Thomas H. Lee Partners (THL) has announced it has closed its THL Automation Fund at $900 million.

THL indicated the fund will pursue equity investment opportunities that harness a range of technologies driving automation in healthcare and several other sectors.

THL, based in Boston, is a private equity firm investing in middle market growth companies in three sectors, including healthcare. Founded in 1974, the firm typically targets companies with enterprise values between $250 million and $2.5 billion.