Larimar Therapeutics, Inc. (LRMR)
Nasdaq: LRMR · Pharmaceutical Preparations · Bala Cynwyd, PA · filing with the SEC since 2006
Who owns Larimar Therapeutics, Inc.
As filed with the SECHolders of 5% or more
2
Deerfield Management Company, L.P. holds 34.4% of Common Stock, par value $0.01 per share, as its SCHEDULE 13D/A filed Mar 2, 2026 says.
Directors and officers
20
report now, of 36 people on the record since 2014. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Deerfield Management Company, L.P.
SCHEDULE 13D/A · filed Mar 2, 2026 · Common Stock, par value $0.01 per share · 35.8% in Jul 31, 2025
Blue Owl Capital Holdings LP
SCHEDULE 13G/A · filed May 14, 2026 · Common Stock, par value $0.001 per share · 9.99% in Feb 12, 2026
Opaleye Management, Inc.
SCHEDULE 13G · filed Aug 29, 2025 · Common Stock · reported falling below 5%, from 6.17% in Apr 16, 2025
Blackrock, Inc.
SCHEDULE 13G/A · filed Apr 22, 2025 · Common Stock · reported falling below 5%, from 5.1% in Feb 4, 2025
Goldman Sachs Group Inc.
SCHEDULE 13G/A · filed May 13, 2025 · Common Stock, par value $.001 per share · reported falling below 5%
Millennium Management LLC
SCHEDULE 13G/A · filed Apr 30, 2026 · Common Stock, par value $0.001 per share · reported falling below 5%, from 5.8% in Nov 6, 2025
RA Capital Management, L.P.
SCHEDULE 13G/A · filed Feb 17, 2026 · Common Stock, par value $0.001 per share · reported falling below 5%
Janus Henderson Group PLC
SCHEDULE 13G/A · filed Aug 14, 2025 · Common Stock · reported falling below 5%, from 9.1% in May 14, 2025
What LRMR reports owning in othersstakes of 5% or more, and other ties
1 subsidiary in 1 country, from the list filed with the 10-K filed Mar 19, 2026.
Insider tradesForm 4
0sales
15purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$26.1Mbought, in dollars
Open-market trades on Form 4 from Nov 12, 2025 to Nov 12, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 12, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window9 of 42 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Deerfield Mgmt Hif, L.P. | director | 0 | $0 | 0 | 4 | $25.0M |
| Hamilton Thomas Edward | director | 0 | $0 | 0 | 3 | $900,000 |
| Thomas Frank E | director | 0 | $0 | 0 | 2 | $0 |
| Ben-Maimon Carole | President and CEO | 0 | $0 | 0 | 1 | $0 |
| Harlow John B. Jr. | President and COO | 0 | $0 | 0 | 1 | $0 |
| Celano Michael | Chief Financial Officer | 0 | $0 | 0 | 1 | $0 |
| Shankar Gopi | Chief Development Officer | 0 | $0 | 0 | 1 | $0 |
| Truitt Joseph | director | 0 | $0 | 0 | 1 | $0 |
| Sherman Jeffrey W | director | 0 | $0 | 0 | 1 | $0 |