Director buys 5,000 Larimar Therapeutics (LRMR) shares at $5.00

Rhea-AI Filing Summary

Larimar Therapeutics director Jeffrey W. Sherman bought 5,000 shares of the company’s common stock at $5.00 per share in an underwritten offering that closed on February 27, 2026. The transaction is reported as a direct, open-market style purchase on a Form 4 insider filing.

SEC Form 4

FORM 4

UNITED 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

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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^*

SHERMAN JEFFREY W

(Last) (First) (Middle)

C/O LARIMAR THERAPEUTICS, INC.

THREE BALA PLAZA EAST, SUITE 506

(Street)

BALA CYNWYD PA 19004

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Larimar Therapeutics, Inc. [ LRMR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
02/27/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/27/2026		P		5,000(1)	A	$5	5,000	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares of common stock purchased in the underwritten offering of Larimar Therapeutics, Inc. at the offering price, which closed on February 27, 2026.

	/s/ Jennifer Johansson, Attorney-in-fact	03/02/2026
	** Signature of Reporting Person	Date
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).
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FAQ

What insider transaction did Larimar Therapeutics (LRMR) report for Jeffrey W. Sherman?

Larimar Therapeutics reported that director Jeffrey W. Sherman bought 5,000 shares of common stock. The purchase was made at $5.00 per share in an underwritten offering that closed on February 27, 2026.

At what price did the Larimar Therapeutics director buy shares?

Director Jeffrey W. Sherman purchased Larimar Therapeutics common stock at $5.00 per share. This price reflects the offering price in the company’s underwritten stock offering, which closed on February 27, 2026, according to the Form 4 footnote.

How many Larimar Therapeutics shares does Jeffrey W. Sherman hold after this Form 4 transaction?

After this Form 4 transaction, director Jeffrey W. Sherman is reported as directly owning 5,000 shares of Larimar Therapeutics common stock. The filing shows these shares were acquired in the company’s underwritten offering that closed on February 27, 2026.

Was the Larimar Therapeutics insider purchase part of an underwritten offering?

Yes. The Form 4 footnote states the 5,000 common shares were purchased in an underwritten offering of Larimar Therapeutics at the offering price. That offering closed on February 27, 2026, and the shares are held directly by director Jeffrey W. Sherman.

Is Jeffrey W. Sherman a director or officer at Larimar Therapeutics (LRMR)?

Jeffrey W. Sherman is identified in the Form 4 as a director of Larimar Therapeutics. He is not listed as an officer in this filing and does not report ten percent owner status, but does report direct ownership of 5,000 common shares after the transaction.