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Director at Harvard Bioscience (HBIO) awarded 16,556 RSUs

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Benson Seth Benjamin reported acquisition or exercise transactions in this Form 4 filing.

Harvard Bioscience director Seth Benjamin Benson received a grant of 16,556 restricted stock units of common stock, awarded at a price of $0.0000 per share. This equity award will vest in full immediately before the company’s next annual meeting or one year from the grant date, whichever comes first.

After this grant, Benson directly holds 27,556 shares of common stock, including the new award and 11,000 shares already beneficially owned. The filing also notes a 10-for-1 reverse stock split of Harvard Bioscience common stock that occurred on March 13, 2026, which adjusted previously reported award amounts.

Positive

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Insider Benson Seth Benjamin
Role null
Type Security Shares Price Value
Grant/Award Common Stock 16,556 $0.00 --
Holdings After Transaction: Common Stock — 27,556 shares (Direct, null)
Footnotes (1)
  1. Represents an award of 16,556 restricted stock units that vests in full (i) immediately prior to the Company's next annual meeting; or (ii) one year from the date of grant, whichever is earlier. Includes (a) the award described in footnote (1) above and (b) 11,000 shares of common stock beneficially owned by the Reporting Person. On March 13, 2026, the common stock of Harvard Bioscience, Inc. underwent a reverse stock split in a ratio of 10-for-1. The 11,000 shares referenced in Footnote 2(b) were previously reported as covering 110,000 restricted stock units (which have now vested) and are beneficially owned by the Reporting Person. These numbers have been adjusted to reflect the stock split that occurred on March 13, 2026.
RSU award size 16,556 restricted stock units Equity grant to director on June 9, 2026
Grant price per share $0.0000 per share Restricted stock unit award to director
Total shares after transaction 27,556 shares Director’s direct holdings following the grant
Previously beneficially owned shares 11,000 shares Shares beneficially owned by the reporting person
Reverse stock split ratio 10-for-1 Common stock reverse split on March 13, 2026
Reverse split date March 13, 2026 Effective date of 10-for-1 reverse split
restricted stock units financial
"Represents an award of 16,556 restricted stock units that vests in full"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
reverse stock split financial
"the common stock of Harvard Bioscience, Inc. underwent a reverse stock split in a ratio of 10-for-1"
A reverse stock split is when a company reduces the number of its shares outstanding, making each share more valuable. For example, if you own 100 shares worth $1 each, a 1-for-10 reverse split would turn your 100 shares into 10 shares worth $10 each. Companies often do this to boost their stock price and appear more stable to investors.
beneficially owned financial
"11,000 shares of common stock beneficially owned by the Reporting Person"
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
common stock financial
"The 11,000 shares referenced in Footnote 2(b) were previously reported"
Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.
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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Benson Seth Benjamin

(Last)(First)(Middle)
C/O HARVARD BIOSCIENCE, INC.
84 OCTOBER HILL ROAD

(Street)
HOLLISTON MASSACHUSETTS

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
HARVARD BIOSCIENCE INC [ HBIO ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/09/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock06/09/2026A16,556(1)A$0.0027,556(2)(3)D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Represents an award of 16,556 restricted stock units that vests in full (i) immediately prior to the Company's next annual meeting; or (ii) one year from the date of grant, whichever is earlier.
2. Includes (a) the award described in footnote (1) above and (b) 11,000 shares of common stock beneficially owned by the Reporting Person.
3. On March 13, 2026, the common stock of Harvard Bioscience, Inc. underwent a reverse stock split in a ratio of 10-for-1. The 11,000 shares referenced in Footnote 2(b) were previously reported as covering 110,000 restricted stock units (which have now vested) and are beneficially owned by the Reporting Person. These numbers have been adjusted to reflect the stock split that occurred on March 13, 2026.
/s/ Seth Benson06/11/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Harvard Bioscience (HBIO) report for Seth Benjamin Benson?

Harvard Bioscience reported that director Seth Benjamin Benson received 16,556 restricted stock units of common stock as an equity award. The grant, priced at $0.0000 per share, is a compensation-related acquisition rather than an open-market stock purchase or sale.

When do the 16,556 restricted stock units granted to the HBIO director vest?

The 16,556 restricted stock units vest in full either immediately before Harvard Bioscience’s next annual meeting or one year from the grant date, whichever occurs earlier. This creates a single vesting event tied to the company’s governance calendar and the original grant timing.

How many Harvard Bioscience (HBIO) shares does the director hold after this Form 4 transaction?

Following the grant, Seth Benjamin Benson directly holds 27,556 shares of Harvard Bioscience common stock. This total includes the 16,556-share restricted stock unit award and 11,000 shares already beneficially owned, as clarified in the Form 4 footnotes.

What reverse stock split did Harvard Bioscience (HBIO) disclose in this Form 4?

The Form 4 notes that on March 13, 2026, Harvard Bioscience common stock underwent a 10-for-1 reverse stock split. A previously reported 110,000 restricted stock units now correspond to 11,000 shares beneficially owned, with all figures adjusted to reflect the split.

Is the Harvard Bioscience (HBIO) director’s transaction an open-market trade?

No, the transaction is classified as a grant or award acquisition, not an open-market trade. The director received 16,556 restricted stock units at $0.0000 per share as part of compensation, rather than buying or selling shares on the open market.