Super Bowl Ad Tracker: Everything You Need to Know About 2015's Big Game

Welcome to Adweek's 2015 Super Bowl Ad Tracker, a frequently updated roster of the brands and agencies taking part in the year's biggest advertising event.

Leading up to the Big Game on Feb. 1 in Glendale, Ariz., we'll update this post with everything we know about this year's advertisers. Since a 30-second spot will reportedly cost $4.5 million during the game, we'll also look at how brands are making the most of their spots with digital and social campaigns.

Squarespace: This is the third company that provides website development tools to marketers to reveal an ad for this year's game. And this is the second year Squarespace will run an ad. Last year, the brand developed the ad in house but is working with Wieden + Kennedy New York for the 2015 spot.