Aclaris Therapeutics Inc
Ownership
Ownership Structure
Who owns Aclaris Therapeutics Inc (ACRS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 74.7% of the shares are freely tradable; institutional investors hold 79.7%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BML Capital Management LLC | 8.14 | 11,975,000 | -16.0 | 06/30/2026 |
| Deep Track Capital, LP | 6.35 | 9,345,000 | +0.0 | 06/30/2026 |
| BlackRock Inc | 5.03 | 7,407,065 | +8.8 | 03/31/2026 |
| RA Capital Management, LLC | 4.62 | 6,804,072 | +0.0 | 03/31/2026 |
| Vivo Capital, LLC | 4.55 | 6,694,637 | +0.4 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.51 | 5,167,469 | +0.0 | 03/31/2026 |
| Frazier Life Sciences Management, L.P. | 3.35 | 4,925,374 | +0.0 | 03/31/2026 |
| Rock Springs Capital Management LP | 2.94 | 4,330,532 | -3.2 | 06/30/2026 |
| Adage Capital Partners Gp LLC | 2.77 | 4,071,000 | +5.2 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.88 | 4,243,349 | +0.0 | 07/31/2026 |
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 |
|---|---|---|---|---|---|
| Kolbeck Roland Wilhelm | Chief Scientific Officer | 23,990 | 129,546 $ | Aug 1, 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 |
|---|---|---|---|---|---|---|
| Aug 1, 2026 | Kolbeck Roland Wilhelm | Chief Scientific Officer | Other | 12,385 | 5.20 | 64,402 |
| Aug 1, 2026 | Kolbeck Roland Wilhelm | Chief Scientific Officer | Other | 36,375 | – | – |
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: September 17, 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.