Larimar Therapeutics Inc
Ownership
Ownership Structure
Who owns Larimar Therapeutics Inc (LRMR)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 55.7% of the shares are freely tradable; institutional investors hold 85.7%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Deerfield Management Co | 34.28 | 35,606,974 | +0.0 | 06/30/2026 |
| Blue Owl Capital Holdings LP | 8.82 | 9,163,157 | +28.7 | 06/30/2026 |
| BlackRock Inc | 5.47 | 5,678,035 | +51.3 | 06/30/2026 |
| Defilade Capital Management, L.P. | 3.53 | 3,670,135 | +0.0 | 06/30/2026 |
| Driehaus Capital Management LLC | 3.05 | 3,163,423 | +7.8 | 06/30/2026 |
| Vanguard Capital Management, LLC | 2.86 | 2,974,901 | +3.8 | 06/30/2026 |
| RTW INVESTMENTS, LLC | 2.47 | 2,565,999 | +71.1 | 06/30/2026 |
| AQR Capital Management LLC | 2.28 | 2,371,414 | +190.1 | 06/30/2026 |
| Marshall Wace Asset Management Ltd | 1.94 | 2,012,458 | +115.6 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.12 | 2,206,446 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Hamilton Thomas Edward | Director | 714,798 | 1,786,995 $ | Jul 6, 2026 | direct |
| Harlow John B. Jr. | President and COO | 50,000 | 125,000 $ | Sep 29, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 29, 2026 | Harlow John B. Jr. | President and COO | Other | 50,000 | 0.00 | – |
| Jul 6, 2026 | Hamilton Thomas Edward | Director | Buy | 50,000 | 3.34 | 166,890 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 3, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.