American Securities, a private equity firm, completed the investment in United PF, the largest developer and operator of fitness clubs under the Planet Fitness brand. Financial terms were not disclosed. "In American Securities, we have found a partner with resources to support our vision, alignment in culture and values, and a long-term time horizon that promotes true partnership. We are excited to work with American Securities to continue developing our markets and bringing affordable fitness and the Judgement Free Zone® to more communities across the country." Trey Owen, United PF CEO.