AI Holders Summary · Q1 2026

696 institutions reported INSM in Q1 2026. JPMORGAN CHASE & CO leads at 15.3% 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

JPMORGAN CHASE & CO

CIK 0000019617

$3.7B24.2M0.24%Q1 2026 02

BlackRock, Inc.

CIK 0002012383

$2.7B16.7M0.05%Q1 2026 03

Darwin Global Management, Ltd.

CIK 0001839209

$2.6B16.8M68.33%Q1 2026 04

FMR LLC

CIK 0000315066

$2.2B13.2M0.11%Q1 2026 05

Vanguard Portfolio Management

CIK 0002100121· Index

$1.7B10.4M0.09%Q1 2026 06

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$1.6B9.6M0.04%Q1 2026 07

BAKER BROS. ADVISORS LP

CIK 0001263508

$1.1B6.6M6.72%Q4 2025 08

Artisan Partners Limited Partnership

CIK 0001466153

$1.1B6.5M1.71%Q1 2026 09

Invesco Ltd.

CIK 0000914208

$1.1B6.5M0.10%Q1 2026 10

Capital International Investors

CIK 0001562230

$915M5.6M0.21%Q1 2026 11

STATE STREET CORP

CIK 0000093751

$908M5.6M0.03%Q1 2026 12

RTW INVESTMENTS, LP

CIK 0001493215

$792M4.8M7.88%Q1 2026 13

D. E. Shaw & Co., Inc.

CIK 0001009207

$760M4.4M0.42%Q4 2025 14

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$733M4.5M0.05%Q1 2026 15

PRICE T ROWE ASSOCIATES INC /MD/

CIK 0000080255

$506M3.1M0.06%Q1 2026 16

AMERIPRISE FINANCIAL INC

CIK 0000820027

$500M3.1M0.12%Q1 2026 17

FRANKLIN RESOURCES INC

CIK 0000038777

$428M2.6M0.10%Q1 2026 18

NWI MANAGEMENT LP

CIK 0001103887

$332M2.0M9.43%Q1 2026 19

CITADEL ADVISORS LLC

CIK 0001423053

$315M1.8M0.05%Q4 2025 20

Orbis Allan Gray Ltd

CIK 0001663865

$306M1.9M1.29%Q1 2026

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