}},{"id":768300,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21730,"kind":"person","name":"Palmer Jennifer","position":1,"cik":"0002029196","reported_name":"Palmer Jennifer","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-05-21T21:45:15.000Z","date":"2026-05-19","kind":"exercise","planned":false,"acquired":false,"shares":460,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On May 19, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 460 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on May 19, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On May 19, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 460 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on May 19, 2026."}],"balance_after":0,"derivative":{"underlying":"Series A Preferred Stock","underlying_shares":460},"source":{"system":"sec-edgar","filing":"0002029196-26-000005","document":"wk-form4_1779399911.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2029196/000202919626000005/wk-form4_1779399911.xml","form_type":"4"}},{"id":768299,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21730,"kind":"person","name":"Palmer Jennifer","position":1,"cik":"0002029196","reported_name":"Palmer Jennifer","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A Preferred Stock","published_at":"2026-05-21T21:45:15.000Z","date":"2026-05-19","kind":"exercise","planned":false,"acquired":true,"shares":460,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."}],"balance_after":460,"source":{"system":"sec-edgar","filing":"0002029196-26-000005","document":"wk-form4_1779399911.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029196/000202919626000005/wk-form4_1779399911.xml","form_type":"4"}},{"id":768293,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21728,"kind":"person","name":"Parks Louis A.","position":1,"cik":"0002029214","reported_name":"Parks Louis A.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-05-21T20:48:45.000Z","date":"2026-05-19","kind":"exercise","planned":false,"acquired":false,"shares":485,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On May 19, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 485 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on May 19, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On May 19, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC Series A Preferred Stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 485 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on May 19, 2026."}],"balance_after":0,"derivative":{"underlying":"Series A Preferred Stock","underlying_shares":485},"source":{"system":"sec-edgar","filing":"0002029214-26-000005","document":"wk-form4_1779396522.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2029214/000202921426000005/wk-form4_1779396522.xml","form_type":"4"}},{"id":768292,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21728,"kind":"person","name":"Parks Louis A.","position":1,"cik":"0002029214","reported_name":"Parks Louis A.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A Preferred Stock","published_at":"2026-05-21T20:48:45.000Z","date":"2026-05-19","kind":"exercise","planned":false,"acquired":true,"shares":485,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of the Issuer's 10.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share (the \"Series A Preferred Stock\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of Series A Preferred Stock on their scheduled vesting date."}],"balance_after":485,"source":{"system":"sec-edgar","filing":"0002029214-26-000005","document":"wk-form4_1779396522.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029214/000202921426000005/wk-form4_1779396522.xml","form_type":"4"}},{"id":806895,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock.","published_at":"2026-04-16T21:20:24.000Z","date":"2026-04-15","kind":"grant","planned":false,"acquired":true,"shares":6504,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Includes 6,504 shares of restricted stock credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Mr. Eberwein has elected to receive fifty percent of his base salary in the form of such restricted stock. Each share of restricted stock shall vest upon the first anniversary of the grant date and represents the right to receive, at settlement, one share of common stock."}],"balance_after":1040981,"source":{"system":"sec-edgar","filing":"0001548312-26-000012","document":"wk-form4_1776374420.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000012/wk-form4_1776374420.xml","form_type":"4"}},{"id":822665,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":54635,"kind":"person","name":"Zabkowicz Jacob","position":1,"cik":"0001995211","reported_name":"Zabkowicz Jacob","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO Hudson Talent SolutionsLLC"}}],"security":"Common Stock.","published_at":"2026-04-01T22:24:09.000Z","date":"2026-03-31","kind":"purchase","planned":false,"acquired":true,"shares":150,"price":10.61,"value":1591.5,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes (i) 135,456 RSUs credited to the Reporting Person's account under the 2009 Plan; and (ii) 45,407 shares of common stock."}],"balance_after":180863,"source":{"system":"sec-edgar","filing":"0001995211-26-000002","document":"wk-form4_1775082247.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000199521126000002/wk-form4_1775082247.xml","form_type":"4"}},{"id":822664,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-04-01T22:23:29.000Z","date":"2026-03-30","kind":"sale","planned":false,"acquired":false,"shares":7722,"price":9.95,"value":76833.9,"ownership":{"direct":true},"balance_after":764217,"source":{"system":"sec-edgar","filing":"0001548312-26-000010","document":"wk-form4_1775082207.