Stockholders approve 400,000-share increase in 2021 Incentive Plan and amendment to ESPP

Proposal 4 – Approval of the Amendment to the Harvard Bioscience, Inc. Employee Stock Purchase Plan The Company’s stockholders approved the amendment to the Harvard Bioscience, Inc. Employee Stock Purchase Plan to increase the number of authorized shares of common stock available for issuance thereunder, as follows: Votes For Votes Against Votes Abstained Broker Non-Votes 1,705,565 90,905 32,521 970,538

On June 2, 2026, the Company held its Annual Meeting, at which the Company’s stockholders voted on five proposals that are described in detail in the Definitive Proxy Statement. The voting results for each of the proposals are reported below. Proposal 1 - Election of Directors The Company’s stockholders elected two Class II Directors for three-year terms, such terms to continue until the annual meeting of stockholders in 2029 and until such Directors’ successors are duly elected and qualified or until his or her earlier resignation or removal: Name Votes For Votes Withheld Broker Non-Votes John Duke 1,800,288 28,703 970,538 Katherine A. Eade 1,680,982 148,009 970,538

Proposal 3 –Approval, by Non-Binding Advisory Vote, of the Compensation of the Company’s Named Executive Officers The Company’s stockholders approved the compensation of the Company’s named executive officers by a non-binding advisory vote, as follows: Votes For Votes Against Votes Abstained Broker Non-Votes 1,768,695 57,111 3,185 970,538

Proposal 5 – Approval of the Amended and Restated 2021 Incentive Plan The Company’s stockholders approved the Amended and Restated 2021 Incentive Plan to increase the number of authorized shares of common stock available for issuance thereunder, as follows: Votes For Votes Against Votes Abstained Broker Non-Votes 1,131,261 680,030 17,700 970,538

Proposal 2 –Ratification of the Appointment of Grant Thornton LLP The Company’s stockholders ratified the appointment of Grant Thornton LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026, as follows: Votes For Votes Against Votes Abstained 2,781,705 13,975 3,849