AI Holders Summary · Q1 2026

66 institutions reported BBOT in Q1 2026. Cormorant Asset Management, LP leads at 31.9% 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

Cormorant Asset Management, LP

CIK 0001583977

$160M17.9M8.04%Q1 2026 02

DEERFIELD MANAGEMENT COMPANY, L.P.

CIK 0001009258

$61M4.9M0.78%Q4 2025 03

CITADEL ADVISORS LLC

CIK 0001423053

$32M2.5M0.00%Q4 2025 04

Omega Fund Management, LLC

CIK 0001637359

$29M3.3M18.05%Q1 2026 05

Alphabet Inc.

CIK 0001652044

$25M2.8M0.63%Q1 2026 06

EcoR1 Capital, LLC

CIK 0001587114

$25M2.8M1.07%Q1 2026 07

WELLINGTON MANAGEMENT GROUP LLP

CIK 0000902219

$25M2.8M0.00%Q1 2026 08

Novo Holdings A/S

CIK 0001388325

$25M2.0M1.91%Q4 2025 09

Enavate Sciences GP, LLC

CIK 0001953107

$24M2.6M6.69%Q1 2026 10

BlackRock, Inc.

CIK 0002012383

$19M2.1M0.00%Q1 2026 11

Laurion Capital Management LP

CIK 0001390202

$17M1.9M0.75%Q1 2026 12

ARMISTICE CAPITAL, LLC

CIK 0001601086

$12M1.3M0.21%Q1 2026 13

Aisling Capital Management LP

CIK 0001766721

$9M1.0M1.91%Q1 2026 14

Paradigm Biocapital Advisors LP

CIK 0001855655

$8M868K0.16%Q1 2026 15

Octagon Capital Advisors LP

CIK 0001839435

$6M719K0.71%Q1 2026 16

ROYCE & ASSOCIATES LP

CIK 0000906304

$6M637K0.06%Q1 2026 17

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$5M579K0.00%Q1 2026 18

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$5M538K0.00%Q1 2026 19

EVENTIDE ASSET MANAGEMENT, LLC

CIK 0001442891

$5M541K0.08%Q1 2026 20

PRICE T ROWE ASSOCIATES INC /MD/

CIK 0000080255

$4M438K0.00%Q1 2026

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