Thompson Street Capital Partners Announces the Sale of Domaille Engineering to American Industrial Partners

ST. LOUIS (December 3, 2021) – Thompson Street Capital Partners (TSCP), a private equity firm based in St. Louis, in partnership with Onward Capital, a Chicago-based private equity firm, announced today the sale of its ownership stake in Domaille Engineering (Domaille) to ADDMAN Engineering. ADDMAN is a portfolio company of American Industrial Partners, a New York-based private equity firm. Domaille was advised in the transaction by Lincoln International. Terms of the transaction were not disclosed.

Domaille is a provider of industry-leading polishing machines and fixtures, inspection equipment and associated engineered products for the rapidly growing fiber-optic cable market. The Company also engineers and manufactures complex, mission-critical products for the defense, aerospace, national security, telecommunications, energy and medical sectors.

During its ownership of Domaille, TSCP supported the Company’s growth by investing in sales and marketing strategies, strengthening the executive management team, increasing operational efficiencies, and executing several strategic acquisitions including Maryland-based Stanley Engineering and Missouri-based TECH Manufacturing.

Harry Holiday, Managing Director at TSCP, said, “Throughout our partnership with Domaille, we accelerated revenue growth and executed on a number of strategic initiatives. We are confident the Company is well positioned for continued growth with American Industrial Partners.”

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