Thompson Street Capital Partners (TSCP) has announced it has completed a growth investment in OpenClinica.

OpenClinica, based in Waltham, Mass., is a clinical research solutions provider. Founded in 2004, the company supports biopharmaceutical companies, contract research organizations, academic institutions and government agencies.

TSCP, based in St. Louis, Mo., targets investments in middle market companies. Founded in 2000, the firm typically invests in healthcare and a few other sectors. Within healthcare, areas of interest include pharmaceutical logistics, connected health, and regulatory and compliance.

Terms of the investment were not disclosed.