On Thursday, Google shareholders approved an unconventional stock split that will ensure that the company's co-founders remain in control. Here's an excerpt from an April letter from Google Inc. co-founders Larry Page and Sergey Brin explaining the reasoning behind its plan to issue a non-voting class of stock:

"In our experience, success is more likely if you concentrate on the long term. Technology products often require significant investment over many years to fulfill their potential. For example, it took over three years just to ship our first Android handset, and then another three years on top of that before the operating system truly reached critical mass. These kinds of investments are not for the faint-hearted.

"We have protected Google from outside pressures and the temptation to sacrifice future opportunities to meet short-term demands. Long-term product investments, like Chrome and YouTube, which now enjoy phenomenal usage, were made with a significant degree of independence.

"We have a structure that prevents outside parties from taking over or unduly influencing our management decisions. However, day-to-day dilution from routine equity-based employee compensation and other possible dilution, such as stock-based acquisitions, will likely undermine this dual-class structure and our aspirations for Google over the very long term. We have put our hearts into Google and hope to do so for many more years to come. So we want to ensure that our corporate structure can sustain these efforts and our desire to improve the world."