X0306 4 2016-05-06 0 0001123494 HARVARD BIOSCIENCE INC HBIO 0001504983 Gagnon Robert E. C/O HARVARD BIOSCIENCE, INC. 84 OCTOBER HILL ROAD HOLLISTON MA 01746 0 1 0 0 Chief Financial Officer Common Stock 2016-05-06 4 A 0 88652 0.00 A 153897 D Common Stock 2016-05-06 4 A 0 88652 0.00 A 242549 D Represents a deferred stock award of 88,652 restricted stock units which shall vest in four equal installments on January 1, 2017, 2018, 2019 and 2020. Includes (a) a deferred stock award of 88,652 restricted stock units which shall vest in four equal installments on January 1, 2017, 2018, 2019 and 2020; (b) a deferred stock award of 19,875 restricted stock units which shall vest in three equal installments on January 1, 2017, 2018 and 2019; (c) a deferred stock award of 28,117 restricted stock units with performance based vesting conditions, which shall vest on August 3, 2018 contingent upon achievement of a performance condition tied to relative total shareholder return; and (d) 17,253 shares of common stock held by the Reporting Person. Represents a deferred stock award of 88,652 restricted stock units which shall vest in full on May 6, 2018. Includes (a) a deferred stock award of 88,652 restricted stock units which shall vest in full on May 6, 2018; (b) a deferred stock award of 88,652 restricted stock units which shall vest in four equal installments on January 1, 2017, 2018, 2019 and 2020; (c) a deferred stock award of 19,875 restricted stock units which shall vest in three equal installments on January 1, 2017, 2018 and 2019; (d) a deferred stock award of 28,117 restricted stock units with performance based vesting conditions, which shall vest on August 3, 2018 contingent upon achievement of a performance condition tied to relative total shareholder return; and (e) 17,253 shares of common stock held by the Reporting Person. This form is signed under power of attorney. /s/ Chad Porter, by power of attorney 2016-05-10