Tonka Bay Announces Sale of Circuit Check

MINNETONKA, Minn.  (January 12, 2016) — Tonka Bay Equity Partners LLC announces the sale of Circuit Check, Inc. (“CCI”) to North Branch Capital, a Chicago-based private equity firm.  Based in Maple Grove, Minnesota, CCI is a leading global manufacturer of test interfaces for electronic and electro-mechanical devices for customers in a variety of end markets.

Tonka Bay led the buyout of CCI in January 2007 in partnership with Greg Michalko, CEO.  During Tonka Bay’s ownership period it successfully accelerated the company’s growth by developing the senior management team, building an outside board of directors with industry experience, executing a strategy focused on functional test systems, and completing a strategic acquisition in Canada.

“Given their global leadership position in test solutions, in-circuit and functional test fixtures for printed circuit board manufacturers, compelling customer value proposition, and strong engineering focus, CCI proved to be a successful investment for Tonka Bay,” said Peter Kooman, Partner at Tonka Bay.  “Greg Michalko and his management team have done a tremendous job establishing the company as a leader in functional test systems.” 

“Tonka Bay has been a value-added partner,” said Greg Michalko, CEO of CCI.  “They have provided guidance and capital to make strategic investments, which has allowed us to accelerate growth and further differentiate CCI as a global leader of test solutions for the printed circuit board industry.”

About Circuit Check

Since 1979, manufactures have relied upon Circuit Check for test fixtures and innovative engineering. Our mission is to deliver innovative testing solutions that exceed your expectations, and to understand your needs for excellence in design and manufacturing.  Learn more at

About Tonka Bay Equity Partners
Based in Minnetonka, Minnesota, Tonka Bay has been Building Bigger, Better Businesses® for over 25 years. Tonka Bay Equity Partners is a private equity firm that acquires and invests in growth-oriented businesses in the highly engineered manufacturing, business services and value-added distribution sectors. For more information, call (952) 345-2030 or visit

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