CBS Corp. overcame a slump in TV advertising to report higher sales and profit in the final quarter of 2017, relying on surging subscriber fees and sales of programs to others.

CBS boosted sales from licensing by 33 percent and subscription fees by 20 percent, according to a statement Thursday. The company said its two paid streaming services have almost 5 million subscribers.

Chief Executive Officer Leslie Moonves is trying to sustain momentum at the company he has led for a decade while his board explores a merger with Viacom Inc., which like CBS is controlled by the Redstone family. Viacom owns cable networks including MTV and Nickelodeon, as well as the Paramount Pictures studio.

Moonves opposed the deal in 2016 but has been urged to reconsider by Shari Redstone, who is vice chairman of both companies.

The owner of the most-watched U.S. TV network has been reducing its reliance on advertising in recent years, extracting higher fees from pay-TV providers and selling TV shows to streaming services. It has invested the money in its own online services.

Fourth-quarter earnings at CBS, excluding some items, rose to $1.15 a share, according to the statementbeating the $1.11 average of analysts’ estimates. Revenue rose 11 percent to $3.92 billion, compared with projections of $3.71 billion.

CBS rose as much as 3.5 percent to $58.70 in extended trading. The stock added 1.6 percent to 56.74 at the close in New York and is down 3.8 percent in 2018.

In the past few years, CBS has sold its radio and billboard businesses to focus on television, while repurchasing billions of dollars of its shares. The company also owns Simon & Schuster publishing.