The William Blair/PCO Bookkeepers & M&A Specialists total U.S. Pest Index increased 7 percent year-over-year in August 2026, below the long-term average index growth rate of 10 percent. A result above 10% is a sign of strength for the month, and a reading below 10% is a sign of softness for the month.

“The last five months have been below the long-term average and there was no improvement in August,” says William Blair Equity Researcher Tim Mulrooney.

Dan Gordon, managing member of PCO Bookkeepers & M&A Specialists, adds, “At this point, the data suggests that the industry is experiencing a sustained period of softer growth rather than a single-month fluctuation. We’ll be watching the next few months closely to see whether this is a temporary slowdown or the beginning of a longer-term shift in the industry’s growth rate.”

The month’s results by segment include:

• The Residential Pest Index increased 7 percent year-over-year.
• The Commercial Pest Index increased 10 percent year-over-year.
• The Termite Index increased 4 percent year-over-year.
• The Bed Bug Index was flat year-over-year.
• The Mosquito Index decreased 3 percent year-over-year.

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The William Blair/PCO Bookkeepers & M&A Specialists Pest Index tracks the monthly performance of 159 privately held pest control companies across 40 states with combined annual 2025 revenue of $633 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.