The largest U.S. cable operator and the No. 1 U.S. high-speed Internet provider said on Wednesday it also raised its annual dividend by 10 percent to $1.10 per share and earmarked $5 billion in stock buybacks for 2016 as part of a $10 billion program.

Shares of Comcast were up 2.4 percent to $55.88 in morning trading.

Total revenue at Philadelphia-based Comcast rose 8.5 percent to $19.25 billion in the fourth quarter, surpassing analysts' expectations of $18.76 billion, according to Thomson Reuters I/B/E/S.

Net income attributable to the company rose 2.4 percent to $2 billion, or 79 cents per share, from a year earlier. Excluding items such as gains on sales and acquisition-related items, profit rose 5.2 percent to 81 cents per share, a penny below estimates.

The company added 89,000 video subscribers, the most in any quarter in eight years. A year earlier it picked up about 6,000 new subscribers.

Cable and satellite-TV operators are battling streaming video services like Netflix Inc and Hulu for subscribers, as viewers are increasingly moving away from pay-TV toward online video offerings.

Comcast has been investing in improving customer service, enhancing features on its set-top boxes and rolled out smaller bundles in a bid to retain and add subscribers.

Wall Street has been keeping an eye on whether Comcast may enter the wireless market.

The U.S. Federal Communications Commission will hold the broadcast TV spectrum incentive auction, an effort buy back wireless airwaves from broadcasters and sell them to the wireless industry and other players.

Comcast would participate in the auction, starting in late March, and buy airwaves "if the price is right," executives said on an earnings conference call. The spectrum would be valuable in helping potentially build out infrastructure to offer wireless services to customers.

The company's business services unit posted $1.3 billion in revenue, up 19 percent from a year ago. Revenue from Comcast's high-speed Internet business grew about 10 percent to $3.2 billion, and Internet customer additions rose 23 percent to 460,000 - the highest in nine years.

At NBCUniversal, revenue jumped 13 percent to $7.5 billion, with film studio revenue climbing 26 percent to $1.63 billion.

Revenue at Universal theme parks, including Universal Studios Japan, soared 39 percent to $1.02 billion, propelled by the huge popularity of Harry Potter attractions.

(Editing by Jeffrey Benkoe)

By Malathi Nayak