Pentair Stock Tanked on an Alarming Update. It Took These Stocks With It.

Shares of water technology company Pentair plummeted Wednesday after the company slashed full-year guidance, reported lower-than-expected earnings, and said its chief financial officer resigned. Wednesday morning, Pentair said it expects 2026 full-year sales to drop 4% to 7%—a sharp reversal from its previous guidance of 2% to 4% sales growth. Pentair’s preliminary results for the second quarter were also sharply lower than expectations.