AtriCure

ATRC • NASDAQ

AtriCure is a medical - instruments & supplies company in the healthcare sector on NASDAQ, led by Michael H. Carrel, with a market cap of $2.1B. As of Q3 2025, 97% of shares are held by 218 institutional investors, with VANGUARD GROUP INC as the largest holder at 9.74%.

Chief Executive OfficerMichael H. Carrel

Market Cap$2.1B

Medical - Instruments & Supplies

Healthcare

Employees1.2K

Websiteatricure.com

Country

United States of America

Overview

Overview of institutional ownership in ATRC as of Q3 2025 with a market cap of $1.8B

All Institutions

Institutions: 218
Value Held: $1.7B
Shares Held: 48.1M
Avg Position: $7.8M
Median Position: $662.5K

Hedge Funds

Hedge Funds: 27
Value Held: $150.8M
Shares Held: 4.3M
Avg Position: $5.6M
Median Position: $2.3M

Ownership Breakdown

Institutional (non-HF)

88.23%

$1.5B

Hedge Funds

8.61%

$150.8M

Retail & Other

3.16%

$55.4M

Based on market cap of $1.8B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in ATRC as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
VANGUARD GROUP INC Institution	Salim Ramji CEO	$170.6M 0.00% of portfolio	9.74% 4.8M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
WELLINGTON MANAGEMENT CO LLP Long Only Manager	Jean Marie Hynes CEO	$151.3M 0.03% of portfolio	8.64% 4.3M shares	≤ Q2 2013 Held for 12y 5m+	$571.21B
B BlackRock, Inc. Institution	-	$140.9M 0.00% of portfolio	8.04% 4.0M shares	≤ Q2 2013 Held for 12y 5m+	$5.67T
ALLIANCEBERNSTEIN L.P. Long Only Manager	Seth Perry Bernstein CEO	$125.4M 0.04% of portfolio	7.16% 3.6M shares	≤ Q2 2013 Held for 12y 5m+	$317.45B
Hood River Capital Management LLC Long Only Manager	Brian Paul Smoluch Managing Partner	$107.4M 1.27% of portfolio	6.13% 3.0M shares	Q3 2023 Held for 2y 2m	$8.5B
M MACQUARIE GROUP LTD Institution	-	$80.7M 0.10% of portfolio	4.61% 2.3M shares	Q2 2016 Held for 9y 5m	$82.9B
C Champlain Investment Partners, LLC Long Only Manager	Judith Wilkinson O'Connell CEO	$69.7M 0.53% of portfolio	3.98% 2.0M shares	Q3 2019 Held for 6y 2m	$13.3B
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$44.6M 0.00% of portfolio	2.54% 1.3M shares	≤ Q2 2013 Held for 12y 5m+	$2.88T
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$42.0M 0.00% of portfolio	2.40% 1.2M shares	≤ Q2 2013 Held for 12y 5m+	$1.57T
N Neuberger Berman Group LLC Institution	-	$42.0M 0.03% of portfolio	2.40% 1.2M shares	Q1 2017 Held for 8y 8m	$136.94B

Net Capital Flow

Institutional buying and selling activity for ATRC in Q3 2025

Traded: −$22.1M
Buyers: 106
Sellers: 88
Total Bought: +$96.2M
Total Sold: −$118.2M
Avg Position: $7.4M

Biggest Buyers

Institution	Net Bought	Current Position
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Long Only Manager	+$15.0M +424.7K shares	$15.0M 424.7K shares
WELLINGTON MANAGEMENT CO LLP Long Only Manager	+$11.4M +322.8K shares	$151.3M 4.3M shares
Point72 Ltd RIA/Wealth	+$9.2M +262.1K shares	$9.2M 262.1K shares
KENNEDY CAPITAL MANAGEMENT, INC. Long Only Manager	+$7.8M +222.5K shares	$29.5M 836.9K shares
OBERWEIS ASSET MANAGEMENT INC/ Long Only Manager	+$5.4M +153.5K shares	$5.4M 153.5K shares
FMR LLC Institution	+$4.4M +123.7K shares	$13.9M 394.0K shares
ALGERT COLDIRON INVESTORS LLC Hedge Fund•Quant	+$3.2M +91.0K shares	$5.2M 147.0K shares
Connor, Clark & Lunn Investment Management Ltd. Long Only Manager	+$3.1M +86.9K shares	$12.4M 351.3K shares
Grandeur Peak Global Advisors, LLC Long Only Manager	+$2.8M +78.9K shares	$2.8M 78.9K shares
DEERFIELD MANAGEMENT CO /NY Hedge Fund•Long/Short	+$2.7M +76.4K shares	$3.1M 87.6K shares

Biggest Sellers

Institution	Net Sold	Current Position
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC Long Only Manager	−$21.5M −609.5K shares	$20.9M 593.3K shares
Marshall Wace LLP Institution	−$15.7M −446.1K shares	$19.7M 559.2K shares
N Nuveen, LLC Institution	−$13.5M −381.7K shares	$19.6M 556.6K shares
M MACQUARIE GROUP LTD Institution	−$7.5M −213.8K shares	$80.7M 2.3M shares
GANNETT WELSH & KOTLER Long Only Manager	−$5.2M −147.3K shares	$30.4M 861.0K shares
First Light Asset Management, LLC Hedge Fund•Sector	−$4.4M −124.8K shares	$31.4M 890.4K shares
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	−$4.2M −118.9K shares	$9.1M 258.8K shares
A ADAGE CAPITAL PARTNERS GP LLC Institution	−$3.5M −100.0K shares	$6.2M 175.0K shares
WASATCH ADVISORS INC Long Only Manager	−$3.5M −98.1K shares	$14.4M 408.8K shares
TWO SIGMA ADVISERS, LLC Hedge Fund•Multi-Strategy	−$3.3M −94.1K shares	$12.6M 357.0K shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited ATRC in Q3 2025

