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Windjammer Capital Investors of Newport Beach bought Rowmark LLC, a Findlay, Ohio-based manufacturer in the engraving, signage and awards markets, from Bertram Capital.

“Rowmark is an established market leader with strong brand recognition, supported by state-of-the-art manufacturing and an unmatched understanding of the market channel and new product development,” Windjammer Managing Director Rob Quandt said in a statement.

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Rowmark, founded in 1987, manufactures extruded plastic sheet for engraving applications. It also owns Johnson Plastics Plus, a distributor of engraving and complementary products to professional engravers. The company’s products are distributed in more than 80 countries.

Rowmark is the eighth platform investment in Windjammer’s Senior Equity Fund IV. Windjammer typically invests $40 million to $150 million in niche middle market businesses that generate more than $8 million of operating earnings.

Founded in 1990, Windjammer's institutional funds total approximately $2 billion of capital.

Kirkland & Ellis provided legal counsel and Alvarez & Marsal provided transactional due diligence. Terms of the transaction were not disclosed.