Check out which companies are making headlines after the bell Monday:
Boeing - The aerospace and defense company boosted its quarterly dividend by 10 percent to 48.5 cents a share and resumed its $3.6 billion share buyback program. Shares were largely unchanged in extended-hours trading.
(Read More: Stocks End Near Highs on 'Cliff' Optimism)
Widely-followed bank analyst Meredith Whitney upgraded the financial sector, saying "the banks right now are more than adequately capitalized." In particular, Whitney upgraded Citigroup, Bank of America and Discover Financial.
Diamond Foods - The packaged foods company posted earnings of 24 cents a share, topping expectations by a penny a share. Meanwhile, the company posted revenue of $259 million, missing estimates for $274 million. Still, shares rose in extended-hours trading.
Allstate - The insurance company approved a $1 billion share buyback program. Shares rose in extended-hours trading.
Eli Lilly - The pharmaceutical company authorized a new $1.5 billion share repurchase program, sending shares higher in extended-hours trading.
- The commercial real estate financial company declared a special dividend for 2012 of 5 cents a share.
Vitamin Shoppe - The nutritional supplements retailer said it will acquire Super Supplements in a deal worth nearly $50 million.
- The real estate investment trust declared a fourth-quarter dividend of 55 cents a share, sending shares higher in extended-hours trading.