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These shares were purchased in multiple transactions, and the prices actually paid ranged from $4.80 to $4.95, inclusive. The reporting person has provided to the Issuer, and will provide to any security holder of the Issuer, or the SEC staff, upon request, information regarding the number of shares purchased at each price within the range for all transactions reported in this Form 4 utilizing an average weighted price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) 12,525 shares of common stock purchased on March 16, 2026, (b) 8,475 shares of common stock purchased on March 17, 2026, and (c) 11,000 restricted stock units that fully vest on December 17, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"On March 13, 2026, the common stock of Harvard Bioscience, Inc. underwent a reverse stock split in a ratio of 10-for-1. 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These shares were purchased in multiple transactions, and the prices actually paid ranged from $4.85 to $5.00, inclusive. The reporting person has provided to the Issuer, and will provide to any security holder of the Issuer, or the Securities and Exchange Commission (\"SEC\") staff, upon request, information regarding the number of shares purchased at each price within the range for all transactions reported in this Form 4 utilizing an average weighted price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes (a) 12,525 shares of common stock purchased on March 16, 2026, and (b) 11,000 restricted stock units that fully vest on December 17, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"On March 13, 2026, the common stock of Harvard Bioscience, Inc. underwent a reverse stock split in a ratio of 10-for-1. 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The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes (a) 38,259 restricted stock units that fully vest on the earlier to occur of (i) the date of the Issuer's next Annual Meeting of Stockholders after May 17, 2022, immediately prior to the commencement of such meeting, and (ii) May 24, 2023 and (b) 164,226 shares of common stock held by the Report Person."}],"balance_after":202485,"source":{"system":"sec-edgar","filing":"0000921895-23-000702","document":"form412799edr_03162023.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189523000702/form412799edr_03162023.xml","form_type":"4"}},{"id":1950353,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":20037,"kind":"person","name":"EDRICK ALAN I","position":1,"cik":"0001195340","reported_name":"EDRICK ALAN I","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-03-16T22:02:18.000Z","date":"2023-03-14","kind":"purchase","acquired":true,"shares":13808,"price":2.67,"value":36867.36,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $2.61 to $2.72, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":186293,"source":{"system":"sec-edgar","filing":"0000921895-23-000702","document":"form412799edr_03162023.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189523000702/form412799edr_03162023.xml","form_type":"4"}},{"id":1952559,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":76365,"kind":"person","name":"Green James W","position":1,"cik":"0001400121","reported_name":"Green James W","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2023-03-15T22:35:57.000Z","date":"2023-03-15","kind":"purchase","acquired":true,"shares":20000,"price":2.6,"value":52000.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $2.57 to $2.63, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) the shares and awards described in footnote (2) above, and (b) the shares purchased in the transaction described in footnote (3) above."}],"balance_after":2886052,"source":{"system":"sec-edgar","filing":"0000921895-23-000690","document":"form412799gre_03152023.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189523000690/form412799gre_03152023.xml","form_type":"4"}},{"id":1952558,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":76365,"kind":"person","name":"Green James W","position":1,"cik":"0001400121","reported_name":"Green James W","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2023-03-15T22:35:57.000Z","date":"2023-03-14","kind":"purchase","acquired":true,"shares":20000,"price":2.67,"value":53400.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $2.61 to $2.70, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) the shares described in footnote (1) above, (b) 353,140 restricted stock units that will vest in three equal installments on December 29, 2023, 2024 and 2025, (c) 104,691 restricted stock units that will vest in two equal installments on December 29, 2023 and 2024, (d) 109,071 restricted stock units that will vest on June 11, 2023, (e) 64,899 restricted stock units that will vest on December 29, 2023, (f) 54,535 restricted stock units that will vest on December 29, 2023, (g) 671,649 restricted stock units with performance based vesting conditions tied to relative total shareholder return and (h) 1,488,067 shares of common stock beneficially owned by the Reporting Person."}],"balance_after":2866052,"source":{"system":"sec-edgar","filing":"0000921895-23-000690","document":"form412799gre_03152023.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189523000690/form412799gre_03152023.xml","form_type":"4"}},{"id":1963820,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":76365,"kind":"person","name":"Green James W","position":1,"cik":"0001400121","reported_name":"Green James W","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2023-03-08T22:02:41.000Z","date":"2023-03-06","kind":"grant","acquired":true,"shares":339610,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents an award of 339,610 restricted stock units with performance based vesting conditions. 