Here's a roundup of high profile hedge funds who added to--or decreased--their stakes in Apple at the end of 2011. Ken Griffin, Citadel Advisors -- Citadel is the largest hedge fund holder of Apple shares. The Chicago-based firm added 361,609 shares during the fourth quarter to finish the year with 2.8 million shares. David Shaw, D.E. Shaw & Co. -- The New York-based hedge fund added only 5,760 shares to end 2011 with 2.4 million shares. Robert Citrone, Discovery Capital -- The fund bought 38,250 shares to increase its position to 2.2 million. Discovery Capital is the third largest hedge fund holder of Apple shares. Steven Mandel, Lone Pine Capital -- Mandel's fund bought 91,100 shares to bring its position to 2.1 million. Chase Coleman, Tiger Global -- New York-based Tiger Global reduced its stake in Apple, shedding 74,700 shares. It finished the year with 1.6 million shares. David Einhorn, Greenlight Capital -- Einhorn's fund added 150,000 shares to bring its total to 1.5 million. Andreas Halvorsen, Viking Global -- Viking picked up 161,700 shares during the fourth quarter of 2011. It now owns 1.3 million shares. Phillipe Laffont, Coatue Management -- The hedge fund decreased its position in Apple in 2011, selling 54,333 shares to finish the year with 1.3 million shares.