10 Worst-Managed Companies of 2010

TheStreet.com has its least favorite companies listed on its site. It has two new additions and many returning losers. New to its list of the most egregiously poor performers is Yahoo. Both Yang and Bartz are dissed equally. Then there's Boeing—making the F grade for the so far seemingly endless delays in launching the 787 Nightm.., er, Dreamliner.

Rounding out the list are Time Warner, Jamba Juice, and Sirius XM, plus 5 more. And just for fun, writer Scott Rothbort beats some dead horses like Circuit City and Six Flags. See the full list here. (More Yahoo stories.)