AI Holders Summary · Q1 2026

238 institutions reported ATRC in Q1 2026. ALLIANCEBERNSTEIN L.P. leads at 12.6% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(4 on this page)

#HolderValueShares% port.Quarter

ALLIANCEBERNSTEIN L.P.

CIK 0001109448

$129M3.3M0.04%Q1 2026 02

BlackRock, Inc.

CIK 0002012383

$115M4.0M0.00%Q1 2026 03

WELLINGTON MANAGEMENT GROUP LLP

CIK 0000902219

$97M3.4M0.02%Q1 2026 04

Hood River Capital Management LLC

CIK 0001578177

$89M3.1M0.89%Q1 2026 05

Vanguard Portfolio Management

CIK 0002100121· Index

$77M2.7M0.00%Q1 2026 06

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$62M2.2M0.00%Q1 2026 07

Delaware Management Holdings, Inc.

CIK 0000921739

$51M1.8M0.09%Q1 2026 08

GOLDMAN SACHS GROUP INC

CIK 0000886982

$48M1.7M0.01%Q1 2026 09

STATE STREET CORP

CIK 0000093751

$37M1.3M0.00%Q1 2026 10

MARSHALL WACE, LLP

CIK 0001318757

$36M913K0.03%Q4 2025 11

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$35M1.2M0.00%Q1 2026 12

Divisadero Street Capital Management, LP

CIK 0001901865

$33M1.2M1.38%Q1 2026 13

BNP Paribas Asset Management Holding S.A.

CIK 0001520354

$30M1.1M0.04%Q1 2026 14

Neuberger Berman Group LLC

CIK 0001465109

$30M1.1M0.02%Q1 2026 15

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$28M998K0.01%Q1 2026 16

Champlain Investment Partners, LLC

CIK 0001315478

$28M971K0.35%Q1 2026 17

GW&K Investment Management, LLC

CIK 0001082917

$27M963K0.24%Q1 2026 18

KENNEDY CAPITAL MANAGEMENT LLC

CIK 0000884589

$24M834K0.50%Q1 2026 19

BANK OF AMERICA CORP /DE/

CIK 0000070858

$22M769K0.00%Q1 2026 20

TWO SIGMA INVESTMENTS, LP

CIK 0001179392

$21M751K0.02%Q1 2026

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