Sirius XM Holdings Inc. (SIRI) ownership: Top institutional holder: Berkshire Hathaway Inc ($2.88B). Insider activity: Net Seller (2 buys, 18 sells). 10 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| Berkshire Hathaway Inc | 124807117.00 | $2.88B | 2026-03-31 |
| VANGUARD GROUP INC | 18320515.00 | $366.32M | 2025-12-31 |
| BlackRock, Inc. | 9625184.00 | $222.15M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 8704748.00 | $200.91M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 8303630.00 | $191.65M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 6301181.00 | $145.43M | 2026-03-31 |
| Kontiki Capital Management (HK) Ltd. | 5696724.00 | $131.48M | 2026-03-31 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 4620400.00 | $106.64M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-27 | |
| Sell | null | 2026-05-27 | |
| Buy | null | 2026-05-27 | |
| Sell | null | 2026-05-27 | |
| Sell | null | 2026-05-27 | |
| Sell | null | 2026-05-27 | |
| Sell | null | 2026-05-27 | |
| Sell | null | 2026-05-27 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.