Texas County & District Retirement System, Austin, committed $75 million to EnCap Energy Capital Fund X, a transaction report on the $24.6 billion pension fund's website showed.
The oil and gas fund is managed by EnCap Investments.
The pension fund previously committed $1.84 million to co-investment fund EnCap Energy Capital Fund VIII Co-Investors in March 2014.
As of Sept. 30, the pension fund had an 8.6% actual allocation to private equity and 12% target.