Security record · archived quarter
ATRC
AtriCure, Inc. · Healthcare · Medical - Instruments & Supplies
100Tracked holders
+5Δ holders
35.01MShares held
$1.03BReported value
+10New positions
−6Exits
Momentum inputs (comparable managers):
holder breadth +5.3% ·
share flow +5.5% ·
net new positions +4.0%
· formula
Broad accumulation: rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 1 | -1 | 18.02K | $654,370 | n/a | −1 |
| Q2 2026 | 99 | +3 | 35.69M | $1.00B | +9 | −7 |
| Q1 2026 | 100 | +5 | 35.01M | $1.03B | +10 | −6 |
| Q4 2025 | 96 | +1 | 36.16M | $1.43B | +2 | n/a |
| Q3 2025 | 17 | -1 | 19.38M | $683.04M | n/a | −2 |
| Q2 2025 | 16 | -1 | 18.32M | $600.37M | n/a | −1 |
| Q1 2025 | 14 | 0 | 6.98M | $225.02M | +1 | −1 |
| Q4 2024 | 14 | +1 | 5.72M | $174.87M | +2 | −1 |
| Q3 2024 | 12 | -1 | 4.89M | $137.07M | n/a | −1 |
| Q2 2024 | 13 | n/a | 5.61M | $127.65M | n/a | n/a |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Alliancebernstein L.P. | 3.26M | -8.6% | $128.92M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 4.04M | -0.6% | $115.34M | 0.0% | ▼ Trim | 4 | SEC ↗ ×15 |
| 3 | Wellington Management ✦ | 3.38M | -13.7% | $96.50M | 0.0% | ▼ Trim | 8 | SEC ↗ ×6 |
| 4 | Vanguard Capital Management Llc | 2.16M | n/a | $61.50M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | Nomura Asset Management… | 1.80M | -11.5% | $51.49M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 6 | Goldman Sachs Group ✦ | 1.67M | +88.4% | $47.56M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 7 | Marshall Wace ✦ | 1.47M | +60.7% | $41.87M | 0.0% | ▲ Add | 8 | SEC ↗ ×4 |
| 8 | State Street Global Advisors ✦ (passive) | 1.30M | +4.8% | $37.15M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 9 | Geode Capital Management ✦ (passive) | 1.23M | +2.9% | $34.99M | 0.0% | ▲ Add | 8 | SEC ↗ ×2 |
| 10 | BNP Paribas Asset Management… | 1.06M | +10.6% | $30.26M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 11 | Neuberger Berman Group LLC | 1.05M | -3.3% | $29.95M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 12 | Dimensional Fund Advisors Lp | 997.76K | +8.2% | $28.47M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 13 | Bank Of America Corp /De/ | 768.56K | +13.7% | $21.93M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 14 | Two Sigma Investments ✦ | 751.00K | +97.4% | $21.43M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 15 | Voya Investment Management Llc | 719.65K | +1.0% | $20.53M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 16 | Morgan Stanley ✦ | 719.16K | +107.8% | $20.52M | 0.0% | ▲ Add | 3 | SEC ↗ ×8 |
| 17 | Massachusetts Financial Services Co… | 585.35K | +14.5% | $16.70M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 18 | UBS AM, a distinct business unit of… | 555.11K | -2.6% | $15.84M | 0.0% | ▼ Trim | 2 | SEC ↗ ×8 |
| 19 | Qube Research & Technologies Ltd | 454.79K | +56.5% | $12.98M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 20 | Northern Trust Corp | 449.60K | +2.6% | $12.83M | 0.0% | ▲ Add | 2 | SEC ↗ ×6 |
| 21 | Charles Schwab Investment… | 429.83K | -1.8% | $12.26M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 22 | Wcm Investment Management, Llc | 359.76K | -3.5% | $10.17M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 23 | Connor, Clark & Lunn Investment… | 345.39K | -8.8% | $9.85M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 24 | Fidelity (FMR) ✦ | 336.81K | +17.9% | $9.61M | 0.0% | ▲ Add | 4 | SEC ↗ ×3 |
| 25 | Nuveen, LLC | 336.73K | +0.1% | $9.61M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 26 | Renaissance Technologies ✦ | 308.70K | -4.1% | $8.81M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 27 | Arrowstreet Capital ✦ | 277.68K | New | $7.92M | 0.0% | New | 1 | SEC ↗ |
| 28 | First Eagle Investment Management… | 262.14K | +124.8% | $7.48M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 29 | Sei Investments Co | 260.79K | +64.7% | $7.44M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 30 | Amundi | 225.93K | -2.1% | $6.45M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 31 | Universal- Beteiligungs- und… | 215.54K | +11.5% | $6.15M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 32 | Raymond James Financial Inc | 216.91K | -0.3% | $6.13M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 33 | First Trust Advisors Lp | 189.28K | +60.7% | $5.40M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 34 | AQR Capital Management ✦ | 186.38K | +86.5% | $5.32M | 0.0% | ▲ Add | 8 | SEC ↗ ×8 |
