AI Holders Summary · Q2 2026

209 institutions reported JANX in Q2 2026. RA CAPITAL MANAGEMENT, L.P. leads at 23.0% 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

RA CAPITAL MANAGEMENT, L.P.

CIK 0001346824

$172M11.2M1.49%Q2 2026 02

BlackRock, Inc.

CIK 0002012383

$94M6.1M0.00%Q2 2026 03

JANUS HENDERSON GROUP PLC

CIK 0001274173

$58M4.2M0.03%Q1 2026 04

Prosight Management, LP

CIK 0001617201

$49M3.5M8.09%Q1 2026 05

STATE STREET CORP

CIK 0000093751

$46M3.0M0.00%Q2 2026 06

FMR LLC

CIK 0000315066

$37M2.4M0.00%Q2 2026 07

FEDERATED HERMES, INC.

CIK 0001056288

$36M2.4M0.05%Q2 2026 08

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$29M1.9M0.00%Q2 2026 09

TCG Crossover Management, LLC

CIK 0001839948

$27M1.8M0.66%Q2 2026 10

Alyeska Investment Group, L.P.

CIK 0001453072

$25M1.6M0.07%Q2 2026 11

WELLINGTON MANAGEMENT GROUP LLP

CIK 0000902219

$23M1.5M0.00%Q2 2026 12

Vanguard Portfolio Management

CIK 0002100121· Index

$20M1.3M0.00%Q2 2026 13

TWO SIGMA INVESTMENTS, LP

CIK 0001179392

$19M1.2M0.01%Q2 2026 14

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$18M1.2M0.00%Q2 2026 15

ALGERT GLOBAL LLC

CIK 0001275218

$17M1.1M0.20%Q2 2026 16

CITADEL ADVISORS LLC

CIK 0001423053

$17M1.2M0.00%Q4 2025 17

Point72 Asset Management, L.P.

CIK 0001603466

$16M1.2M0.02%Q1 2026 18

GOLDMAN SACHS GROUP INC

CIK 0000886982

$15M953K0.00%Q2 2026 19

BANK OF AMERICA CORP /DE/

CIK 0000070858

$14M910K0.00%Q2 2026 20

MORGAN STANLEY

CIK 0000895421

$13M837K0.00%Q2 2026

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