AI Holders Summary · Q1 2026

151 institutions reported BCAX in Q1 2026. RA CAPITAL MANAGEMENT, L.P. leads at 12.2% 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

RA CAPITAL MANAGEMENT, L.P.

CIK 0001346824

$144M7.3M1.53%Q1 2026 02

T. Rowe Price Investment Management, Inc.

CIK 0001897612

$131M6.6M0.09%Q1 2026 03

Siren, L.L.C.

CIK 0002005245

$115M5.8M3.20%Q1 2026 04

Vestal Point Capital, LP

CIK 0001974915

$108M5.4M3.02%Q1 2026 05

Red Tree Management, LLC

CIK 0002055980

$94M3.2M63.77%Q2 2026 06

Deep Track Capital, LP

CIK 0001856083

$81M4.1M1.32%Q1 2026 07

JANUS HENDERSON GROUP PLC

CIK 0001274173

$66M3.3M0.03%Q1 2026 08

TPG GP A, LLC

CIK 0001903793

$60M3.0M1.63%Q1 2026 09

BlackRock, Inc.

CIK 0002012383

$57M2.8M0.00%Q1 2026 10

Omega Fund Management, LLC

CIK 0001637359

$48M2.4M29.16%Q1 2026 11

Royalty Pharma Sub-Manager, LLC

CIK 0002081668

$47M2.4M27.02%Q1 2026 12

FMR LLC

CIK 0000315066

$42M2.1M0.00%Q1 2026 13

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$35M1.8M0.00%Q1 2026 14

FRANKLIN RESOURCES INC

CIK 0000038777

$32M1.6M0.01%Q1 2026 15

STATE STREET CORP

CIK 0000093751

$28M1.4M0.00%Q1 2026 16

PRICE T ROWE ASSOCIATES INC /MD/

CIK 0000080255

$27M1.4M0.00%Q1 2026 17

Jones Hill Capital LP

CIK 0002102314

$25M1.3M5.37%Q1 2026 18

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$17M831K0.00%Q1 2026 19

FIL Ltd

CIK 0000318989

$14M680K0.01%Q1 2026 20

CITADEL ADVISORS LLC

CIK 0001423053

$13M797K0.00%Q4 2025

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