| 35 | Millennium Management ✦ | 179.89K | +9.8% | $5.13M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 36 | JPMorgan Chase ✦ | 171.26K | -4.6% | $4.84M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 37 | State Of Wisconsin Investment Board | 167.35K | +1.9% | $4.77M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 38 | Adage Capital Partners ✦ | 150.00K | +36.1% | $4.28M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 39 | Bank of New York Mellon Corp | 130.65K | -3.6% | $3.73M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 40 | Allianz Asset Management GmbH | 122.16K | +3.7% | $3.49M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 41 | Swiss National Bank | 98.00K | 0.0% | $2.80M | 0.0% | Held | 2 | SEC ↗ |
| 42 | Citadel Advisors ✦ | 87.35K | -64.0% | $2.49M | 0.0% | ▼ Trim | 8 | SEC ↗ ×2 |
| 43 | Man Group plc | 85.12K | +389.1% | $2.43M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 44 | Invesco Ltd. | 77.32K | +3.9% | $2.21M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 45 | Wells Fargo & Company/Mn | 69.08K | -31.9% | $1.97M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 46 | Hrt Financial Lp | 67.07K | New | $1.91M | 0.0% | New | 1 | SEC ↗ |
| 47 | Rhumbline Advisers | 66.28K | -1.6% | $1.89M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 48 | UBS Group AG | 65.86K | -36.7% | $1.88M | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 49 | Principal Financial Group Inc | 64.30K | +45.7% | $1.83M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 50 | T. Rowe Price ✦ | 60.28K | +19.2% | $1.72M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 51 | California State Teachers… | 59.95K | +33.3% | $1.71M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 52 | Envestnet Asset Management Inc | 57.88K | -0.7% | $1.65M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 53 | D. E. Shaw & Co. ✦ | 56.59K | New | $1.61M | 0.0% | New | 1 | SEC ↗ |
| 54 | Franklin Resources Inc | 55.52K | +6.2% | $1.58M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 55 | Lazard Asset Management Llc | 54.02K | +8.6% | $1.54M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 56 | Ameriprise Financial Inc | 52.38K | +95.2% | $1.49M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 57 | Deutsche Bank Ag\ | 50.51K | +10.0% | $1.44M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 58 | Legal & General Group Plc | 42.30K | -18.7% | $1.21M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 59 | Susquehanna International Group, Llp | 38.78K | New | $1.11M | 0.0% | New | 1 | SEC ↗ |
| 60 | Bridgewater Associates ✦ | 33.52K | New | $956,240 | 0.0% | New | 1 | SEC ↗ |
| 61 | Prudential Financial Inc | 30.27K | -50.1% | $863,603 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 62 | Us Bancorp \De\ | 28.11K | +51.2% | $801,836 | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 63 | Bnp Paribas Financial Markets | 24.16K | +68.4% | $689,399 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 64 | Janus Henderson Group Plc | 22.88K | 0.0% | $652,852 | 0.0% | Held | 2 | SEC ↗ |
| 65 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 22.70K | +0.9% | $647,488 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 66 | Manufacturers Life Insurance… | 22.52K | -0.7% | $642,610 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 67 | Zurcher Kantonalbank (Zurich… | 22.49K | +19.1% | $641,725 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 68 | Truist Financial Corp | 21.30K | +0.5% | $607,832 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 69 | LPL Financial LLC | 20.79K | -0.6% | $592,996 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 70 | Barclays Plc | 18.14K | -80.4% | $517,392 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 71 | Focus Partners Wealth | 18.13K | -0.2% | $517,364 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 72 | Balyasny Asset Management L.P. | 17.30K | New | $493,540 | 0.0% | New | 1 | SEC ↗ |
