Molycorp - The mining company appointed vice chairman Constantine Karayannopoulos as its interim president and CEO, replacing Mark Smith. Shares tumbled in extended-hours trading.
Aetna - The health insurer said it expects to earn $5.40 a share in 2013 and see revenue growth of approximately 9 percent. Shares rose in extended-hours trading.
Thor Industries - The maker of RVs declared a special dividend of $1.50 a share and also accelerated its regular quarterly dividend of 18 cents a share to December from next January.
Lazard - The financial service company declared a special dividend of 20 cents a share and accelerated its quarterly dividend to December from February.
Susquehanna - The financial services firm announced it is accelerating its dividend payout of 7 cents a share.
International Flavors & Fragrances - The flavor and fragrance maker declared a quarterly cash dividend for 34 cents a share in lieu of the regular cash dividend that would have been paid in January. In addition, the company announced a share repurchase program of $250 million.
So far, more than 220 companies with a market cap of at least $240 million have declared a special dividends or accelerated dividend payouts, ahead of next year's possible tax increase on dividends.
Moody's - The ratings agency increased its quarterly dividend by 25 percent to 20 cents a share from 16 cents a share.
Cummins - The heavy equipment company announced new $1 billion share buyback program. Shares edged higher in extended-hours trading.
Deckers Outdoor - The footwear maker was initiated with a "buy" rating and a price target of $50 at Janney Capital, sending shares higher in extended-hours trading.