Largest gathering of people filling out a sports tournament bracket simultaneously

According to Official Guinness Records,

The largest gathering of people filling out a sports tournament bracket simultaneously is 298, achieved by Bing (USA), at the Microsoft Offices in Bellevue, Washington, USA, on 15 March 2016. The participants, who were Microsoft employees, filled in online brackets to promote Bing's March Madness Bracket Builder website.

For a complete list of 2016 records, please visit 2016 Guinness Records in United States.

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