Linden Capital Partners has announced the close of a new fund.

The fund — Linden Structured Capital Fund II — closed with $400 million of commitments. It is focused on investing in middle market healthcare companies via securities with debt- and equity-like features.

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.