Lovell Minnick Partners has closed its previously announced buyout of Leawood, Kansas-based Tortoise Investments, an energy investment adviser. The sellers included Mariner Holdings and certain retiring co-founders of Tortoise. Among the investors that supported the transaction were HarbourVest Partners and AlpInvest Partners. BMO Capital Markets was financial adviser to Mariner Holdings while Evercore did likewise for Lovell Minnick. UBS and Credit Suisse provided committed debt financing for the transaction.