Calamos Asset Management ( CLMS ) reported a 64% jump in its quarterly profit Tuesday, as assets under management rose to $42.2 billion. The Naperville, Ill., firm earned $7.64 million, or 33 cents a share, for the third quarter, up from $4.67 million, or 20 cents a share, on a pro forma basis in the prior year. Calamos uses pro forma results for the comparisons because of the company's 2004 reorganization and initial public offering. Analysts' mean estimate called for a profit of 30 cents a share, according to Thomson First Call. Assets under management were $42.2 billion as of Sept. 30, up 27% from $33.2 billion from the prior year, according to Calamos. Revenue rose 33% to $107.7 million from $81.2 million year earlier.