AI Holders Summary · Q1 2026

88 institutions reported IRD in Q1 2026. Caligan Partners LP leads at 14.6% 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

Caligan Partners LP

CIK 0001727492

$28M6.1M1.84%Q1 2026 02

ADAGE CAPITAL PARTNERS GP, L.L.C.

CIK 0001165408

$27M6.0M0.04%Q1 2026 03

BIOS Capital Management, LP

CIK 0001813845

$17M3.7M31.70%Q1 2026 04

BlackRock, Inc.

CIK 0002012383

$13M3.1M0.00%Q2 2026 05

BALYASNY ASSET MANAGEMENT L.P.

CIK 0001218710

$12M2.7M0.02%Q1 2026 06

MILLENNIUM MANAGEMENT LLC

CIK 0001273087

$12M2.6M0.01%Q1 2026 07

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$11M2.4M0.00%Q1 2026 08

Boxer Capital Management, LLC

CIK 0002018299

$10M2.3M1.34%Q1 2026 09

ADAR1 Capital Management, LLC

CIK 0001940272

$8M1.8M0.50%Q1 2026 10

PERCEPTIVE ADVISORS LLC

CIK 0001224962

$8M1.8M0.16%Q1 2026 11

Nantahala Capital Management, LLC

CIK 0001472322

$8M1.7M0.28%Q1 2026 12

Woodline Partners LP

CIK 0001784547

$6M1.4M0.02%Q1 2026 13

BOOTHBAY FUND MANAGEMENT, LLC

CIK 0001549230

$5M1.2M0.07%Q1 2026 14

FARALLON CAPITAL MANAGEMENT LLC

CIK 0000909661

$5M1.0M0.03%Q1 2026 15

SUSQUEHANNA INTERNATIONAL GROUP, LLP

CIK 0001446194· Market maker

$4M905K0.00%Q1 2026 16

Bleichroeder LP

CIK 0001781002

$3M737K0.58%Q1 2026 17

STATE STREET CORP

CIK 0000093751

$3M790K0.00%Q2 2026 18

Mink Brook Asset Management LLC

CIK 0002052205

$3M591K1.50%Q1 2026 19

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$2M538K0.00%Q1 2026 20

Opaleye Management Inc.

CIK 0001595855

$2M1.1M0.30%Q4 2025

Page 1 of 5

68 more holders available. Log in →