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These retainer awards are granted in satisfaction of the annual retainer compensation to be earned by the director for his service on the Issuer's Board of Directors and its Committees during 2021. 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These retainer awards are granted in satisfaction of the annual retainer compensation to be earned by the director for his service on the Issuer's Board of Directors and its Committees during 2020. 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These retainer awards are granted in satisfaction of the annual retainer compensation to be earned by the director for his service on the Issuer's Board of Directors and its Committees during 2019. 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This retainer award was granted in lieu and satisfaction of the annual cash retainer compensation to be earned by the director for his service on a committee of the Issuer's Board of Directors that the reporting person was appointed to following the 2018 Annual Meeting of Stockholders. The number of shares of common stock subject to such retainer award is equal to the amount of cash that would have been received had the applicable retainer all been paid in cash, divided by the average daily closing market price of the Issuer's common stock for the month of March, rounded to the nearest 100 shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes (a) a deferred stock award of 2,400 restricted stock units which vest quarterly in equal installments on June 30, 2018, September 30, 2018 and December 31, 2018 as described in footnote 3 above; (b) a deferred stock award of 18,100 restricted stock units which fully vest on the earlier of (i) the date of the Issuer's next Annual Meeting of Stockholders after May 17, 2018, immediately prior to the commencement of such meeting, and (ii) May 17, 2019; (c) a deferred stock award of 10,425 restricted stock units which vest quarterly in equal installments on June 30, 2018, September 30, 2018 and December 31, 2018; and (d) 279,555 shares of common stock held by the Reporting Person."}],"balance_after":310480,"source":{"system":"sec-edgar","filing":"0001209191-18-035683","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000120919118035683/doc4.xml","form_type":"4"}},{"id":3905922,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":140867,"kind":"person","name":"KENNEDY JOHN F","position":1,"cik":"0001138315","reported_name":"KENNEDY JOHN F","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-06-05T20:25:49.000Z","date":"2018-05-17","kind":"disposition_to_issuer","acquired":false,"shares":1650,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The subject restricted stock units were granted to the reporting person on January 1, 2018 and were forfeited as a result of the reporting person no longer being the Chairman of the Compensation Committee of the Issuer."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) a deferred stock award of 18,100 restricted stock units which fully vest on the earlier of (i) the date of the Issuer's next Annual Meeting of Stockholders after May 17, 2018, immediately prior to the commencement of such meeting, and (ii) May 17, 2019; (b) a deferred stock award of 10,425 restricted stock units which vest quarterly in equal installments on June 30, 2018, September 30, 2018 and December 31, 2018; and (c) 279,555 shares of common stock held by the Reporting Person."}],"balance_after":308080,"source":{"system":"sec-edgar","filing":"0001209191-18-035683","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000120919118035683/doc4.xml","form_type":"4"}},{"id":3915794,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":140867,"kind":"person","name":"KENNEDY JOHN F","position":1,"cik":"0001138315","reported_name":"KENNEDY JOHN F","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-05-29T20:45:18.000Z","date":"2018-05-24","kind":"grant","acquired":true,"shares":18100,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents a deferred stock award of 18,100 restricted stock units which fully vest on the earlier to occur of (i) the date of the Issuer's next Annual Meeting of Stockholders after May 17, 2018, immediately prior to the commencement of such meeting, and (ii) May 24, 2019."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) a deferred stock award of 18,100 restricted stock units which fully vest on the earlier of (i) the date of the Issuer's next Annual Meeting of Stockholders after May 17, 2018, immediately prior to the commencement of such meeting, and (ii) May 17, 2019; (b) a deferred stock award of 12,900 restricted stock units which vest quarterly in equal installments on June 30, 2018, September 30, 2018 and December 31, 2018; and (c) 278,730 shares of common stock held by the Reporting Person."}],"balance_after":309730,"source":{"system":"sec-edgar","filing":"0001209191-18-033862","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000120919118033862/doc4.xml","form_type":"4"}},{"id":4108040,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":140867,"kind":"person","name":"KENNEDY JOHN F","position":1,"cik":"0001138315","reported_name":"KENNEDY JOHN F","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-01-04T13:39:25.000Z","date":"2018-01-02","kind":"grant","acquired":true,"shares":17200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents a deferred stock award of 17,200 restricted stock units which vest quarterly in equal installments on March 31, 2018, June 30, 2018, September 30, 2018 and December 31, 2018, and are subject to continued service as a non-employee director on the applicable vesting dates. These retainer awards are granted in lieu and satisfaction of the annual cash retainer compensation to be earned by the director for his service on the Issuer's Board of Directors and its Committees during 2018. The number of shares of common stock subject to such retainer award is equal to the amount of cash that would have been received had the retainers all been paid in cash, divided by the average daily closing market price of the Issuer's common stock for the month of November, rounded to the nearest 100 shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) a deferred stock award of 17,200 restricted stock units which vest quarterly in equal installments on March 31, 2018, June 30, 2018, September 30, 2018 and December 31, 2018; (b) a deferred stock award of 31,300 restricted stock units which fully vest on the earlier of (i) the date of the Issuer's next Annual Meeting of Stockholders after May 18, 2017, immediately prior to the commencement of such meeting, and (ii) May 18, 2018; and (c) 243,130 shares of common stock held by the Reporting Person."