AI Holders Summary · Q1 2026

48 institutions reported RPID in Q1 2026. Bain Capital Life Sciences Investors, LLC leads at 54.2% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(6 on this page)

#HolderValueShares% port.Quarter

Bain Capital Life Sciences Investors, LLC

CIK 0001703031

$19M8.4M1.73%Q1 2026 02

ABG-WTT Global Life Science Capital Partners GP Ltd

CIK 0001832108

$4M1.8M34.13%Q1 2026 03

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$2M982K0.00%Q1 2026 04

ESSEX INVESTMENT MANAGEMENT CO LLC

CIK 0000201772

$2M884K0.32%Q1 2026 05

ADVENT INTERNATIONAL, L.P.

CIK 0001034196

$1M552K0.03%Q1 2026 06

Evernest Financial Advisors, LLC

CIK 0002009530

$1M433K0.21%Q1 2026 07

SEI INVESTMENTS CO

CIK 0000350894

$647K285K0.00%Q1 2026 08

MILLENNIUM MANAGEMENT LLC

CIK 0001273087

$643K283K0.00%Q1 2026 09

Legato Capital Management LLC

CIK 0001442641

$624K275K0.06%Q1 2026 10

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$561K247K0.00%Q1 2026 11

SUSQUEHANNA INTERNATIONAL GROUP, LLP

CIK 0001446194· Market maker

$481K212K0.00%Q1 2026 12

CITADEL ADVISORS LLC

CIK 0001423053

$367K127K0.00%Q4 2025 13

BlackRock, Inc.

CIK 0002012383

$357K157K0.00%Q1 2026 14

683 Capital Management, LLC

CIK 0001404574

$350K121K0.02%Q4 2025 15

JANE STREET GROUP, LLC

CIK 0001595888· Market maker

$302K133K0.00%Q1 2026 16

RENAISSANCE TECHNOLOGIES LLC

CIK 0001037389

$287K127K0.00%Q1 2026 17

VANGUARD FIDUCIARY TRUST CO

CIK 0000933478· Index

$249K110K0.00%Q1 2026 18

STATE STREET CORP

CIK 0000093751

$213K94K0.00%Q1 2026 19

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$199K88K0.00%Q1 2026 20

MARSHALL WACE, LLP

CIK 0001318757

$182K63K0.00%Q4 2025

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