ATRC Institutional Ownership & Shareholders
ATRICURE INC (ATRC) is currently held by 263 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $1.51B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ATRC tracked by InsiderSet, reporting ownership valued at approximately $125.20M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $274.07M, representing an estimated gain of +118.91% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 47% of the total disclosed ATRC value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Wellington Management Group Llp, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in ATRICURE INC (ATRC).
This page ranks the largest institutional ATRC shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
263
Total Reported Value
$1.51B
Largest Holder
Blackrock, Inc.
Largest Position
$125.20M
Insider Transactions (90d)
7
Latest Filing Quarter
Q2 2026
New Institutional Positions
69
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 4,474,548 | $125,197,854 | $274,066,065 | +$148,868,211 | +118.91% | |
| Wellington Management Group Llp | 0.02% | 3,495,603 | $97,806,972 | $214,105,684 | +$116,298,712 | +118.91% | |
| Vanguard Portfolio Management Llc | 0.00% | 3,127,195 | $87,498,916 | $191,540,694 | +$104,041,778 | +118.91% | |
| Hood River Capital Management Llc | 0.59% | 2,905,299 | $81,290,266 | $177,949,564 | +$96,659,298 | +118.91% | |
| Alliancebernstein L.P. | 0.03% | 2,768,365 | $78,981,453 | $169,562,356 | +$90,580,903 | +114.69% | |
| Vanguard Capital Management Llc | 0.00% | 2,190,413 | $61,287,756 | $134,162,796 | +$72,875,040 | +118.91% | |
| Nomura Asset Management International Inc. | 0.07% | 1,734,279 | $48,525,000 | $106,224,589 | +$57,699,589 | +118.91% | |
| Goldman Sachs Group Inc | 0.00% | 1,597,988 | $44,711,719 | $97,876,765 | +$53,165,046 | +118.91% | |
| Neuberger Berman Group Llc | 0.03% | 1,086,326 | $42,998,602 | $66,537,468 | +$23,538,866 | +54.74% | |
| State Street Corp | 0.00% | 1,389,989 | $38,935,240 | $85,136,826 | +$46,201,586 | +118.66% | |
| Marshall Wace, Llp | 0.03% | 1,333,904 | $37,322,635 | $81,701,620 | +$44,378,985 | +118.91% | |
| Geode Capital Management, Llc | 0.00% | 1,319,687 | $36,932,309 | $80,830,829 | +$43,898,520 | +118.86% | |
| Arrowstreet Capital, Limited Partnership | 0.02% | 1,296,209 | $36,267,928 | $79,392,801 | +$43,124,873 | +118.91% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,044,034 | $29,215,881 | $63,947,083 | +$34,731,202 | +118.88% | |
| Gw&K Investment Management, Llc | 0.21% | 949,516 | $26,567,000 | $58,157,855 | +$31,590,855 | +118.91% | |
| Champlain Investment Partners, Llc | 0.67% | 938,567 | $26,261,105 | $57,487,229 | +$31,226,124 | +118.91% | |
| Bnp Paribas Asset Management Holding S.A. | 0.03% | 897,419 | $25,109,784 | $54,966,914 | +$29,857,130 | +118.91% | |
| Bank Of America Corp | 0.00% | 874,370 | $24,464,872 | $53,555,163 | +$29,090,291 | +118.91% | |
| Kennedy Capital Management Llc | 0.42% | 857,787 | $24,000,880 | $52,539,454 | +$28,538,574 | +118.91% | |
| Divisadero Street Capital Management, Lp | 0.52% | 800,931 | $22,410,049 | $49,057,024 | +$26,646,975 | +118.91% | |
| Principal Financial Group Inc | 0.01% | 386,234 | $21,706,352 | $23,656,833 | +$1,950,481 | +8.99% | |
| Point72 Asset Management, L.P. | 0.03% | 604,380 | $16,910,552 | $37,018,275 | +$20,107,723 | +118.91% | |
| Dafna Capital Management Llc | 3.19% | 597,431 | $16,716,119 | $36,592,649 | +$19,876,530 | +118.91% | |
| Grandeur Peak Global Advisors, Llc | 3.80% | 587,399 | $16,435,424 | $35,978,189 | +$19,542,765 | +118.91% | |
| Massachusetts Financial Services Co | 0.01% | 580,621 | $16,245,776 | $35,563,036 | +$19,317,260 | +118.91% | |
| First Light Asset Management, Llc | 0.97% | 567,838 | $15,888,107 | $34,780,078 | +$18,891,971 | +118.91% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 555,114 | $15,837,403 | $34,000,733 | +$18,163,330 | +114.69% | |
