Sirius XM Holdings Inc.
Ownership
Ownership Structure
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%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Berkshire Hathaway Inc | 37.08 | 124,807,117 | +0.0 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 3.12 | 10,512,352 | +66.8 | 06/30/2026 |
| BlackRock Inc | 2.86 | 9,625,184 | -4.2 | 03/31/2026 |
| Check Capital Management Inc | 2.61 | 8,783,397 | +198.5 | 06/30/2026 |
| 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 |
| Kontiki Capital Management (HK) Ltd. | 1.81 | 6,082,824 | +6.8 | 06/30/2026 |
| Boston Partners Global Investors, Inc | 1.51 | 5,080,806 | +0.0 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 1.96 | 6,601,886 | +0.0 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 1.75 | 5,900,584 | +0.3 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Maffei Gregory B | Director | 5,385,099 | 149,167,242 $ | Aug 26, 2026 | direct |
| Witz Jennifer C | CEO | 382,012 | 10,581,732 $ | Aug 26, 2026 | direct |
| Coughlin Zachary | EVP and CFO | 299,422 | 8,293,989 $ | Aug 26, 2026 | direct |
| Mothner Eve | EVP, Chief Legal Officer & Sec | 174,503 | 4,833,733 $ | Aug 26, 2026 | direct |
| Hartenstein Eddy W | Director | 52,145 | 1,444,417 $ | Aug 26, 2026 | both |
| Malone Evan Daniel | Director | 44,306 | 1,227,276 $ | Aug 26, 2026 | direct |
| Rapino Michael | Director | 41,136 | 1,139,467 $ | Aug 26, 2026 | direct |
| Zaslav David | Director | 35,465 | 982,381 $ | Aug 26, 2026 | direct |
| Salen Kristina | Director | 22,992 | 636,878 $ | Aug 26, 2026 | direct |
| Greenstein Scott Andrew | Pres. & Chief Content Officer | 20,340 | 563,418 $ | Aug 26, 2026 | direct |
| Procope Jonelle | Director | 18,414 | 510,068 $ | Aug 26, 2026 | direct |
| Sud Anjali | Director | 16,204 | 448,851 $ | Aug 26, 2026 | direct |
| Stephenson Dave | Director | 12,737 | 352,815 $ | Aug 26, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 9, 2026 | Hartenstein Eddy W | Director | Other | 8,193 | 0.00 | – |
| Aug 26, 2026 | Zaslav David | Director | Other | 60 | 0.00 | – |
| Aug 26, 2026 | Witz Jennifer C | CEO | Other | 1,419 | 0.00 | – |
| Aug 26, 2026 | Sud Anjali | Director | Other | 60 | 0.00 | – |
| Aug 26, 2026 | Stephenson Dave | Director | Other | 60 | 0.00 | – |
| Aug 26, 2026 | Salen Kristina | Director | Other | 60 | 0.00 | – |
| Aug 26, 2026 | Rapino Michael | Director | Other | 60 | 0.00 | – |
| Aug 26, 2026 | Procope Jonelle | Director | Other | 60 | 0.00 | – |
| Aug 26, 2026 | Mothner Eve | EVP, Chief Legal Officer & Sec | Other | 1,528 | 0.00 | – |
| Aug 26, 2026 | Malone Evan Daniel | Director | Other | 60 | 0.00 | – |
| Aug 26, 2026 | Maffei Gregory B | Director | Other | 60 | 0.00 | – |
| Aug 26, 2026 | Hartenstein Eddy W | Director | Other | 60 | 0.00 | – |
| Aug 26, 2026 | Greenstein Scott Andrew | Pres. & Chief Content Officer | Other | 177 | 0.00 | – |
| Aug 26, 2026 | Coughlin Zachary | EVP and CFO | Other | 2,621 | 0.00 | – |
| Aug 6, 2026 | Procope Jonelle | Director | Sell | 16,672 | 29.97 | 499,702 |
| Jul 13, 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: September 17, 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.