Frost Mark T. - 12 May 2025 Form 4 Insider Report for HARVARD BIOSCIENCE INC (HBIO)

Role: Interim CFO
Signature: /s/ John Fry, by power of attorney
Issuer symbol: HBIO
Transactions as of: 12 May 2025
Net transactions value: $0
Form type: 4
Filing time: 14 May 2025, 15:52:18 UTC
Previous filing: 22 Apr 2024
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Frost Mark T	Interim CFO	C/O HARVARD BIOSCIENCE, INC., 84 OCTOBER HILL ROAD, HOLLISTON	/s/ John Fry, by power of attorney	14 May 2025	0001310262

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	HBIO	Common Stock	Award	$0	+100,000	+400%	$0.000000	125,000	12 May 2025	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents 100,000 restricted stock units that will vest on May 12, 2026.
F2	Includes (a) 100,000 restricted stock units that will vest on May 12, 2026, and (b) 25,000 shares of common stock beneficially owned by the Reporting Person.