Louisville window manufacturer Alpen raises $6M Series B

LOUISVILLE — Alpen High Performance Products Inc., a high-efficiency window manufacturer in Louisville, recently closed a $6 million Series B fundraising round led by Inherent Capital and Arborview Capital.

The company, which claims 50% growth of the past two and a half years, said this week that after the round, it “is well positioned to optimize its manufacturing operations, expand its capacity, and maintain the strategic direction that has fueled its recent success.”

Alpen’s Series B, which had an initial target of $10 million, came on the heels of a 2024 fundraising effort that brought in $18 million through a combination of investments and a grant from the U.S. Department of Energy.

“This capital injection is a massive vote of confidence in our team and the work we do every day,” Alpen CEO Andrew Zech said in the release. “Over the last three years, we have fundamentally transformed how Alpen operates. We have transitioned from a bespoke manufacturer into a national brand with a scaled and standardized product suite, and this funding ensures we have the necessary operating capital to meet growing demand.”

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