Pentair Surges Most in Two Years as Trian Reports 7.2% Stake

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Pentair Plc, a provider of water and filtration systems, gained the most in more than two years after Nelson Peltz’s Trian Fund Management said it bought a stake in the company and is urging it to buy competitors.

Pentair rose 6.7 percent to $68.75 at the close in New York, the most since November 2012.