Linden Capital Partners and Audax Private Equity have invested in StatLab Medical Products, according to a news release.

StatLab, based in McKinney, Texas, is a manufacturer and distributor of consumables, reagents and equipment used by anatomic pathology, molecular diagnostics and other laboratories. Founded in 1976, the company provides more than 5,000 diagnostic products and equipment.

Linden, based in Chicago, is a private equity firm focused exclusively on the healthcare industry. Founded in 2004, the firm pursues acquisition opportunities across the healthcare industry, including services, products and distribution companies, and prefers to make more substantial investments from a dollars perspective.

Audax, with private equity offices in Boston, New York and San Francisco, focuses on investments in middle market companies and has a wide flexibility on investment size. Founded in 1999, the firm targets companies within healthcare and several other industries, specifically those generating between $10 million and $50 million in annual EBITDA.

Terms of the investment were not disclosed.