Last year, US companies spent more money than ever on ads designed to grab consumers' attention.

According to the 2019 Ad Age Leading National Advertisers report, the top 200 advertisers collectively spent a record $163 billion on advertising in 2018.

Some of the biggest ad spending increases came from internet-based giants like Amazon (32%), Google (23%), and Facebook (236%).

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Companies are constantly vying for consumers' attention, and they're spending more than ever to get it.

Collectively, the top 200 advertisers in the US spent a record $163 billion on advertising in 2018, up 3.6% year on year, according to Ad Age's annual Leading National Advertisers report. That growth is coming solely from internet ads — radio, print, and TV ad spending has been steadily decreasing since 2012 — which make up 53% of ad spending.

Some of the biggest spenders are internet-based companies. Facebook increased its ad spending by 236%, well beyond any other company, to $475 million. But despite the major increase, Facebook was only ranked No. 100 in top ad spenders. Other digital companies increased their ad spending as well, like Amazon (32%), Netflix (70%), and Google's parent company, Alphabet (23%).

The biggest ad spender, however, was media giant Comcast, with $6.12 billion spent in 2018.

Overall, there were 45 marketers that spent more than $1 billion on advertising in the US last year. Here are the top 10 biggest spenders.

Lara O'Reilly contributed to an earlier version of this post.