• R&D spending in 2013: $8 billion
• As a percentage of revenue: 13.2%
Known for pursuing moonshot R&D projects, the Mountain View, Calif.-based Internet company has invested in seemingly outlandish technologies such as self-driving cars, computer eyewear and balloon-distributed Wi-Fi. The company employs about 18,600 people in research and development according to its latest annual report, and most of its R&D costs go into staffing and personnel support. According to Google's annual report, "our product development philosophy is to launch innovative products early and often, and then iterate rapidly to make those products even better."