** Manufacturing solutions co Mayville Engineering MEC.N down 9.6% to $21.30 in extended trading on proposed equity raise

** Milwaukee, Wisconsin-based MEC launches stock offering without disclosing deal size

** Co intends to use net offering proceeds to pay down revolving credit facility, for capex, working capital and other purposes

** It says a portion of amounts expected to be repaid under credit facility were borrowed to complete the Accu-fab acquisition, completed in July 2025

** William Blair and Craig-Hallum joint bookrunners for offering

** MEC has ~20.5 mln shares outstanding for about $480 mln market cap

** Stock closed down 5.5% at $23.55 on Tues, trimming YTD gain to 26%

** 2 analysts rate the stock "strong buy", 3 rate "buy"; median PT of $31 up from $25 a month ago, according to LSEG data