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 March 2022, Equinox had two lawsuits filed against them for unpaid rent.
Headquarters for Equinox Fitness are still located in New York, New York.