What's behind Pentair's sharp forecast cut and stock selloff?

Pentair shares slumped about 17 percent after the US water technology company sharply cut its full-year 2026 revenue and earnings guidance, citing a deeper-than-expected slowdown in its pool equipment business and prolonged inventory destocking. The company now expects revenue to decline 4-7 percent versus prior guidance of 2-4 percent growth, and lowered adjusted EPS guidance to $4.60-$4.80 from $5.30-$5.40, erasing nearly $2 billion in market value and dragging the stock to a fresh 52-week low. The warning has raised concerns across the pool equipment industry, including suppliers Pool Corp and Hayward Holdings.