Part of the philosophy behind Stockpickr.com is to allow regular investors to follow in the footsteps of other smart investors.This could mean a few different things. First, it could mean piggybacking great investors like Warren Buffett or George Soros. Other times it means buying what the CEOs, employees and directors of a company are buying. These are people who know the intimate details of their company far better than you or I do. The perfect setup is when one of these company insiders or an entire board (in the case of a buyback) are buying shares along with savvy, accomplished investors. That's why each Thursday at Stockpickr we update the Top 10 Insider Purchases and Buybacks portfolio, which features stocks that in the last week have experienced either big insider purchases or newly announced buybacks as well as super investors accumulating shares. Yum! Brands ( YUM) makes this week's list. The fast-food chain operator said it plans to repurchase $1.25 billion in common stock over the next 12 months. The new buyback is a step toward the company's goal to repurchase $4 billion over the next two years, potentially lowering the number of outstanding shares by as much as 20%. Only a mere $25 million remains under the $500 million buyback plan the company put forth in March, adding to the 12% reduction in outstanding shares it has achieved during the past three years.