Dropbox on Feb. 23 announced plans to raise $500 million through an initial public offering (pdf), making the 11-year-old file-storage startup the first company in Y Combinator's portfolio to make a market debut. It's a big moment, and a potential inflection point, for the influential incubator. Y Combinator has a roster of big companies, including Stripe and Airbnb,...

Dropbox on Feb. 23 announced plans to raise $500 million through an initial public offering (pdf), making the 11-year-old file-storage startup the first company in Y Combinator's portfolio to make a market debut. It's a big moment, and a potential inflection point, for the influential incubator. Y Combinator has a roster of big companies, including Stripe and Airbnb,...