}],"balance_after":291630,"source":{"system":"sec-edgar","filing":"0001209191-18-001616","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000120919118001616/doc4.xml","form_type":"4"}},{"id":4301567,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":140867,"kind":"person","name":"KENNEDY JOHN F","position":1,"cik":"0001138315","reported_name":"KENNEDY JOHN F","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-05-31T00:42:41.000Z","date":"2017-05-25","kind":"grant","acquired":true,"shares":31300,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents a deferred stock award of 31,300 restricted stock units which fully vest on the earlier to occur of (i) the date of the Issuer's next Annual Meeting of Stockholders after May 18, 2017, immediately prior to the commencement of such meeting, and (ii) May 18, 2018."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) a deferred stock award of 31,300 restricted stock units which fully vest on the earlier of (i) the date of the Issuer's next Annual Meeting of Stockholders after May 18, 2017, immediately prior to the commencement of such meeting, and (ii) May 18, 2018; (b) a deferred stock award of 16,725 restricted stock units which vest quarterly in equal installments on June 30, 2017, September 30, 2017 and December 31, 2017; and (c) 226,405 shares of common stock held by the Reporting Person."}],"balance_after":274430,"source":{"system":"sec-edgar","filing":"0001209191-17-036304","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000120919117036304/doc4.xml","form_type":"4"}},{"id":4382608,"issuer":{"id":7501,"kind":"organization","name":"Harvard Apparatus Regenerative Technology, Inc.","symbol":"HRGN"},"owners":[{"id":140867,"kind":"person","name":"KENNEDY JOHN F","position":1,"cik":"0001138315","reported_name":"KENNEDY JOHN F","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2017-03-16T16:17:04.000Z","date":"2017-03-14","kind":"grant","acquired":true,"shares":18250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Restricted stock units granted by the Issuer pursuant to its 2013 Equity Incentive Plan and qualified under Rule 16b-3(d).  Each restricted stock unit represents a contingent right to receive one share of Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The restricted stock units vest and settle in full one year from the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The restricted stock units vest and settle in full one year from the date of grant."}],"balance_after":18250,"derivative":{"underlying":"Common Stock, par value $0.01 per share","underlying_shares":18250},"source":{"system":"sec-edgar","filing":"0001144204-17-015095","document":"v461955_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1138315/000114420417015095/v461955_4.xml","form_type":"4"}},{"id":4382607,"issuer":{"id":7501,"kind":"organization","name":"Harvard Apparatus Regenerative Technology, Inc.","symbol":"HRGN"},"owners":[{"id":140867,"kind":"person","name":"KENNEDY JOHN F","position":1,"cik":"0001138315","reported_name":"KENNEDY JOHN F","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2017-03-16T16:17:04.000Z","date":"2017-03-14","kind":"grant","acquired":true,"shares":25000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option shares vest in full one year from the date of grant."}],"balance_after":25000,"derivative":{"exercise_price":0.38,"expiration_date":"2027-03-14","underlying":"Common Stock, par value $0.01 per share","underlying_shares":25000},"source":{"system":"sec-edgar","filing":"0001144204-17-015095","document":"v461955_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1138315/000114420417015095/v461955_4.xml","form_type":"4"}},{"id":4503497,"issuer":{"id":7369,"kind":"organization","name":"HARVARD BIOSCIENCE INC"},"owners":[{"id":140867,"kind":"person","name":"KENNEDY JOHN F","position":1,"cik":"0001138315","reported_name":"KENNEDY JOHN F","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-01-04T21:45:08.000Z","date":"2017-01-03","kind":"grant","acquired":true,"shares":22300,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents a deferred stock award of 22,300 restricted stock units which vest quarterly in equal installments on March 31, 2017, June 30, 2017, September 30, 2017 and December 31, 2017, and are subject to continued service as a non-employee director on the applicable vesting dates. These retainer awards are granted in lieu and satisfaction of the annual cash retainer compensation to be earned by the director for his service on the Issuer's Board of Directors and its Committees during 2017. The number of shares of common stock subject to such retainer award is equal to the amount of cash that would have been received had the retainers all been paid in cash, divided by the average daily closing market price of the Issuer's common stock for the month of November, rounded to the nearest 100 shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (a) a deferred stock award of 22,300 restricted stock units which vest quarterly in equal installments on March 31, 2017, June 30, 2017, September 30, 2017 and December 31, 2017; (b) a deferred stock award of 25,300 restricted stock units which fully vest on the earlier of (i) the date of the Issuer's next Annual Meeting of Stockholders after July 1, 2016, immediately prior to the commencement of such meeting, and (ii) July 1, 2017; and (c) 195,530 shares of common stock held by the Reporting Person."}],"balance_after":243130,"source":{"system":"sec-edgar","filing":"0001209191-17-001034","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1123494/000120919117001034/doc4.xml","form_type":"4"}}]}