Equinox, the operator of Equinox Fitness Clubs, Blink Fitness, Pure Yoga, and SoulCycle, announced a significant minority stake in Rumble, a boxing-inspired group fitness company based in NYC.

Rumble opened its first location in January 2017 in New York City’s Flatiron/Chelsea area, and its second location in NoHo followed this past summer. Rumble’s 45 minute, 10 round, strength and conditioning class based on the science of boxing has quickly become one of the most popular group fitness workouts in the city. Like Equinox and SoulCycle, Rumble has become a must-go destination for top names including Justin Bieber, Selena Gomez, Kendall Jenner, Hailey Baldwin, Jason Derulo, David Beckham and Kevin Hart.

“We believe that Rumble is the ‘next big thing’ and that we are uniquely positioned to help shepherd and expedite its growth,” says Harvey Spevak, executive chairman and managing partner, Equinox.

Rumble Co-Founder and Chief Brand Officer Eugene Remm adds, “I always want to work with the gold standard and having Rumble backed by Equinox accomplishes this goal. I’ve known Harvey [Spevak] for over a decade, so I’m excited to work together and continue to learn and grow.”

“Hands down, Equinox and its portfolio of brands are the leaders in multiple categories across the fitness and luxury lifestyle spectrum, and we couldn’t be more thrilled to have them as a partner in Rumble,” says Andy Stenzler, co-founder and CEO of Rumble.

Rumble has previously announced upcoming locations on the Upper East Side of New York, West Hollywood in LA, San Francisco’s Financial District, Washington D.C and is now adding Philadelphia to its planned openings, with more to come.

Rumble was founded by Noah Neiman (former Barry’s Bootcamp Master Trainer, and cast member of BRAVO’s Work Out New York), Eugene Remm (Co-Founder EMM Group—Catch, Lexington Brass, Tenjune, SL), Anthony DiMarco (13 time IRONMAN, former Managing Director, Google) and Andy Stenzler (Co-Founder Cosí, Kidville).