Bill Ackman’s Pershing Square Capital Management has re-entered the ranks of the world’s 20 best performing hedge funds following a bumper year for the New York money manager after it previously dropped off the list in 2015. The New York fund, which has $17.9 billion in assets under management (AUM), generated net gains worth $3.5 billion in 2023, bringing its overall gains since its inception in 2004 up to $18.8 billion, research by LCH Investments shows.   Pershing Square’s huge gains saw it supplant Loui ...