AtriCure ATRC Institutional Ownership

NASDAQ ATRC

$58.99 +1.32 (+2.29%)

As of: Oct 22, 2026 · 1:29 PM EDT

Institutions by Trading Activity

252 Institutions

Increased 154 61.1%

Unchanged 36 14.3%

Reduced 62 24.6%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

—

13F totals exceed reported shares outstanding

Shares Held by Institutions

52.48Mn

of 50.86Mn outstanding

▲+4.92% QoQ

Shares Outstanding

50.86Mn

Institutional Investors

252

filed 13F for Jun 2026

▲+29 vs prior quarter

Net Shares Added (QoQ)

+2.46Mn

accumulated since last quarter

Value of Holdings

$3.03Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

AtriCure, Inc. (NASDAQ:ATRC) was held by 252 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

Total shares held in AtriCure rose 4.92% versus Q1 2026, while the number of holders rose 27.27% versus Q2 2025.
Of the 252 holders, 154 added to their positions, 62 reduced their stakes and 36 left their positions unchanged in Q2 2026.
In total, institutional investors held 52.48Mn shares of AtriCure at the end of Q2 2026, up 2.46Mn from the prior quarter and up 3.96Mn from a year earlier.
As of June 30, 2026, BlackRock, Inc. held the largest stake in AtriCure with 4.47Mn shares.
Among existing holders, the largest additions to AtriCure in Q2 2026 came from Arrowstreet Capital, Limited Partnership (+1.02Mn shares), BlackRock, Inc. (+431.87K shares), Vanguard Portfolio Management LLC (+424.56K shares), AQR Capital Management LLC (+357.74K shares) and HRT Financial LP (+232.66K shares).
The largest position reductions in ATRC for Q2 2026 were by Voya Investment Management LLC (-691.34K shares), AllianceBernstein L.P. (-490.51K shares), UBS Asset Management Americas (-423.26K shares), Divisadero Street Capital Management, LP (-359.02K shares) and Morgan Stanley (-261.36K shares).
Per Business Quant data, the 10 largest holders of AtriCure at the end of Q2 2026 were BlackRock, Inc. (4.47Mn shares), Wellington Management Group LLP (3.5Mn shares), Vanguard Portfolio Management LLC (3.13Mn shares), Hood River Capital Management LLC (2.91Mn shares), AllianceBernstein L.P. (2.77Mn shares), Vanguard Capital Management LLC (2.19Mn shares), Nomura Asset Management International Inc. (1.73Mn shares), Goldman Sachs Group Inc (1.6Mn shares), State Street Corp (1.39Mn shares) and Marshall Wace, LLP (1.33Mn shares).

Form 13F Holdings

252 Institutional Holders

Report period 30 Jun, 2026

Total shares held 52.48Mn

Of outstanding —

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	4,474,548	8.80%	▲431,867	+10.68%	$125.20Mn
2	WELLINGTON MANAGEMENT GROUP LLP	0000902219	3,495,603	6.87%	▲113,048	+3.34%	$97.81Mn
3	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	3,127,195	6.15%	▲424,563	+15.71%	$87.50Mn
4	Hood River Capital Management LLC	0001578177	2,905,299	5.71%	▼212,246	-6.81%	$81.29Mn
5	ALLIANCEBERNSTEIN L.P.	0001109448	2,768,365	5.44%	▼490,507	-15.05%	$78.98Mn
6	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	2,190,413	4.31%	▲34,649	+1.61%	$61.29Mn
7	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	0000921739	1,734,279	3.41%	▼70,648	-3.91%	$48.53Mn
8	Goldman Sachs Group Inc	0000886982	1,597,988	3.14%	▼69,178	-4.15%	$44.71Mn
9	State Street Corp	0000093751	1,389,989	2.73%	▲87,827	+6.74%	$38.94Mn
10	MARSHALL WACE, LLP	0001318757	1,333,904	2.62%	▼133,620	-9.11%	$37.32Mn
11	GEODE CAPITAL MANAGEMENT, LLC	0001214717	1,319,687	2.59%	▲93,571	+7.63%	$36.93Mn
12	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	1,296,209	2.55%	▲1,018,527	+366.80%	$36.27Mn
13	DIMENSIONAL FUND ADVISORS LP	0000354204	1,044,034	2.05%	▲46,275	+4.64%	$29.22Mn
14	GW&K Investment Management, LLC	0001082917	949,516	1.87%	▼13,899	-1.44%	$26.57K
15	Neuberger Berman Group LLC	0001465109	947,982	1.86%	▼102,300	-9.74%	$26.58Mn
16	Champlain Investment Partners, LLC	0001315478	938,567	1.85%	▼32,544	-3.35%	$26.26Mn
17	BNP Paribas Asset Management Holding S.A.	0001520354	897,419	1.76%	▼163,387	-15.40%	$25.11Mn
18	Bank Of America Corp /De/	0000070858	874,370	1.72%	▲105,809	+13.77%	$24.46Mn
19	KENNEDY CAPITAL MANAGEMENT LLC	0000884589	857,787	1.69%	▲23,632	+2.83%	$24.00Mn
20	Divisadero Street Capital Management, LP	0001901865	800,931	1.57%	▼359,024	-30.95%	$22.41Mn

Showing 1 to 20 of 252 holders