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000010/wk-form4_1775082207.xml","form_type":"4"}},{"id":826238,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":27472,"kind":"person","name":"Coleman Richard Kenneth Jr.","position":1,"cik":"0001556224","reported_name":"Coleman Richard Kenneth Jr.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-03-27T22:35:13.000Z","date":"2026-03-25","kind":"exercise","planned":false,"acquired":false,"shares":982,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On March 25, 2025, the Reporting Person was granted 2,946 Restricted Stock Units, as to this grant, one-third of the Restricted Stock Units vested on March 25, 2026, and one-third of the Restricted Stock Units are scheduled to vest on March 25, 2027 and on March 25, 2028, subject to the Reporting Person continuing to provide service through such date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On March 25, 2025, the Reporting Person was granted 2,946 Restricted Stock Units, as to this grant, one-third of the Restricted Stock Units vested on March 25, 2026, and one-third of the Restricted Stock Units are scheduled to vest on March 25, 2027 and on March 25, 2028, subject to the Reporting Person continuing to provide service through such date."}],"balance_after":1964,"derivative":{"underlying":"Common Stock","underlying_shares":982},"source":{"system":"sec-edgar","filing":"0001556224-26-000002","document":"wk-form4_1774650905.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000155622426000002/wk-form4_1774650905.xml","form_type":"4"}},{"id":826237,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":27472,"kind":"person","name":"Coleman Richard Kenneth Jr.","position":1,"cik":"0001556224","reported_name":"Coleman Richard Kenneth Jr.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2026-03-27T22:35:13.000Z","date":"2026-03-25","kind":"exercise","planned":false,"acquired":true,"shares":982,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."}],"balance_after":19977,"source":{"system":"sec-edgar","filing":"0001556224-26-000002","document":"wk-form4_1774650905.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000155622426000002/wk-form4_1774650905.xml","form_type":"4"}},{"id":826236,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":27472,"kind":"person","name":"Coleman Richard Kenneth Jr.","position":1,"cik":"0001556224","reported_name":"Coleman Richard Kenneth Jr.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2026-03-27T22:35:13.000Z","date":"2026-03-25","kind":"purchase","planned":false,"acquired":true,"shares":977,"price":9.95,"value":9721.15,"ownership":{"direct":true},"balance_after":18995,"source":{"system":"sec-edgar","filing":"0001556224-26-000002","document":"wk-form4_1774650905.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000155622426000002/wk-form4_1774650905.xml","form_type":"4"}},{"id":826235,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":27472,"kind":"person","name":"Coleman Richard Kenneth Jr.","position":1,"cik":"0001556224","reported_name":"Coleman Richard Kenneth Jr.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2026-03-27T22:35:13.000Z","date":"2026-03-19","kind":"grant","planned":false,"acquired":true,"shares":4537,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On March 19, 2026 (the \"Grant Date\"), restricted stock units (\"RSUs\") were granted to the Reporting Person under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. The RSUs are subject to time-based vesting conditions, vesting 33% on the first anniversary of the Grant Date (1,497 RSUs), 33% on the second anniversary of the Grant Date (1,497 RSUs), and 34% on the third anniversary of the Grant Date (1,543 RSUs)."}],"balance_after":18018,"source":{"system":"sec-edgar","filing":"0001556224-26-000002","document":"wk-form4_1774650905.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000155622426000002/wk-form4_1774650905.xml","form_type":"4"}},{"id":826599,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-03-27T22:34:45.000Z","date":"2026-03-25","kind":"exercise","planned":false,"acquired":false,"shares":460,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On March 25, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC common stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 460 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on March 25, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On March 25, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC common stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 460 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on March 25, 2026."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":460},"source":{"system":"sec-edgar","filing":"0002029470-26-000002","document":"wk-form4_1774650883.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000002/wk-form4_1774650883.xml","form_type":"4"}},{"id":826598,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-27T22:34:45.000Z","date":"2026-03-27","kind":"purchase","planned":false,"acquired":true,"shares":300,"price":10.15,"value":3045.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 7,012 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of Common Stock payable upon the first anniversary of the Grant Date."}],"balance_after":13073,"source":{"system":"sec-edgar","filing":"0002029470-26-000002","document":"wk-form4_1774650883.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000002/wk-form4_1774650883.xml","form_type":"4"}},{"id":826597,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-27T22:34:45.000Z","date":"2026-03-27","kind":"purchase","planned":false,"acquired":true,"shares":500,"price":10.1,"value":5050.