Stock Ownership/ATRC

ATRICURE INC (ATRC): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in ATRC · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
18
13F filers
Aggregate Value
$174.3M
Across holders
Last Price
$49.28
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity10 increased8 reduced3 exited
Full exits: CAXTON ASSOCIATES LLP, BALYASNY ASSET MANAGEMENT LLC, MILLENNIUM MANAGEMENT LLC
Institutional Holders of ATRC
↗
18 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund1.33M$37.3M21.4%0.0%Reduced+$34.1MQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund1.30M$36.3M20.8%0.0%Added+$28.5MQ2 2026
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund604K$16.9M9.7%0.0%Added—Q2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund561K$15.7M9.0%0.0%Added+$3.0MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund544K$15.2M8.7%0.0%Added+$15.1MQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund526K$14.7M8.4%0.0%Reduced$-6.3MQ2 2026
First Eagle Investment Management, LLC
CIK 0001325447
Institutional Manager298K$8.3M4.8%0.0%Added+$993KQ2 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund234K$6.6M3.8%0.0%Reduced$-2.1MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund193K$5.4M3.1%0.0%Added+$3.8MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund177K$5.0M2.8%0.0%Added+$4.4MQ2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$37.3M· 21.4% of total· 0.0% port· 1.33M sh· +$34.1M QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded
Hedge Fund
$36.3M· 20.8% of total· 0.0% port· 1.30M sh· +$28.5M QoQ· Q2 2026
Point72 Asset Management, L.P.Added
Hedge Fund
$16.9M· 9.7% of total· 0.0% port· 604K sh· — QoQ· Q2 2026
Qube Research & Technologies LtdAdded
Hedge Fund
$15.7M· 9.0% of total· 0.0% port· 561K sh· +$3.0M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$15.2M· 8.7% of total· 0.0% port· 544K sh· +$15.1M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$14.7M· 8.4% of total· 0.0% port· 526K sh· $-6.3M QoQ· Q2 2026
First Eagle Investment Management, LLCAdded
Institutional Manager
$8.3M· 4.8% of total· 0.0% port· 298K sh· +$993K QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$6.6M· 3.8% of total· 0.0% port· 234K sh· $-2.1M QoQ· Q2 2026
SHAW D E & CO INCAdded
Hedge Fund
$5.4M· 3.1% of total· 0.0% port· 193K sh· +$3.8M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$5.0M· 2.8% of total· 0.0% port· 177K sh· +$4.4M QoQ· Q2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Reduced
Hedge Fund
$2.8M· 1.6% of total· 0.0% port· 100K sh· $-1.4M QoQ· Q2 2026
ExodusPoint Capital Management, LPAdded
Hedge Fund
$2.4M· 1.4% of total· 0.0% port· 86K sh· — QoQ· Q2 2026
Bridgewater Associates, LPAdded
Hedge Fund
$2.1M· 1.2% of total· 0.0% port· 76K sh· +$1.2M QoQ· Q2 2026
Schonfeld Strategic Advisors LLCReduced
Hedge Fund
$1.9M· 1.1% of total· 0.0% port· 68K sh· $-936K QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$1.5M· 0.9% of total· 0.0% port· 54K sh· +$1.3M QoQ· Q2 2026
VOLORIDGE INVESTMENT MANAGEMENT, LLCReduced
Hedge Fund
$1.4M· 0.8% of total· 0.0% port· 51K sh· $-1.3M QoQ· Q2 2026
Man Group plcReduced
Hedge Fund
$684K· 0.4% of total· 0.0% port· 24K sh· $-1.4M QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$98K· 0.1% of total· 0.0% port· 4K sh· $-244K QoQ· Q2 2026
1–10 of 18
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