AI Holders Summary · Q2 2026

154 institutions reported JBIO in Q2 2026. FMR LLC leads at 16.0% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

Hide index funds / market makers / custodians(1 on this page)

#HolderValueShares% port.Quarter

FMR LLC

CIK 0000315066

$203M9.1M0.01%Q2 2026 02

Jupiter Topco LLC

CIK 0002146052

$139M6.3M0.06%Q2 2026 03

Fairmount Funds Management LLC

CIK 0001802528

$101M4.6M6.69%Q2 2026 04

RA CAPITAL MANAGEMENT, L.P.

CIK 0001346824

$82M3.7M0.71%Q2 2026 05

Bellevue Group AG

CIK 0001674546

$68M3.1M1.43%Q2 2026 06

Paradigm Biocapital Advisors LP

CIK 0001855655

$63M2.9M1.19%Q2 2026 07

BlackRock, Inc.

CIK 0002012383

$62M2.8M0.00%Q2 2026 08

FRANKLIN RESOURCES INC

CIK 0000038777

$62M2.8M0.01%Q2 2026 09

Avidity Partners Management LP

CIK 0001791827

$54M2.8M5.76%Q1 2026 10

STATE STREET CORP

CIK 0000093751

$52M2.3M0.00%Q2 2026 11

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$50M2.2M0.00%Q2 2026 12

VR Adviser, LLC

CIK 0001615982

$50M3.2M2.45%Q4 2025 13

JANUS HENDERSON GROUP PLC

CIK 0001274173

$44M3.1M0.02%Q1 2026 14

ADAGE CAPITAL PARTNERS GP, L.L.C.

CIK 0001165408

$42M1.9M0.06%Q2 2026 15

Polar Capital Holdings Plc

CIK 0001837309

$41M1.8M0.10%Q2 2026 16

Remedium Capital Partners, LLC

CIK 0002104501

$35M1.6M7.76%Q2 2026 17

Soleus Capital Management, L.P.

CIK 0001802630

$34M1.6M1.19%Q2 2026 18

JPMORGAN CHASE & CO

CIK 0000019617

$33M1.5M0.00%Q2 2026 19

BAKER BROS. ADVISORS LP

CIK 0001263508

$25M1.6M0.15%Q4 2025 20

Logos Global Management LP

CIK 0001792126

$25M1.1M1.08%Q2 2026

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