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SIRI Ownership Summary

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Institutional Ownership

Shares Outstanding

Institutional Summary

Total Number of Holders	445
% of Shares Outstanding	49.87%
Total Shares Held	1,895,692,612
Total Value of Holdings	3,658,686,741
Net Activity	301,142,723

Top 5 Holders

UBS AG	233,415,325
VANGUARD GROUP INC	169,915,413
WELLINGTON MANAGEMENT CO LLP	168,583,148
SAC CAPITAL ADVISORS LP	98,267,455
BARCLAYS GLOBAL INVESTORS UK HOLDINGS LTD	89,181,833

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Insider Trades

Buys/Sells/Total Trades

Insider Trades Summary

Trade Type	Last 3 Mo.	Last 12 Mo.
Number of Buys	2	2
Number of Sells	6	15
Total Insider Trades	8	17
Net Activity	32,917,015	7,974,777

Top 5 Insider Trades

LIBERTY MEDIA CORP	44,350,000
LIBERTY MEDIA CORP	16,000,000
KARMAZIN MEL	7,850,000
MEYER JAMES E	7,066,666
KARMAZIN MEL	5,965,800

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SIRI Ownership Overview:

Sirius XM Radio Inc. (SIRI) Ownership Summary provides a snapshot of institutional holdings and activity for a particular stock. The institutional holdings summary data encompasses the holdings and change from most recent 13F filings. The insider filer data counts the number of monthly positions over 3 month and 12 month time spans. Summary data is calculated daily, using the most up to date information available.