Sirius XM Holdings Inc (SIRI) Ownership
SIRI ownership summary
as of October 18, 2026- Institutions
- 49.7% of shares outstanding
- Insiders
- 46.35% of shares outstanding
- Shares outstanding
- 337.1M
- Float
- 308.2M shares available to trade
- Short interest
- 18.60% 37.5M shares short
- Days to cover
- 8.54 short interest up 1.4% vs prior month
- Institutions 49.70%
- Insiders 46.35%
- Other investors 3.94%
SIRI top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Berkshire Hathaway Inc | 37.08% | 124.8M | $3.37B | — | June 30, 2026 |
| 2 | BlackRock Inc | 5.23% | 17.6M | $474.7M | +8.0M (+82.9%) | June 30, 2026 |
| 3 | Dimensional Fund Advisors, Inc. | 3.12% | 10.5M | $283.5M | +4.2M (+66.8%) | June 30, 2026 |
| 4 | Vanguard Portfolio Management, LLC | 2.70% | 9.1M | $245.0M | +377,881 (+4.3%) | June 30, 2026 |
| 5 | Check Capital Management Inc | 2.61% | 8.8M | $236.9M | +5.8M (+198.5%) | June 30, 2026 |
| 6 | Vanguard Capital Management, LLC | 2.49% | 8.4M | $226.2M | +83,154 (+1.0%) | June 30, 2026 |
| 7 | Kontiki Capital Management (HK) Ltd. | 1.81% | 6.1M | $164.1M | +386,100 (+6.8%) | June 30, 2026 |
| 8 | State Street Corp | 1.78% | 6.0M | $161.6M | +2.4M (+68.9%) | June 30, 2026 |
| 9 | Boston Partners Global Investors, Inc | 1.51% | 5.1M | $137.0M | +5.1M (0.0%) | June 30, 2026 |
| 10 | Gates Capital Management Inc | 1.35% | 4.5M | $122.4M | +1.8M (+65.5%) | June 30, 2026 |
| 11 | Geode Capital Management, LLC | 1.16% | 3.9M | $105.2M | +194,777 (+5.3%) | June 30, 2026 |
| 12 | LSV Asset Management | 1.08% | 3.6M | $97.6M | +400,492 (+12.4%) | June 30, 2026 |
| 13 | AQR Capital Management LLC | 1.01% | 3.4M | $91.6M | +407,401 (+13.6%) | June 30, 2026 |
| 14 | Citadel Advisors Llc | 0.98% | 3.3M | $89.3M | +48,908 (+1.5%) | June 30, 2026 |
| 15 | Bank of New York Mellon Corp | 0.89% | 3.0M | $81.2M | +834,479 (+38.3%) | June 30, 2026 |
| 16 | The Goldman Sachs Group Inc | 0.89% | 3.0M | $81.1M | −905,991 (−23.2%) | June 30, 2026 |
| 17 | J. Goldman & Co LP | 0.87% | 2.9M | $78.8M | +2.9M (0.0%) | June 30, 2026 |
| 18 | Canada Pension Plan Investment Board | 0.70% | 2.4M | $63.8M | −1.5M (−38.7%) | June 30, 2026 |
| 19 | NORGES BANK | 0.62% | 2.1M | $56.4M | −764,999 (−26.8%) | June 30, 2026 |
| 20 | Charles Schwab Investment Management Inc | 0.52% | 1.8M | $47.5M | +20,442 (+1.2%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 16 holders added 33.0M shares and 3 cut 3.2M.