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The target number of these restricted stock units that may be earned is reported above; the maximum amount is 150% of the number reported."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) the shares and awards described in footnote (2) above, and (b) the award described in footnote (3) above."}],"balance_after":2846052,"source":{"system":"sec-edgar","filing":"0000921895-23-000668","document":"form412799gre_03082023.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189523000668/form412799gre_03082023.xml","form_type":"4"}},{"id":1963819,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":76365,"kind":"person","name":"Green James W","position":1,"cik":"0001400121","reported_name":"Green James W","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2023-03-08T22:02:41.000Z","date":"2023-03-06","kind":"grant","acquired":true,"shares":353140,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of 353,140 restricted stock units that will vest in three equal installments on December 29, 2023, 2024 and 2025, subject to the terms set forth in an award agreement between the Issuer and the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) the award described in footnote (1) above, (b) 104,691 restricted stock units that will vest in two equal installments on December 29, 2023 and 2024, (c) 109,071 restricted stock units that will vest on June 11, 2023, (d) 64,899 restricted stock units that will vest on December 29, 2023, (e) 54,535 restricted stock units that will vest on December 29, 2023, (f) 332,039 restricted stock units with performance based vesting conditions tied to relative total shareholder return and (g) 1,488,067 shares of common stock beneficially owned by the Reporting Person."}],"balance_after":2506442,"source":{"system":"sec-edgar","filing":"0000921895-23-000668","document":"form412799gre_03082023.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189523000668/form412799gre_03082023.xml","form_type":"4"}},{"id":1963817,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":81674,"kind":"person","name":"Cote Jennifer","position":1,"cik":"0001960481","reported_name":"Cote Jennifer","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CFO"}}],"security":"Common Stock","published_at":"2023-03-08T22:01:14.000Z","date":"2023-03-06","kind":"grant","acquired":true,"shares":29880,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"Represents an award of 29,880 restricted stock units that will fully vest on March 6, 2024."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Includes (a) the shares and awards described in footnote (4) above and (b) the award described in footnote (5) above."}],"balance_after":112968,"source":{"system":"sec-edgar","filing":"0000921895-23-000667","document":"form412799cot_03082023.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189523000667/form412799cot_03082023.xml","form_type":"4"}},{"id":1963816,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":81674,"kind":"person","name":"Cote Jennifer","position":1,"cik":"0001960481","reported_name":"Cote Jennifer","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CFO"}}],"security":"Common Stock","published_at":"2023-03-08T22:01:14.000Z","date":"2023-03-06","kind":"grant","acquired":true,"shares":25862,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents an award of 25,862 restricted stock units with performance based vesting conditions. These restricted stock units will vest upon the achievement of a relative total shareholder return of the Issuer's common stock during the period from March 1, 2023 to the earlier of (i) December 31, 2025, and (ii) the date of a change of control (the \"Measurement Period\"), measured relative to the Russell 2000 index and based on the 20-day trading average beginning on the first day of the Measurement Period and ending on the last day of the Measurement Period, subject to the terms set forth in an award agreement between the Issuer and the Reporting Person. The target number of these restricted stock units that may be earned is reported above; the maximum amount is 150% of the number reported."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) the shares and awards described in footnote (2) above and (b) the award described in footnote (3) above."}],"balance_after":83088,"source":{"system":"sec-edgar","filing":"0000921895-23-000667","document":"form412799cot_03082023.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189523000667/form412799cot_03082023.xml","form_type":"4"}},{"id":1963815,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":81674,"kind":"person","name":"Cote Jennifer","position":1,"cik":"0001960481","reported_name":"Cote 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to satisfy the Reporting Person's tax withholding obligation in connection with a restricted stock unit award previously granted to the Reporting Person that vested on January 1, 2023."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F8","text":"Includes (a) the shares and awards described in footnote (2) above, less (b) the disposition of shares reported in footnotes (3), (5) and (7) above."}],"balance_after":2153302,"source":{"system":"sec-edgar","filing":"0000921895-23-000012","document":"form412799gre_01032023.