Initial Statement of Beneficial Ownership (Form 3)

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Snider William 2. Date of Event Requiring Statement (Month/Day/Year) 12/17/2025 3. Issuer Name and Ticker or Trading Symbol HARVARD BIOSCIENCE INC [HBIO] (Last) (First) (Middle) C/O HARVARD BIOSCIENCE, INC., 84 OCTOBER HILL ROAD 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed (Month/Day/Year) (Street) HOLLISTON, MA 01746 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Warrant (right to buy)	(3)	12/17/2032	Common Stock	150,000	$0.5	I	As manager(1)
Warrant (right to buy)	(3)	12/17/2032	Common Stock	600,000	$0.5	I	As manager(2)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Snider William C/O HARVARD BIOSCIENCE, INC. 84 OCTOBER HILL ROAD HOLLISTON, MA 01746	X

Signatures

/s/ William Snider		12/30/2025
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Held by BroadOak Fund VI, L.P. The reporting person is the Manager of BroadOak Fund VI, L.P. The reporting person disclaims beneficial ownership of the securities held by BroadOak Fund VI, L.P except to the extent of his pecuniary interest therein, if any.
(2)	Held by BroadOak Income Fund, L.P. The reporting person is the Manager of BroadOak Income Fund, L.P. The reporting person disclaims beneficial ownership of the securities held by BroadOak Income Fund, L.P except to the extent of his pecuniary interest therein, if any.
(3)	The Warrants are exercisable immediately. Notwithstanding the foregoing, the Reporting Person shall not be entitled to exercise the Warrants to the extent that such exercise would cause the aggregate number of shares of common stock of the Issuer, $0.01 par value per share (the "Common Stock"), beneficially owned by the Reporting Person to exceed 19.99% of the total number of outstanding shares of Common Stock following such exercise.
Remarks: Exhibit 24 - Power of Attorney

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