AI Holders Summary · Q3 2025

48 institutions reported HOWL in Q3 2025. MPM ASSET MANAGEMENT LLC leads at 43.6% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(5 on this page)

#HolderValueShares% port.Quarter

MPM ASSET MANAGEMENT LLC

CIK 0001263048

$8M4.3M19.96%Q3 2025 02

RA CAPITAL MANAGEMENT, L.P.

CIK 0001346824

$6M6.7M0.06%Q1 2026 03

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$1M1.2M0.00%Q1 2026 04

MPM BioImpact LLC

CIK 0001687078

$1M1.2M0.08%Q1 2026 05

Lynx1 Capital Management LP

CIK 0001910456

$548K658K0.09%Q1 2026 06

SPHERA FUNDS MANAGEMENT LTD.

CIK 0001496201

$522K627K0.08%Q1 2026 07

DC Funds, LP

CIK 0001869028

$490K589K33.01%Q1 2026 08

RENAISSANCE TECHNOLOGIES LLC

CIK 0001037389

$430K516K0.00%Q1 2026 09

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$324K389K0.00%Q1 2026 10

BANK OF AMERICA CORP /DE/

CIK 0000070858

$220K265K0.00%Q1 2026 11

Alyeska Investment Group, L.P.

CIK 0001453072

$149K236K0.00%Q4 2025 12

VANGUARD FIDUCIARY TRUST CO

CIK 0000933478· Index

$131K158K0.00%Q1 2026 13

MILLENNIUM MANAGEMENT LLC

CIK 0001273087

$110K132K0.00%Q1 2026 14

STATE STREET CORP

CIK 0000093751

$99K119K0.00%Q1 2026 15

BlackRock, Inc.

CIK 0002012383

$85K102K0.00%Q1 2026 16

NORTHERN TRUST CORP

CIK 0000073124· Index

$72K87K0.00%Q1 2026 17

JANE STREET GROUP, LLC

CIK 0001595888· Market maker

$69K83K0.00%Q1 2026 18

BRIDGEWAY CAPITAL MANAGEMENT, LLC

CIK 0001107261

$64K77K0.00%Q1 2026 19

UBS Group AG

CIK 0001610520

$56K67K0.00%Q1 2026 20

XTX Topco Ltd

CIK 0001828301

$42K51K0.00%Q1 2026

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