Equity Ventures has a partnership with two former top officials of Mandalay Resort Group for a state-owned casino in south-central Kansas. Equity spokeswoman Nancy Seitz says the Topeka firm and its partners will file an application for the Sumner County casino with the Kansas Lottery before the 5 p.m. Wednesday deadline. The partners are Mike Ensign, former CEO of Mandalay, and Peter Simon, a senior vice president.