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 7,012 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of Common Stock payable upon the first anniversary of the Grant Date."}],"balance_after":12773,"source":{"system":"sec-edgar","filing":"0002029470-26-000002","document":"wk-form4_1774650883.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000002/wk-form4_1774650883.xml","form_type":"4"}},{"id":826596,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-27T22:34:45.000Z","date":"2026-03-26","kind":"purchase","planned":false,"acquired":true,"shares":300,"price":10.17,"value":3051.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 7,012 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of Common Stock payable upon the first anniversary of the Grant Date."}],"balance_after":12273,"source":{"system":"sec-edgar","filing":"0002029470-26-000002","document":"wk-form4_1774650883.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000002/wk-form4_1774650883.xml","form_type":"4"}},{"id":826595,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-27T22:34:45.000Z","date":"2026-03-26","kind":"purchase","planned":false,"acquired":true,"shares":500,"price":10.15,"value":5075.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 7,012 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of Common Stock payable upon the first anniversary of the Grant Date."}],"balance_after":11973,"source":{"system":"sec-edgar","filing":"0002029470-26-000002","document":"wk-form4_1774650883.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000002/wk-form4_1774650883.xml","form_type":"4"}},{"id":826594,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-27T22:34:45.000Z","date":"2026-03-25","kind":"purchase","planned":false,"acquired":true,"shares":300,"price":9.82,"value":2946.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 7,012 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of Common Stock payable upon the first anniversary of the Grant Date."}],"balance_after":11473,"source":{"system":"sec-edgar","filing":"0002029470-26-000002","document":"wk-form4_1774650883.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000002/wk-form4_1774650883.xml","form_type":"4"}},{"id":826593,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-27T22:34:45.000Z","date":"2026-03-25","kind":"purchase","planned":false,"acquired":true,"shares":500,"price":9.76,"value":4880.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 7,012 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of Common Stock payable upon the first anniversary of the Grant Date."}],"balance_after":11173,"source":{"system":"sec-edgar","filing":"0002029470-26-000002","document":"wk-form4_1774650883.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000002/wk-form4_1774650883.xml","form_type":"4"}},{"id":826592,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21729,"kind":"person","name":"Fruhbeis Todd Michael","position":1,"cik":"0002029470","reported_name":"Fruhbeis Todd Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-27T22:34:45.000Z","date":"2026-03-25","kind":"exercise","planned":false,"acquired":true,"shares":460,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 7,012 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of Common Stock payable upon the first anniversary of the Grant Date."}],"balance_after":10673,"source":{"system":"sec-edgar","filing":"0002029470-26-000002","document":"wk-form4_1774650883.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029470/000202947026000002/wk-form4_1774650883.xml","form_type":"4"}},{"id":826602,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21728,"kind":"person","name":"Parks Louis A.","position":1,"cik":"0002029214","reported_name":"Parks Louis A.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-03-27T22:34:17.000Z","date":"2026-03-25","kind":"exercise","planned":false,"acquired":false,"shares":417,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On March 25, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC common stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 417 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on March 25, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On March 25, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC common stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 417 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on March 25, 2026."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":417},"source":{"system":"sec-edgar","filing":"0002029214-26-000003","document":"wk-form4_1774650855.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2029214/000202921426000003/wk-form4_1774650855.xml","form_type":"4"}},{"id":826601,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21728,"kind":"person","name":"Parks Louis A.","position":1,"cik":"0002029214","reported_name":"Parks Louis A.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-27T22:34:17.000Z","date":"2026-03-27","kind":"purchase","planned":false,"acquired":true,"shares":1500,"price":10.01,"value":15015.0,"ownership":{"direct":true},"balance_after":9309,"source":{"system":"sec-edgar","filing":"0002029214-26-000003","document":"wk-form4_1774650855.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2029214/000202921426000003/wk-form4_1774650855.xml","form_type":"4"}},{"id":826600,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21728,"kind":"person","name":"Parks Louis A.","position":1,"cik":"0002029214","reported_name":"Parks Louis A.