After-Hours Buzz: MSFT, DD & More

Check out which companies are making headlines after the bell Tuesday:

Microsoft - The tech giant announced plans to make its Surface device available at additional retailers as soon as mid-December. The company also announced the extension of its Microsoft holiday stores.

(Read More: Dow Logs 5-Day Rally, but 'Cliff' Woes Weigh)

DuPont - The chemical company announced a $1 billion share buyback program and updated its 2012 earnings guidance to the higher end of the previously-announced range of between $3.25 and $3.30 a share, excluding one-time items, versus expectations for $3.29 a share. The company also announced its current outlook for 2013 earnings to grow low to mid-single digits. Shares rose in extended-hours trading.

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.

(Read More: CNBC's Market Insider Blog)

—By CNBC's JeeYeon Park (Follow JeeYeon on Twitter: @JeeYeonParkCNBC)

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