Kraft Foods (NYSE:KFT) shares moved up yesterday on news that billionaire investor Nelson Peltz took a 3 percent stake in the company. Shareholders and analysts had long been speculating that an activist investor could get involved with the company and force it to institute a massive share buyback, revive its first tier brands and sell or spin-off its second tier brands.

Nelson Peltz is well known for his past work with companies like Wendy's, whose shareholders experienced a more than 50% rise in value since his first involvement. Most of his larger prior deals have been in the restaurant and food business as well, adding to the probability that his Kraft involvement isn't simply putting money away for the kids!

So, what are his plans? Well, many analysts and investors expect the activist investor to first leverage up since it has debt amounting to less than two times EBITDA. Secondly, Peltz will likely demand that the company sell off its second tier brands in order to focus on reviving its best in class. These brands could include Post cereals and Maxwell House. And finally, he will likely boost spending in frozen foods and cheese in order to strengthen the company's two best product lines.

Combined, this is all good news for investors - but the timing couldn't have been worse for Peltz. The activist investor was not required to disclose his stake until it reached more than 5 percent of the company - this leak reportedly angered him. Now that investors know what he's likely up to, it may become much more expensive for him to purchase shares. Regardless, this is definitely a stock worth watching!

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