Sirius XM Ownership | Who Owns Sirius XM?

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Sirius XM Ownership Summary

Sirius XM is owned by 72.30% institutional investors, 45.78% insiders. Berkshire hathaway is the largest institutional shareholder, holding 35.44% of SIRI shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.06% of its assets in Sirius XM shares.

SIRI Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Sirius XM	72.30%	45.78%	-18.08%
Sector	Communication Services Stocks	46.53%	15.90%	37.58%
Industry	Entertainment Stocks	48.89%	18.17%	32.94%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Berkshire hathaway	119.78M	35.44%	$2.75B
Blackrock funding, inc. /de	8.67M	2.56%	$199.07M
Kontiki capital management (hk)	6.74M	1.99%	$154.83M
Point72 asset management	4.20M	1.24%	$96.37M
Lsv asset management	3.19M	0.94%	$73.36M
Blackrock	28.07M	0.73%	$79.45M
Seizert capital partners	2.04M	0.60%	$46.90M
Alberta investment management	1.49M	0.44%	$34.14M
Geode capital management	13.96M	0.36%	$39.52M
State street	12.87M	0.33%	$36.42M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Bardin hill management partners lp	1.25M	14.40%	$35.46M
Bislett management	773.31K	12.15%	$17.76M
Wittenberg investment management	1.10M	11.07%	$25.34M
Kontiki capital management (hk)	6.74M	8.84%	$154.83M
Chou associates management	702.46K	8.82%	$16.14M
Swisspartners advisors	312.12K	6.75%	$7.16M
Hi-line capital management	524.09K	4.26%	$12.04M
Hall kathryn a.	262.03K	3.33%	$6.02M
Aldebaran capital	112.79K	2.56%	$2.59M
Seizert capital partners	2.04M	2.06%	$46.90M

Top Buyers

Holder	Shares	% Assets	Change
Kontiki capital management (hk)	6.74M	8.84%	6.74M
Susquehanna group, llp	5.92M	0.00%	4.91M
Point72 asset management	4.20M	0.19%	4.20M
Jpmorgan chase	11.65M	0.00%	4.02M
Cubist systematic strategies	1.83M	0.04%	1.83M

Top Sellers

Holder	Shares	% Assets	Change
Vanguard group	-	-	-31.00M
Blackrock	28.07M	0.00%	-15.71M
State street	12.87M	0.00%	-14.14M
Jane street group	-	-	-13.54M
Citigroup	-	-	-13.36M

New Positions

Holder	Shares	% Assets	Change	Value
Kontiki capital management (hk)	6.74M	8.84%	6.74M	$154.83M
Cubist systematic strategies	1.83M	0.04%	1.83M	$5.19M
Norges bank	1.01M	0.00%	1.01M	$2.85M
Susquehanna portfolio strategies	200.93K	0.10%	200.93K	$4.62M
Old west investment management	140.37K	1.06%	140.37K	$3.22M

Sold Out

Holder	Change
Hallmark capital management	-1.00
Grove bank & trust	-1.00
Rakuten securities	-2.00
Tfo-tdc	-5.00
Johnson financial group	-10.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2025	571	-3.22%	244,369,306	0.94%	72	1.42%	226	-12.40%	167	-2.34%
Mar 31, 2025	587	-3.45%	246,422,132	-2.78%	72	1.29%	254	-13.31%	172	-2.27%
Dec 31, 2024	9	-52.63%	168,101	-81.87%	-	66.29%	4	-33.33%	-	-100.00%
Sep 30, 2024	18	-97.05%	864,582	-99.80%	-	0.19%	6	-97.67%	9	-95.00%
Jun 30, 2024	605	-11.16%	441,336,106	21.37%	11	12.80%	253	-13.36%	178	-1.11%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	6.97M	2.06%	6.23M
Vanguard Total Stock Mkt Idx Inv	5.86M	1.74%	-123.25K
Vanguard Small Cap Index	4.51M	1.34%	-30.38K
Vanguard Small Cap Value Index Inv	2.91M	0.86%	9.32K
Vanguard Institutional Extnd Mkt Idx Tr	2.36M	0.70%	-1.03M
FullerThaler Behavioral Small-Cap Growth	1.94M	0.57%	1.94M
Smead Value Investor	1.93M	0.57%	-85.57K
Smead US Value Composite	1.93M	0.57%	-91.82K
FullerThaler Behavioral Sm-Cp Gr R6	1.92M	0.57%	-
Strategic Advisers U.S. Total Stock{mg}	1.68M	0.50%	1.68M

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 04, 2025	BERKSHIRE HATHAWAY INC	-	Buy	$22.43M
Aug 01, 2025	BERKSHIRE HATHAWAY INC	-	Buy	$40.57M
Aug 01, 2025	BERKSHIRE HATHAWAY INC	-	Buy	$40.57M
Jul 31, 2025	BERKSHIRE HATHAWAY INC	-	Buy	$1.83M
Aug 04, 2025	BERKSHIRE HATHAWAY INC	-	Buy	$22.43M

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	8	-
2025 Q1	4	-
2024 Q4	15	-
2024 Q3	-	-
2023 Q4	-	-

SIRI Ownership FAQ

Who Owns Sirius XM?

Sirius XM shareholders are primarily institutional investors at 72.30%, followed by 45.78% insiders and -18.08% retail investors. The average institutional ownership in Sirius XM's industry, Entertainment Stocks , is 48.89%, which Sirius XM exceeds.

Who owns the most shares of Sirius XM?

Sirius XM’s largest shareholders are Berkshire hathaway (119.78M shares, 35.44%), Blackrock funding, inc. /de (8.67M shares, 2.56%), and Kontiki capital management (hk) (6.74M shares, 1.99%). Together, they hold 40.00% of Sirius XM’s total shares outstanding.

Does Blackrock own Sirius XM?

Yes, BlackRock owns 0.73% of Sirius XM, totaling 28.07M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 79.45M$. In the last quarter, BlackRock decreased its holdings by -15.715M shares, a -35.89% change.

Who is Sirius XM’s biggest shareholder by percentage of total assets invested?

Bardin hill management partners lp is Sirius XM’s biggest shareholder by percentage of total assets invested, with 14.40% of its assets in 1.25M Sirius XM shares, valued at 35.46M$.

Who is the top mutual fund holder of Sirius XM shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of Sirius XM shares, with 2.06% of its total shares outstanding invested in 6.97M Sirius XM shares.

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