Sirius XM Holdings Inc. (SIRI)
Who owns Sirius XM Holdings Inc. (SIRI)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 91.4% of the shares are freely tradable; institutional investors hold 44.4%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Berkshire Hathaway Inc | 37.08 | 124,807,117 | +0.0 | 03/31/2026 |
| BlackRock Inc | 2.86 | 9,625,184 | -4.2 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 2.59 | 8,704,748 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 2.47 | 8,303,630 | +0.0 | 03/31/2026 |
| Dimensional Fund Advisors, Inc. | 1.87 | 6,301,181 | +262.1 | 03/31/2026 |
| Kontiki Capital Management (HK) Ltd. | 1.69 | 5,696,724 | -4.5 | 03/31/2026 |
| The Goldman Sachs Group Inc | 1.16 | 3,913,128 | +19.5 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 1.92 | 6,474,526 | +0.0 | 07/30/2026 |
| Vanguard Morn Total Stk Mkt Idx Investor | 1.75 | 5,883,360 | +0.2 | 06/30/2026 |
| Vanguard Small Cap Index | 1.26 | 4,248,198 | +0.3 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 13. Jul 2026 | Hartenstein Eddy W | Director | Other | 6,688 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.