AI Holders Summary · Q2 2026

1,577 institutions reported BSX in Q2 2026. BlackRock, Inc. leads at 17.4% 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

$5.5B129.7M0.08%Q2 2026 02

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$4.1B97.1M0.09%Q2 2026 03

STATE STREET CORP

CIK 0000093751

$3.0B70.1M0.09%Q2 2026 04

PRIMECAP MANAGEMENT CO/CA/

CIK 0000763212

$2.2B50.5M1.27%Q2 2026 05

FMR LLC

CIK 0000315066

$2.0B45.7M0.08%Q2 2026 06

MASSACHUSETTS FINANCIAL SERVICES CO /MA/

CIK 0000912938

$1.5B24.9M0.48%Q2 2026 07

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$1.4B33.4M0.08%Q2 2026 08

Vanguard Portfolio Management

CIK 0002100121· Index

$1.3B29.8M0.06%Q2 2026 09

Bollard Group LLC

CIK 0001556218

$1.2B18.5M34.26%Q1 2026 10

D. E. Shaw & Co., Inc.

CIK 0001009207

$1.1B11.2M0.59%Q4 2025 11

JPMORGAN CHASE & CO

CIK 0000019617

$1.0B23.9M0.06%Q2 2026 12

JANUS HENDERSON GROUP PLC

CIK 0001274173

$1.0B16.5M0.49%Q1 2026 13

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

CIK 0001164508

$994M23.3M0.44%Q2 2026 14

NORGES BANK

CIK 0001374170· Sovereign

$904M21.2M0.09%Q2 2026 15

TWO SIGMA INVESTMENTS, LP

CIK 0001179392

$829M19.4M0.60%Q2 2026 16

GOLDMAN SACHS GROUP INC

CIK 0000886982

$820M19.2M0.07%Q2 2026 17

MORGAN STANLEY

CIK 0000895421

$809M18.9M0.04%Q2 2026 18

Jupiter Topco LLC

CIK 0002146052

$803M18.8M0.33%Q2 2026 19

Capital World Investors

CIK 0001422849

$718M16.8M0.08%Q2 2026 20

UBS Group AG

CIK 0001610520

$712M16.7M0.09%Q2 2026

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