AtriCure, Inc.

ATRC

Exchange: Nasdaq
Industry: Surgical & Medical Instruments & Apparatus
SEC CIK: 0001323885

SEC filings (opens in a new tab)

In the last 90 days, AtriCure, Inc. insiders filed 0 open-market purchases and 10 sales; 251 institutions reported holding it in 13F filings for Q2 2026, worth $1.47B in total; no superinvestor holds it.

Q1 2026 vs. Q4 2025

How the institutions holding AtriCure, Inc. changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of ATRC: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Of which not filed for Q1 2026	Q1 2026	Change
Holders	234	5	224	−5
Shares	48.7M	5.12M	50.0M	+6.41M (+14.7%)
Value	$1.93B	$202.6M	$1.46B	−$263.0M (−15.2%)

5 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (35)

Institutions that held AtriCure, Inc. at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to ATRC in Q1 2026
Institution	Shares	Value	% of portfolio
Vanguard Portfolio Management LLC	2,702,632	$77.1M	0.00%
Vanguard Capital Management LLC	2,155,764	$61.5M	0.00%
Divisadero Street Capital Management, LP	1,159,955	$33.1M	1.55%
Vanguard Fiduciary Trust Co	342,854	$9.78M	0.00%
Arrowstreet Capital, Limited Partnership	277,682	$7.92M	0.00%
Schonfeld Strategic Advisors LLC	101,682	$2.90M	0.02%
Emerald Investment Advisers, LLC	71,492	$2.04M	0.18%
HRT Financial LP	67,071	$1.91M	0.00%
D. E. Shaw & Co., Inc.	56,589	$1.61M	0.00%
Vanguard Asset Management, Ltd	44,784	$1.28M	0.00%
Susquehanna International Group, LLP	38,777	$1.11M	0.00%
Bridgewater Associates, LP	33,517	$956.2K	0.00%
Rice Hall James & Associates, LLC	25,210	$719.2K	0.04%
Teacher Retirement System of Texas	21,949	$626.2K	0.00%
Vanguard Global Advisers, LLC	19,435	$554.5K	0.00%
Vident Advisory, LLC	18,140	$517.5K	0.00%
Balyasny Asset Management LLC	17,299	$493.5K	0.00%
Mirabella Financial Services LLP	15,731	$448.8K	0.04%
Valmark Advisers, Inc.	13,080	$373.2K	0.00%
Vanguard Investments Australia, Ltd.	12,181	$347.5K	0.00%
Aquatic Capital Management LLC	11,774	$335.9K	0.01%
Quantinno Capital Management LP	9,726	$277.5K	0.00%
Cornerstone Investment Partners, LLC	9,178	$261.8K	0.01%
Mariner, LLC	8,645	$246.6K	0.00%
Ieq Capital, LLC	7,952	$226.9K	0.00%
Simplex Trading, LLC	2,512	$71.7K	0.00%
Fifth Third Bancorp	1,781	$50.8K	0.00%
Salem Investment Counselors Inc	111	$3.17K	0.00%
Owl Creek Wealth Partners LLC	110	$3.14K	0.00%
Mather Group, LLC.	55	$1.57K	0.00%
Wealth Preservation Advisors, LLC	48	$1.37K	0.00%
Keating Financial Advisory Services, Inc.	48	$1.37K	0.00%
Investors Portfolio Services LLC	41	$1.09K	0.00%
Basecamp Wealth Advisors LLC	23	$656	0.00%
SJS Investment Consulting Inc.	11	$314	0.00%

Sold out (40)

Institutions that held AtriCure, Inc. at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of ATRC in Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Defilade Capital Management, L.P.	397,636	$15.7M
Point72 Asset Management, L.P.	277,924	$11.0M
Two Sigma Advisers, LP	277,700	$11.0M
Oberweis Asset Management Inc	217,992	$8.62M
Susquehanna Portfolio Strategies, LLC	86,325	$3.42M
Squarepoint Ops LLC	85,803	$3.39M
F/M Investments LLC	72,588	$2.87M
Jane Street Group, LLC	52,620	$2.08M
Deerfield Management Company, L.P. (Series C)	52,076	$2.06M
OpenArc Corporate Advisory, LLC	44,084	$1.74M
Y-Intercept (Hong Kong) Ltd	34,728	$1.37M
Victory Capital Management Inc	24,843	$982.8K
Campbell & CO Investment Adviser LLC	23,082	$913.1K
PDT Partners, LLC	21,201	$838.7K
HSBC Holdings PLC	17,224	$685.6K
Jump Financial, LLC	16,664	$659.2K
Fox Run Management, L.L.C.	14,225	$562.7K
Bridgefront Capital, LLC	12,506	$494.7K
Verition Fund Management LLC	11,301	$447.1K
XTX Topco Ltd	11,069	$437.9K
Versor Investments LP	10,500	$415.4K
ExodusPoint Capital Management, LP	8,966	$354.7K
Quest Partners LLC	8,874	$351.1K
M&T Bank Corp	7,060	$278.9K
Atria Investments LLC	6,476	$256.2K
Prelude Capital Management, LLC	6,095	$241.1K
Stratos Wealth Advisors, LLC	5,472	$216.5K
Skopos Labs, Inc.	4,994	$201.9K
Kemnay Advisory Services Inc.	2,892	$114.4K
Amalgamated Bank	1,520	$60.0K
Quarry LP	295	$11.7K
Fortitude Family Office, LLC	37	$1.46K
Torren Management, LLC	20	$791
Advocate Investing Services LLC	20	$791
Sunbelt Securities, Inc.	7	$277
Clearstead Advisors, LLC	3	$119
SageView Advisory Group, LLC	2	$80
SBI Securities Co., Ltd.	2	$79
TFC Financial Management	1	$40
Dunhill Financial, LLC	1	$34

Not filed for Q1 2026 yet (5)

Institutions that held AtriCure, Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ATRC in Q4 2025 that haven't filed for Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Vanguard Group Inc	4,903,755	$194.0M
Norges Bank	214,016	$8.47M
Comerica Bank	2,213	$87.6K
Global Retirement Partners, LLC	1,854	$73.3K
CIBC Private Wealth Group, LLC	73	$2.89K