FAIRPORT, N.Y. , June 10, 2021 /PRNewswire/ -- Manning & Napier, Inc. (NYSE: MN), (" Manning & Napier " or "the Company") today reported preliminary assets under management ("AUM") as of May 31, 2021 of $22.1 billion , compared with $21.9 billion at April 30, 2021 . AUM by investment vehicle and