It's been a rough year for those in the branding business at big corporations. SEC investigations, massive product recalls and oil spills (among more traditional factors like competition and slowing sales) have taken a toll on the reputations, as well as the stock prices, of some of America's most well-known companies.

Using data from the two largest brand-valuations firms as a reference, 24/7 Wall St. chose 10 big-name brands operating in the U.S. that have lost substantial chunks of their brand valuations in the first half of this year. They then mixed in a whole host of other criteria, and ended up with a list of "The 10 Biggest Brand Disasters of 2010" -- those on the list have lost well over $100 billion in brand value since Jan. 1.

Which companies made the painful cut? Click here to see the full report on AOL’s DailyFinance.com.