AtriCure, Inc. (ATRC) — Institutional Holders, Q2 2026

254 institutional investment managers reported a ATRC position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $1.5B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← ATRC stock profile

ATRC in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

Added to

103

Trimmed

Sold out

Biggest buyers

ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded · +1,018,527 sh+$28.5M
Point72 Asset Management, L.P.New · +604,380 sh+$16.9M
BlackRockAdded · +431,867 sh+$12.1M
VANGUARD PORTFOLIO MANAGEMENTAdded · +424,563 sh+$11.9M
AQR CAPITAL MANAGEMENTAdded · +357,741 sh+$10.0M

Biggest sellers

VOYA INVESTMENT MANAGEMENTTrimmed · -691,336 sh-$19.3M
ALLIANCEBERNSTEIN L.P.Trimmed · -490,507 sh-$13.7M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMETrimmed · -423,261 sh-$11.8M
Divisadero Street Capital ManagementTrimmed · -359,024 sh-$10.0M
MORGAN STANLEYTrimmed · -261,364 sh-$7.3M

ATRC 13F holders ranked 1–100 of 254

Institutional investors reporting a position in AtriCure, Inc. on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	BlackRock#1 · 4,474,548 sh	4,474,548	$125.2M	<0.01%	+10.7%
2	WELLINGTON MANAGEMENT GROUP LLP#2 · 3,495,603 sh	3,495,603	$97.8M	0.02%	+3.3%
3	VANGUARD PORTFOLIO MANAGEMENT#3 · 3,127,195 sh	3,127,195	$87.5M	<0.01%	+15.7%
4	Hood River Capital Management#4 · 2,905,299 sh	2,905,299	$81.3M	0.59%	-6.8%
5	ALLIANCEBERNSTEIN L.P.#5 · 2,768,365 sh	2,768,365	$79.0M	0.03%	-15.1%
6	VANGUARD CAPITAL MANAGEMENT#6 · 2,190,413 sh	2,190,413	$61.3M	<0.01%	+1.6%
7	NOMURA ASSET MANAGEMENT INTERNATIONAL#7 · 1,734,279 sh	1,734,279	$48.5M	0.07%	-3.9%
8	GOLDMAN SACHS GROUP#8 · 1,597,988 sh	1,597,988	$44.7M	<0.01%	-4.1%
9	STATE STREET#9 · 1,389,989 sh	1,389,989	$38.9M	<0.01%	+6.7%
10	MARSHALL WACE, LLP#10 · 1,333,904 sh	1,333,904	$37.3M	0.03%	-9.1%
11	GEODE CAPITAL MANAGEMENT#11 · 1,319,687 sh	1,319,687	$36.9M	<0.01%	+7.6%
12	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#12 · 1,296,209 sh	1,296,209	$36.3M	0.02%	+366.8%
13	DIMENSIONAL FUND ADVISORS#13 · 1,044,034 sh	1,044,034	$29.2M	<0.01%	+4.6%
14	Neuberger Berman Group#14 · 947,982 sh	947,982	$26.6M	0.02%	-9.7%
15	GW&K Investment Management#15 · 949,516 sh	949,516	$26.6M	0.21%	-1.4%
16	Champlain Investment Partners#16 · 938,567 sh	938,567	$26.3M	0.67%	-3.4%
17	BNP Paribas Asset Management Holding S.A.#17 · 897,419 sh	897,419	$25.1M	0.03%	-15.4%
18	BANK OF AMERICA#18 · 874,370 sh	874,370	$24.5M	<0.01%	+13.8%
19	KENNEDY CAPITAL MANAGEMENT#19 · 857,787 sh	857,787	$24.0M	0.42%	+2.8%
20	Divisadero Street Capital Management#20 · 800,931 sh	800,931	$22.4M	0.51%	-31.0%
21	Point72 Asset Management, L.P.#21 · 604,380 sh	604,380	$16.9M	0.02%	New
22	DAFNA Capital Management#22 · 597,431 sh	597,431	$16.7M	3.19%	0.0%
23	Grandeur Peak Global Advisors#23 · 587,399 sh	587,399	$16.4M	3.80%	+53.8%
24	MASSACHUSETTS FINANCIAL SERVICES#24 · 580,621 sh	580,621	$16.2M	<0.01%	-0.8%
25	First Light Asset Management#25 · 567,838 sh	567,838	$15.9M	0.97%	-22.2%
26	Qube Research & Technologies Ltd#26 · 560,824 sh	560,824	$15.7M	0.01%	+23.3%
27	AQR CAPITAL MANAGEMENT#27 · 544,123 sh	544,123	$15.2M	<0.01%	+191.9%
28	TWO SIGMA INVESTMENTS#28 · 525,795 sh	525,795	$14.7M	0.01%	-30.0%
29	FMR#29 · 506,357 sh	506,357	$14.2M	<0.01%	+50.3%
30	OSTERWEIS CAPITAL MANAGEMENT#30 · 501,355 sh	501,355	$14.0M	0.66%	+43.4%
31	NORTHERN#31 · 482,043 sh	482,043	$13.5M	<0.01%	+7.2%
32	MORGAN STANLEY#32 · 457,798 sh	457,798	$12.8M	<0.01%	-36.3%
33	CHARLES SCHWAB INVESTMENT MANAGEMENT#33 · 423,106 sh	423,106	$11.8M	<0.01%	-1.6%
34	PANAGORA ASSET MANAGEMENT#34 · 389,099 sh	389,099	$10.9M	0.03%	+71.1%
35	NORGES BANK#35 · 374,362 sh	374,362	$10.5M	<0.01%	—
36	Nuveen#36 · 365,825 sh	365,825	$10.2M	<0.01%	+8.6%
37	WCM INVESTMENT MANAGEMENT#37 · 351,081 sh	351,081	$10.1M	0.02%	-2.4%
38	VANGUARD FIDUCIARY#38 · 359,048 sh	359,048	$10.0M	<0.01%	+4.7%
39	Connor, Clark & Lunn Investment Management Ltd.#39 · 335,541 sh	335,541	$9.4M	0.02%	-2.9%
40	HRT FINANCIAL#40 · 299,736 sh	299,736	$8.4M	0.02%	+346.9%
