FAIRPORT, N.Y. , Sept. 13, 2022 /PRNewswire/ -- Manning & Napier, Inc. (NYSE: MN) , (" Manning & Napier " or "the Company") today reported preliminary assets under management ("AUM") as of August 31, 2022 of $18.7 billion , compared with $19.3 billion at July 31,2022 , and $18.5 billion at June