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It has been shown that investors who simply copied Warren Buffett's investments would have earned an average 24.6% annually for 30 years through 2006. Unbelievably, this return was achievable even after Buffett had disclosed them in regulatory filings.

With the recent announcement that the Oracle of Omaha would buy Burlington Northern (NYSE:BNI) at a price of $100 per share -- a 30% premium to the stock's prior day close -- investors would have been well-served by following Buffett into the railroad when he first began purchasing it in 2007.

So where else might investors profit from public knowledge of Buffett's dealings? The superinvestor (and financier George Soros) recently disclosed substantially increased position in Wal-Mart Stores (NYSE:WMT), which I discussed here. Buffett has long prized the "can't lose" business known for its rabid focus on cost.

But what else is on Buffett's menu (besides hamburgers and cherry Coke)?

Earlier this year he picked up shares in Wells Fargo (NYSE:WFC), which he called an "all-in" bet when it was trading at roughly $9 per share. Recently, Buffett has also initiated new stakes in ExxonMobil (NYSE:XOM), Republic Services (NYSE:RSG), a solid waste disposer, and Becton Dickinson (NYSE:BDX).

Buffett also recently upped his stakes in Johnson & Johnson (NYSE:JNJ).

So which company do you think Warren Buffett will be investing in next and why? Leave your comment below in fewer than 250 words for a chance to win a one-year digital subscription to Motley Fool Inside Value (a $199 retail value). Our editorial team will select the best comment.

This contest will be open until 8:00 p.m. EST on Dec. 17, and you can view the rest of the contest rules here.

If you'd like the chance for a free annual subscription to Motley Fool Inside Value, simply leave a comment below with your prediction for Buffett's next purchase.

Fool contributor Jim Royal owns no position in any of the companies mentioned. Wal-Mart Stores is a Motley Fool Inside Value selection. Johnson & Johnson and Republic Services are Motley Fool Income Investor picks. The Fool's disclosure policy beat Buffett to the punch, and is now suffering the after-effects.