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This week-end I wrote an article about Sirius XM (SIRI), and warned investors that the stock might dip this week if CEO Mel Karmazin sells another chunk of his 'charitable' shares/options. Seeking Alpha member "ses" challenged me to investigate the ownership of Liberty Media (LMCA), which owns 46.2% of the satellite company. Are they institutions, hedge funds, or retail owners? Do some of them own both companies?

Sirius is the largest investment that Liberty has, and when its share price is down, it drags Liberty down. I decided to check it out, and I was really surprised with the results over the last five years:

Chart forSIRIUS XM Radio Inc.

To say the two are joined at the hip would be a major understatement. As I said in the other article, I do not think that Liberty is intentionally trying to drive the Sirius XM price down. This would be like literally shooting yourself in the foot.

Institutions own over 53% of the common shares of Sirius. And that number has gone up dramatically in the last month. But that is nothing compared to the institutional ownership of Liberty. According to Yahoo Financial:

Breakdown

% of Shares Held by All Insider and 5% Owners:9%
% of Shares Held by Institutional & Mutual Fund Owners:85%
% of Float Held by Institutional & Mutual Fund Owners:93%
Number of Institutions Holding Shares:384

Is that right? Ninety-three percent of the float is owned by Institutions and mutual funds? That is a very high number, which means there are very few retail investors that own Liberty. Here are the top owners according to the most recent results:

Top Institutional Holders

HolderShares% OutValue*Reported
Horizon Kinetics LLC5,409,6214.82476,858,091Mar 30, 2012
Clearbridge Advisors, LLC4,675,5304.17364,925,116Dec 30, 2011
Capital World Investors4,611,7654.11406,527,084Mar 30, 2012
VANGUARD GROUP, INC. (THE)3,161,1442.82278,654,843Mar 30, 2012
OZ MANAGEMENT, L.L.C.3,103,5902.77273,581,458Mar 30, 2012
BERKSHIRE HATHAWAY, INC3,000,0002.68264,450,000Mar 30, 2012
BlackRock Institutional Trust Company, N.A.2,773,9552.47244,524,133Mar 30, 2012
Capital Research Global Investors2,547,5582.27224,567,237Mar 30, 2012
LONE PINE CAPITAL, LLC2,263,2622.02199,506,545Mar 30, 2012
KENSICO CAPITAL MANAGEMENT CORP2,237,0001.99197,191,550Mar 30, 2012
Top Mutual Fund Holders
HolderShares% OutValue*Reported
GROWTH FUND OF AMERICA INC4,391,3003.92387,093,095Mar 30, 2012
VANGUARD TOTAL STOCK MARKET INDEX FUND1,295,9261.16101,147,024Dec 30, 2011
Munder Mid-Cap Core Growth Fund1,253,4461.1297,831,460Dec 30, 2011
BARON SMALL CAP FUND1,250,0001.1197,562,500Dec 30, 2011
Legg Mason Clearbridge Aggressive Growth Fd1,061,3010.9593,553,683Mar 30, 2012
PRINCIPAL MID CAP BLEND FD1,045,7010.9392,178,543Mar 30, 2012
AMERICAN FDS INSURANCE SER-GROWTH FD1,008,9390.9088,937,972Mar 30, 2012
SMALLCAP WORLD FUND938,9120.8482,765,092Mar 30, 2012
VANGUARD EXTENDED MARKET INDEX FUND899,0450.8070,170,462Dec 30, 2011
FIDELITY CONTRAFUND INC747,3750.6765,881,106Mar 30, 2012

There are a couple of the funds that own both Liberty and Sirius, but most of them are different. However, this big institutional ownership could become important in the FCC battle for de facto control of Sirius. Just yesterday Sirius filed a Petition of Opposition in answer to Liberty's Petition for Reconsideration.

First of all, the Sirius legal team has made a splendid case against Liberty getting control. But more importantly, agencies such as the FCC tend to consider the public interest and the little guy ahead of the big boys. If it comes to a close decision (which I don't think it will), I think the government will side with over a million retail investors at Sirius versus all of the institutions at Liberty. And to get turned down a second time will not be good for Liberty.

Disclosure: I am long SIRI.