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-27T22:34:17.000Z","date":"2026-03-25","kind":"exercise","planned":false,"acquired":true,"shares":417,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 7,012 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of Common Stock payable upon the first anniversary of the Grant Date."}],"balance_after":7809,"source":{"system":"sec-edgar","filing":"0002029214-26-000003","document":"wk-form4_1774650855.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029214/000202921426000003/wk-form4_1774650855.xml","form_type":"4"}},{"id":826604,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21730,"kind":"person","name":"Palmer Jennifer","position":1,"cik":"0002029196","reported_name":"Palmer Jennifer","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-03-27T22:33:35.000Z","date":"2026-03-25","kind":"exercise","planned":false,"acquired":false,"shares":396,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On March 25, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC common stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 396 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on March 25, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On March 25, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC common stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 396 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on March 25, 2026."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":396},"source":{"system":"sec-edgar","filing":"0002029196-26-000003","document":"wk-form4_1774650813.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2029196/000202919626000003/wk-form4_1774650813.xml","form_type":"4"}},{"id":826603,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21730,"kind":"person","name":"Palmer Jennifer","position":1,"cik":"0002029196","reported_name":"Palmer Jennifer","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-27T22:33:35.000Z","date":"2026-03-25","kind":"exercise","planned":false,"acquired":true,"shares":396,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 7,012 Restricted Stock Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. Each Restricted Stock Unit represents the right to receive, at settlement, one share of Common Stock payable upon the first anniversary of the Grant Date."}],"balance_after":7769,"source":{"system":"sec-edgar","filing":"0002029196-26-000003","document":"wk-form4_1774650813.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2029196/000202919626000003/wk-form4_1774650813.xml","form_type":"4"}},{"id":826234,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":28002,"kind":"person","name":"Bible Hannah M.","position":1,"cik":"0001607210","reported_name":"Bible Hannah M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-03-27T22:32:34.000Z","date":"2026-03-25","kind":"exercise","planned":false,"acquired":false,"shares":312,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"On March 25, 2025, the Reporting Person was granted 936 Restricted Stock Units, as to this grant, one-third of the Restricted Stock Units vested on March 25, 2026, and one-third of the Restricted Stock Units are scheduled to vest on March 25, 2027 and on March 25, 2028, subject to the Reporting Person continuing to provide service through such date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"On March 25, 2025, the Reporting Person was granted 936 Restricted Stock Units, as to this grant, one-third of the Restricted Stock Units vested on March 25, 2026, and one-third of the Restricted Stock Units are scheduled to vest on March 25, 2027 and on March 25, 2028, subject to the Reporting Person continuing to provide service through such date."}],"balance_after":624,"derivative":{"underlying":"Common Stock","underlying_shares":312},"source":{"system":"sec-edgar","filing":"0001607210-26-000002","document":"wk-form4_1774650751.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000160721026000002/wk-form4_1774650751.xml","form_type":"4"}},{"id":826233,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":28002,"kind":"person","name":"Bible Hannah M.","position":1,"cik":"0001607210","reported_name":"Bible Hannah M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Common Stock","published_at":"2026-03-27T22:32:34.000Z","date":"2026-03-25","kind":"tax_withholding","planned":false,"acquired":false,"shares":115,"price":9.71,"value":1116.65,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"Shares withheld by Issuer to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units. No shares were sold."}],"balance_after":2841,"source":{"system":"sec-edgar","filing":"0001607210-26-000002","document":"wk-form4_1774650751.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000160721026000002/wk-form4_1774650751.xml","form_type":"4"}},{"id":826232,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":28002,"kind":"person","name":"Bible Hannah M.","position":1,"cik":"0001607210","reported_name":"Bible Hannah M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Common Stock","published_at":"2026-03-27T22:32:34.000Z","date":"2026-03-25","kind":"exercise","planned":false,"acquired":true,"shares":312,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."}],"balance_after":2956,"source":{"system":"sec-edgar","filing":"0001607210-26-000002","document":"wk-form4_1774650751.