Airbnb (NASDAQ: ABNB) has disrupted the travel sector by making an industry out of home-sharing, and the company dominates that segment of the travel industry with an estimated 74% market share. Airbnb, after all, is a verb and noun, and it's come to mean any type of home-share, even if it's not an Airbnb listing. In its most recent quarter, revenue jumped 29% to $2.9 billion, and GAAP net income soared 46% to $1.2 billion as margins benefited from the seasonal peak of the travel season.