JONATHAN S. LEFF - 13 May 2025 Form 4 Insider Report for Larimar Therapeutics, Inc. (LRMR)

Role: Director
Signature: /s/ Jennifer Johansson, Attorney-in-fact
Issuer symbol: LRMR
Transactions as of: 13 May 2025
Net transactions value: $0
Form type: 4
Filing time: 14 May 2025, 16:32:22 UTC
Previous filing: 21 Apr 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
LEFF JONATHAN S	Director	C/O LARIMAR THERAPEUTICS, INC., THREE BALA PLAZA EAST, SUITE 506, BALA CYNWYD	/s/ Jennifer Johansson, Attorney-in-fact	14 May 2025	0001215242

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	LRMR	Stock Option (Right to Buy)	Award	$0	+19,000		$0.000000	19,000	13 May 2025	Common Stock	19,000	$1.88	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	The Reporting Person, a partner in Deerfield Management Company, L.P., has no pecuniary interest in the securities reported herein and disclaims beneficial ownership of such securities. The Reporting Person holds the options for the benefit, and at the direction, of Deerfield Management Company, L.P.
F2	The options vest on the earlier of (a) May 13, 2026 or (b) the date of the Company's next annual meeting of stockholders, in each case subject to the Reporting Person's continued service on the Board of Directors of the Company.