AI Holders Summary · Q1 2026

1,602 institutions reported MRSH in Q1 2026. BlackRock, Inc. leads at 16.3% 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

$7.3B42.1M0.13%Q1 2026 02

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$5.5B31.5M0.14%Q1 2026 03

STATE STREET CORP

CIK 0000093751

$3.8B22.1M0.13%Q1 2026 04

Capital World Investors

CIK 0001422849

$3.1B18.0M0.43%Q1 2026 05

WELLINGTON MANAGEMENT GROUP LLP

CIK 0000902219

$3.0B17.4M0.56%Q1 2026 06

Capital International Investors

CIK 0001562230

$2.7B15.7M0.64%Q1 2026 07

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$2.3B13.4M0.14%Q1 2026 08

Vanguard Portfolio Management

CIK 0002100121· Index

$2.2B12.4M0.11%Q1 2026 09

Capital Research Global Investors

CIK 0001422848

$2.0B11.3M0.30%Q1 2026 10

PRICE T ROWE ASSOCIATES INC /MD/

CIK 0000080255

$1.9B11.0M0.22%Q1 2026 11

FMR LLC

CIK 0000315066

$1.8B10.2M0.09%Q1 2026 12

MASSACHUSETTS FINANCIAL SERVICES CO /MA/

CIK 0000912938

$1.4B8.2M0.48%Q1 2026 13

MORGAN STANLEY

CIK 0000895421

$1.1B6.5M0.07%Q1 2026 14

Clearbridge Investments, LLC

CIK 0001348883

$1.1B6.4M0.97%Q1 2026 15

JPMORGAN CHASE & CO

CIK 0000019617

$1.1B6.1M0.07%Q1 2026 16

AMERIPRISE FINANCIAL INC

CIK 0000820027

$952M5.5M0.22%Q1 2026 17

UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC

CIK 0000861177

$899M5.2M0.19%Q1 2026 18

HARRIS ASSOCIATES L P

CIK 0000813917

$897M5.2M1.19%Q1 2026 19

NORTHERN TRUST CORP

CIK 0000073124· Index

$861M5.0M0.11%Q1 2026 20

BANK OF AMERICA CORP /DE/

CIK 0000070858

$857M4.9M0.06%Q1 2026

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