Sirius XM Holdings
SIRI · NASDAQ
Who owns SIRI
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 63.0% of SIRI’s shares.
- Berkshire Hathaway Inc.37.1%
- Malone (John C)5.5%
- BlackRock Institutional Trust Company, N.A.4.7%
- Dimensional Fund Advisors, L.P.3.1%
- Next 6 largest institutions12.6%
- All other shareholders37.0%
| Holder | Shares | % of shares |
|---|---|---|
| Berkshire Hathaway Inc. | 124.81M | 37.08% |
| Malone (John C) | 18.42M | 5.47% |
| BlackRock Institutional Trust Company, N.A. | 15.73M | 4.67% |
| Dimensional Fund Advisors, L.P. | 10.51M | 3.12% |
| Vanguard Portfolio Management, LLC | 9.08M | 2.70% |
| Vanguard Capital Management, LLC | 8.39M | 2.49% |
| Maffei (Gregory B) | 7.83M | 2.33% |
| Kontiki Capital Management (HK) Limited | 6.08M | 1.81% |
| State Street Investment Management (US) | 5.99M | 1.78% |
| Boston Partners | 5.08M | 1.51% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Mid-Cap ETF | 6.60M | 1.96% |
| Vanguard Total Stock Market Index Fund | 5.90M | 1.75% |
| Vanguard Small-Cap Index Fund | 4.26M | 1.26% |
| John Hancock Disciplined Value Mid Cap Fund | 2.90M | 0.86% |
| Vanguard Small-Cap Value Index Fund | 2.70M | 0.80% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $739.91K (2 trades) of SIRI on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Stephenson Dave | Award | 6.78K | — |
| Procope Jonelle | Award | 6.78K | — |
| Sud Anjali | Award | 6.78K | — |
| Salen Kristina | Sale | 4.10K | $121.15K |
| Salen Kristina | Award | 6.78K | — |
| MALONE EVAN DANIEL | Award | 6.78K | — |
| Rapino Michael | Award | 6.78K | — |
| Zaslav David | Award | 6.78K | — |
| HARTENSTEIN EDDY W | Award | 6.78K | — |
| MAFFEI GREGORY B | Award | 6.78K | — |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| John W HickenlooperSenator | Sale (Partial) | $50K–$100K | Feb 5, 2026 |
| August PflugerHouse | Sale | $1K–$15K | Jan 13, 2026 |
Short interest
Settled Sep 30, 2026
- Shares short
- 37.49M
- Days to cover
- 7.49
- % of shares outstanding
- 11.14%
- Average daily volume
- 5.00M
- Change since last report
- +1.4%
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