AtriCure, Inc. 13F holders
251 funds reported a position in AtriCure, Inc. in their 13F for the quarter ended 30 June 2026, together 52.7 million shares worth $1.48 billion. Against the quarter before, 44 opened a position, 99 added, 62 trimmed and 23 sold out; together they bought a net 1.9 million shares. The largest holders: BlackRock, Inc., Wellington Management Group LLP and Vanguard Portfolio Management LLC.
Funds holding251+27 on Q1 2026
Shares they held52.7Mworth $1.48 billion
Net bought on the quarter1.9M sharesabout $52.9 million at the funds' values
Funds buying to selling143 to 85opened or added, to cut or sold
Opened 44Added 99Held 43Trimmed 62Sold out 23
What each fund did in ATRC against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in ATRC in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
2,671 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 48 reported a position in AtriCure, Inc.: 19 opened one, 7 added, 8 trimmed and 6 sold out, a net 226,395 shares sold.
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 8 reported a position in AtriCure, Inc. in a 13F for the quarter ended 30 June 2026. The largest: Geode Capital Management, 1.3 million shares worth $36.9 million, 0.0% of its reported book. New this quarter: Point72 Asset Management. Sold out: Millennium Management. In the quarter, 5 funds added or opened a position and 3 trimmed or sold out; together they bought a net 520,582 shares, about $14.6 million at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Geode Capital Management | 1,319,687 | $36.9 million | 0.0% | +93,571 | added | 30 June 2026 | 13F |
| Point72 Asset Management | 604,380 | $16.9 million | 0.0% | +604,380 | new | 30 June 2026 | 13F |
| Two Sigma Investments | 525,795 | $14.7 million | 0.0% | -225,208 | trimmed | 30 June 2026 | 13F |
| FMR LLC | 506,357 | $14.2 million | 0.0% | +169,543 | added | 30 June 2026 | 13F |
| Norges Bank | 374,362 | $10.5 million | 0.0% | held | 30 June 2026 | 13F | |
| Renaissance Technologies | 234,100 | $6.6 million | 0.0% | -74,600 | trimmed | 30 June 2026 | 13F |
| Citadel Advisors | 177,339 | $5.0 million | 0.0% | +89,992 | added | 30 June 2026 | 13F |
| Bridgewater Associates | 76,307 | $2.1 million | 0.0% | +42,790 | added | 30 June 2026 | 13F |
| Millennium Management | 0 | $0 | 0.0% | -179,886 | exited | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 4,474,548 | 8.48% | $125.2 million | 0.00% | +431,867 | 13F |
| Wellington Management Group LLP | 3,495,603 | 6.63% | $97.8 million | 0.02% | +113,048 | 13F |
| Vanguard Portfolio Management LLC | 3,127,195 | 5.93% | $87.5 million | 0.00% | +424,563 | 13F |
| Hood River Capital Management LLC | 2,905,299 | 5.51% | $81.3 million | 0.59% | -212,246 | 13F |
| AllianceBernstein L.P. | 2,768,365 | 5.25% | $79.0 million | 0.03% | -490,507 | 13F |
| Vanguard Capital Management LLC | 2,190,413 | 4.15% | $61.3 million | 0.00% | +34,649 | 13F |
| Nomura Asset Management International Inc. | 1,734,279 | 3.29% | $48.5 million | 0.07% | -70,648 | 13F |
| Goldman Sachs Group Inc. | 1,597,988 | 3.03% | $44.7 million | 0.01% | -69,178 | 13F |
| State Street Corp. | 1,389,989 | 2.64% | $38.9 million | 0.00% | +87,827 | 13F |
| Marshall Wace, LLP | 1,333,904 | 2.53% | $37.3 million | 0.03% | -133,620 | 13F |
| Geode Capital Management, LLC | 1,319,687 | 2.50% | $36.9 million | 0.00% | +93,571 | 13F |
| Arrowstreet Capital, Limited Partnership | 1,296,209 | 2.46% | $36.3 million | 0.02% | +1,018,527 | 13F |
| Dimensional Fund Advisors LP | 1,044,034 | 1.98% | $29.2 million | 0.01% | +46,275 | 13F |
| Neuberger Berman Group LLC | 947,982 | 1.80% | $26.6 million | 0.02% | -102,300 | 13F |
| GW&K Investment Management, LLC | 949,516 | 1.80% | $26.6 million | 0.21% | -13,899 | 13F |
| Champlain Investment Partners, LLC | 938,567 | 1.78% | $26.3 million | 0.68% | -32,544 | 13F |
| BNP Paribas Asset Management Holding S.A. | 897,419 | 1.70% | $25.1 million | 0.03% | -163,387 | 13F |
| Bank of America Corp. | 874,370 | 1.66% | $24.5 million | 0.00% | +105,809 | 13F |
| Kennedy Capital Management LLC | 857,787 | 1.63% | $24.0 million | 0.42% | +23,632 | 13F |
| Divisadero Street Capital Management, LP | 800,931 | 1.52% | $22.4 million | 0.52% | -359,024 | 13F |
| Point72 Asset Management, L.P. | 604,380 | 1.15% | $16.9 million | 0.03% | new | 13F |
| Dafna Capital Management LLC | 597,431 | 1.13% | $16.7 million | 3.19% | no change | 13F |
