Endurance Investment Partners, a new private‑equity vehicle launched last year, is hunting $350 million to acquire stakes in mature energy firms that sit in aging funds. The firm presents two completed deals as proof of concept for its debut fund.

Backed by Rice Investment Group, the vehicle leverages the wealth of the Rice family, whose brothers Toby, Daniel, and Derek control EQT Corp., the nation’s largest natural‑gas producer. Their takeover of EQT a decade ago followed a proxy battle that ousted rivals after EQT acquired Rice Energy.

By focusing on secondary interests in established energy assets, Endurance aims to tap a market where liquidity needs grow as older funds wind down. Investors eye the deal for its potential to generate steady cash flows from proven operations, offering an alternative to high‑growth, high‑risk energy plays.