{"transactions":[{"id":794077,"issuer":{"id":7875,"kind":"organization","name":"FibroBiologics, Inc.","symbol":"FBLG"},"owners":[{"id":49990,"kind":"person","name":"GARCIA RUBEN A","position":1,"cik":"0002013617","reported_name":"GARCIA RUBEN A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"General Counsel"}}],"security":"Stock Option (Right to Buy)","published_at":"2026-05-04T23:00:19.000Z","date":"2026-05-04","kind":"grant","planned":false,"acquired":true,"shares":61607,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On May 4, 2026, the reporting person was granted an option to purchase 61,607 shares of common stock. One fourth (1/4th) of the option shares shall vest on the one-year anniversary of the grant date, and the remaining balance of the option shares shall vest in 36 equal consecutive monthly installments thereafter until fully vested so long as the reporting person remains in continuous service through such applicable vesting periods."}],"balance_after":61607,"derivative":{"exercise_price":1.38,"expiration_date":"2036-05-04","underlying":"Common Stock","underlying_shares":61607},"source":{"system":"sec-edgar","filing":"0001493152-26-021172","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2013617/000149315226021172/ownership.xml","form_type":"4"}},{"id":874698,"issuer":{"id":7875,"kind":"organization","name":"FibroBiologics, Inc.","symbol":"FBLG"},"owners":[{"id":49990,"kind":"person","name":"GARCIA RUBEN A","position":1,"cik":"0002013617","reported_name":"GARCIA RUBEN A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"General Counsel"}}],"security":"Common Stock","published_at":"2026-03-02T14:15:05.000Z","date":"2026-02-27","kind":"purchase","planned":false,"acquired":true,"shares":40000,"price":0.3264,"value":13056.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $0.3221 to $0.3268 on February 27, 2026. The reporting person will provide upon request to the SEC, the Issuer, or security holder of the Issuer, full information regarding the number of shares purchased at each separate price."}],"balance_after":180000,"source":{"system":"sec-edgar","filing":"0001493152-26-008469","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2013617/000149315226008469/ownership.xml","form_type":"4"}},{"id":971503,"issuer":{"id":7875,"kind":"organization","name":"FibroBiologics, Inc.","symbol":"FBLG"},"owners":[{"id":49990,"kind":"person","name":"GARCIA RUBEN A","position":1,"cik":"0002013617","reported_name":"GARCIA RUBEN A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"General Counsel"}}],"security":"Common Stock","published_at":"2025-12-12T12:16:10.000Z","date":"2025-12-11","kind":"purchase","planned":false,"acquired":true,"shares":140000,"price":0.34,"value":47600.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $0.3333 to $0.3504 on December 11, 2025. The reporting person will provide upon request to the SEC, the Issuer, or security holder of the Issuer, full information regarding the number of shares purchased at each separate price."}],"balance_after":140000,"source":{"system":"sec-edgar","filing":"0001493152-25-027363","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2013617/000149315225027363/ownership.xml","form_type":"4"}},{"id":1188964,"issuer":{"id":7875,"kind":"organization","name":"FibroBiologics, Inc.","symbol":"FBLG"},"owners":[{"id":49990,"kind":"person","name":"GARCIA RUBEN A","position":1,"cik":"0002013617","reported_name":"GARCIA RUBEN A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"General Counsel"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-03-28T20:10:13.000Z","date":"2025-03-26","kind":"grant","planned":false,"acquired":true,"shares":189000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On March 26, 2025, the reporting person was granted an option to purchase 189,000 shares of common stock. One fourth (1/4th) of the option shares shall vest on the one-year anniversary of the grant date, and the remaining balance of the option shares shall vest in 36 equal consecutive monthly installments thereafter until fully vested so long as the reporting person remains in continuous service through such applicable vesting periods."}],"balance_after":189000,"derivative":{"exercise_price":1.04,"expiration_date":"2035-03-25","underlying":"Common Stock","underlying_shares":189000},"source":{"system":"sec-edgar","filing":"0001641172-25-001188","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2013617/000164117225001188/ownership.xml","form_type":"4"}},{"id":1320511,"issuer":{"id":7875,"kind":"organization","name":"FibroBiologics, Inc.","symbol":"FBLG"},"owners":[{"id":49990,"kind":"person","name":"GARCIA RUBEN A","position":1,"cik":"0002013617","reported_name":"GARCIA RUBEN A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"General Counsel"}}],"security":"Stock Option (Right to Buy)","published_at":"2024-12-30T21:18:32.000Z","date":"2024-12-27","kind":"grant","planned":false,"acquired":true,"shares":176200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On December 27, 2024, the reporting person was granted an option to purchase 176,200 shares of common stock. One fourth (1/4th) of the option shares shall vest on the one year anniversary of the grant date, and the remaining balance of the option shares shall vest in 36 equal consecutive monthly installments thereafter until fully vested so long as the reporting person remains in continuous service through such applicable vesting periods."}],"balance_after":176200,"derivative":{"exercise_price":2.36,"expiration_date":"2034-12-26","underlying":"Common Stock","underlying_shares":176200},"source":{"system":"sec-edgar","filing":"0001493152-24-052488","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2013617/000149315224052488/ownership.xml","form_type":"4"}},{"id":1587254,"issuer":{"id":7875,"kind":"organization","name":"FibroBiologics, Inc.","symbol":"FBLG"},"owners":[{"id":49990,"kind":"person","name":"GARCIA RUBEN A","position":1,"cik":"0002013617","reported_name":"GARCIA RUBEN A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"General Counsel"}}],"security":"Stock Option (Right to Buy)","published_at":"2024-03-08T21:14:06.000Z","date":"2024-03-01","kind":"grant","planned":false,"acquired":true,"shares":180000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On March 1, 2024, the reporting person was granted an option to purchase 180,000 shares of common stock. One fourth (1/4th) of the option shares shall vest on the one year anniversary of the grant date, and the remaining balance of the option shares shall vest in 36 equal consecutive monthly installments thereafter until fully vested so long as the reporting person remains in continuous service through such applicable vesting periods."}],"balance_after":180000,"derivative":{"exercise_price":13,"expiration_date":"2034-02-28","underlying":"Common Stock","underlying_shares":180000},"source":{"system":"sec-edgar","filing":"0001493152-24-009398","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2013617/000149315224009398/ownership.xml","form_type":"4"}}]}