CSGP vs PAG Comparison

CoStar Group is a global provider of proprietary information, analytics, and online marketplaces serving both commercial and residential real estate. The firm operates through a diverse portfolio of brands, including CoStar Suite for commercial real estate research, LoopNet for commercial listings, Apartments.com for multifamily rentals, and Homes.com for residential brokerage. It primarily sells high-margin software-as-a-service subscriptions that provide institutional clients with forensic property data and premium advertising visibility. With operations across North America, Europe, and Asia-Pacific, CoStar maintains the industry's most comprehensive centralized real estate database, functioning as a critical information utility for brokers, lenders, and owners worldwide.

Penske Automotive Group operates in 19 US states and overseas. It has about 150 US and Puerto Rico light-vehicle stores as well as 217 franchised dealerships overseas, primarily in the United Kingdom but also in Australia, Germany, Italy, and Japan. The company is the third-largest US publicly traded dealership in terms of light-vehicle revenue and sells more than 40 brands, with over 90% of retail automotive revenue coming from luxury and import names. Other segments are service and finance and insurance. The firm's Premier Truck Group owns 45 truck dealerships selling mostly Freightliner and Western Star brands, and Penske owns 15 used-vehicle stores, mostly in the US and UK under the CarShop (US) and Sytner Select (UK) brands. Penske is based in Bloomfield Hills, Michigan.