AI Holders Summary · Q1 2026

1,672 institutions reported BSX in Q1 2026. BlackRock, Inc. leads at 18.6% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(3 on this page)

#HolderValueShares% port.Quarter

BlackRock, Inc.

CIK 0002012383

$8.3B131.8M0.14%Q1 2026 02

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$6.0B96.4M0.15%Q1 2026 03

FMR LLC

CIK 0000315066

$4.7B74.2M0.25%Q1 2026 04

STATE STREET CORP

CIK 0000093751

$4.3B68.0M0.15%Q1 2026 05

JPMORGAN CHASE & CO

CIK 0000019617

$2.1B33.4M0.13%Q1 2026 06

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$2.1B33.3M0.13%Q1 2026 07

PRIMECAP MANAGEMENT CO/CA/

CIK 0000763212

$2.0B32.5M1.61%Q1 2026 08

Vanguard Portfolio Management

CIK 0002100121· Index

$1.9B29.8M0.10%Q1 2026 09

BANK OF AMERICA CORP /DE/

CIK 0000070858

$1.4B22.8M0.10%Q1 2026 10

MORGAN STANLEY

CIK 0000895421

$1.4B22.3M0.08%Q1 2026 11

GOLDMAN SACHS GROUP INC

CIK 0000886982

$1.2B19.4M0.14%Q1 2026 12

WELLINGTON MANAGEMENT GROUP LLP

CIK 0000902219

$1.2B18.8M0.22%Q1 2026 13

Bollard Group LLC

CIK 0001556218

$1.2B18.5M34.26%Q1 2026 14

D. E. Shaw & Co., Inc.

CIK 0001009207

$1.1B11.2M0.59%Q4 2025 15

JANUS HENDERSON GROUP PLC

CIK 0001274173

$1.0B16.5M0.49%Q1 2026 16

UBS Group AG

CIK 0001610520

$992M15.8M0.15%Q1 2026 17

Capital World Investors

CIK 0001422849

$961M15.3M0.13%Q1 2026 18

FRANKLIN RESOURCES INC

CIK 0000038777

$923M14.7M0.23%Q1 2026 19

DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main

CIK 0001694217

$888M14.2M0.79%Q1 2026 20

Amundi

CIK 0001330387

$886M14.1M0.24%Q1 2026

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