AI Holders Summary · Q2 2026

227 institutions reported ANAB in Q2 2026. EcoR1 Capital, LLC leads at 36.0% 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

EcoR1 Capital, LLC

CIK 0001587114

$532M7.9M25.86%Q2 2026 02

BlackRock, Inc.

CIK 0002012383

$124M1.8M0.00%Q2 2026 03

STATE STREET CORP

CIK 0000093751

$87M1.3M0.00%Q2 2026 04

TANG CAPITAL MANAGEMENT LLC

CIK 0001232621

$74M1.3M3.75%Q1 2026 05

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$61M906K0.00%Q2 2026 06

Affinity Asset Advisors, LLC

CIK 0001773195

$56M826K2.52%Q2 2026 07

MILLENNIUM MANAGEMENT LLC

CIK 0001273087

$56M822K0.02%Q2 2026 08

Sanofi

CIK 0001121404

$55M822K10.39%Q2 2026 09

Woodline Partners LP

CIK 0001784547

$48M717K0.15%Q2 2026 10

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$43M638K0.00%Q2 2026 11

Palo Alto Investors LP

CIK 0001306923

$41M603K5.63%Q2 2026 12

GOLDMAN SACHS GROUP INC

CIK 0000886982

$39M584K0.00%Q2 2026 13

First Light Asset Management, LLC

CIK 0001600004

$39M582K2.39%Q2 2026 14

Vanguard Portfolio Management

CIK 0002100121· Index

$36M528K0.00%Q2 2026 15

Sofinnova Investments, Inc.

CIK 0001631134

$33M494K1.72%Q2 2026 16

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

CIK 0001164508

$33M489K0.01%Q2 2026 17

D. E. Shaw & Co., Inc.

CIK 0001009207

$32M670K0.02%Q4 2025 18

683 Capital Management, LLC

CIK 0001404574

$31M648K1.37%Q4 2025 19

Nuveen, LLC

CIK 0001871926

$28M421K0.01%Q2 2026 20

BANK OF AMERICA CORP /DE/

CIK 0000070858

$28M418K0.00%Q2 2026

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