Private equity firm Thoma Bravo LLC is buying Global Healthcare Exchange LLC for an undisclosed amount.

Louisville, Colo.-based Global Healthcare operates an electronic trading exchange and provides supply-chain services to the surgical market.

Thoma Bravo, headquartered in San Francisco, has made several acquisitions lately. In January, the firm bought Meucci Solutions NV, which provides mobile fraud detection services. The firm sold Entrust Inc. to Datacard Groupin December, and in November, invested in investment management firm Segall Bryant & Hamill