It was a tough year for many major corporations, but this neglected bouquet of Fortune 500 companies stood out for particularly poor performance. From a bankrupt airline to an aging camera maker, here are the biggest losers.

In a year when Europe's sovereign debt woes dominated headlines, it's no surprise that financial stocks took a beating.

** Steve Jobs, who transformed Apple Incorporated (AAPL) into the world’s largest technology company, submitted his resignation to the board of directors on Wednesday and according to reports, he “strongly recommended” that the board name Chief Operating Officer Tim Cook as his successor. Jobs will remain on the Board but in a limited capacity.

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MasTec, Inc. (NYSE:MTZ) announced the expiration of its offer to exchange its outstanding senior convertible notes ("Old Notes") for new notes that are substantially similar in all material terms, except the new notes will have an optional physical, cash or combination settlement feature and will contain certain conditional conversion features ("New Notes").