AtriCure, Inc. (ATRC) ownership: Top institutional holder: VANGUARD GROUP INC ($193.99M). Insider activity: Net Seller (0 buys, 20 sells). 4 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 4903755.00 | $193.99M | 2025-12-31 |
| ALLIANCEBERNSTEIN L.P. | 3258872.00 | $128.92M | 2026-03-31 |
| BlackRock, Inc. | 4042681.00 | $115.34M | 2026-03-31 |
| WELLINGTON MANAGEMENT GROUP LLP | 3382555.00 | $96.50M | 2026-03-31 |
| Hood River Capital Management LLC | 3117545.00 | $88.94M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2702632.00 | $77.11M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2155764.00 | $61.50M | 2026-03-31 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1804927.00 | $51.49M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.