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Of the 12 tracked institutions holding SIRI, 6 have a 3-year clone track record — 3 of them beat the S&P. Average holder's clone alpha: -0.0pt. It's a gauge of who owns the name, not just how many.
Among the 12 tracked institutional investors we monitor, SIRI (SIRIUSXM HOLDINGS INC) is held with a combined value of $5.04B across 176,853,710 shares. The largest holder is BERKSHIRE HATHAWAY INC with a position worth $3.69B (1.23% of their portfolio). 10 funds increased their holdings. 1 fund reduced its position.
Total Institutional Value
$5.04B
Total Shares Held
176,853,710
Institutional Holders
12
% of Shares Outstanding
52.5%
of 337.07M shares · SEC 2026-07-28
Days to Cover
8.2+1.0%
35.10M shares short · FINRA 2026-08-14
Tracked 13F institutions hold 52.5% of SIRI's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-07-28), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BERKSHIRE HATHAWAY INC | $3.69B | 1.23% | - |
| 2 | BlackRock, Inc. | $519.97M | 0.01% | +82.9% |
| 3 | VANGUARD GROUP INC | $366.32M | 0.01% | -1.9% |
| 4 | STATE STREET CORP | $177.02M | 0.01% | +68.9% |
| 5 | AQR CAPITAL MANAGEMENT LLC | $98.37M | 0.03% | +13.6% |
| 6 | CITADEL ADVISORS LLC | $97.79M | 0.06% | +1.5% |
| 7 | Gotham Asset Management, LLC | $40.86M | 0.10% | +11.7% |
| 8 | PRICE T ROWE ASSOCIATES INC /MD/ | $21.57M | 0.00% | +352.8% |
| 9 | TWO SIGMA ADVISERS, LP | $19.47M | 0.04% | +35.8% |
| 10 | Bridgewater Associates, LP | $4.38M | 0.02% | +62.3% |
| Member | Type | Date |
|---|---|---|
| John W Hickenlooper | Sell | Feb 5, 2026 |
| August Lee II. Pfluger | Sell | Jan 13, 2026 |
| August Lee II. Pfluger | Sell | Jul 1, 2025 |
| John W Hickenlooper | Sell |
As of the latest SEC 13F filings, BERKSHIRE HATHAWAY INC is the largest institutional holder of SIRI with a position worth $3.69B, representing 1.23% of their portfolio. In total, 12 institutional investors hold SIRI with a combined value of $5.04B.
Institutional investors hold $5.04B worth of SIRI stock across 12 positions. The largest institutional holder is BERKSHIRE HATHAWAY INC with $3.69B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For SIRI, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their SIRI positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| Apr 25, 2025 |
| Thomas H. Jr. Kean | exchange | Sep 10, 2024 |
| August Lee II. Pfluger | exchange | Sep 10, 2024 |
Last Close
$28.54
2026-09-09
YTD
+39.2%
68% of 52-week range
