AI Holders Summary · Q1 2026

305 institutions reported ADPT in Q1 2026. VIKING GLOBAL INVESTORS LP leads at 26.5% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(3 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

$85M6.1M0.00%Q1 2026 04

WESTFIELD CAPITAL MANAGEMENT CO LP

CIK 0001177719

$75M5.4M0.32%Q1 2026 05

STATE STREET CORP

CIK 0000093751

$74M3.5M0.00%Q2 2026 06

Vanguard Portfolio Management

CIK 0002100121· Index

$62M4.5M0.00%Q1 2026 07

Invesco Ltd.

CIK 0000914208

$62M4.5M0.01%Q1 2026 08

WELLINGTON MANAGEMENT GROUP LLP

CIK 0000902219

$54M3.9M0.01%Q1 2026 09

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$50M3.6M0.00%Q1 2026 10

LORD, ABBETT & CO. LLC

CIK 0000728100

$49M3.5M0.16%Q1 2026 11

GOLDMAN SACHS GROUP INC

CIK 0000886982

$45M3.2M0.01%Q1 2026 12

AMERIPRISE FINANCIAL INC

CIK 0000820027

$42M3.0M0.01%Q1 2026 13

BNP Paribas Asset Management Holding S.A.

CIK 0001520354

$37M2.7M0.04%Q1 2026 14

D. E. Shaw & Co., Inc.

CIK 0001009207

$31M1.9M0.02%Q4 2025 15

ARK Investment Management LLC

CIK 0001697748

$29M2.1M0.23%Q1 2026 16

FRED ALGER MANAGEMENT, LLC

CIK 0000003520

$29M2.1M0.13%Q1 2026 17

Sumitomo Mitsui Trust Group, Inc.

CIK 0001475365

$29M1.3M0.02%Q2 2026 18

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

CIK 0001164508

$28M2.0M0.01%Q1 2026 19

Delaware Management Holdings, Inc.

CIK 0000921739

$26M1.9M0.04%Q1 2026 20

DRIEHAUS CAPITAL MANAGEMENT LLC

CIK 0000938206

$24M1.8M0.18%Q1 2026

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