Larimar Therapeutics, Inc. Insider Trading Activity
Every SEC Form 4 insider transaction reported for Larimar Therapeutics, Inc. (LRMR), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are LRMR insiders buying or selling?
In the last 12 months, Larimar Therapeutics, Inc. insiders reported 5 open-market purchases ($25.7M) and 0 sales ($0) — net buying of $25.7M. Since March 2018, Trabud has recorded 21 Form 4 filings for LRMR: 19 buys ($136.5M) and 2 sells ($370.0K).
Source: SEC EDGAR Form 4
Key Statistics (March 2018 – Jul 8, 2026)
Total Form 4 filings
21
SEC EDGAR
Insider filers
9
Insider buys (19)
$136.5M
Insider sells (2)
$370.0K
Insider sentiment
Net buyingNet insider flow of $136.1M in net buying since March 2018, and $25.7M in net buying over the last 12 months.
Recent LRMR insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Jul 8, 2026 | Thomas Edward Hamilton | Director | Purchase | 50.0K | $3.34 | $166.9K | SEC ↗ |
| Mar 3, 2026 | James E Flynn | Director, 10% Owner | Purchase | 5.0M | $5.00 | $25.0M | SEC ↗ |
| Mar 2, 2026 | Thomas Edward Hamilton | Director | Purchase | 100.0K | $5.00 | $500.0K | SEC ↗ |
| Mar 2, 2026 | Frank E Thomas | Director | Purchase | 5.0K | $5.00 | $25.0K | SEC ↗ |
| Mar 2, 2026 | Jeffrey W Sherman | Director | Purchase | 5.0K | $5.00 | $25.0K | SEC ↗ |
| Aug 4, 2025 | Flynn James E | Director, 10% Owner | Purchase | 9.4M | $3.20 | $30.0M | SEC ↗ |
| May 31, 2024 | Thomas Edward Hamilton | Director | Purchase | 57.2K | $8.74 | $500.0K | SEC ↗ |
| Feb 16, 2024 | Flynn James E | Director, 10% Owner | Purchase | 4.3M | $8.74 | $37.5M | SEC ↗ |
| Feb 15, 2024 | Frank E Thomas | Director | Purchase | 2.0K | $11.00 | $22.0K | SEC ↗ |
| Dec 8, 2023 | Gopi Shankar | Chief Development Officer | Purchase | 5.0K | $3.73 | $18.7K | SEC ↗ |
| May 18, 2023 | Michael Celano | Chief Financial Officer | Purchase | 5.0K | $3.73 | $18.6K | SEC ↗ |
| May 18, 2023 | Carole Ben-Maimon | President and CEO | Purchase | 5.0K | $3.71 | $18.5K | SEC ↗ |
| May 18, 2023 | Joseph Truitt | Director | Purchase | 2.8K | $3.73 | $10.3K | SEC ↗ |
| Sep 21, 2022 | Flynn James E | Director, 10% Owner | Purchase | 11.1M | $3.15 | $35.0M | SEC ↗ |
| Sep 20, 2022 | Thomas Edward Hamilton | Director | Purchase | 317.5K | $3.15 | $1000.0K | SEC ↗ |
| Sep 19, 2022 | Michael Celano | Chief Financial Officer | Purchase | 31.7K | $3.15 | $100.0K | SEC ↗ |
| Sep 19, 2022 | Carole Ben-Maimon | President and CEO | Purchase | 31.7K | $3.15 | $100.0K | SEC ↗ |
| Jul 2, 2021 | Flynn James E | Director, 10% Owner | Purchase | 685.7K | $8.75 | $6.0M | SEC ↗ |
| Jul 2, 2021 | Thomas Edward Hamilton | Director | Purchase | 56.7K | $8.75 | $496.2K | SEC ↗ |
| Jun 29, 2018 | Thomas E. Hughes | President and Chief Scientific Officer | Sale | 32.0K | $10.00 | $320.0K | SEC ↗ |
| Mar 9, 2018 | Thomas E. Hughes | President and Chief Scientific Officer | Sale | 5.0K | $10.00 | $50.0K | SEC ↗ |
Showing the 21 most recent of 21 Form 4 filings for Larimar Therapeutics, Inc..
Most active LRMR insiders
- Flynn James E5 filings
- Thomas Edward Hamilton5 filings
- Carole Ben-Maimon2 filings
- Frank E Thomas2 filings
- Michael Celano2 filings
Ask anything about LRMR insider activity
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Open the AI agentLRMR insider trading FAQ
Are Larimar Therapeutics, Inc. insiders buying or selling?
In the last 12 months, Larimar Therapeutics, Inc. insiders reported 5 open-market purchases ($25.7M) and 0 sales ($0) — net buying of $25.7M. Since March 2018, Trabud has recorded 21 Form 4 filings for LRMR: 19 buys ($136.5M) and 2 sells ($370.0K). Over the full record that is net buying of $136.1M.
How many insiders trade LRMR stock?
9 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for Larimar Therapeutics, Inc.. The most recent filing was accepted on Jul 8, 2026.
Where does Trabud get LRMR insider trading data?
All LRMR insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.