AI Holders Summary · Q2 2026

100 institutions reported IRD in Q2 2026. Caligan Partners LP leads at 12.1% 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

Caligan Partners LP

CIK 0001727492

$25M6.1M1.18%Q2 2026 02

ADAGE CAPITAL PARTNERS GP, L.L.C.

CIK 0001165408

$25M6.0M0.03%Q2 2026 03

BIOS Capital Management, LP

CIK 0001813845

$15M3.7M36.33%Q2 2026 04

BlackRock, Inc.

CIK 0002012383

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

BALYASNY ASSET MANAGEMENT L.P.

CIK 0001218710

$13M3.1M0.02%Q2 2026 06

Nantahala Capital Management, LLC

CIK 0001472322

$13M3.1M0.42%Q2 2026 07

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$12M3.0M0.00%Q2 2026 08

Boxer Capital Management, LLC

CIK 0002018299

$12M2.8M0.87%Q2 2026 09

Trails Edge Capital Partners, LP

CIK 0002077247

$11M2.7M1.79%Q2 2026 10

MILLENNIUM MANAGEMENT LLC

CIK 0001273087

$9M2.3M0.00%Q2 2026 11

PERCEPTIVE ADVISORS LLC

CIK 0001224962

$8M1.8M0.16%Q1 2026 12

MARSHALL WACE, LLP

CIK 0001318757

$8M1.9M0.01%Q2 2026 13

ADAR1 Capital Management, LLC

CIK 0001940272

$7M1.8M0.34%Q2 2026 14

GOLDMAN SACHS GROUP INC

CIK 0000886982

$6M1.5M0.00%Q2 2026 15

Woodline Partners LP

CIK 0001784547

$6M1.4M0.02%Q2 2026 16

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$6M1.4M0.00%Q2 2026 17

BOOTHBAY FUND MANAGEMENT, LLC

CIK 0001549230

$5M1.2M0.06%Q2 2026 18

Opaleye Management Inc.

CIK 0001595855

$5M1.1M0.42%Q2 2026 19

SummitTX Capital, L.P.

CIK 0002052310

$4M1.0M0.11%Q2 2026 20

STATE STREET CORP

CIK 0000093751

$3M790K0.00%Q2 2026

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