41	First Eagle Investment Management#41 · 297,643 sh	297,643	$8.3M	0.01%	+13.5%
42	SEI INVESTMENTS#42 · 281,310 sh	281,310	$7.9M	<0.01%	+7.9%
43	RAYMOND JAMES FINANCIAL#43 · 266,055 sh	266,055	$7.4M	<0.01%	+22.7%
44	Amundi#44 · 264,854 sh	264,854	$7.4M	<0.01%	+17.2%
45	RENAISSANCE TECHNOLOGIES#45 · 234,100 sh	234,100	$6.6M	<0.01%	-24.2%
46	WASATCH ADVISORS#46 · 233,604 sh	233,604	$6.5M	—	-8.0%
47	Universal- Beteiligungs- und Servicegesellschaft mbH#47 · 226,338 sh	226,338	$6.3M	<0.01%	+5.0%
48	NICHOLAS COMPANY#48 · 204,595 sh	204,595	$5.7M	0.10%	0.0%
49	D. E. Shaw#49 · 192,824 sh	192,824	$5.4M	<0.01%	+240.7%
50	CITADEL ADVISORS#50 · 177,339 sh	177,339	$5.0M	<0.01%	+103.0%
51	Advisors Capital Management#51 · 174,496 sh	174,496	$4.9M	0.05%	-4.3%
52	Meros Investment Management#52 · 170,000 sh	170,000	$4.8M	1.51%	New
53	JPMORGAN CHASE#53 · 160,393 sh	160,393	$4.7M	<0.01%	-6.3%
54	ACADIAN ASSET MANAGEMENT#54 · 161,394 sh	161,394	$4.5M	<0.01%	+81.6%
55	STATE OF WISCONSIN INVESTMENT BOARD#55 · 151,835 sh	151,835	$4.2M	<0.01%	-9.3%
56	Bank of New York Mellon#56 · 141,275 sh	141,275	$4.0M	<0.01%	+8.1%
57	Topline Capital Management#57 · 138,490 sh	138,490	$3.9M	1.00%	New
58	RICE HALL JAMES & ASSOCIATES#58 · 134,207 sh	134,207	$3.8M	0.18%	+432.4%
59	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#59 · 131,853 sh	131,853	$3.7M	<0.01%	-76.2%
60	Allianz Asset Management GmbH#60 · 122,158 sh	122,158	$3.5M	<0.01%	0.0%
61	PARADIGM CAPITAL MANAGEMENT#61 · 123,100 sh	123,100	$3.4M	0.09%	0.0%
62	SIT INVESTMENT ASSOCIATES#62 · 113,330 sh	113,330	$3.2M	0.06%	0.0%
63	WELLS FARGO & COMPANY#63 · 104,743 sh	104,743	$2.9M	<0.01%	+51.6%
64	ADAGE CAPITAL PARTNERS GP, L.L.C.#64 · 100,000 sh	100,000	$2.8M	<0.01%	-33.3%
65	Swiss National Bank#65 · 96,500 sh	96,500	$2.7M	<0.01%	-1.5%
66	AMERIPRISE FINANCIAL#66 · 94,897 sh	94,897	$2.7M	<0.01%	+81.2%
67	LPL Financial#67 · 92,858 sh	92,858	$2.6M	<0.01%	+346.8%
68	ExodusPoint Capital Management#68 · 86,356 sh	86,356	$2.4M	0.02%	New
69	Invesco Ltd.#69 · 84,847 sh	84,847	$2.4M	<0.01%	+9.7%
70	HighMark Wealth Management#70 · 83,720 sh	83,720	$2.3M	0.78%	0.0%
71	Susquehanna Portfolio Strategies#71 · 80,089 sh	80,089	$2.2M	0.04%	New
72	Emerald Investment Advisers#72 · 79,102 sh	79,102	$2.2M	0.15%	+10.6%
73	Bridgewater Associates#73 · 76,307 sh	76,307	$2.1M	<0.01%	+127.7%
74	PRICE T ROWE ASSOCIATES#74 · 73,079 sh	73,079	$2.0M	<0.01%	+21.2%
75	Riverwater Partners#75 · 71,596 sh	71,596	$2.0M	0.59%	+1.5%
76	PRINCIPAL FINANCIAL GROUP#76 · 69,852 sh	69,852	$2.0M	<0.01%	+8.6%
77	Schonfeld Strategic Advisors#77 · 68,243 sh	68,243	$1.9M	<0.01%	-32.9%
78	UBS Group AG#78 · 64,186 sh	64,186	$1.8M	<0.01%	-2.5%
79	RHUMBLINE ADVISERS#79 · 63,916 sh	63,916	$1.8M	<0.01%	-3.6%
80	Assenagon Asset Management S.A.#80 · 62,334 sh	62,334	$1.7M	—	New
81	DEUTSCHE BANK AG\#81 · 59,668 sh	59,668	$1.7M	<0.01%	+18.1%
82	FRANKLIN RESOURCES#82 · 58,890 sh	58,890	$1.6M	<0.01%	+6.1%
83	Granite Investment Partners#83 · 58,828 sh	58,828	$1.6M	0.08%	New
84	ENVESTNET ASSET MANAGEMENT#84 · 55,141 sh	55,141	$1.5M	<0.01%	-4.7%
85	Orion Porfolio Solutions#85 · 55,105 sh	55,105	$1.5M	0.01%	-5.5%
86	Brevan Howard Capital Management#86 · 54,447 sh	54,447	$1.5M	0.01%	+473.1%
87	Knott David M Jr#87 · 51,400 sh	51,400	$1.4M	0.76%	0.0%
88	VOLORIDGE INVESTMENT MANAGEMENT#88 · 50,582 sh	50,582	$1.4M	<0.01%	-48.0%
89	SUSQUEHANNA FUNDAMENTAL INVESTMENTS#89 · 50,484 sh	50,484	$1.4M	0.03%	New
90	Diversified#90 · 50,222 sh	50,222	$1.4M	0.02%	+25.3%
91	B. Metzler seel. Sohn & AG#91 · 49,876 sh	49,876	$1.4M	0.01%	0.0%
92	FIRST ADVISORS#92 · 48,407 sh	48,407	$1.4M	<0.01%	-74.4%
93	Engineers Gate Manager#93 · 48,160 sh	48,160	$1.3M	0.02%	+12.3%
94	VANGUARD ASSET MANAGEMENT, Ltd#94 · 44,784 sh	44,784	$1.3M	<0.01%	0.0%
95	HARBOR CAPITAL ADVISORS#95 · 42,385 sh	42,385	$1.2M	—	+2.0%
96	SCOTIA CAPITAL#96 · 41,495 sh	41,495	$1.2M	<0.01%	+2.8%
97	IEQ CAPITAL#97 · 41,484 sh	41,484	$1.2M	<0.01%	+421.7%
98	Legal & General Group Plc#98 · 39,893 sh	39,893	$1.1M	<0.01%	-5.7%
99	Caption Management#99 · 39,168 sh	39,168	$1.1M	<0.01%	New
100	XTX Topco Ltd#100 · 37,248 sh	37,248	$1.0M	0.01%	New