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189523000012/form412799gre_01032023.xml","form_type":"4"}},{"id":2072996,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":76365,"kind":"person","name":"Green James W","position":1,"cik":"0001400121","reported_name":"Green James 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to satisfy the Reporting Person's tax withholding obligation in connection with a restricted stock unit award previously granted to the Reporting Person that vested in part on December 29, 2022."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) the shares and awards described in footnote (2) above, less (b) the disposition of shares reported in footnote (3) above."}],"balance_after":2225840,"source":{"system":"sec-edgar","filing":"0000921895-23-000012","document":"form412799gre_01032023.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189523000012/form412799gre_01032023.xml","form_type":"4"}},{"id":2072994,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":76365,"kind":"person","name":"Green James W","position":1,"cik":"0001400121","reported_name":"Green James 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The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) the shares and awards described in footnote (2) above, and (b) the shares purchased in the transaction described in footnote (3) above."}],"balance_after":2278811,"source":{"system":"sec-edgar","filing":"0000921895-22-003154","document":"form412799gre_12022022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522003154/form412799gre_12022022.xml","form_type":"4"}},{"id":2098759,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":76365,"kind":"person","name":"Green James W","position":1,"cik":"0001400121","reported_name":"Green James W","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2022-12-02T21:01:30.000Z","date":"2022-11-30","kind":"purchase","acquired":true,"shares":15000,"price":2.41,"value":36150.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $2.31 to $2.45, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) the shares described in footnote (1) above, (b) 157,037 restricted stock units that will vest in three equal installments on December 29, 2022, 2023 and 2024, (c) 109,071 remaining restricted stock units that will vest on June 11, 2023, (d) 129,799 restricted stock units that will vest in two equal installments on December 29, 2022 and 2023, (e) 109,070 remaining restricted stock units that will vest on December 29, 2022 and 2023, (f) 104,590 remaining restricted stock units that will vest on January 1, 2023, (g) 332,039 restricted stock units with performance based vesting conditions tied to relative total shareholder return and (h) 1,307,205 shares of common stock beneficially owned by the Reporting Person."}],"balance_after":2263811,"source":{"system":"sec-edgar","filing":"0000921895-22-003154","document":"form412799gre_12022022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522003154/form412799gre_12022022.xml","form_type":"4"}},{"id":2158647,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":26939,"kind":"person","name":"LOY BERTRAND","position":1,"cik":"0001197452","reported_name":"LOY BERTRAND","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-09-15T20:02:15.000Z","date":"2022-09-06","kind":"other","acquired":false,"shares":108715,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"by The BZH Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On September 6, 2022, the Reporting Person transferred 108,715 shares of common stock to the Bertrand M. Loy Revocable Trust."},{"field":"shares","element":"transactionShares","label":"F2","text":"In addition to the 68,466 shares held by The BZH Trust, as previously reported, this number also includes 29,623 shares previously transferred by the Reporting Person to The BZH Trust in September 2020 and 10,626 shares previously transferred by the Reporting Person to The BZH Trust in May 2022."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000921895-22-002653","document":"form412799001_09152022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522002653/form412799001_09152022.xml","form_type":"4"}},{"id":2172109,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":26939,"kind":"person","name":"LOY BERTRAND","position":1,"cik":"0001197452","reported_name":"LOY BERTRAND","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-08-29T21:24:36.000Z","date":"2022-08-26","kind":"purchase","acquired":true,"shares":9291,"price":3.41,"value":31682.31,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $3.32 to $3.47, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) the shares purchased in the transaction described in footnote (1) above, (b) 47,493 restricted stock units that will vest on the earlier to occur of (i) the date of the Issuer's next Annual Meeting of Stockholders, immediately prior to the commencement of such meeting, and (ii) May 24, 2023, and (c) 342,867 shares of common stock held by the Reporting Person."}],"balance_after":399651,"source":{"system":"sec-edgar","filing":"0000921895-22-002574","document":"form412799001_08292022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522002574/form412799001_08292022.xml","form_type":"4"}},{"id":2173130,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":26939,"kind":"person","name":"LOY BERTRAND","position":1,"cik":"0001197452","reported_name":"LOY BERTRAND","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-08-26T20:02:06.000Z","date":"2022-08-25","kind":"purchase","acquired":true,"shares":8244,"price":3.34,"value":27534.96,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $3.23 to $3.44, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) the shares described in footnote (2) above and (b) the shares purchased in the transaction described in footnote (3) above."