Forest Park In St. Louis, Missouri
Forest Park In St. Louis, Missouri

Thompson Street Capital Partners Portfolio Company PestCo Holdings Acquires Southwest Exterminating

ST. LOUIS (December 9, 2025)

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Thompson Street Capital Partners (TSCP), a private equity firm based in St. Louis, today announced the acquisition of Southwest Exterminating (Southwest) by PestCo Holdings, LLC (PestCo), a growth-oriented, national provider of pest control services to residential and commercial customers and a TSCP portfolio company. Based in Houston, TX, Southwest is a leading provider of commercial and residential pest control services in Texas. This acquisition represents a strategic expansion in the Houston market, one of the fastest growing cities in the U.S. Terms of the transaction were not disclosed.

“We are excited to expand our presence in the great state of Texas and specifically in the Houston market with the addition of Southwest Exterminating. We will strive to earn the loyalty of these customers while expanding opportunities to our Team Members across the U.S.,” said Jay Keating, CEO of PestCo.

Nick and Susan Spillios, owners of Southwest Exterminating, added, “Southwest Exterminating has been a huge part of our lives and the lives of so many great people in the greater Houston area.  Since our founding in 1969, the Spillios family built something we’re truly proud of, grounded in integrity, service, and a commitment to doing right by our team and our customers. As we begin this new chapter with PestCo, we’re confident we’ve found the right partner to carry that legacy forward. Their values align with ours, and we know they’ll continue to take care of the people and the communities we’ve worked so hard to serve.”

“Thompson Street is pleased to support PestCo’s continued expansion in Texas through the acquisition of Southwest, a well-established provider in the region,” said Dan Cooper, Managing Director at TSCP.