HARVARD BIOSCIENCE INC — Director's Dealing 2025

Aug 19, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: HARVARD BIOSCIENCE INC (HBIO)
CIK: 0001123494
Period of Report: 2025-08-15

Reporting Person: Green James W (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-08-15	Common Stock	D	49048	—	Disposed	2796040	Direct
2025-08-15	Common Stock	F	33200	$0.529	Disposed	2762840	Direct
2025-08-15	Common Stock	D	119332	—	Disposed	2643508	Direct
2025-08-15	Common Stock	F	11540	$0.529	Disposed	2631968	Direct
2025-08-15	Common Stock	D	66036	—	Disposed	2565905	Direct
2025-08-15	Common Stock	D	113366	—	Disposed	2452566	Direct

Footnotes

F1: Represents forfeiture of time-based restricted stock units ("RSUs") granted to the Reporting Person on March 6, 2023 in connection with the Reporting Person resigning from all services with the Issuer.

F2: The shares were disposed of to satisfy the Reporting Person's tax withholding obligation in connection with an RSU award previously granted to the Reporting Person that vested on August 15, 2025.

F3: Represents forfeiture of time-based RSUs granted to the Reporting Person on March 5, 2024 in connection with the Reporting Person resigning from all services with the Issuer.

F4: The shares were disposed of to satisfy the Reporting Person's tax withholding obligation in connection with an RSU award previously granted to the Reporting Person that vested on August 15, 2025.

F5: Represents forfeiture of performance-based RSUs granted to the Reporting Person on March 6, 2023 in connection with the Reporting Person resigning from all services with the Issuer.

F6: Represents forfeiture of performance-based RSUs granted to the Reporting Person on March 5, 2024 in connection with the Reporting Person resigning from all services with the Issuer.

F7: This total includes 375,005 RSUs with performance based vesting conditions.