New Positions: 9
New Value: $818.9K
Exited Positions: 10
Exited Value: $5.9M

New Positions

Institution	Position Value
HOHIMER WEALTH MANAGEMENT, LLC RIA/Wealth	$246.8K 7.0K shares
O OMERS ADMINISTRATION Corp Institution	$222.1K 6.3K shares
Verdence Capital Advisors LLC RIA/Wealth	$218.7K 6.0K shares
S State of Alaska, Department of Revenue Institution	$101.2K 2.9K shares
Point72 Europe LLP Digital Asset Manager	$20.4K 579.0 shares
O Optiver Holding B.V. Institution	$8.9K 252.0 shares
Caitong International Asset Management Co., Ltd RIA/Wealth	$776.0 22.0 shares
S SBI Securities Co., Ltd. Institution	$71.0 2.0 shares
TFC Financial Management RIA/Wealth	$36.0 1.0 shares

Exited Positions

Institution	Previous Position
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$2.2M 66.2K shares
A Assenagon Asset Management S.A. Institution	$1.5M 47.0K shares
N NATIXIS Institution	$616.1K 18.8K shares
P Petrus Trust Company, LTA Institution	$412.9K 12.6K shares
Calamos Advisors LLC Long Only Manager	$397.4K 12.1K shares
C Campbell & CO Investment Adviser LLC Hedge Fund•Quant Macro	$284.5K 8.7K shares
D D. E. Shaw & Co., Inc. Institution	$254.8K 7.8K shares
BAILARD, INC. RIA/Wealth	$213.0K 6.5K shares
N NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO Institution	$4.1K 125.0 shares
C CENTRAL TRUST & INVESTMENT CO Institution	$1.1K 35.0 shares

Options Activity

Institutions with the largest Call and Put options positions in ATRC as of Q3 2025

Call Positions: 2
Call Value: $955.3K
Put Positions: 0
Put Value: -

Call Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$694.4K 197.0 contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$260.9K 74.0 contracts

Put Positions

Institution	Position Value
No put positions found

Most Committed Institutions

Institutions with ATRC as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
D DAFNA Capital Management LLC Hedge Fund•Event Driven	Nathan Fischel CEO	5.25% $20.9M	1.19% 592.3K shares	≤ Q2 2013 Held for 12y 5m+	$397.7M
First Light Asset Management, LLC Hedge Fund•Sector	Mathew Paul Arens CEO	2.96% $31.4M	1.79% 890.4K shares	Q4 2013 Held for 11y 11m	$1.1B
H HighMark Wealth Management LLC RIA/Wealth	Todd Edward Arens Managing Partner	1.30% $3.0M	0.17% 83.7K shares	Q2 2020 Held for 5y 5m	$227.1M
Hood River Capital Management LLC Long Only Manager	Brian Paul Smoluch Managing Partner	1.27% $107.4M	6.13% 3.0M shares	Q3 2023 Held for 2y 2m	$8.5B
Riverwater Partners LLC RIA/Wealth	Adam Jonathan Peck CIO	0.88% $2.1M	0.12% 60.3K shares	Q2 2025 Held for 5 months	$240.9M
PERKINS CAPITAL MANAGEMENT INC RIA/Wealth	Harry Allen Lee Lindberg President	0.86% $978.2K	0.06% 27.8K shares	Q3 2020 Held for 5y 2m	$113.5M
K Knott David M Jr Institution	-	0.71% $1.7M	0.10% 48.0K shares	Q1 2025 Held for 8 months	$238.7M
Semanteon Capital Management, LP Hedge Fund•Long/Short	Rajat Lal Managing Partner	0.71% $564.0K	0.03% 16.0K shares	Q3 2025 Held for 2 months	$79.7M
OSTERWEIS CAPITAL MANAGEMENT INC Long Only Manager	Carl Philip Kaufman CEO	0.67% $11.4M	0.65% 322.1K shares	Q1 2025 Held for 8 months	$1.7B
KENNEDY CAPITAL MANAGEMENT, INC. Long Only Manager	Donald M Cobin CEO	0.65% $29.5M	1.68% 836.9K shares	Q1 2020 Held for 5y 8m	$4.5B

Hedge Fund Spotlight

Discover hedge funds investing in ATRC

First Light Asset Management, LLC

Hedge Fund • Sector

Portfolio ManagerMathew Paul Arens

Portfolio Value: $1.1B
Positions: 41
Last Reported: Q3 2025

Sector Allocation

Position in AtriCure

Market Value: $31.4M
Shares Held: 890.4K
Portfolio Weight: 2.96%
Owned Since: 2013-Q4

Top Holding	Sector	Market Value	Weight
1 Axogen AXGN	Medical - Devices Healthcare	$103.6M	9.76%
2 PHLT Performant Healthcare PHLT	Unknown Unknown	$90.6M	8.54%
3 CNTA Centessa Pharmaceuticals CNTA	Unknown Unknown	$88.2M	8.31%

View full profile

AtriCure

Overview

All Institutions

Hedge Funds

Ownership Breakdown

Biggest Investors

Net Capital Flow

Biggest Buyers

Biggest Sellers

Entry and Exit Activity

New Positions

Exited Positions

Options Activity

Call Positions

Put Positions

Most Committed Institutions

Hedge Fund Spotlight

Position in AtriCure

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