Using block share acquisitions made by private equity (PE) funds, we examine the sources of value gains in PE minority equity investments. We find that compared with non-PE acquirers, PE acquirers are more likely to place representatives with finance experience or those with experience in the target's industry on the target's board when the need for target oversight and/or advice is higher. The targets in PE acquisitions, particularly poorly performing targets, targets with high R&D intensity, and targets with PE-appointed directors who have experience in the target's industry, realize both higher announcement returns and better post-acquisition operating performance than do targets in non-PE acquisitions. These findings suggest that the governance and operational engineering that PE acquirers apply to their targets constitutes important sources of value creation in PE minority equity investments.