13F Insight
DOSSIER · 13F Holders · Q1 2026Healthcare · Surgical & Medical Instruments & ApparatusBellwetherCompounder
ATRC

ATRICURE INC

232 institutions still hold ATRICURE INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 04963C209·Surgical & Medical Instruments & Apparatus·232 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 4.9%
vs prior quarter
13F value held
$1.0B
59.0% inst. owned
of float
Holders
232
+102 QoQ
filers reporting
Activity
+66 / −34
+731 added · −718 reduced
this quarter
Concentration
12.73%
ALLIANCEBERNSTEIN L.P. #1
top holder share
AI Holders Summary · Q1 2026

232 institutions reported ATRC in Q1 2026. ALLIANCEBERNSTEIN L.P. leads at 12.7% of the visible book. +102 net new institutions vs prior quarter — accumulation reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
ALLIANCEBERNSTEIN L.P.
CIK 0001109448
$129M3.3M0.04%Q1 202602
BlackRock, Inc.
CIK 0002012383
$115M4.0M0.00%Q1 202603
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$97M3.4M0.02%Q1 202604
Hood River Capital Management LLC
CIK 0001578177
$89M3.1M0.89%Q1 202605
Vanguard Portfolio Management
CIK 0002100121
$77M2.7M0.00%Q1 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$62M2.2M0.00%Q1 202607
Delaware Management Holdings, Inc.
CIK 0000921739
$51M1.8M0.09%Q1 202608
GOLDMAN SACHS GROUP INC
CIK 0000886982
$48M1.7M0.01%Q1 202609
STATE STREET CORP
CIK 0000093751
$37M1.3M0.00%Q1 202610
MARSHALL WACE, LLP
CIK 0001318757
$36M913K0.03%Q4 202511
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$35M1.2M0.00%Q1 202612
Divisadero Street Capital Management, LP
CIK 0001901865
$33M1.2M1.38%Q1 202613
BNP Paribas Asset Management Holding S.A.
CIK 0001520354
$30M1.1M0.04%Q1 202614
Neuberger Berman Group LLC
CIK 0001465109
$30M1.1M0.02%Q1 202615
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$28M998K0.01%Q1 202616
Champlain Investment Partners, LLC
CIK 0001315478
$28M971K0.35%Q1 202617
KENNEDY CAPITAL MANAGEMENT LLC
CIK 0000884589
$24M834K0.50%Q1 202618
BANK OF AMERICA CORP /DE/
CIK 0000070858
$22M769K0.00%Q1 202619
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$21M751K0.02%Q1 202620
First Light Asset Management, LLC
CIK 0001600004
$21M730K1.87%Q1 2026
Page 1 of 12
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