DST Systems [DST] is no longer included in analysis because the company completed the merger with SS&C Technologies [SSNC], ProPetro Holding [PUMP] has been added to the service.
ProPetro is a growth-oriented, Midland, Texas-based oilfield services company providing hydraulic fracturing and other complementary services to leading upstream oil and gas companies engaged in the exploration and production, or E&P, of North American unconventional oil and natural gas resources.
On April 16, 2018, DST Systems was acquired by SS&C Technologies. SS&C is a global provider of investment and financial software-enabled services and software for the global financial services industry. Founded in 1986, SS&C is headquartered in Windsor, Connecticut and has offices around the world.