AI Holders Summary · Q2 2026

222 institutions reported IRWD in Q2 2026. BlackRock, Inc. leads at 14.4% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(5 on this page)

#HolderValueShares% port.Quarter

BlackRock, Inc.

CIK 0002012383

$75M17.8M0.00%Q2 2026 02

ARMISTICE CAPITAL, LLC

CIK 0001601086

$59M13.9M0.72%Q2 2026 03

STATE STREET CORP

CIK 0000093751

$37M8.8M0.00%Q2 2026 04

BANK OF AMERICA CORP /DE/

CIK 0000070858

$37M8.7M0.00%Q2 2026 05

RENAISSANCE TECHNOLOGIES LLC

CIK 0001037389

$34M8.0M0.05%Q2 2026 06

Sarissa Capital Management LP

CIK 0001577524

$32M9.2M20.46%Q1 2026 07

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$28M6.6M0.00%Q2 2026 08

AQR CAPITAL MANAGEMENT LLC

CIK 0001167557

$27M6.5M0.01%Q2 2026 09

Vanguard Portfolio Management

CIK 0002100121· Index

$23M5.5M0.00%Q2 2026 10

ACADIAN ASSET MANAGEMENT LLC

CIK 0000916542

$23M6.6M0.03%Q1 2026 11

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$20M4.8M0.00%Q2 2026 12

TWO SIGMA INVESTMENTS, LP

CIK 0001179392

$19M4.6M0.01%Q2 2026 13

MARSHALL WACE, LLP

CIK 0001318757

$18M4.3M0.01%Q2 2026 14

GOLDMAN SACHS GROUP INC

CIK 0000886982

$14M3.3M0.00%Q2 2026 15

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

CIK 0000884546· Index

$14M3.3M0.00%Q2 2026 16

FEDERATED HERMES, INC.

CIK 0001056288

$14M3.2M0.02%Q2 2026 17

JACOBS LEVY EQUITY MANAGEMENT, INC

CIK 0000884414

$13M3.6M0.05%Q1 2026 18

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

CIK 0001164508

$13M3.0M0.01%Q2 2026 19

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$11M2.5M0.00%Q2 2026 20

TWO SIGMA ADVISERS, LP

CIK 0001478735

$11M3.1M0.02%Q4 2025

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