AI Holders Summary · Q1 2026

327 institutions reported MIRM in Q1 2026. Frazier Life Sciences Management, L.P. leads at 18.9% 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

Frazier Life Sciences Management, L.P.

CIK 0001892134

$709M7.7M18.25%Q1 2026 02

JANUS HENDERSON GROUP PLC

CIK 0001274173

$642M6.9M0.31%Q1 2026 03

BlackRock, Inc.

CIK 0002012383

$355M3.8M0.01%Q1 2026 04

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$223M2.4M0.01%Q1 2026 05

FMR LLC

CIK 0000315066

$182M2.0M0.01%Q1 2026 06

STATE STREET CORP

CIK 0000093751

$180M1.9M0.01%Q1 2026 07

PRICE T ROWE ASSOCIATES INC /MD/

CIK 0000080255

$159M1.7M0.02%Q1 2026 08

Vanguard Portfolio Management

CIK 0002100121· Index

$132M1.4M0.01%Q1 2026 09

EVENTIDE ASSET MANAGEMENT, LLC

CIK 0001442891

$130M1.4M2.15%Q1 2026 10

WELLINGTON MANAGEMENT GROUP LLP

CIK 0000902219

$123M1.3M0.02%Q1 2026 11

BVF INC/IL

CIK 0001056807

$118M1.5M3.98%Q4 2025 12

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$116M1.3M0.01%Q1 2026 13

TANG CAPITAL MANAGEMENT LLC

CIK 0001232621

$114M1.2M5.80%Q1 2026 14

Novo Holdings A/S

CIK 0001388325

$100M1.3M7.75%Q4 2025 15

TCG Crossover Management, LLC

CIK 0001839948

$98M1.1M2.81%Q1 2026 16

BNP PARIBAS FINANCIAL MARKETS

CIK 0001166588

$84M911K0.04%Q1 2026 17

Rock Springs Capital Management LP

CIK 0001595725

$75M811K4.42%Q1 2026 18

D. E. Shaw & Co., Inc.

CIK 0001009207

$75M948K0.04%Q4 2025 19

TWO SIGMA INVESTMENTS, LP

CIK 0001179392

$72M775K0.06%Q1 2026 20

CITADEL ADVISORS LLC

CIK 0001423053

$67M853K0.01%Q4 2025

Page 1 of 17

307 more holders available. Log in →