Larimar Therapeutics, Inc.
LRMR- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001374690
In the last 90 days, Larimar Therapeutics, Inc. insiders filed 1 open-market purchase and 0 sales; 163 institutions reported holding it in 13F filings for Q2 2026, worth $292.7M in total; no superinvestor holds it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Larimar Therapeutics, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 1 filing
- 1 insider, $166.9K in total
- Open-market sells
- 0 filings
- Insiders trading
- 1
- Net value
- +$166.9K
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Larimar Therapeutics, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Hamilton Thomas Edward | Director | 714,798 | Jul 8, 2026 | 3 |
| Deerfield Management Company, L.P. | Director, 10% Owner, Other: * Director by Deputization | 6,207,982Indirect | May 20, 2026 | 2 |
| Flynn James E | Director, 10% Owner, Other: * Director by Deputization | 6,207,982Indirect | May 20, 2026 | 2 |
| Leff Jonathan S | Director | – | May 20, 2026 | 1 |
| Sherman Jeffrey W | Director | 5,000 | May 20, 2026 | 2 |
| Thomas Frank E | Director | 7,000 | May 20, 2026 | 2 |
| Truitt Joseph | Director | 2,750 | May 20, 2026 | 1 |
| Deerfield Mgmt L.P. | Director, 10% Owner, Other: * Director by Deputization | 6,207,982Indirect | Mar 2, 2026 | 1 |
| Deerfield Partners, L.P. | Director, 10% Owner, Other: * Director by Deputization | 6,207,982Indirect | Mar 2, 2026 | 1 |
| Deerfield Private Design Fund III, L.P. | Director, 10% Owner, Other: * Director by Deputization | 6,207,982Indirect | Mar 2, 2026 | 1 |
| Deerfield Mgmt III, L.P. | Director, 10% Owner, Other: * Director by Deputization | 6,207,982Indirect | Mar 2, 2026 | 1 |
| Deerfield Healthcare Innovations Fund, L.P. | Director, 10% Owner, Other: * Director by Deputization | 6,207,982Indirect | Mar 2, 2026 | 1 |
| Deerfield Mgmt HIF, L.P. | Director, 10% Owner, Other: * Director by Deputization | 6,207,982Indirect | Mar 2, 2026 | 1 |
| Deerfield Private Design Fund IV, L.P. | Director, 10% Owner, Other: * Director by Deputization | 6,207,982Indirect | Mar 2, 2026 | 1 |
| Deerfield Mgmt IV, L.P. | Director, 10% Owner, Other: * Director by Deputization | 6,207,982Indirect | Mar 2, 2026 | 1 |
| Celano Michael | Chief Financial Officer | 215,785 | Jan 27, 2026 | 1 |
| Ben-Maimon Carole | President and CEO | 368,276 | Jan 27, 2026 | 1 |
| Clayton Russell | Chief Medical Officer | 71,443 | Jan 27, 2026 | 1 |
| Shankar Gopi | Chief Development Officer | 76,443 | Jan 27, 2026 | 1 |
| Barrett Peter | Director | – | May 12, 2022 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Jul 8, 2026 (view filing)4:05 PM ET | Jul 6 | 2 days | Hamilton Thomas EdwardDirector | PPurchase | +50.0K | $3.34 | +$166.9K | +7.5%714.8K after | |
| Mar 2, 2026 (view filing)7:46 PM ET | Feb 27 | 3 days | Deerfield Management Company, L.P. and 9 othersDirector, 10% Owner, Other: * Director by Deputization | PPurchase | +5.00M | $5.00 | +$25.0M | +413.9%6.21M after | 4 lots |
| Mar 2, 2026 (view filing) | Feb 27 | 3 days | Hamilton Thomas EdwardDirector | PPurchase | +100.0K | $5.00 | +$500.0K | +17.7%664.8K after | |
| Mar 2, 2026 (view filing) | Feb 27 | 3 days | Thomas Frank EDirector | PPurchase | +5.00K | $5.00 | +$25.0K | +250.0%7.00K after | |
| Mar 2, 2026 (view filing) | Feb 27 | 3 days | Sherman Jeffrey WDirector | PPurchase | +5.00K | $5.00 | +$25.0K | New position5.00K after | |
| Aug 4, 2025 (view filing)6:28 PM ET | Jul 31 | 4 days | Deerfield Management Company, L.P. and 9 othersDirector, 10% Owner, Other: * Director by Deputization | PPurchase | +9.38M | $3.20 | +$30.0M | New position7.32M after | 3 lots |
| May 31, 2024 (view filing) | Feb 16 | 105 daysLate | Hamilton Thomas EdwardDirector | PPurchase | +57.2K | $8.74 | +$500.0K | +11.3%564.8K after | |
| Feb 16, 2024 (view filing)2:37 PM ET | Feb 16 | Same day | Deerfield Management Company, L.P. and 9 othersDirector, 10% Owner, Other: * Director by Deputization | PPurchase | +4.29M | $8.74 | +$37.5M | New position4.21M after | 3 lots |
| Feb 15, 2024 (view filing) | Feb 14 | 1 day | Thomas Frank EDirector | PPurchase | +2.00K | $11.00 | +$22.0K | New position2.00K after | |
| Dec 8, 2023 (view filing) | Dec 7 | 1 day | Shankar GopiChief Development Officer | PPurchase | +5.00K | $3.73 | +$18.6K | New position5.00K after | |
| May 18, 2023 (view filing) | May 17 | 1 day | Celano MichaelChief Financial Officer | PPurchase | +5.00K | $3.73 | +$18.6K | +4.6%112.7K after | |
| May 18, 2023 (view filing) | May 17 | 1 day | Ben-Maimon CarolePresident and CEO | PPurchase | +5.00K | $3.71 | +$18.6K | +1.9%266.8K after | |
| May 18, 2023 (view filing) | May 17 | 1 day | Truitt JosephDirector | PPurchase | +2.75K | $3.73 | +$10.3K | New position2.75K after | |
| Sep 20, 2022 (view filing)8:31 PM ET | Sep 16 | 4 days | Deerfield Management Company, L.P. and 7 othersDirector, 10% Owner, Other: * Director by Deputization | PPurchase | +11.1M | $3.15 | +$35.0M | New position2.78M after | 4 lots |
| Sep 20, 2022 (view filing) | Sep 16 | 4 days | Hamilton Thomas EdwardDirector | PPurchase | +317.5K | $3.15 | +$1.00M | +167.0%507.6K after | |
| Sep 19, 2022 (view filing) | Sep 16 | 3 days | Celano MichaelChief Financial Officer | PPurchase | +31.7K | $3.15 | +$100.0K | New position31.7K after | |
| Sep 19, 2022 (view filing) | Sep 16 | 3 days | Ben-Maimon CarolePresident and CEO | PPurchase | +31.7K | $3.15 | +$100.0K | +126.6%56.8K after | |
| Jul 2, 2021 (view filing)5:07 PM ET | Jun 30 | 2 days | Deerfield Management Company, L.P. and 7 othersDirector, 10% Owner, Other: * Director by Deputization | PPurchase | +685.7K | $8.75 | +$6.00M | +54.5%1.94M after | 3 lots |
| Jul 2, 2021 (view filing) | Jun 30 | 2 days | Hamilton Thomas EdwardDirector | PPurchase | +56.7K | $8.75 | +$496.2K | +42.5%190.1K after |