Sirius XM Holdings Inc.
Sirius XM Holdings Inc. (SIRI) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · SIRI · as of Mar 31, 2025
Ownership Breakdown
597
Institutional Holders
▼ 16 vs Q4
$5.65B
Total Inst. Value
▼ $152.48M vs Q4
336.62M
Shares Outstanding
freeFloat 90.42%
249.60M
13F Shares Held
▼ 4.80M vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
SIRI largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BERKSHIRE HATHAWAY INC radio broadcasting stations | 119.78M | 35.33% | 35.33% | $2.70T | May 15, 2025 | ▲ 2.31M |
VANGUARD GROUP INC radio broadcasting stations | 19.74M | 5.82% | 5.82% | $445.15B | May 9, 2025 | ▼ 1.75M |
BLACKROCK, INC. radio broadcasting stations | 8.93M | 2.63% | 2.63% | $201.22B | May 2, 2025 | ▼ 586.9K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP radio broadcasting stations | 5.44M | 1.60% | 1.60% | $122.65B | May 14, 2025 | ▲ 619.3K |
D. E. SHAW & CO., INC. radio broadcasting stations | 4.40M | 1.30% | 1.30% | $99.13B | May 15, 2025 | ▲ 1.34M |
FPR PARTNERS LLC radio broadcasting stations | 4.40M | 1.30% | 1.30% | $99.10B | May 14, 2025 | ▼ 1.96M |
GEODE CAPITAL MANAGEMENT, LLC radio broadcasting stations | 4.03M | 1.19% | 1.19% | $90.99B | May 13, 2025 | ▲ 117.4K |
STATE STREET CORP radio broadcasting stations | 3.69M | 1.09% | 1.09% | $83.23B | May 15, 2025 | ▼ 52.4K |
JPMORGAN CHASE & CO radio broadcasting stations | 3.60M | 1.06% | 1.06% | $81.27B | May 12, 2025 | ▼ 5.70M |
FULLER & THALER ASSET MANAGEMENT, INC. radio broadcasting stations | 3.58M | 1.06% | 1.06% | $80.63B | May 13, 2025 | ▲ 3.11M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
27
Increased
+19.73M shares1
New Positions
first time holders20
Decreased
−14.47M shares0
Sold Out
fully exitedNet shares change (top 50)
+5.26M
+19.73M / −14.47M
Net new holders
+8
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
SIRI insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
8
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
BERKSHIRE HATHAWAY INC 10 percent owner | Aug 4, 2025 | Purchase | 1,037,199 | $21.63 | $22.43M | 124.81M | Form 4 ↗ |
BERKSHIRE HATHAWAY INC 10 percent owner | Aug 1, 2025 | Purchase | 1,930,000 | $21.02 | $40.57M | 123.77M | Form 4 ↗ |
BERKSHIRE HATHAWAY INC 10 percent owner | Jul 31, 2025 | Purchase | 85,389 | $21.43 | $1.83M | 121.84M | Form 4 ↗ |
BERKSHIRE HATHAWAY INC 10 percent owner | Jul 31, 2025 | Purchase | 1,977,837 | $21.04 | $41.62M | 121.75M | Form 4 ↗ |
BERKSHIRE HATHAWAY INC 10 percent owner | Feb 3, 2025 | Purchase | 283,899 | $24.05 | $6.83M | 119.78M | Form 4 ↗ |
BERKSHIRE HATHAWAY INC 10 percent owner | Feb 3, 2025 | Purchase | 433,079 | $23.49 | $10.17M | 119.49M | Form 4 ↗ |
BERKSHIRE HATHAWAY INC 10 percent owner | Jan 31, 2025 | Purchase | 840,000 | $23.62 | $19.84M | 119.06M | Form 4 ↗ |
BERKSHIRE HATHAWAY INC 10 percent owner | Jan 30, 2025 | Purchase | 751,141 | $22.79 | $17.12M | 118.22M | Form 4 ↗ |
BERKSHIRE HATHAWAY INC 10 percent owner | Dec 19, 2024 | Purchase | 31,326 | $21.52 | $674.1K | 117.47M | Form 4 ↗ |
BERKSHIRE HATHAWAY INC 10 percent owner | Dec 19, 2024 | Purchase | 2,038,051 | $20.85 | $42.49M | 117.44M | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Sirius XM Holdings Inc. (SIRI) is primarily owned by institutional investors, who hold approximately 74.2% of total shares outstanding. Company insiders own approximately 9.58%, while retail and public investors account for the remaining 16.27%.
The largest institutional shareholder of Sirius XM Holdings Inc. is BERKSHIRE HATHAWAY INC, holding approximately 119.78 million shares — equal to 35.33% of outstanding shares — as of March 31, 2025.
A total of 597 institutional investors currently hold SIRI stock, with a combined institutional value of approximately $5.65 billion as of the most recent 13F filing period.
Frequently asked questions
SIRI ownershipSirius XM Holdings Inc. (SIRI) is primarily owned by institutional investors, who hold approximately 74.2% of shares. The largest shareholder is BERKSHIRE HATHAWAY INC with a 35.33% stake. Company insiders hold 9.58%. Data sourced from SEC Form 13F as of March 31, 2025.