AtriCure Inc (ATRC)
Who owns AtriCure Inc (ATRC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 95.9% of the shares are freely tradable; institutional investors hold 102.4%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Group Inc | 9.68 | 4,903,755 | +1.3 | 12/31/2025 |
| BlackRock Inc | 7.98 | 4,042,681 | -0.6 | 03/31/2026 |
| Wellington Management Company LLP | 6.68 | 3,382,555 | -13.7 | 03/31/2026 |
| AllianceBernstein L.P. | 6.44 | 3,258,872 | -8.6 | 03/31/2026 |
| Hood River Capital Management LLC | 6.16 | 3,117,545 | +0.7 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 5.34 | 2,702,632 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.26 | 2,155,764 | +0.0 | 03/31/2026 |
| Delaware Management Holdings Inc | 3.56 | 1,804,927 | -11.5 | 03/31/2026 |
| The Goldman Sachs Group Inc | 3.29 | 1,667,166 | +88.4 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Hood River Small-Cap Growth Instl | 3.23 | 1,637,849 | +0.0 | 03/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 29. Jul 2026 | Noznesky Justin J | Chief Mktg & Strategy Officer | Sell | 6,182 | 38.80 | 239,862 |
| 28. Jul 2026 | Doraiswamy Vinayak | Chief Scientific Officer | Sell | 6,000 | 38.88 | 233,280 |
| 28. Jul 2026 | Wehrwein Sven | Director | Sell | 25,000 | 37.84 | 946,000 |
| 28. Jul 2026 | Wehrwein Sven | Director | Other | 25,000 | 19.95 | 498,750 |
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: July 31, 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.