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After-hours buzz: MET, YUM, XOM & more

Yum Brands' KFC and Taco Bell
Adam Jeffery | CNBC
Yum Brands' KFC and Taco Bell

Check out the companies making headlines after the bell Tuesday.

MetLife's stock was boosted after the bell Tuesday when it announced it plans to separate its U.S. life insurance unit — the largest in the country. That new spin-off would represent about 20 percent of MetLife's operating earnings as of September 30, 2015, the company said.

Shares of Yum Brands also ticked up after hours when the corporation behind Pizza Hut and Taco Bell announced a sales increase in its China division. December same-store sales — a closely followed metric in the industry— grew an estimated 1 percent year-over-year in China, the company announced Tuesday. The growth stemmed in part from a 5 percent same-store-sales increase for China's KFC locations. Sales declined for Pizza Huts in the region in December, the company said.

LendingTree shares were also on the rise in extended-hours trading when it announced it expected to exceed its prior earnings guidance for fourth quarter and full-year 2015. The online loan marketplace now expects 2015 revenue of $252.5 million to $253.5 million, representing growth of 51 percent, year-over-year, and an increase from previous guidance of $244 million to $247 million.

Drugmaker Shire PLC saw a moderate fall in stock price after the bell Tuesday, after successfully reaching a long-awaited agreement to acquire rival Baxalta. The two agreed to a $32 billion cash and stock offer, and combined, will be one of the top pharmaceutical companies charged with developing treatments for rare diseases, Reuters reported.

Shares of energy-related companies like The Williams Companies and Exxon Mobile also slid slightly in after-hours trading, albeit with light volume, after U.S. crude West Texas Intermediate (WTI) fell as low as $29.93, the weakest price since December 2003. Shares of Williams Companies were also downgraded by Fitch Ratings Monday.

— CNBC's Everett Rosenfeld and Reuters contributed to this report.