US Pest Index records below-average January growth

The William Blair/PCO Bookkeepers and M&A Specialists total U.S. Pest Index increased 9 percent year-over-year in January 2026, below the long-term average index growth rate of 10 percent.

“The slightly below-average result in January is likely due to disruptive weather patterns, including several major storms across the Eastern and Southern regions of the United States,” says William Blair Equity Researcher Tim Mulrooney. “The residential, commercial and termite indices decelerated in January.”

Dan Gordon, managing member of PCO Bookkeepers & M&A Specialists, adds, “Even in a weather-impacted month, the industry continued to grow well above the broader pest control market’s long-term 5 to 6 percent compound annual rate. Overall, the data suggest the fundamentals remain strong, and as weather normalizes, we would expect growth trends to revert closer to historical averages.”

The month’s results by segment include:

• The Residential Pest Index increased 13 percent year-over-year.
• The Commercial Pest Index increased 6 percent year-over-year.
• The Termite Index increased 6 percent year-over-year.
• The Bed Bug Index decreased 11 percent year-over-year.
• The Mosquito Index increased 15 percent year-over-year.

About the William Blair/PCO Bookkeepers & M&A Specialists Pest Index

The William Blair/PCO Bookkeepers & M&A Specialists Pest Index tracks the monthly performance of 146 privately held pest control companies across 38 states with combined annual 2025 revenue of $583 million. The purpose of the report is to track the monthly performance of several U.S. pest markets. It does not include residential door-to-door companies.