AI Holders Summary · Q2 2026

110 institutions reported AKTS in Q2 2026. MPM BioImpact LLC leads at 16.2% 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

MPM BioImpact LLC

CIK 0001687078

$156M4.8M9.50%Q2 2026 02

EcoR1 Capital, LLC

CIK 0001587114

$155M4.8M7.56%Q2 2026 03

Blue Owl Capital Holdings LP

CIK 0001858703

$99M3.1M14.89%Q2 2026 04

BlackRock, Inc.

CIK 0002012383

$73M2.3M0.00%Q2 2026 05

WELLINGTON MANAGEMENT GROUP LLP

CIK 0000902219

$63M2.0M0.01%Q2 2026 06

RTW INVESTMENTS, LP

CIK 0001493215

$51M1.6M0.44%Q2 2026 07

RA CAPITAL MANAGEMENT, L.P.

CIK 0001346824

$42M1.3M0.37%Q2 2026 08

Jupiter Topco LLC

CIK 0002146052

$42M1.3M0.02%Q2 2026 09

T. Rowe Price Investment Management, Inc.

CIK 0001897612

$38M2.1M0.03%Q1 2026 10

Octagon Capital Advisors LP

CIK 0001839435

$31M961K2.78%Q2 2026 11

Merck & Co., Inc.

CIK 0000310158

$31M953K5.83%Q2 2026 12

PRICE T ROWE ASSOCIATES INC /MD/

CIK 0000080255

$28M1.6M0.00%Q1 2026 13

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$26M817K0.00%Q2 2026 14

JANUS HENDERSON GROUP PLC

CIK 0001274173

$26M1.5M0.01%Q1 2026 15

TCG Crossover Management, LLC

CIK 0001839948

$22M697K0.54%Q2 2026 16

Avidity Partners Management LP

CIK 0001791827

$17M937K1.83%Q1 2026 17

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$17M521K0.00%Q2 2026 18

EVENTIDE ASSET MANAGEMENT, LLC

CIK 0001442891

$16M507K0.22%Q2 2026 19

STATE STREET CORP

CIK 0000093751

$16M484K0.00%Q2 2026 20

a16z Capital Management, L.L.C.

CIK 0001540358

$13M415K0.09%Q2 2026

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