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000160721026000002/wk-form4_1774650751.xml","form_type":"4"}},{"id":826231,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":28002,"kind":"person","name":"Bible Hannah M.","position":1,"cik":"0001607210","reported_name":"Bible Hannah M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Common Stock","published_at":"2026-03-27T22:32:34.000Z","date":"2026-03-25","kind":"grant","planned":false,"acquired":true,"shares":1621,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On March 25, 2026, (the \"Grant Date\") restricted stock units (\"RSUs\") were granted to the Reporting Person, (the \"Grant Date\") as approved by the Board of Directors on March 19, 2026, under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. The RSUs are subject to time-based vesting conditions, vesting 33% on the first anniversary of the Grant Date (1,497 RSUs), 33% on the second anniversary of the Grant Date (1,497 RSUs), and 34% on  the third anniversary of the Grant Date (1,543 RSUs)."}],"balance_after":2644,"source":{"system":"sec-edgar","filing":"0001607210-26-000002","document":"wk-form4_1774650751.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000160721026000002/wk-form4_1774650751.xml","form_type":"4"}},{"id":826230,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":28001,"kind":"person","name":"Miles Shawn Spain","position":1,"cik":"0001742046","reported_name":"Miles Shawn Spain","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2026-03-27T22:02:42.000Z","date":"2026-03-25","kind":"tax_withholding","planned":false,"acquired":false,"shares":95,"price":9.71,"value":922.45,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares withheld by Issuer to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units, each representing the right to receive, at settlement, one share of common stock. No shares were sold."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 1,684 shares of common stock and 6,215 shares of Restricted Stock Units (\"RSUs\") granted to the Reporting Person on July 27, 2023, November 8, 2024, and March 25, 2025. The RSUs. are subject to the Reporting Person continuing to provide service through the RSU's applicable vesting date."}],"balance_after":7899,"source":{"system":"sec-edgar","filing":"0001742046-26-000002","document":"wk-form4_1774648960.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000174204626000002/wk-form4_1774648960.xml","form_type":"4"}},{"id":826229,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":28001,"kind":"person","name":"Miles Shawn Spain","position":1,"cik":"0001742046","reported_name":"Miles Shawn Spain","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2026-03-27T22:02:42.000Z","date":"2026-03-25","kind":"grant","planned":false,"acquired":true,"shares":4537,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On March 25, 2026, (the \"Grant Date\") restricted stock units (\"RSUs\") were granted to the Reporting Person, (the \"Grant Date\") as approved by the Board of Directors on March 19, 2026, under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated. The RSUs are subject to time-based vesting conditions, vesting 33% on the first anniversary of the Grant Date (1,497 RSUs), 33% on the second anniversary of the Grant Date (1,497 RSUs), and 34% on  the third anniversary of the Grant Date (1,543 RSUs)."}],"balance_after":7994,"source":{"system":"sec-edgar","filing":"0001742046-26-000002","document":"wk-form4_1774648960.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000174204626000002/wk-form4_1774648960.xml","form_type":"4"}},{"id":826228,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-03-27T21:37:39.000Z","date":"2026-03-25","kind":"exercise","planned":false,"acquired":false,"shares":740,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"This transaction represents the settlement of Restricted Stock Units in shares of common stock on their scheduled vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents the right to receive, at settlement, one share of common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On March 25, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC common stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 740 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on March 25, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On March 25, 2025, the Reporting Person was granted Restricted Stock Units by Star Operating Companies, Inc. (\"SOC\"), each of which represented the right to receive, at settlement, one share of SOC common stock (\"SOC RSUs\"). Pursuant to the Agreement and Plan of Merger, dated as of May 21, 2025, by and among SOC, the Issuer and HSON Merger Sub, Inc., a wholly owned subsidiary of the Issuer, the Reporting Person's SOC RSUs were exchanged for 740 Restricted Stock Units. As to this grant, one hundred percent (100%) of the Restricted Stock Units vested on March 25, 2026."}],"balance_after":0,"derivative":{"underlying":"Common Stock.","underlying_shares":740},"source":{"system":"sec-edgar","filing":"0001548312-26-000008","document":"wk-form4_1774647456.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000008/wk-form4_1774647456.xml","form_type":"4"}},{"id":826227,"issuer":{"id":7343,"kind":"organization","name":"Star Equity Holdings, Inc.","symbol":"STRR"},"owners":[{"id":21580,"kind":"person","name":"Eberwein Jeffrey E.","position":1,"cik":"0001548312","reported_name":"Eberwein Jeffrey E.","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Series A Preferred Stock","published_at":"2026-03-27T21:37:39.000Z","date":"2026-03-27","kind":"sale","planned":false,"acquired":false,"shares":7354,"price":9.98,"value":73392.92,"ownership":{"direct":true},"balance_after":771939,"source":{"system":"sec-edgar","filing":"0001548312-26-000008","document":"wk-form4_1774647456.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1210708/000154831226000008/wk-form4_1774647456.xml","form_type":"4"}}],"next_cursor":"2026-03-27T21:37:39.000000Z,826227"}