Sirius XM Ownership | Who Owns Sirius XM?

Overview Forecast RevenueFinancials Chart Transcripts

Sirius XM Ownership Summary

Sirius XM is owned by 84.08% institutional investors, 46.35% insiders. Berkshire hathaway is the largest institutional shareholder, holding 37.15% 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	84.08%	46.35%	-30.43%
Sector	Communication Services Stocks	43.30%	18.05%	38.65%
Industry	Broadcasting Stocks	49.95%	17.59%	32.46%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Berkshire hathaway	124.81M	37.15%	$3.69B
Vanguard group	18.32M	5.42%	$366.32M
Blackrock funding, inc. /de	17.60M	5.24%	$519.97M
Dimensional fund advisors lp	10.51M	3.13%	$310.53M
Vanguard capital management	8.39M	2.50%	$247.75M
Kontiki capital management (hk)	6.08M	1.81%	$179.69M
State street	5.99M	1.78%	$177.02M
Boston partners	5.08M	1.51%	$150.17M
Gates capital management	4.54M	1.35%	$134.11M
Geode capital management	3.90M	1.16%	$115.28M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Bardin hill management partners lp	1.25M	14.40%	$35.46M
Bislett management	600.00K	12.01%	$17.72M
Kontiki capital management (hk)	6.08M	11.78%	$179.69M
Wittenberg investment management	934.86K	9.44%	$27.62M
Swisspartners advisors	413.57K	8.23%	$12.21M
Hi-line capital management	677.66K	5.63%	$20.02M
Chou associates management	409.59K	5.59%	$12.10M
Towerview	282.50K	5.47%	$8.35M
Hall kathryn a.	262.03K	3.29%	$6.10M
Gates capital management	4.54M	3.22%	$134.11M

Top Buyers

Holder	Shares	% Assets	Change
Blackrock funding, inc. /de	17.60M	0.01%	7.98M
Boston partners	5.08M	0.13%	5.08M
Dimensional fund advisors lp	10.51M	0.06%	4.21M
J. goldman & co lp	2.92M	2.23%	2.92M
State street	5.99M	0.01%	2.44M

Top Sellers

Holder	Shares	% Assets	Change
Blackrock	28.07M	0.00%	-15.71M
Impactive capital lp	-	-	-3.49M
Senvest management	-	-	-3.14M
Greenland capital management lp	-	-	-3.08M
Rafferty asset management	-	-	-3.08M

New Positions

Holder	Shares	% Assets	Change	Value
Boston partners	5.08M	0.13%	5.08M	$150.17M
Norges bank	2.09M	0.01%	2.09M	$61.80M
Sixth street partners management company	1.76M	0.01%	1.76M	$52.01M
Principal financial group	427.97K	0.01%	427.97K	$12.64M
Fund 1 investments	349.17K	1.71%	349.17K	$10.31M

Sold Out

Holder	Change
Annis gardner whiting capital advisors	-1.00
Grove bank & trust	-1.00
Hallmark capital management	-1.00
Strategic advocates	-1.00
Rakuten securities	-2.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	629	6.61%	282,504,920	9.09%	84	1.42%	321	4.22%	146	22.69%
Mar 31, 2026	576	4.16%	258,845,352	3.92%	77	1.40%	302	45.19%	116	-29.27%
Dec 31, 2025	209	-63.78%	35,845,507	-85.26%	10	0.20%	71	-67.43%	53	-69.36%
Sep 30, 2025	261	-54.92%	40,594,235	-83.49%	12	0.23%	89	-61.47%	74	-56.21%
Jun 30, 2025	571	-3.22%	244,369,306	0.94%	72	1.42%	226	-12.40%	167	-2.34%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	6.97M	2.06%	6.23M
iShares Core S&P Mid-Cap ETF	6.47M	1.92%	199.00
Vanguard MStar Total Stk Mkt Idx Invest	5.90M	1.75%	17.22K
Vanguard Morn Total Stk Mkt Idx Investor	5.88M	1.75%	9.11K
Vanguard Total Stock Mkt Idx Inv	5.88M	1.75%	9.11K
Vanguard Small Cap Index	4.26M	1.26%	8.85K
JHancock Disciplined Value Mid Cap I	2.90M	0.86%	2.90M
BlackRock Systematic Multi-Strat Instl	2.81M	0.83%	-237.74K
Vanguard MStar Small Cap Value Index	2.70M	0.80%	5.88K
Vanguard Small Cap Value Index Inv	2.70M	0.80%	-32.28K

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 84.08%, followed by 46.35% insiders and -30.43% retail investors. The average institutional ownership in Sirius XM's industry, Broadcasting Stocks , is 49.95%, which Sirius XM exceeds.

Who owns the most shares of Sirius XM?

Sirius XM’s largest shareholders are Berkshire hathaway (124.81M shares, 37.15%), Vanguard group (18.32M shares, 5.42%), and Blackrock funding, inc. /de (17.6M shares, 5.24%). Together, they hold 47.80% of Sirius XM’s total shares outstanding.

Does Blackrock own Sirius XM?

BlackRock is not among the top 10 institutional shareholders of Sirius XM.

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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