Senator Elizabeth Warren and Representatives Alexandria Ocasio-Cortez and Mark Pocan sent letters to five private equity firms asking for information about their stakes in prison services companies. The Democrats also want to know how much revenue the companies generated, the profit they produced, the total number of employees as well what other PE firms own stakes. Letters were sent to BlueMountain Capital Management, H.I.G. Capital, American Securities, Apax Partners, and Platinum Equity. See a copy of the letter here.