AI Holders Summary · Q1 2026

303 institutions reported PRAX in Q1 2026. JANUS HENDERSON GROUP PLC leads at 14.5% 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

JANUS HENDERSON GROUP PLC

CIK 0001274173

$1.1B3.5M0.53%Q1 2026 02

Orbis Allan Gray Ltd

CIK 0001663865

$797M2.5M3.36%Q1 2026 03

BlackRock, Inc.

CIK 0002012383

$749M2.3M0.01%Q1 2026 04

FMR LLC

CIK 0000315066

$696M2.2M0.04%Q1 2026 05

PERCEPTIVE ADVISORS LLC

CIK 0001224962

$656M2.0M12.82%Q1 2026 06

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$394M1.2M0.01%Q1 2026 07

BAKER BROS. ADVISORS LP

CIK 0001263508

$332M1.1M1.94%Q4 2025 08

DRIEHAUS CAPITAL MANAGEMENT LLC

CIK 0000938206

$306M949K2.25%Q1 2026 09

Cormorant Asset Management, LP

CIK 0001583977

$285M886K14.33%Q1 2026 10

STATE STREET CORP

CIK 0000093751

$285M884K0.01%Q1 2026 11

MORGAN STANLEY

CIK 0000895421

$269M833K0.02%Q1 2026 12

DEERFIELD MANAGEMENT COMPANY, L.P.

CIK 0001009258

$266M903K3.40%Q4 2025 13

ADAGE CAPITAL PARTNERS GP, L.L.C.

CIK 0001165408

$263M816K0.41%Q1 2026 14

Vanguard Portfolio Management

CIK 0002100121· Index

$244M757K0.01%Q1 2026 15

GOLDMAN SACHS GROUP INC

CIK 0000886982

$229M711K0.03%Q1 2026 16

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$210M651K0.01%Q1 2026 17

PRICE T ROWE ASSOCIATES INC /MD/

CIK 0000080255

$203M631K0.02%Q1 2026 18

BANK OF AMERICA CORP /DE/

CIK 0000070858

$172M535K0.01%Q1 2026 19

RA CAPITAL MANAGEMENT, L.P.

CIK 0001346824

$120M374K1.28%Q1 2026 20

Hood River Capital Management LLC

CIK 0001578177

$116M359K1.16%Q1 2026

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