Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in ATRC held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 4.5M | $125.2M | +10.7% | 8.797% | 0.00% |
| 2 | WELLINGTON MANAGEMENT GROUP LLP | 3.5M | $97.8M | +3.3% | 6.872% | 0.02% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 3.1M | $87.5M | +15.7% | 6.148% | 0.00% |
| 4 | Hood River Capital Management LLC | 2.9M | $81.3M | -6.8% | 5.712% | 0.59% |
| 5 | ALLIANCEBERNSTEIN L.P. | 2.8M | $79.0M | -15.0% | 5.442% | 0.03% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 2.2M | $61.3M | +1.6% | 4.306% | 0.00% |
| 7 | NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1.7M | $48.5M | -3.9% | 3.409% | 0.07% |
| 8 | GOLDMAN SACHS GROUP INC | 1.6M | $44.7M | -4.2% | 3.141% | 0.00% |
| 9 | STATE STREET CORP | 1.4M | $38.9M | +6.7% | 2.733% | 0.00% |
| 10 | MARSHALL WACE, LLP | 1.3M | $37.3M | -9.1% | 2.622% | 0.03% |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | 1.3M | $36.9M | +7.6% | 2.594% | 0.00% |
| 12 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.3M | $36.3M | +366.8% | 2.548% | 0.02% |
| 13 | DIMENSIONAL FUND ADVISORS LP | 1.0M | $29.2M | +4.6% | 2.053% | 0.01% |
| 14 | Neuberger Berman Group LLC | 948K | $26.6M | -9.7% | 1.864% | 0.01% |
| 15 | Champlain Investment Partners, LLC | 939K | $26.3M | -3.4% | 1.845% | 0.67% |
| 16 | BNP Paribas Asset Management Holding S.A. | 897K | $25.1M | -15.4% | 1.764% | 0.03% |
| 17 | BANK OF AMERICA CORP /DE/ | 874K | $24.5M | +13.8% | 1.719% | 0.00% |
| 18 | KENNEDY CAPITAL MANAGEMENT LLC | 858K | $24.0M | +2.8% | 1.686% | 0.42% |
| 19 | Divisadero Street Capital Management, LP | 801K | $22.4M | -30.9% | 1.575% | 0.51% |
| 20 | Point72 Asset Management, L.P. | 604K | $16.9M | — | 1.188% | 0.02% |
| 21 | DAFNA Capital Management LLC | 597K | $16.7M | 0.0% | 1.175% | 3.19% |
| 22 | Grandeur Peak Global Advisors, LLC | 587K | $16.4M | +53.8% | 1.155% | 1.90% |
| 23 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 581K | $16.2M | -0.8% | 1.141% | 0.01% |
| 24 | First Light Asset Management, LLC | 568K | $15.9M | -22.2% | 1.116% | 0.97% |
| 25 | Qube Research & Technologies Ltd | 561K | $15.7M | +23.3% | 1.103% | 0.01% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ATRC — a direct measure of their conviction.
Filings activity in ATRC during Q2 2026, grouped by how each filer changed its position.
Institutions that opened a new ATRC position in Q2 2026
Institutions that fully closed their ATRC position in Q2 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 252 | +14% | 103.35% | +4.59 pp | $1.43B | +0.3% |
| Q1 2026 | 222 | 5.1% | 98.76% | +0.83 pp | $1.42B | 22% |
| Q4 2025 | 234 | +6.8% | 97.93% | +1.05 pp | $1.83B | +13% |
| Q3 2025 | 219 | +9.0% | 96.88% | 1.62 pp | $1.62B | +6.5% |
| Q2 2025 | 201 | 8.2% | 98.50% | 2.50 pp | $1.52B | 6.2% |
| Q1 2025 | 219 | +3.8% | 101.00% | +6.34 pp | $1.62B | +20% |
| Q4 2024 | 211 | +7.1% | 94.66% | 5.89 pp | $1.35B | +2.7% |
| Q3 2024 | 197 | — | 100.55% | — | $1.31B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ATRC stock.
Based on Q2 2026 13F filings, institutional ownership of AtriCure, Inc. stands at 103.4%, held across 252 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of ATRC, with approximately 4,474,548 shares worth $0.13B as of Q2 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of ATRC, including Point72 Asset Management, L.P..
Our composite Smart Money Score for ATRC is 68 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
50 institutions opened new positions in ATRC during Q2 2026, while 24 fully exited. 94 added to existing positions and 98 trimmed.
ATRC institutional ownership rose by 4.59 percentage points quarter-over-quarter, with a net change of +30 holders.
The top 10 institutions account for 49.2% of all reported 13F value in ATRC, and the top 25 account for 73.7%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
AtriCure, Inc. (ATRC) Institutional Ownership