The Firm represented GridTek Utility Services and First Reserve in the completed sale of GridTek by First Reserve. The financial terms of the transaction were not disclosed.~~GridTek Utility Services is a leading provider of electrical transmission and distribution maintenance services engaged in the maintenance of electrical infrastructure for the utility industry and industrial customers.~~First Reserve is a leading global private equity firm investing across diversified energy, utility, and industrial end-markets. Founded in 1983, First Reserve has more than 40 years of industry insight and has cultivated a differentiated network of global relationships. The firm has raised over $34 billion of aggregate capital and has developed operational expertise built from over 750 transactions, including platform investments and add-on acquisitions.~~The Simpson Thacher team includes Michael T. Holick, Felicity Bell, Jacob Kornman and Luca Tomasi (M&A); Larry Moss, Alisa Tschorke and Yifan Cao (Employee Benefits and Executive Compensation); Andrew Purcell and Edward Grais (Tax); Eli Isak and Anita Wu (Banking and Credit); Lori Lesser, Kate Mirino and Celeste Fleetwood (Intellectual Property); and Dennis Loiacono (Real Estate).