Frazier Healthcare Partners has acquired a 50% stake in CSafe Global from Thomas H. Lee Partners (THL), according to a news release.

CSafe Global, based in Dayton, Ohio, is a provider of cold chain shipping solutions to global pharmaceutical and life sciences companies.

Frazier Healthcare Partners, based in Seattle, is a provider of private equity capital to healthcare companies. The firm, founded in 1991, prefers to make more substantial investments from a dollars perspective and pursues a wide range of investment types, including company creation and venture capital to buyouts of profitable lower-middle market companies.

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.

Terms of the acquisition were not disclosed.