Who owns ATRCWhat ATRC owns — n/a

Who owns AtriCure, Inc.?

Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.

Institutional ownership of ATRC from SEC Form 13F filings across 251 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.

As of the 2026-06-30 reporting period, 251 institutions disclosed 52.4M shares of AtriCure, Inc. worth $1.47B — about 107.6% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.

251

13F holders

$1.47B

value, 2026 filers

107.6%

of shares outstanding (52.4M sh)

new positions (2026 filers)

Top institutional holders

ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ATRC's shares outstanding

#	Manager	Shares	Value	% of fund	% of co.	Δ shares QoQ
1	BlackRock, Inc.	4.5M	$125.2M	0.0%	9.2%	+10.7%
2	WELLINGTON MANAGEMENT GROUP LLP	3.5M	$97.8M	0.0%	7.2%	+3.3%
3	VANGUARD PORTFOLIO MANAGEMENT LLC	3.1M	$87.5M	0.0%	6.4%	+15.7%
4	Hood River Capital Management LLC	2.9M	$81.3M	0.6%	6%	-6.8%
5	ALLIANCEBERNSTEIN L.P.	2.8M	$79.0M	0.0%	5.7%	-15.1%
6	VANGUARD CAPITAL MANAGEMENT LLC	2.2M	$61.3M	0.0%	4.5%	+1.6%
7	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	1.7M	$48.5M	0.1%	3.6%	-3.9%
8	GOLDMAN SACHS GROUP INC	1.6M	$44.7M	0.0%	3.3%	-4.1%
9	STATE STREET CORP	1.4M	$38.9M	0.0%	2.9%	+6.7%
10	MARSHALL WACE, LLP	1.3M	$37.3M	0.0%	2.7%	-9.1%
11	GEODE CAPITAL MANAGEMENT, LLC	1.3M	$36.9M	0.0%	2.7%	+7.6%
12	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	1.3M	$36.3M	0.0%	2.7%	+366.8%
13	DIMENSIONAL FUND ADVISORS LP	1.0M	$29.2M	0.0%	2.1%	+4.6%
14	GW&K Investment Management, LLC	949,516	$26.6M	0.2%	2%	-1.4%
15	NEUBERGER BERMAN GROUP LLC	947,982	$26.6M	0.0%	1.9%	-9.7%
16	Champlain Investment Partners, LLC	938,567	$26.3M	0.7%	1.9%	-3.4%
17	BNP PARIBAS ASSET MANAGEMENT Holding S.A.	897,419	$25.1M	0.0%	1.8%	-15.4%
18	BANK OF AMERICA CORP /DE/	874,370	$24.5M	0.0%	1.8%	+13.8%
19	KENNEDY CAPITAL MANAGEMENT LLC	857,787	$24.0M	0.4%	1.8%	+2.8%
20	Divisadero Street Capital Management, LP	800,931	$22.4M	0.5%	1.6%	-31.0%
21	Point72 Asset Management, L.P.NEW	604,380	$16.9M	0.0%	1.2%	new
22	DAFNA Capital Management LLC	597,431	$16.7M	3.2%	1.2%	0.0%
23	Grandeur Peak Global Advisors, LLC	587,399	$16.4M	3.8%	1.2%	+53.8%
24	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	580,621	$16.2M	0.0%	1.2%	-0.8%
25	First Light Asset Management, LLC	567,838	$15.9M	1.0%	1.2%	-22.2%

Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.