X0306 4 2015-06-04 0 0001123494 HARVARD BIOSCIENCE INC HBIO 0001281069 HARTE NEAL J UNIT # 1 83 CHURCH STREET WINCHESTER MA 01890 1 0 0 0 Common Stock 2015-06-04 4 A 0 14400 0.00 A 85410 D Includes (a) a deferred stock award of 14,400 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 June 4, 2015, immediately prior to the commencement of such meeting, and (ii) June 4, 2016; and (b) 71,010 shares of common stock held by the Reporting Person. This form is signed under power of attorney. /s/ Neal J. Harte 2015-06-08