}],"balance_after":390360,"source":{"system":"sec-edgar","filing":"0000921895-22-002553","document":"form412799001_08262022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522002553/form412799001_08262022.xml","form_type":"4"}},{"id":2173129,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":26939,"kind":"person","name":"LOY BERTRAND","position":1,"cik":"0001197452","reported_name":"LOY BERTRAND","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-08-26T20:02:06.000Z","date":"2022-08-24","kind":"purchase","acquired":true,"shares":17291,"price":3.23,"value":55849.93,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $3.17 to $3.28, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) the shares purchased in the transaction described in footnote (1) above, (b) 47,493 restricted stock units that will vest on the earlier to occur of (i) the date of the Issuer's next Annual Meeting of Stockholders, immediately prior to the commencement of such meeting, and (ii) May 24, 2023, and (c) 317,332 shares of common stock held by the Reporting Person."}],"balance_after":382116,"source":{"system":"sec-edgar","filing":"0000921895-22-002553","document":"form412799001_08262022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522002553/form412799001_08262022.xml","form_type":"4"}},{"id":2175195,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":26939,"kind":"person","name":"LOY BERTRAND","position":1,"cik":"0001197452","reported_name":"LOY BERTRAND","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-08-24T20:06:46.000Z","date":"2022-08-23","kind":"purchase","acquired":true,"shares":8939,"price":3.23,"value":28872.97,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $3.195 to $3.26, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) the shares described in footnote (2) above and (b) the shares purchased in the transaction described in footnote (3) above."}],"balance_after":364825,"source":{"system":"sec-edgar","filing":"0000921895-22-002529","document":"form412799001_08242022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522002529/form412799001_08242022.xml","form_type":"4"}},{"id":2175194,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":26939,"kind":"person","name":"LOY BERTRAND","position":1,"cik":"0001197452","reported_name":"LOY BERTRAND","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-08-24T20:06:46.000Z","date":"2022-08-22","kind":"purchase","acquired":true,"shares":4918,"price":3.16,"value":15540.88,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $3.13 to $3.22, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) the shares purchased in the transaction described in footnote (1) above, (b) 47,493 restricted stock units that will vest on the earlier to occur of (i) the date of the Issuer's next Annual Meeting of Stockholders, immediately prior to the commencement of such meeting, and (ii) May 24, 2023, and (c) 303,475 shares of common stock held by the Reporting Person."}],"balance_after":355886,"source":{"system":"sec-edgar","filing":"0000921895-22-002529","document":"form412799001_08242022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522002529/form412799001_08242022.xml","form_type":"4"}},{"id":2177215,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":26939,"kind":"person","name":"LOY BERTRAND","position":1,"cik":"0001197452","reported_name":"LOY BERTRAND","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-08-22T20:08:10.000Z","date":"2022-08-19","kind":"purchase","acquired":true,"shares":9608,"price":3.28,"value":31514.24,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $3.24 to $3.30, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) the shares described in footnote (2) above and (b) the shares purchased in the transaction described in footnote (3) above."}],"balance_after":350968,"source":{"system":"sec-edgar","filing":"0000921895-22-002509","document":"form412799001_08222022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522002509/form412799001_08222022.xml","form_type":"4"}},{"id":2177214,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":26939,"kind":"person","name":"LOY BERTRAND","position":1,"cik":"0001197452","reported_name":"LOY BERTRAND","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-08-22T20:08:10.000Z","date":"2022-08-18","kind":"purchase","acquired":true,"shares":1151,"price":3.19,"value":3671.69,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $3.175 to $3.20, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) the shares purchased in the transaction described in footnote (1) above, (b) 47,493 restricted stock units that will vest on the earlier to occur of (i) the date of the Issuer's next Annual Meeting of Stockholders, immediately prior to the commencement of such meeting, and (ii) May 24, 2023, and (c) 292,716 shares of common stock held by the Reporting Person."}],"balance_after":341360,"source":{"system":"sec-edgar","filing":"0000921895-22-002509","document":"form412799001_08222022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522002509/form412799001_08222022.xml","form_type":"4"}},{"id":2179926,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":76365,"kind":"person","name":"Green James W","position":1,"cik":"0001400121","reported_name":"Green James W","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2022-08-18T20:19:12.000Z","date":"2022-08-17","kind":"purchase","acquired":true,"shares":40000,"price":3.19,"value":127600.