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SIRI Institutional Ownership

Top institutional (13F) holders of SIRI and activist (13D/G) positions, sourced from SEC EDGAR.

Institutional owners
38
Institutional value
$6.58B
Top holder
BERKSHIRE HATHAWAY INC

Top holders

HolderFiledValue
BERKSHIRE HATHAWAY INCACTIVISTinvestment advisorAug 14, 2026$3.69B
BlackRock, Inc.holding companyAug 7, 2026$519.97M
Dimensional Fund Advisors LPhedge fundAug 11, 2026$310.53M
Vanguard Portfolio Managementhedge fundAug 13, 2026$268.30M
Vanguard Capital Managementhedge fundAug 13, 2026$247.75M
SUSQUEHANNA INTERNATIONAL GROUP, LLPinvestment advisorAug 14, 2026$204.08M
STATE STREET CORPinvestment advisorAug 7, 2026$177.02M
CITADEL ADVISORS LLCinvestment advisorAug 14, 2026$156.90M
GOLDMAN SACHS GROUP INCinvestment advisorAug 14, 2026$142.00M
GEODE CAPITAL MANAGEMENT, LLCinvestment advisorAug 12, 2026$115.28M
AQR CAPITAL MANAGEMENT LLCinvestment advisorAug 14, 2026$98.37M
Bank of New York Mellon Corpholding companyAug 6, 2026$88.98M
Canada Pension Plan Investment BoardACTIVISTotherAug 14, 2026$69.86M
Norges BankotherAug 12, 2026$61.80M
CHARLES SCHWAB INVESTMENT MANAGEMENT INCinvestment advisorAug 14, 2026$52.01M
JANE STREET GROUP, LLCholding companyAug 14, 2026$50.56M
MORGAN STANLEYinvestment advisorAug 13, 2026$48.49M
NORTHERN TRUST CORPinvestment advisorAug 13, 2026$46.81M
UBS Group AGinvestment advisorAug 13, 2026$27.10M
TWO SIGMA INVESTMENTS, LPinvestment advisorAug 14, 2026$24.90M
JPMORGAN CHASE & COinvestment advisorAug 12, 2026$21.85M
PRICE T ROWE ASSOCIATES INC /MD/investment advisorAug 14, 2026$21.57M
Ameriprise Financial, Inc.holding companyAug 14, 2026$21.55M
Invesco Ltd.investment advisorAug 14, 2026$21.38M
ROYAL BANK OF CANADAinvestment advisorAug 14, 2026$19.27M

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Source: SEC EDGAR Schedule 13D / 13G and 13F filings.