Bill Ackman, head of the best performing large hedge fund firm, is poised to pull in at least $1 billion, according to rough CNBC calculations using his net worth, stake in $19 billion Pershing Square Capital Management and the fund's stellar 35 percent return net of fees through early December. Larry Robbins also pulled in about $600 million so far this year, according to a similar estimate. His Glenview Capital Management has surged again, gaining 12 percent in its main fund and 21 percent in a concentrated version through November, according to performance information obtained by CNBC. Glenview managed $9.9 billion as of Sept. 30. And Dan Loeb, whose main hedge fund is up 7.1 percent through November, appears set to make about $230 million this year. Third Point manages $16.5 billion. [NetNet]