Pershing Square Capital Management doesn't support the tender offer by CVS Caremark (CVS) for Longs Drug Stores. Pershing Square, which is run by activist investor William Ackman, said that the process that led to the CVS transaction was "seriously flawed," and that the value of Longs substantially exceeds the bid of $71.50 a share. Pershing Square holds about 3.1 million shares (8.7% of the total shares outstanding). It has economic exposure to about 9.2 million notional shares (25.6% stake).

As of Aug. 22, British billionaire Sir Richard Branson held about 52 million shares (a 63.1% stake), according to a Sept. 12 filing.

Sovereign Holdings had a 9.3% stake as of Sept. 4 (about 2.83 million shares), according to a Sept. 15 filing.

From Sept. 3 to 10, Breeden Capital Management purchased about 2.66 million shares, raising its stake to 6.44%.

According to a Sept. 15 filing, William R. Gouger holds a 27.3% stake (about 79.3 million shares).

In a Sept. 15 filing, Spanish telecommunications giant Telefónica (TEF) reported that as of Sept. 4, it held a 9.9% stake (about 663.2 million shares). Telefónica added that it seeks to become the leading private shareholder in the new company that will result from the merger of China Netcom and China Unicom (CHU), expected to be completed around Oct. 15.

Carl Icahn has increased his stake to 7.33% (10.06 million shares) from 6.54%.

Mario Gabelli's Gamco Investors (GBL) has boosted its stake to 7.38% (3.08 million shares) from 5.54% (2.31 million shares).