| First Eagle Investment Management, LLC | 595,286 | 1.13% | $16.7 million | 0.01% | 13F | |
| Grandeur Peak Global Advisors, LLC | 587,399 | 1.11% | $16.4 million | 3.80% | +205,497 | 13F |
| Massachusetts Financial Services Co. | 580,621 | 1.10% | $16.2 million | 0.01% | -4,732 | 13F |
| First Light Asset Management, LLC | 567,838 | 1.08% | $15.9 million | 0.97% | -161,683 | 13F |
| Qube Research & Technologies Ltd | 560,824 | 1.06% | $15.7 million | 0.02% | +106,033 | 13F |
| AQR Capital Management LLC | 544,123 | 1.03% | $15.2 million | 0.01% | +357,741 | 13F |
| Two Sigma Investments, LP | 525,795 | 1.00% | $14.7 million | 0.01% | -225,208 | 13F |
| FMR LLC | 506,357 | 0.96% | $14.2 million | 0.00% | +169,543 | 13F |
| Osterweis Capital Management Inc. | 501,355 | 0.95% | $14.0 million | 0.76% | +151,710 | 13F |
| Northern Trust Corp. | 482,043 | 0.91% | $13.5 million | 0.00% | +32,444 | 13F |
| Morgan Stanley | 457,798 | 0.87% | $12.8 million | 0.00% | -261,364 | 13F |
| Charles Schwab Investment Management Inc. | 423,106 | 0.80% | $11.8 million | 0.00% | -6,727 | 13F |
| Panagora Asset Management Inc. | 389,099 | 0.74% | $10.9 million | 0.03% | +161,722 | 13F |
| Norges Bank | 374,362 | 0.71% | $10.5 million | 0.00% | 13F | |
| Nuveen, LLC | 365,825 | 0.69% | $10.2 million | 0.00% | +29,098 | 13F |
| WCM Investment Management, LLC | 351,081 | 0.67% | $10.1 million | 0.02% | -8,680 | 13F |
| Vanguard Fiduciary Trust Co. | 359,048 | 0.68% | $10.0 million | 0.00% | +16,194 | 13F |
| Connor, Clark & Lunn Investment Management Ltd. | 335,541 | 0.64% | $9.4 million | 0.02% | -9,847 | 13F |
| HRT Financial LP | 299,736 | 0.57% | $8.4 million | 0.01% | +232,665 | 13F |
| Sei Investments Co. | 281,310 | 0.53% | $7.9 million | 0.01% | +20,522 | 13F |
| Raymond James Financial Inc. | 266,055 | 0.50% | $7.4 million | 0.00% | +49,148 | 13F |
| Amundi | 264,854 | 0.50% | $7.4 million | 0.00% | +38,922 | 13F |
| Renaissance Technologies LLC | 234,100 | 0.44% | $6.6 million | 0.01% | -74,600 | 13F |
| Wasatch Advisors LP | 233,604 | 0.44% | $6.5 million | 0.04% | -20,327 | 13F |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 226,338 | 0.43% | $6.3 million | 0.01% | +10,793 | 13F |
| Nicholas Company, Inc. | 204,595 | 0.39% | $5.7 million | 0.10% | no change | 13F |
| D. E. Shaw & Co., Inc. | 192,824 | 0.37% | $5.4 million | 0.00% | +136,235 | 13F |
| Citadel Advisors LLC | 177,339 | 0.34% | $5.0 million | 0.00% | +89,992 | 13F |
The 50 largest of the 251 funds that reported a position in ATRC in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on ATRC
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Puts | 11,500 | $321,770 | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
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They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 5 October 2026 | 13G/A | BlackRock, Inc. and 1 other | 7.8 million | 15.4% | 30 September 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 14 August 2026 | 13G/A | AllianceBernstein L.P. and 1 other | 2.8 million | 5.5% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 15 May 2026 | 13G/A | Wellington Management Group LLP and 7 others | 3.4 million | 6.8% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 29 April 2026 | 13G | Vanguard Capital Management and 1 other | 2.5 million | 5.1% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 28 April 2026 | 13G | Vanguard Portfolio Management and 1 other | 2.7 million | 5.5% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 26 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 17 February 2026 | 13G/A | Hood River Capital Management LLC and 1 other | 3.1 million | 6.2% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 13 November 2025 | 13G/A | Macquarie Group Limited and 5 others | 2.3 million | 4.6% | 30 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 25 September 2026 | 1,570 | $60.77 | SEC |
| 24 September 2026 | 20,499 | $59.96 | SEC |
| 21 September 2026 | 63,982 | $58.10 | SEC |
| 17 September 2026 | 9,182 | $57.14 | SEC |
| 16 September 2026 | 33,848 | $56.22 | SEC |
| 10 September 2026 | 11,918 | $53.03 | SEC |
| 25 August 2026 | 3 | $49.28 | SEC |
| 24 August 2026 | 70 | $48.98 | SEC |
| 20 August 2026 | 182 | $47.61 | SEC |
| 18 August 2026 | 178 | $44.77 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.