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $3.14 to $3.23, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) the shares described in footnote (1) above, (b) 157,037 restricted stock units that will vest in three equal installments on December 29, 2022, 2023 and 2024, (c) 109,071 remaining restricted stock units that will vest on June 11, 2023, (d) 129,799 restricted stock units that will vest in two equal installments on December 29, 2022 and 2023, (e) 109,070 remaining restricted stock units that will vest on December 29, 2022 and 2023, (f) 104,590 remaining restricted stock units that will vest on January 1, 2023, (g) 332,039 restricted stock units with performance based vesting conditions tied to relative total shareholder return and (h) 1,267,205 shares of common 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The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) the shares described in footenote (1) above, (b) 157,037 restricted stock units that will vest in three equal installments on December 29, 2022, 2023 and 2024, (c) 109,071 remaining restricted stock units that will vest on June 11, 2023, (d) 129,799 restricted stock units that will vest in two equal installments on December 29, 2022 and 2023, (e) 109,070 remaining restricted stock units that will vest on December 29, 2022 and 2023, (f) 104,590 remaining restricted stock units that will vest on January 1, 2023, (g) 541,218 restricted stock units with performance based vesting conditions tied to relative total shareholder return and (h) 1,120,797 shares of common 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the earlier to occur of (i) the date of the Issuer's next Annual Meeting of Stockholders after May 17, 2022, immediately prior to the commencement of such meeting, and (ii) May 24, 2023."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) the award described in footnote (1) above and (b) 201,441 shares of common stock held by the Reporting Person."}],"balance_after":239700,"source":{"system":"sec-edgar","filing":"0000921895-22-001801","document":"form412799001ead_05262022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522001801/form412799001ead_05262022.xml","form_type":"4"}},{"id":2276459,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":76365,"kind":"person","name":"Green James W","position":1,"cik":"0001400121","reported_name":"Green James 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The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) the shares and awards described in footnote (2) above, and (b) the shares purchased in the transaction described in footnote (3) above."}],"balance_after":2319955,"source":{"system":"sec-edgar","filing":"0000921895-22-001555","document":"form412799001_05102022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522001555/form412799001_05102022.xml","form_type":"4"}},{"id":2276458,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":76365,"kind":"person","name":"Green James W","position":1,"cik":"0001400121","reported_name":"Green James W","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2022-05-10T21:13:49.000Z","date":"2022-05-06","kind":"purchase","acquired":true,"shares":30000,"price":3.78,"value":113400.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $3.705 to $3.845, inclusive. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) 157,037 restricted stock units that will vest in three equal installments on December 29, 2022, 2023 and 2024, (b) 218,140 remaining restricted stock units that will vest on June 11, 2022 and 2023, (c) 129,799 restricted stock units that will vest in two equal installments on December 29, 2022 and 2023, (d) 109,070 remaining restricted stock units that will vest on December 29, 2022 and 2023, (e) 104,590 remaining restricted stock units that will vest on January 1, 2023, (f) 541,218 restricted stock units with performance based vesting conditions tied to relative total shareholder return and (g) 1,050,101 shares of common stock beneficially owned by the Reporting Person."}],"balance_after":2309955,"source":{"system":"sec-edgar","filing":"0000921895-22-001555","document":"form412799001_05102022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522001555/form412799001_05102022.xml","form_type":"4"}},{"id":2355785,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":40857,"kind":"person","name":"Rossi Michael A.","position":1,"cik":"0001783869","reported_name":"Rossi Michael A.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-03-04T02:14:35.000Z","date":"2022-03-01","kind":"grant","acquired":true,"shares":28716,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents an award of 28,716 restricted stock units with performance based vesting conditions. These restricted stock units will vest upon the achievement of a relative total shareholder return of the Issuer's common stock during the period from March 1, 2022 to the earlier of (i) December 31, 2024, and (ii) the date of a change of control (the \"Measurement Period\"), measured relative to the Russell 2000 index and based on the 20-day trading average beginning on the first day of the Measurement Period and ending on the last day of the Measurement Period, subject to the terms set forth in an award agreement between the Issuer and the Reporting Person. The target number of these restricted stock units that may be earned is reported above; the maximum amount is 150% of the number reported."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) the shares and awards described in footnote (2) above, and (b) the award described in footnote (3) above."}],"balance_after":283833,"source":{"system":"sec-edgar","filing":"0001193805-22-000420","document":"e621404_4-michael.