Tom Hicks and team at Dallas-based Hicks Holdings LLC have filed an S-1 to IPO Hicks Acquisition Co. I Inc., offering an estimated 40 million shares and warrants that may raise some $460 million. Citi is the underwriter. The blank-check Hicks Acquisition aims to acquire businesses and assets in no specified sector, according to the SEC filing. Hicks Holdings is currently invested in E&P company Berkshire Resources LLC, and previously invested in producer Triton Energy Ltd., which was sold to Hess Corp. in 2001. It is also invested currently in Latrobe Specialty Steel Co., a specialty steel manufacturer. Hicks co-founded Hicks, Muse, Tate & Furst that had private-equity investments of more than $12 billion in its 15-year run.