AROC vs APLS Comparison

Archrock Inc is an energy infrastructure company focused on midstream natural gas compression. It is a provider of natural gas compression services, based on total compression fleet horsepower, to customers across the United States and a supplier of aftermarket services to customers that own compression equipment. The company operates through two segments: contract operations and aftermarket services. The contract operations segment includes designing, sourcing, owning, installing, operating, servicing, repairing, and maintaining its owned fleet of natural gas compression equipment, and generates the maximum revenue. The aftermarket services segment provides operations, maintenance, overhaul, and reconfiguration services, and sales of parts and components.

Apellis Pharmaceuticals Inc is a commercial-stage biopharmaceutical company focused on the discovery, development, and commercialization of novel therapeutic compounds to treat diseases with high unmet needs through the inhibition of the complement system, which is an integral component of the immune system, at the level of C3, the central protein in the complement cascade. Currently it has two marketed drugs that target C3, the central protein in the complement cascade: SYFOVRE (pegcetacoplan injection) and EMPAVELI (pegcetacoplan).