 Revenue Up 53 Year-Over-Year 1.5:1 Product Book-to-Bill Ratio Total Cash Grows to 49.5 Million VAN NUYS, CA ACCESSWIRE April 12, 2021 Capstone Turbine Corporation NASDAQ:CPST Capstone or the Company, the worlds leading manufacturer of clean technology microturbine energy systems, announced today that its unaudited preliminary financial results for the fourth quarter ended March 31, 2021, indicate preliminary revenues of 17.8 million, up 53 from 11.6 million in the year-ago quarter, which marked the beginning of the global COVID-19 pandemic. On a preliminary basis, Capstones gross product book-to-bill ratio increased sequentially to 1.5:1, up from 0.9:1 in the prior quarter, primarily as a result of the general economic recovery as well as through the combined efforts of the Capstone Solutions Direct Sales organization. 