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000119380522000420/e621404_4-michael.xml","form_type":"4"}},{"id":2355784,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":40857,"kind":"person","name":"Rossi Michael A.","position":1,"cik":"0001783869","reported_name":"Rossi Michael A.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-03-04T02:14:35.000Z","date":"2022-03-01","kind":"grant","acquired":true,"shares":31021,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of 31,021 restricted stock units that will vest in three equal installments on December 29, 2022, 2023 and 2024, subject to the terms set forth in an award agreement between the Issuer and the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) the award described in footnote (1) above, (b) 43,092 remaining restricted stock units that will vest on June 11, 2022 and 2023, (c) 25,641 restricted stock units that will vest in two equal installments on December 29, 2022 and 2023, (d) 36,876 restricted stock units with performance based vesting conditions, (e) 23,878 remaining restricted stock units that will vest on July 18, 2022, (f) 21,545 remaining restricted stock units that will vest on December 29, 2022 and 2023, and (g) 73,064 shares of common stock beneficially owned by the Reporting Person."}],"balance_after":255117,"source":{"system":"sec-edgar","filing":"0001193805-22-000420","document":"e621404_4-michael.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000119380522000420/e621404_4-michael.xml","form_type":"4"}},{"id":2355783,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":76365,"kind":"person","name":"Green James W","position":1,"cik":"0001400121","reported_name":"Green James W","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2022-03-04T02:13:35.000Z","date":"2022-03-01","kind":"grant","acquired":true,"shares":145365,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents an award of 145,365 restricted stock units with performance based vesting conditions. These restricted stock units will vest upon the achievement of a relative total shareholder return of the Issuer's common stock during the period from March 1, 2022 to the earlier of (i) December 31, 2024, and (ii) the date of a change of control (the \"Measurement Period\"), measured relative to the Russell 2000 index and based on the 20-day trading average beginning on the first day of the Measurement Period and ending on the last day of the Measurement Period, subject to the terms set forth in an award agreement between the Issuer and the Reporting Person. The target number of these restricted stock units that may be earned is reported above; the maximum amount is 150% of the number reported."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) the shares and awards described in footnote (2) above, and (b) the award described in footnote (3) above."}],"balance_after":2279955,"source":{"system":"sec-edgar","filing":"0001193805-22-000419","document":"e621405_4-james.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000119380522000419/e621405_4-james.xml","form_type":"4"}},{"id":2355782,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":76365,"kind":"person","name":"Green James W","position":1,"cik":"0001400121","reported_name":"Green James W","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2022-03-04T02:13:35.000Z","date":"2022-03-01","kind":"grant","acquired":true,"shares":157037,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of 157,037 restricted stock units that will vest in three equal installments on December 29, 2022, 2023 and 2024, subject to the terms set forth in an award agreement between the Issuer and the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) the award described in footnote (1) above, (b) 218,140 remaining restricted stock units that will vest on June 11, 2022 and 2023, (c) 129,799 restricted stock units that will vest in two equal installments on December 29, 2022 and 2023, (d) 109,070 remaining restricted stock units that will vest on December 29, 2022 and 2023, (e) 104,590 remaining restricted stock units that will vest on January 1, 2023, (f) 395,853 restricted stock units with performance based vesting conditions tied to relative total shareholder return, and (g) 1,020,101 shares of common stock beneficially owned by the Reporting Person."}],"balance_after":2134590,"source":{"system":"sec-edgar","filing":"0001193805-22-000419","document":"e621405_4-james.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000119380522000419/e621405_4-james.xml","form_type":"4"}},{"id":2454693,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":40857,"kind":"person","name":"Rossi Michael A.","position":1,"cik":"0001783869","reported_name":"Rossi Michael A.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-01-04T00:53:00.000Z","date":"2021-12-29","kind":"tax_withholding","acquired":false,"shares":3763,"price":7.27,"value":27357.01,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"The shares were disposed of to satisfy the Reporting Person's tax withholding obligation in connection with a performance restricted stock unit award previously granted to the Reporting Person that vested in part on December 29, 2021."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) the shares and awards described in footnote (2) above, less (b) the disposition of shares reported in footnote (3) above."}],"balance_after":224096,"source":{"system":"sec-edgar","filing":"0000921895-22-000035","document":"form412799ros_01032022.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000092189522000035/form412799ros_01032022.xml","form_type":"4"}}],"next_cursor":"2022-01-04T00:53:00.000000Z,2454693"}