[2] The company is headquartered north of Denver, Colorado with additional offices worldwide, including Belfast, London, New York, Salt Lake City, San Francisco, Singapore, Sydney, and Tokyo.

SpotX was founded as a division of the search engine marketing technologies and services company, Booyah Networks.

[3][4] In March 2007, SpotX, initially SpotXchange, formed a separate company from Booyah that focused on digital video advertising technology.

In 2020, SpotX made a strategic investment in SpringServe, a supply-side ad server for CTV.

[3][6] In 2021, SpotX was acquired by Magnite, Inc., the world's largest independent sell-side advertising platform, for $1.17 billion.