SIRI top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Mid-Cap ETF | 1.96% | 6.6M | $178.2M | −2,364 (−0.0%) | September 30, 2026 |
| 2 | JHancock Disciplined Value Mid Cap I | 1.91% | 6.4M | $173.1M | +1.5M (+31.0%) | August 31, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 1.75% | 5.9M | $159.0M | −6,332 (−0.1%) | August 31, 2026 |
| 4 | Vanguard Small Cap Index | 1.24% | 4.2M | $112.6M | −87,702 (−2.1%) | September 30, 2026 |
| 5 | Vanguard MStar Small Cap Value Index | 0.81% | 2.7M | $73.3M | +10,985 (+0.4%) | September 30, 2026 |
| 6 | DFA US Small Cap Value I | 0.80% | 2.7M | $72.6M | +147,120 (+5.8%) | August 31, 2026 |
| 7 | VistaShares Trgt 15 Berkshire Sel IncETF | 0.53% | 1.8M | $48.0M | — | September 30, 2026 |
| 8 | DFA US Targeted Value I | 0.53% | 1.8M | $47.7M | +190,722 (+12.1%) | August 31, 2026 |
| 9 | Pacer US Small Cap Cash Cows 100 ETF | 0.49% | 1.7M | $44.8M | +3,735 (+0.2%) | September 30, 2026 |
| 10 | Dimensional US Targeted Value ETF | 0.45% | 1.5M | $40.7M | +269 (+0.0%) | September 30, 2026 |
| 11 | Dimensional US Small Cap Value ETF | 0.43% | 1.4M | $39.0M | +694 (+0.0%) | September 24, 2026 |
| 12 | State Street® SPDR® S&P MIDCAP 400® ETF | 0.41% | 1.4M | $37.0M | −7,838 (−0.6%) | September 30, 2026 |
| 13 | WisdomTree US MidCap Dividend ETF | 0.32% | 1.1M | $29.5M | — | September 30, 2026 |
| 14 | State Street SPDR Port S&P 400 Md CpETF | 0.29% | 980K | $26.4M | −1,376 (−0.1%) | September 30, 2026 |
| 15 | iShares S&P Mid-Cap 400 Value ETF | 0.28% | 959K | $25.9M | — | September 30, 2026 |
| 16 | Fidelity Extended Market Index | 0.27% | 922K | $24.9M | −13,033 (−1.4%) | August 31, 2026 |
| 17 | Procure Space ETF | 0.27% | 896K | $24.2M | +5,280 (+0.6%) | September 30, 2026 |
| 18 | Invesco S&P Ultra Dividend Revenue ETF | 0.24% | 824K | $22.2M | +674 (+0.1%) | September 30, 2026 |
| 19 | DFA US Small Cap I | 0.24% | 807K | $21.8M | +103,322 (+14.7%) | August 31, 2026 |
| 20 | Fidelity Mid Cap Index | 0.22% | 748K | $20.2M | +77,085 (+11.5%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
SIRI insider transactions
latest 5| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-05 | John W. Hickenlooper | Sell | $22.60 | — | — |
| 2026-01-13 | August Pfluger | Sell | $20.81 | — | — |
| 2025-11-03 | Kristina Salen | Sell | $21.64 | 1,845 | $39,926 |
| 2025-07-01 | August Pfluger | Sell | $23.63 | — | — |
| 2025-05-27 | Kristina Salen | Sell | $22.27 | 1,651 | $36,768 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
SIRI shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns SIRI
Institutional investors own 49.7% of Sirius XM's shares and insiders 46.35%. The largest holder is Berkshire Hathaway Inc with 37.08% of the shares (124.8M), as of June 30, 2026. Among the top 20 institutions, 16 added shares and 3 reduced their stake in the latest filings. Short interest is 18.60% of the float, or 8.54 days of average trading volume. The share count fell 36.9% since 2014.
Related: SIRI analyst forecast, SIRI key metrics, SIRI dividend history. See the SIRI stock overview for the latest quote and news.
SIRI ownership FAQ
Who owns the most Sirius XM stock?
The largest shareholders of Sirius XM are Berkshire Hathaway Inc (37.08%), BlackRock Inc (5.23%), Dimensional Fund Advisors, Inc. (3.12%), Vanguard Portfolio Management, LLC (2.70%), Check Capital Management Inc (2.61%).
What percentage of Sirius XM is owned by institutions?
Institutions hold 49.7% of Sirius XM's shares outstanding; insiders hold 46.35%.
Which funds own Sirius XM?
The largest fund holders of Sirius XM are iShares Core S&P Mid-Cap ETF (1.96%), JHancock Disciplined Value Mid Cap I (1.91%), Vanguard MStar Total Stk Mkt Idx Invest (1.75%), Vanguard Small Cap Index (1.24%), Vanguard MStar Small Cap Value Index (0.81%).
What is Sirius XM's short interest?
37.5M shares of Sirius XM were sold short, 18.60% of the float; at the average daily volume it would take 8.54 days to cover.
Are insiders buying or selling Sirius XM?
Of the latest 5 reported insider transactions in Sirius XM (since May 27, 2025), 0 were purchases and 5 were sales.
How many shares of Sirius XM are outstanding?
Sirius XM has 337.1M shares outstanding, of which 308.2M are in the public float.