AI Holders Summary · Q1 2026

160 institutions reported MBX in Q1 2026. Frazier Life Sciences Management, L.P. leads at 15.6% 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

Frazier Life Sciences Management, L.P.

CIK 0001892134

$199M6.7M5.11%Q1 2026 02

ORBIMED ADVISORS LLC

CIK 0001055951

$109M3.6M2.16%Q1 2026 03

NEA Management Company, LLC

CIK 0001512848

$108M3.6M6.13%Q1 2026 04

WELLINGTON MANAGEMENT GROUP LLP

CIK 0000902219

$95M3.2M0.02%Q1 2026 05

BlackRock, Inc.

CIK 0002012383

$88M2.9M0.00%Q1 2026 06

FMR LLC

CIK 0000315066

$88M2.9M0.00%Q1 2026 07

Deep Track Capital, LP

CIK 0001856083

$82M2.8M1.34%Q1 2026 08

NVP Associates, LLC

CIK 0001545692

$67M2.1M26.40%Q4 2025 09

Aaron Wealth Advisors LLC

CIK 0001812198

$64M1.2M3.27%Q2 2026 10

Polar Capital Holdings Plc

CIK 0001837309

$48M1.6M0.17%Q1 2026 11

BRAIDWELL LP

CIK 0001920938

$45M1.5M1.49%Q1 2026 12

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$44M1.5M0.00%Q1 2026 13

Cormorant Asset Management, LP

CIK 0001583977

$33M1.1M1.68%Q1 2026 14

PRICE T ROWE ASSOCIATES INC /MD/

CIK 0000080255

$31M1.0M0.00%Q1 2026 15

DRIEHAUS CAPITAL MANAGEMENT LLC

CIK 0000938206

$30M1.0M0.22%Q1 2026 16

STEMPOINT CAPITAL LP

CIK 0001952142

$30M999K2.88%Q1 2026 17

Kynam Capital Management, LP

CIK 0001907884

$28M935K1.72%Q1 2026 18

Woodline Partners LP

CIK 0001784547

$27M900K0.10%Q1 2026 19

EVENTIDE ASSET MANAGEMENT, LLC

CIK 0001442891

$27M890K0.44%Q1 2026 20

CITADEL ADVISORS LLC

CIK 0001423053

$26M835K0.00%Q4 2025

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