DEERFIELD MANAGEMENT COMPANY, L.P. 4

4 · Larimar Therapeutics, Inc. · Filed Mar 2, 2026

AI-generated summary of this filing

Updated Mar 3, 2026

Larimar (LRMR) 10% Owner James E. Flynn Buys Stock ($25M)

What Happened

James E. Flynn, reported as a 10% owner through Deerfield-managed funds, acquired a total of 5,000,000 shares of Larimar Therapeutics (LRMR) on 2026-02-27. The purchases were made in four transactions of 1,084,010; 1,084,012; 831,978; and 2,000,000 shares, each at $5.00 per share, totaling $25,000,000. Transaction code: P (purchase). Purchases are generally viewed as a more informative (bullish) insider signal than sales, though no motive is stated.

Key Details

Transaction date: 2026-02-27; Filing date: 2026-03-02 (timely Form 4 filing).
Price and amounts: 5,000,000 shares at $5.00 each = $25,000,000 total (broken into four lots: 1,084,010; 1,084,012; 831,978; 2,000,000).
Shares owned after transaction: not specified in this Form 4 (the filing reports holdings of the Funds collectively).
Footnotes/notable parties:
- The filing is made on behalf of multiple Reporting Persons (Deerfield funds and management entities). Flynn is the sole manager of the general partners of the Deerfield entities listed (see footnotes).
- Footnote disclaims direct beneficial ownership by the Reporting Persons except for indirect pecuniary interests (institutional ownership via funds).
- Jonathan S. Leff (a Deerfield partner) serves as a director of Larimar; Jonathan Isler is listed as attorney-in-fact.
Transaction code: P = Purchase.

Context

These purchases were made by funds managed by Deerfield (institutional/10% owner activity). That means the transactions represent fund-level acquisitions under Flynn’s management rather than necessarily personal trades by Flynn.
No options, awards, gifts, or tax-withholding actions are reported here—just open-market/private purchases.

Form 4

Period: 2026-02-27

Director10% OwnerOther

Transactions

Purchase
Common Stock
[F1][F2]
2026-02-27$5.00/sh+1,084,010$5,420,050→ 10,622,928 total(indirect: Through Deerfield Private Design Fund III, L.P.)
Purchase
Common Stock
[F1][F2]
2026-02-27$5.00/sh+1,084,012$5,420,060→ 10,622,957 total(indirect: Through Deerfield Private Design Fund IV, L.P.)
Purchase
Common Stock
[F1][F2]
2026-02-27$5.00/sh+831,978$4,159,890→ 8,153,107 total(indirect: Through Deerfield Healthcare Innovations Fund, L.P.)
Purchase
Common Stock
[F1][F2]
2026-02-27$5.00/sh+2,000,000$10,000,000→ 6,207,982 total(indirect: Through Deerfield Partners, L.P.)

Footnotes (2)

[F1]This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt III, L.P. is the general partner of Deerfield Private Design Fund III, L.P. ("Fund III"). Deerfield Mgmt IV, L.P. is the general partner of Deerfield Private Design Fund IV, L.P. ("Fund IV"). Deerfield Mgmt HIF, L.P. is the general partner of Deerfield Healthcare Innovations Fund, L.P. ("Deerfield HIF"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners"). Deerfield Management Company, L.P. is the investment manager of Deerfield Partners, L.P., Fund III, Fund IV and Deerfield HIF (collectively, the "Funds"). James E. Flynn is the sole manager of the general partner of each of Deerfield Mgmt III, L.P., Deerfield Mgmt IV, L.P., Deerfield Mgmt HIF, L.P., Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.
[F2]In accordance with Instruction 4 (b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Signature

/s/ Jonathan Isler, Attorney-in-Fact|2026-03-02

2 files