Current private equity owner Genstar will still own a stake in the RIA firm. : New York-based private equity firm Oak Hill Capital will purchase an equity stake in Mercer Advisors, the $16.5 billion registered investment advisor, from its current owners Genstar Capital and Lovell Minnick Partners. As part of a recapitalization, Genstar will still own a stake in the RIA. Terms of the deal were not disclosed.