AI Holders Summary · Q1 2026

768 institutions reported MEDP in Q1 2026. BlackRock, Inc. leads at 18.8% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(4 on this page)

#HolderValueShares% port.Quarter

BlackRock, Inc.

CIK 0002012383

$1.2B2.5M0.02%Q1 2026 02

AQR CAPITAL MANAGEMENT LLC

CIK 0001167557

$634M1.4M0.29%Q1 2026 03

Vanguard Portfolio Management

CIK 0002100121· Index

$539M1.1M0.03%Q1 2026 04

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$486M1.0M0.01%Q1 2026 05

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$358M745K0.02%Q1 2026 06

WASATCH ADVISORS LP

CIK 0000814133

$337M637K2.21%Q2 2026 07

STATE STREET CORP

CIK 0000093751

$328M682K0.01%Q1 2026 08

D. E. Shaw & Co., Inc.

CIK 0001009207

$297M528K0.16%Q4 2025 09

Invesco Ltd.

CIK 0000914208

$277M578K0.03%Q1 2026 10

RENAISSANCE TECHNOLOGIES LLC

CIK 0001037389

$242M505K0.38%Q1 2026 11

BAILLIE GIFFORD & CO

CIK 0001088875

$242M503K0.25%Q1 2026 12

Mawer Investment Management Ltd.

CIK 0001538449

$214M446K1.39%Q1 2026 13

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

CIK 0001164508

$190M396K0.10%Q1 2026 14

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$167M348K0.03%Q1 2026 15

UBS Group AG

CIK 0001610520

$163M340K0.02%Q1 2026 16

PRICE T ROWE ASSOCIATES INC /MD/

CIK 0000080255

$139M290K0.02%Q1 2026 17

MORGAN STANLEY

CIK 0000895421

$138M288K0.01%Q1 2026 18

BESSEMER GROUP INC

CIK 0001054074

$137M285K0.22%Q1 2026 19

Madison Asset Management, LLC

CIK 0001299351

$126M262K1.56%Q1 2026 20

Giverny Capital Inc.

CIK 0001641864

$123M256K4.50%Q1 2026

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