Bloomberg Media; Charles Sykes/Invision/AP

340 million: Homes Bloomberg TV is in globally, which will increase as Bloomberg and Smith expand international market share, with media watchers speculating they will target audiences in Eastern Europe, Africa and Asia.

Why they matter: In July, Bloomberg's luring of Smith, 44, from his former post as Atlantic Media Group president was considered a major coup. The exec, who has a reputation as an aggressive digital innovator, was widely credited with righting the ship at Atlantic, which became profitable in 2010 after operating in the red for years. Among his key initiatives was the creation of groups combining business and editorial staff with the goal of coming up with new ideas, spawning The Atlantic Wire and Atlantic Cities websites.

Proudest accomplishment this year: In March, Smith unveiled a six- pronged strategy he says will ensure Bloomberg remains the premiere news source for the world's most influential people. "Getting two thumbs up from Mike Bloomberg and our CEO Dan Doctoroff" on the plan was a milestone, says Smith.

Goal for next year: Launching online destinations beyond Bloomberg.com and Businessweek.com and investing in digital video. Smith and his team will "tap into the entrepreneurial spirit that built Bloomberg LP," based on the "owner's insistence on long-term perspective," Smith has said of Bloomberg, a New Yorker who counts as family partner Diana Taylor and daughters Emma, who recently left her post as head of the anti-poverty nonprofit Robin Hood Foundation, and equestrian Georgina, who just gave birth to son Jasper.

Nemesis: "Digital media start-ups chasing big dreams without fear of failure" as sources of the next big idea, says Smith.

Off-hour: The father of two splits his time between New York and Washington, D.C., and enjoys taking his daughter, Esme, 11, and son, Auden, 7, to local animal shelters to play with dogs and cats, all while "resisting adopting another."