ATRC AtriCure, Inc.
AtriCure, Inc. (ATRC) Institutional Ownership
What the institutions did with ATRC last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeOwnership map
Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 4.5M | 8.5% |
| WELLINGTON MANAGEMENT GROUP LLP | 3.5M | 6.6% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3.1M | 5.9% |
| Hood River Capital Management LLC | 2.9M | 5.5% |
| ALLIANCEBERNSTEIN L.P. | 2.8M | 5.2% |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.2M | 4.2% |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1.7M | 3.3% |
| GOLDMAN SACHS GROUP INC | 1.6M | 3.0% |
| STATE STREET CORP | 1.4M | 2.6% |
| MARSHALL WACE, LLP | 1.3M | 2.5% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.3M | 2.5% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.3M | 2.5% |
| DIMENSIONAL FUND ADVISORS LP | 1.0M | 2.0% |
| GW&K Investment Management, LLC | 949.5K | 1.8% |
| NEUBERGER BERMAN GROUP LLC | 948.0K | 1.8% |
| Champlain Investment Partners, LLC | 938.6K | 1.8% |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 897.4K | 1.7% |
| BANK OF AMERICA CORP /DE/ | 874.4K | 1.7% |
| KENNEDY CAPITAL MANAGEMENT LLC | 857.8K | 1.6% |
| Divisadero Street Capital Management, LP | 800.9K | 1.5% |
| Point72 Asset Management, L.P. | 604.4K | 1.1% |
| DAFNA Capital Management LLC | 597.4K | 1.1% |
| First Eagle Investment Management, LLC | 595.3K | 1.1% |
| Grandeur Peak Global Advisors, LLC | 587.4K | 1.1% |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 580.6K | 1.1% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 277.7K | 1.3M | +1.0M |
| VOYA INVESTMENT MANAGEMENT LLC | Reduced | 719.6K | 28.3K | -691.3K |
| Point72 Asset Management, L.P. | New | 0 | 604.4K | +604.4K |
| ALLIANCEBERNSTEIN L.P. | Reduced | 3.3M | 2.8M | -490.5K |
| BlackRock, Inc. | Increased | 4.0M | 4.5M | +431.9K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 2.7M | 3.1M | +424.6K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Reduced | 555.1K | 131.9K | -423.3K |
| Divisadero Street Capital Management, LP | Reduced | 1.2M | 800.9K | -359.0K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 186.4K | 544.1K | +357.7K |
| First Eagle Investment Management, LLC | Increased | 262.1K | 595.3K | +333.1K |
| MORGAN STANLEY | Reduced | 719.2K | 457.8K | -261.4K |
| HRT FINANCIAL LP | Increased | 67.1K | 299.7K | +232.7K |
| TWO SIGMA INVESTMENTS, LP | Reduced | 751.0K | 525.8K | -225.2K |
| Hood River Capital Management LLC | Reduced | 3.1M | 2.9M | -212.2K |
| Grandeur Peak Global Advisors, LLC | Increased | 381.9K | 587.4K | +205.5K |
| MILLENNIUM MANAGEMENT LLC | Sold Out | 179.9K | 0 | -179.9K |
| Meros Investment Management, LP | New | 0 | 170.0K | +170.0K |
| FMR LLC | Increased | 336.8K | 506.4K | +169.5K |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Reduced | 1.1M | 897.4K | -163.4K |
| PANAGORA ASSET MANAGEMENT INC | Increased | 227.4K | 389.1K | +161.7K |
| First Light Asset Management, LLC | Reduced | 729.5K | 567.8K | -161.7K |
| OSTERWEIS CAPITAL MANAGEMENT INC | Increased | 349.6K | 501.4K | +151.7K |
| FIRST TRUST ADVISORS LP | Reduced | 189.3K | 48.4K | -140.9K |
| Topline Capital Management, LLC | New | 0 | 138.5K | +138.5K |
| D. E. Shaw & Co., Inc. | Increased | 56.6K | 192.8K | +136.2K |
| MARSHALL WACE, LLP | Reduced | 1.5M | 1.3M | -133.6K |
| Assenagon Asset Management S.A. | New | 0 | 124.7K | +124.7K |
| Allianz Asset Management GmbH | Sold Out | 122.2K | 0 | -122.2K |
| Trexquant Investment LP | Reduced | 143.1K | 26.8K | -116.3K |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 3.4M | 3.5M | +113.0K |
| RICE HALL JAMES & ASSOCIATES, LLC | Increased | 25.2K | 134.2K | +109.0K |
| Qube Research & Technologies Ltd | Increased | 454.8K | 560.8K | +106.0K |
| BANK OF AMERICA CORP /DE/ | Increased | 768.6K | 874.4K | +105.8K |
| NEUBERGER BERMAN GROUP LLC | Reduced | 1.1M | 948.0K | -102.3K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.2M | 1.3M | +93.6K |
| CITADEL ADVISORS LLC | Increased | 87.3K | 177.3K | +90.0K |
| STATE STREET CORP | Increased | 1.3M | 1.4M | +87.8K |
| ExodusPoint Capital Management, LP | New | 0 | 86.4K | +86.4K |
| Susquehanna Portfolio Strategies, LLC | New | 0 | 80.1K | +80.1K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 308.7K | 234.1K | -74.6K |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 88.9K | 161.4K | +72.5K |
| LPL Financial LLC | Increased | 20.8K | 92.9K | +72.1K |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | Reduced | 1.8M | 1.7M | -70.6K |
| GOLDMAN SACHS GROUP INC | Reduced | 1.7M | 1.6M | -69.2K |
| Man Group plc | Reduced | 85.1K | 24.4K | -60.7K |
| Granite Investment Partners, LLC | New | 0 | 58.8K | +58.8K |
| LAZARD ASSET MANAGEMENT LLC | Sold Out | 54.0K | 0 | -54.0K |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | New | 0 | 50.5K | +50.5K |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Reduced | 150.0K | 100.0K | -50.0K |
| RAYMOND JAMES FINANCIAL INC | Increased | 216.9K | 266.1K | +49.1K |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Reduced | 97.2K | 50.6K | -46.6K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 997.8K | 1.0M | +46.3K |
| Oak Harvest Investment Services | Sold Out | 45.0K | 0 | -45.0K |
| Brevan Howard Capital Management LP | Increased | 9.5K | 54.4K | +44.9K |
| Bridgewater Associates, LP | Increased | 33.5K | 76.3K | +42.8K |
| AMERIPRISE FINANCIAL INC | Increased | 52.4K | 94.9K | +42.5K |
| Caption Management, LLC | New | 0 | 39.2K | +39.2K |
| Amundi | Increased | 225.9K | 264.9K | +38.9K |
| XTX Topco Ltd | New | 0 | 37.2K | +37.2K |
| GSA CAPITAL PARTNERS LLP | Sold Out | 36.2K | 0 | -36.2K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.