AI Holders Summary · Q1 2026

165 institutions reported VSTM in Q1 2026. RTW INVESTMENTS, LP leads at 10.5% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(2 on this page)

#HolderValueShares% port.Quarter

RTW INVESTMENTS, LP

CIK 0001493215

$35M6.6M0.35%Q1 2026 02

BlackRock, Inc.

CIK 0002012383

$33M6.2M0.00%Q1 2026 03

Deep Track Capital, LP

CIK 0001856083

$30M5.7M0.50%Q1 2026 04

ARMISTICE CAPITAL, LLC

CIK 0001601086

$24M4.6M0.43%Q1 2026 05

Foresite Capital Management VI LLC

CIK 0002013341

$24M3.1M7.32%Q4 2025 06

Nantahala Capital Management, LLC

CIK 0001472322

$19M3.6M0.70%Q1 2026 07

CITADEL ADVISORS LLC

CIK 0001423053

$19M2.4M0.00%Q4 2025 08

STATE STREET CORP

CIK 0000093751

$19M3.5M0.00%Q1 2026 09

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$18M3.3M0.00%Q1 2026 10

Stonepine Capital Management, LLC

CIK 0001440771

$18M3.3M7.01%Q1 2026 11

MILLENNIUM MANAGEMENT LLC

CIK 0001273087

$13M2.4M0.01%Q1 2026 12

MORGAN STANLEY

CIK 0000895421

$12M2.2M0.00%Q1 2026 13

Rosalind Advisors, Inc.

CIK 0001622627

$11M2.1M4.55%Q1 2026 14

AIGH Capital Management LLC

CIK 0001835943

$11M2.0M1.45%Q1 2026 15

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$9M1.7M0.00%Q1 2026 16

J. Goldman & Co LP

CIK 0001412741

$9M1.7M0.26%Q1 2026 17

GOLDMAN SACHS GROUP INC

CIK 0000886982

$8M1.5M0.00%Q1 2026 18

Qube Research & Technologies Ltd

CIK 0001729829

$8M1.5M0.01%Q1 2026 19

ACORN CAPITAL ADVISORS, LLC

CIK 0002054410

$8M1.5M2.21%Q1 2026 20

NEXTBio Capital Management LP

CIK 0002038158

$7M1.3M3.22%Q1 2026

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