| Qube Research & Technologies Ltd | 0.02% | 560,824 | $15,691,856 | $34,350,470 | +$18,658,614 | +118.91% | |
| Aqr Capital Management Llc | 0.01% | 544,123 | $15,224,572 | $33,327,534 | +$18,102,962 | +118.91% | |
| Two Sigma Investments, Lp | 0.01% | 525,795 | $14,711,744 | $32,204,944 | +$17,493,200 | +118.91% | |
| Fmr Llc | 0.00% | 506,357 | $14,167,874 | $31,014,366 | +$16,846,492 | +118.91% | |
| Osterweis Capital Management Inc | 0.66% | 501,355 | $14,027,913 | $30,707,994 | +$16,680,081 | +118.91% | |
| Northern Trust Corp | 0.00% | 482,043 | $13,487,563 | $29,525,134 | +$16,037,571 | +118.91% | |
| Morgan Stanley | 0.00% | 457,798 | $12,809,189 | $28,040,128 | +$15,230,939 | +118.91% | |
| Charles Schwab Investment Management Inc | 0.00% | 423,106 | $11,838,506 | $25,915,243 | +$14,076,737 | +118.91% | |
| Panagora Asset Management Inc | 0.03% | 389,099 | $10,886,990 | $23,832,314 | +$12,945,324 | +118.91% | |
| Norges Bank | 0.00% | 374,362 | $10,474,649 | $22,929,673 | +$12,455,024 | +118.91% | |
| Nuveen, Llc | 0.00% | 365,825 | $10,235,784 | $22,406,781 | +$12,170,997 | +118.91% | |
| Wcm Investment Management, Llc | 0.02% | 351,081 | $10,076,025 | $21,503,711 | +$11,427,686 | +113.41% | |
| Vanguard Fiduciary Trust Co | 0.00% | 359,048 | $10,046,163 | $21,991,690 | +$11,945,527 | +118.91% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.02% | 335,541 | $9,388,437 | $20,551,886 | +$11,163,449 | +118.91% | |
| Hrt Financial Lp | 0.02% | 299,736 | $8,386,000 | $18,358,830 | +$9,972,830 | +118.92% | |
| First Eagle U.S. Value | Jean-Marie Eveillard | 0.01% | 297,643 | $8,328,051 | $18,230,634 | +$9,902,583 | +118.91% |
| Sei Investments Co | 0.01% | 281,310 | $7,871,117 | $17,230,238 | +$9,359,121 | +118.90% | |
| Raymond James Financial Inc | 0.00% | 266,055 | $7,444,218 | $16,295,869 | +$8,851,651 | +118.91% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 234,100 | $6,550,118 | $14,338,625 | +$7,788,507 | +118.91% |
| Universal- Beteiligungs- Und Servicegesellschaft Mbh | 0.01% | 226,338 | $6,332,938 | $13,863,203 | +$7,530,265 | +118.91% | |
| Nicholas Company, Inc. | 0.10% | 204,595 | $5,724,568 | $12,531,444 | +$6,806,876 | +118.91% | |
| D. E. Shaw & Co., Inc. | 0.00% | 192,824 | $5,395,216 | $11,810,470 | +$6,415,254 | +118.91% | |
| Citadel Advisors Llc | 0.00% | 177,339 | $4,961,945 | $10,862,014 | +$5,900,069 | +118.91% |
Frequently asked questions about ATRC
Who are the largest institutional holders of ATRC?
The largest institutional holders of ATRC reported in the latest SEC Form 13F filings include Blackrock, Inc., Wellington Management Group Llp, Vanguard Portfolio Management Llc, Hood River Capital Management Llc, and Alliancebernstein L.P.. InsiderSet ranks institutional holders by their latest reported ATRC position.
What is ATRC institutional ownership?
This page tracks ATRC positions reported by institutional investment managers through SEC Form 13F. ATRICURE INC (ATRC) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ATRC?
InsiderSet currently tracks 263 institutional managers reporting ATRC holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ATRC shareholders.
How much ATRC stock do institutions own?
Institutional investment managers disclosed approximately $1.51B in ATRC holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ATRC institutional ownership last updated?
The latest ATRC institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ATRC holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ATRC position after the reporting date.
Are institutions buying or selling ATRC?
Institutional buying and selling can be analyzed by comparing ATRC positions across consecutive 13F reporting periods. InsiderSet's ATRC Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ATRC ownership changes.
How has ATRC institutional ownership changed over time?
InsiderSet tracks ATRC institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.