Pentair plc (PNR) is an American water treatment company incorporated in Ireland with tax residency in UK, with its main U.S. office in Golden Valley, Minnesota. Pentair was founded in the US, with 65% of company's revenue coming from the US and Canada as of 2017. PNR was reorganized in 2014, shifting the corporate domicile from Switzerland to Ireland. On April 30, 2018, PNR announced that it had completed the separation of its Water and Electrical businesses. Now the company's primary focus is on residential, commercial, industrial, municipal and infrastructure and agriculture applications. Its fiscal year 2021 revenues were US$3.8 billion and it employs approximately 11,250 people worldwide. History 1960s Pentair was founded in August 1966 as Pentair Industries, Inc., with the name derived from the Greek root word "penta-" (alluding to the company's five founders) and "air" (alluding to the company's original product), and went public several months later. The 5 founders were all formally employed by Litton Industries. Originally, they intended to manufacture high altitude research balloons, but they found sales to be less than expected. They acquired a local vacuum-forming business shortly thereafter and set about making canoes. This venture also met with less than expected sales. By 1968 the company was nearly bankrupt. Of the five original founders, one had passed away while three more had pulled out. The only remaining founder, Murray Harpole, brought in an outside investor, Ben Westby and they set about purchasing Peavey Paper Mills, Inc. The company was deeply in debt and badly managed, but the sale price was very inexpensive and Harpole believed that proper management would turn the company around in short order. 1970s The company continued to diversify but none of its other ventures proved as successful as the paper industry. It continued to expand in that area and acquired Niagara Paper in 1972. Miami Paper was purchased in 1974 and Flambeau Paper Corporation followed in 1978. The Peavey plant would be sold in 1976 because Pentair had outgrown it. While Westby departed in 1976, D. Eugene Nugent was brought in to expand the management team. 1980s In 1981, Pentair acquire Rockwell International's power hand tool factory from its Power Tool Division. Rockwell had purchased Porter-Cable in 1960 and merged it into the Power Tool Division but kept manufacturing in a separate facility. The Porter-Cable name had been retired in 1965 but Pentair had not licensed the Rockwell