AI Holders Summary · Q1 2026

311 institutions reported ADPT in Q1 2026. VIKING GLOBAL INVESTORS LP leads at 20.9% 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

VIKING GLOBAL INVESTORS LP

CIK 0001103804

$416M30.0M1.16%Q1 2026 02

BlackRock, Inc.

CIK 0002012383

$325M15.1M0.00%Q2 2026 03

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$137M6.4M0.00%Q2 2026 04

WELLINGTON MANAGEMENT GROUP LLP

CIK 0000902219

$127M5.9M0.02%Q2 2026 05

Vanguard Portfolio Management

CIK 0002100121· Index

$117M5.5M0.01%Q2 2026 06

WESTFIELD CAPITAL MANAGEMENT CO LP

CIK 0001177719

$92M4.3M0.30%Q2 2026 07

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$78M3.6M0.00%Q2 2026 08

STATE STREET CORP

CIK 0000093751

$74M3.5M0.00%Q2 2026 09

UBS Group AG

CIK 0001610520

$67M3.1M0.01%Q2 2026 10

Invesco Ltd.

CIK 0000914208

$66M3.1M0.01%Q2 2026 11

GOLDMAN SACHS GROUP INC

CIK 0000886982

$64M3.0M0.01%Q2 2026 12

DRIEHAUS CAPITAL MANAGEMENT LLC

CIK 0000938206

$54M2.5M0.31%Q2 2026 13

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

CIK 0001164508

$54M2.5M0.02%Q2 2026 14

Nuveen, LLC

CIK 0001871926

$51M2.4M0.01%Q2 2026 15

LORD, ABBETT & CO. LLC

CIK 0000728100

$49M3.5M0.16%Q1 2026 16

BNP Paribas Asset Management Holding S.A.

CIK 0001520354

$47M2.2M0.05%Q2 2026 17

SUSQUEHANNA INTERNATIONAL GROUP, LLP

CIK 0001446194· Market maker

$47M2.2M0.00%Q2 2026 18

ARK Investment Management LLC

CIK 0001697748

$45M2.1M0.29%Q2 2026 19

Delaware Management Holdings, Inc.

CIK 0000921739

$41M1.9M0.06%Q2 2026 20

Aristotle Atlantic Partners, LLC

CIK 0001697267

$39M1.8M1.64%Q2 2026

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