The William Blair/PCO Bookkeepers & M&A Specialists total U.S. Pest Index increased 9 percent year-over-year in April 2026, below the long-term average index growth rate of 10 percent.
“The Pest Index decelerated in April, following a strong print in March, which was up 13 percent year-over-year,” says William Blair Equity Researcher Tim Mulrooney. “The residential, commercial, and termite indices all slowed down by several percentage points in April. Although national average temperatures were slightly warmer this April relative to prior years, it did not materialize into a tailwind for the Pest Index.”
Dan Gordon, managing member of PCO Bookkeepers & M&A Specialists, adds, “April’s results reflect a moderation in pest activity following a strong March. Importantly, the underlying fundamentals of the pest control industry remain healthy.”
The month’s results by segment include:
- The Residential Pest Index increased 12 percent year-over-year.
- The Commercial Pest Index increased 6 percent year-over-year.
- The Termite Index increased 9 percent year-over-year.
- The Bed Bug Index decreased 2 percent year-over-year.
- The Mosquito Index increased 6 percent year-over-year.
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The William Blair/PCO Bookkeepers & M&A Specialists Pest Index tracks the monthly performance of 162 privately held pest control companies across 40 states with combined annual 2025 revenue of $646 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. Learn more.
