** Lobbying firm Public Policy Holding PPHC.L set to begin trading on the Nasdaq on Wednesday under the symbol "PPHC"
** PPHC and some of its backers sold 4.15 million shares at $12.25 apiece in U.S. IPO to raise roughly $50.8 million
** Stock will be released for quotation at 9:50 a.m. ET, according to Nasdaq
** Oppenheimer and Canaccord Genuity were lead bookrunning managers for offering
** PPHC already trades on the AIM market of the London Stock Exchange
** Its portfolio of lobbying firms includes Crossroads Strategies and Forbes Tate Partners
(Reporting by Arasu Kannagi Basil in Bengaluru)
((ArasuKannagi.Basil@thomsonreuters.com;))