Headquartered in Maple Grove, Minnesota, Circuit Check Holdings, Inc. (CCI) designs and manufactures test equipment for producers of electronics and electro-mechanical devices.  CCI specializes in high end test equipment and serves customers whose products have a very high cost of failure including medical devices, automotive systems, aerospace & defense, general industrial and technology products.

MMF invested $10.25 million of subordinated debt and equity to support the acquisition of CCI by North Branch Capital.