| 73 | New York State Common Retirement… | 16.79K | 0.0% | $479,104 | 0.0% | Held | 2 | SEC ↗ |
| 74 | Russell Investments Group, Ltd. | 15.33K | +3.2% | $437,486 | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 75 | Creative Planning | 13.42K | +7.0% | $382,844 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 76 | State Board Of Administration Of… | 13.30K | 0.0% | $379,420 | 0.0% | Held | 2 | SEC ↗ |
| 77 | Tidal Investments LLC | 13.06K | +0.9% | $372,516 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 78 | Stifel Financial Corp | 11.64K | -0.9% | $332,052 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 79 | American Century Companies Inc | 10.64K | -87.0% | $303,559 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 80 | Canada Pension Plan Investment Board | 9.80K | -19.7% | $279,594 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 81 | Quantinno Capital Management LP | 9.73K | New | $277,483 | 0.0% | New | 1 | SEC ↗ |
| 82 | Captrust Financial Advisors | 8.79K | +10.6% | $250,690 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 83 | Cwm, Llc | 8.77K | +254.8% | $250,123 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 84 | Mariner, LLC | 8.64K | New | $246,630 | 0.0% | New | 1 | SEC ↗ |
| 85 | Mackenzie Financial Corp | 8.42K | -38.1% | $240,223 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 86 | Wealth Enhancement Advisory… | 8.12K | +27.8% | $236,077 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 87 | Pictet Asset Management Holding SA | 7.86K | 0.0% | $224,217 | 0.0% | Held | 2 | SEC ↗ |
| 88 | ProShare Advisors LLC | 7.01K | -20.5% | $200,081 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 89 | Osaic Holdings, Inc. | 5.27K | -26.6% | $150,352 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 90 | Rockefeller Capital Management L.P. | 4.91K | +23.3% | $140,111 | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 91 | Pnc Financial Services Group, Inc. | 4.75K | -6.8% | $135,460 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 92 | Citigroup Inc | 4.52K | +225.7% | $128,984 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 93 | Jones Financial Companies Lllp | 4.28K | +730.5% | $123,520 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 94 | Ensign Peak Advisors, Inc | 4.12K | 0.0% | $117,401 | 0.0% | Held | 2 | SEC ↗ |
| 95 | Simplex Trading, Llc | 2.51K | New | $71,667 | 0.0% | New | 1 | SEC ↗ |
| 96 | Royal Bank Of Canada | 2.18K | -30.5% | $61,000 | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 97 | Fifth Third Bancorp | 1.78K | New | $50,827 | 0.0% | New | 1 | SEC ↗ |
| 98 | Assetmark, Inc | 1.50K | -4.8% | $42,652 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 99 | Mitsubishi UFJ Asset Management… | 192 | 0.0% | $5,478 | 0.0% | Held | 2 | SEC ↗ |
| 100 | Optiver Holding B.V. | 18 | -50.0% | $514 | 0.0% | ▼ Trim | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Arrowstreet Capital | $7.92M | 0.0% |
| Hrt Financial Lp | $1.91M | 0.0% |
| D. E. Shaw & Co. | $1.61M | 0.0% |
| Susquehanna International… | $1.11M | 0.0% |
| Bridgewater Associates | $956,240 | 0.0% |
| Balyasny Asset Management L.P. | $493,540 | 0.0% |
| Quantinno Capital Management… | $277,483 | 0.0% |
| Mariner, LLC | $246,630 | 0.0% |
| Simplex Trading, Llc | $71,667 | 0.0% |
| Fifth Third Bancorp | $50,827 | 0.0% |
Exited
| Point72 Asset Management | $10.99M | was 0.0% |
| Norges Bank | $8.47M | was 0.0% |
| Squarepoint Ops LLC | $3.39M | was 0.0% |
| Jane Street Group, Llc | $2.08M | was 0.0% |
| Hsbc Holdings Plc | $1.37M | was 0.0% |
| Victory Capital Management Inc | $982,789 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 221 holders, 49.84M shares, $1.41B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Sep 23
Privitera Salvatore
Officer · 4.52K sh · $271,140
Sep 11
GROVES REGINA E
Director · 5.31K sh · $288,071
Sep 08
Privitera Salvatore
Officer · 3.66K sh · $201,135
Sep 02
Privitera Salvatore
Officer · 7.76K sh · $407,558
Aug 24
Dahlquist Karl S.
Officer · 9.37K sh · $458,099
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Oct 05
SC 13G/A: BlackRock, Inc.
Aug 14
SC 13G/A: ALLIANCEBERNSTEIN L.P.
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
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