Funds that sold out of ATRC in Q2 2026 (22)

Held ATRC at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held ATRC in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
MILLENNIUM MANAGEMENT179,886 sh	179,886	$5.1M
LAZARD ASSET MANAGEMENT54,015 sh	54,015	$1.5M
Oak Harvest Investment Services45,000 sh	45,000	$1.3M
GSA CAPITAL PARTNERS LLP36,242 sh	36,242	$1.0M
BALYASNY ASSET MANAGEMENT L.P.17,299 sh	17,299	$493.5K
MIRABELLA FINANCIAL SERVICES LLP15,731 sh	15,731	$448.8K
CAXTON ASSOCIATES LLP10,472 sh	10,472	$298.8K
BESSEMER GROUP9,570 sh	9,570	$273.0K
Graham Capital Management, L.P.9,563 sh	9,563	$272.8K
Cornerstone Investment Partners9,178 sh	9,178	$261.8K
Vanguard Personalized Indexing Management8,635 sh	8,635	$246.4K
QUADRANT CAPITAL GROUP11,232 sh	11,232	$209.2K
ProShare Advisors7,013 sh	7,013	$200.1K
State of Wyoming3,537 sh	3,537	$100.9K
STRS OHIO1,800 sh	1,800	$51.4K
Geneos Wealth Management1,135 sh	1,135	$32.4K
C M BIDWELL & ASSOCIATES LTD117 sh	117	$3.3K
LRI Investments78 sh	78	$2.2K
Wealth Preservation Advisors48 sh	48	$1.4K
Investors Portfolio Services41 sh	41	$1.1K
Hughes Financial Services4 sh	4	$114.00
Avion Wealth19 sh	19	$0.00

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.