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SIRI · Sirius Xm Holdings Inc.

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Market Cap
$9.58B
Shares
337.07M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 607
Total Value: $8,866,048,671
Total Shares: 300,137,070
Showing 1–100 of 638 holdings by value · page 1 of 7

Institutional Ownership Trend

8 quarters

Holder Concentration

Across 607 13F filers · Δ vs Mar 31, 2026
Top Holder
41.6%
Sep 2024 → Jun 2026 · range 37.1% – 47.2%
−4.3 pts
Top 5
56.8%
Sep 2024 → Jun 2026 · range 55.7% – 64.1%
−1.4 pts
Top 10
66.6%
Sep 2024 → Jun 2026 · range 65.1% – 71.5%
−0.8 pts
HHI
1,832
Sep 2024 → Jun 2026 · range 1,514 – 2,332
Moderately concentrated−344

Quarterly Activity

vs Mar 31, 2026
New
112
Increased
207
Decreased
156
Sold Out
71
Unchanged
132
Holder count: +41
Institutional value: +41.1%
Shares held: +10.3%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 638
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 908937 CUSIP 829933100 13F (30d) 416 filings 409 filers Visit website Investor relations