Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in SIRI held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BERKSHIRE HATHAWAY INC | 124.8M | $2.88B | 0.0% | 37.084% | 1.09% |
| 2 | BlackRock, Inc. | 9.6M | $222.1M | -4.2% | 2.860% | 0.00% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 8.7M | $200.9M | — | 2.587% | 0.01% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 8.3M | $191.6M | — | 2.467% | 0.00% |
| 5 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 6.9M | $160.4M | -29.2% | 2.064% | 0.02% |
| 6 | DIMENSIONAL FUND ADVISORS LP | 6.3M | $145.4M | +262.1% | 1.872% | 0.03% |
| 7 | Kontiki Capital Management (HK) Ltd. | 5.7M | $131.5M | -4.5% | 1.693% | 9.22% |
| 8 | CITADEL ADVISORS LLC | 4.9M | $113.6M | — | 1.462% | 0.05% |
| 9 | GOLDMAN SACHS GROUP INC | 4.0M | $93.1M | — | 1.198% | 0.01% |
| 10 | CANADA PENSION PLAN INVESTMENT BOARD | 3.9M | $89.1M | +105.9% | 1.147% | 0.06% |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | 3.7M | $85.6M | +0.5% | 1.101% | 0.01% |
| 12 | STATE STREET CORP | 3.5M | $81.9M | +1.7% | 1.054% | 0.00% |
| 13 | AQR CAPITAL MANAGEMENT LLC | 3.0M | $68.3M | +106.1% | 0.888% | 0.03% |
| 14 | CHECK CAPITAL MANAGEMENT INC/CA | 2.9M | $67.9M | +2.1% | 0.874% | 1.98% |
| 15 | Gates Capital Management, Inc. | 2.7M | $63.3M | — | 0.815% | 2.18% |
| 16 | AMERIPRISE FINANCIAL INC | 2.4M | $55.7M | +1.7% | 0.718% | 0.01% |
| 17 | Bank of New York Mellon Corp | 2.2M | $50.3M | +7.8% | 0.647% | 0.01% |
| 18 | MORGAN STANLEY | 2.2M | $49.8M | +26.0% | 0.641% | 0.00% |
| 19 | SEIZERT CAPITAL PARTNERS, LLC | 1.8M | $42.5M | -3.1% | 0.547% | 1.96% |
| 20 | TWO SIGMA INVESTMENTS, LP | 1.8M | $42.3M | -28.4% | 0.544% | 0.03% |
| 21 | HSBC HOLDINGS PLC | 1.8M | $41.6M | — | 0.534% | 0.02% |
| 22 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.7M | $40.2M | +6.9% | 0.517% | 0.01% |
| 23 | PRIVATE MANAGEMENT GROUP INC | 1.4M | $31.2M | +0.5% | 0.402% | 0.90% |
| 24 | WEITZ INVESTMENT MANAGEMENT, INC. | 1.3M | $29.8M | -6.6% | 0.384% | 2.08% |
| 25 | Gotham Asset Management, LLC | 1.2M | $28.6M | +46.9% | 0.368% | 0.09% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in SIRI — a direct measure of their conviction.
Filings activity in SIRI during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new SIRI position in Q1 2026
Institutions that fully closed their SIRI position in Q1 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 540 | +9.3% | 62.88% | +11.46 pp | $5.82B | +22% |
| Q4 2025 | 494 | 4.1% | 51.42% | 10.40 pp | $4.76B | 17% |
| Q3 2025 | 515 | 3.0% | 61.82% | +1.51 pp | $5.73B | +2.5% |
| Q2 2025 | 531 | 1.1% | 60.31% | 0.12 pp | $5.59B | 0.2% |
| Q1 2025 | 537 | +2.1% | 60.43% | 2.34 pp | $5.60B | 3.7% |
| Q4 2024 | 526 | +10% | 62.77% | 0.47 pp | $5.81B | 0.7% |
| Q3 2024 | 477 | +47600% | 63.24% | +63.24 pp | $5.86B | +15240055% |
| Q2 2024 | 1 | — | 0.00% | — | $0M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying SIRI stock.
Based on Q1 2026 13F filings, institutional ownership of Sirius XM Holdings Inc. stands at 62.9%, held across 540 reporting institutions.
BERKSHIRE HATHAWAY INC is the largest reported institutional holder of SIRI, with approximately 124,807,117 shares worth $2.88B as of Q1 2026.
Yes — 4 widely-followed marquee investors appear among the top 25 institutional holders of SIRI, including BERKSHIRE HATHAWAY INC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, CITADEL ADVISORS LLC, TWO SIGMA INVESTMENTS, LP.
Our composite Smart Money Score for SIRI is 78 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
126 institutions opened new positions in SIRI during Q1 2026, while 80 fully exited. 352 added to existing positions and 57 trimmed.
SIRI institutional ownership rose by 11.46 percentage points quarter-over-quarter, with a net change of +46 holders.
The top 10 institutions account for 72.6% of all reported 13F value in SIRI, and the top 25 account for 86.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Sirius XM Holdings Inc. (SIRI) Institutional Ownership