Equinox Fitness was founded in 1991 by the Errico family. In 2008, the company brought Pure Yoga from Hong Kong to the US. Pure Yoga operates separately from Equinox Fitness. Other subsidiaries include Equinox Fitness, Soul Cycle, Pure Yoga, Blink Fitness, and the Yorkville Club.
In 2016, the company announced that it was constructing 2 luxury hotels in New York and in Los Angeles. In August 2016, the billionaire owner of Equinox, Stephen Ross, hosted a fundraiser for Donald Trump, which caused many to cancel their membership.
Headquarters for Equinox Fitness are still located in New York, New York.