Founded in 1986 and based in St. Louis, I'm North America's largest pharmacy benefit management company, managing about one out of every three in the U.S. I serve millions of patients, through employers, health plans, unions and government health programs. Priceline Group (Nasdaq: PCLN) is firing on all cylinders, and Wall Street analysts have a broadly bullish opinion about its prospects -and unlike many such companies, its stock is attractively priced. Priceline operates mostly under the agency business model, allowing hotels and other service providers to list their own offers, paying the company a commission for every transaction. The company spreads its fixed costs over a rapidly growing revenue base as it expands over time, and this business model produces big fat net profit margins above 25 percent. Priceline's fans like its strong Booking.com hotel booking business (featuring more than 525,000 hotels in 205 countries), its purchase of online restaurant reservation platform OpenTable, and the fact that it's growing its market share globally.