The giants of advertising.

Posted on June 20, 2013

1. Procter & Gamble Co: $4.9 billion P&G spent a staggering almost $2 billion on TV ads alone. It is the planet's biggest advertiser, and spends $10 billion on ads globally every year.

2. General Motors Co: $3.1 billion GM cut its $10 million Facebook ad budget right before the social media company's first public stock offering earlier this year. 

3. Verizon Communications: $2.52 billion Verizon spent almost half of its budget on television campaigns.

4. Comcast Corp: $2.47 billion Comcast became the largest U.S. media company after it acquired NBC Universal in 2011. It spent a large amount of its budget on movie ads and the Xfinity brand.

5. AT&T: $2.36 billion Most companies on our list increased their ad budgets last year, but AT&T decreased its budget by 21 percent.