Sirius XM Holdings Inc. (SIRI) Shareholders & Insider Trades
Sirius XM shareholders at a glance
The largest holder of Sirius XM stock is Berkshire Hathaway Inc., with 124.8 million shares (37.03% of the company), worth about $3.52 billion as of September 25, 2026. The 10 largest holders together own 62.3%.
In Q2 2026, 650 institutional holdings reports listed 294.0 million shares worth $8.72 billion, up 13.5% in shares from Q1 2026.
Insiders reported 83 transactions in the last two years: 3 sales worth $111,827 and 1 purchase. The newest one on file is from March 5, 2026 (Maffei Gregory B, Director).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through March 5, 2026.
Sirius XM Holdings Inc.
Shareholders Summary
2026Q2
Ownership by Type
Geographic Distribution
Largest Sirius XM shareholders
| Holder | Shares | % of company | Value |
|---|---|---|---|
| Berkshire Hathaway Inc. | 124.8 million | 37.03% | $3.5B |
| John Malone5.465 % | 18.4 million | 5.46% | $519.0M |
| BlackRock Advisors LLC | 16.7 million | 4.97% | $472.0M |
| DFA Australia Ltd. | 10.1 million | 2.99% | $284.0M |
| Vanguard Portfolio Management LLC | 9.1 million | 2.69% | $256.0M |
| Vanguard Capital Management LLC | 8.4 million | 2.49% | $236.0M |
| Kontiki Capital Management (HK) Ltd. | 6.1 million | 1.80% | $171.0M |
| State Street Corporation | 6.0 million | 1.78% | $169.0M |
| Gregory Maffei1.598 % | 5.4 million | 1.60% | $152.0M |
| Boston Partners Global Investors, Inc. | 5.1 million | 1.51% | $143.0M |
As of September 25, 2026.
Sirius XM institutional holdings by quarter
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 650 | 294.0 million | $8.7B |
| Q1 2026 | 593 | 259.0 million | $6.0B |
| Q4 2025 | 564 | 251.0 million | $5.0B |
| Q3 2025 | 594 | 244.0 million | $5.7B |
| Q2 2025 | 593 | 250.0 million | $5.8B |
| Q1 2025 | 604 | 249.0 million | $5.6B |
| Q4 2024 | 616 | 254.0 million | $5.8B |
| Q3 2024 | 555 | 256.0 million | $6.1B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
Sirius XM insider trades
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Maffei Gregory B | Mar 5, 2026 | Director | Stock Gift at price 0.00 per share. | – |
| Greenstein Scott Andrew | Feb 27, 2026 | President | Stock Award(Grant) at price 0.00 per share. | – |
| Zaslav David M | Feb 27, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Hartenstein Eddy W. | Feb 27, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Procope Jonelle | Feb 27, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Stephenson David Eliot | Feb 27, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Coughlin Zachary | Feb 27, 2026 | Chief Financial Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Thorsen Wayne | Feb 27, 2026 | Chief Operating Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Mothner Eve | Feb 27, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Rapino Michael James | Feb 27, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Witz Jennifer C | Feb 27, 2026 | Chief Executive Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Maffei Gregory B | Feb 27, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
Newest 12 of 83 insider transactions in the last two years.
Questions and answers
Who owns the most Sirius XM stock?
Berkshire Hathaway Inc., with 37.03% of the company (as of September 25, 2026). Next: John Malone5.465 % (5.46%) and BlackRock Advisors LLC (4.97%).
How many institutions own Sirius XM stock?
650 institutional holdings reports listed Sirius XM shares in Q2 2026, 294.0 million shares in all worth $8.72 billion.
Are Sirius XM insiders buying or selling the stock?
In the last two years insiders reported 3 sales and 1 purchase (83 transactions in all); the newest on file is from March 5, 2026.
