AI Holders Summary · Q1 2026

231 institutions reported ERAS in Q1 2026. Frazier Life Sciences Management, L.P. leads at 12.6% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(2 on this page)

#HolderValueShares% port.Quarter

Frazier Life Sciences Management, L.P.

CIK 0001892134

$399M24.7M10.27%Q1 2026 02

T. Rowe Price Investment Management, Inc.

CIK 0001897612

$344M21.3M0.24%Q1 2026 03

BlackRock, Inc.

CIK 0002012383

$326M20.2M0.01%Q1 2026 04

RTW INVESTMENTS, LP

CIK 0001493215

$261M16.2M2.60%Q1 2026 05

Vivo Capital, LLC

CIK 0001674712

$197M12.2M16.34%Q1 2026 06

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$182M11.2M0.00%Q1 2026 07

Siren, L.L.C.

CIK 0002005245

$182M11.2M5.04%Q1 2026 08

Logos Global Management LP

CIK 0001792126

$180M11.2M9.01%Q1 2026 09

Paradigm Biocapital Advisors LP

CIK 0001855655

$168M10.4M3.44%Q1 2026 10

STATE STREET CORP

CIK 0000093751

$150M9.3M0.01%Q1 2026 11

ARCH Venture Management, LLC

CIK 0001274403

$115M7.1M16.95%Q1 2026 12

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$97M6.0M0.01%Q1 2026 13

Cormorant Asset Management, LP

CIK 0001583977

$94M5.8M4.71%Q1 2026 14

Affinity Asset Advisors, LLC

CIK 0001773195

$87M5.3M4.47%Q1 2026 15

BALYASNY ASSET MANAGEMENT L.P.

CIK 0001218710

$83M5.1M0.11%Q1 2026 16

GOLDMAN SACHS GROUP INC

CIK 0000886982

$79M4.9M0.01%Q1 2026 17

VR Adviser, LLC

CIK 0001615982

$66M17.9M3.28%Q4 2025 18

JANUS HENDERSON GROUP PLC

CIK 0001274173

$60M3.7M0.03%Q1 2026 19

SUVRETTA CAPITAL MANAGEMENT, LLC

CIK 0001569064

$56M3.4M1.42%Q1 2026 20

Commodore Capital LP

CIK 0001831942

$51M3.2M2.97%Q1 2026

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