Planet Fitness Inc. (NYSE: PLNT) shares surged more than 10% in intra-day trading on Thursday after the gym operator delivered better-than-expected third-quarter results and raised its full-year growth outlook. The company reported adjusted earnings of $0.80 per share, beating consensus estimates of$0.73. Revenue increased 13% year over year to $330.3 million, above expectations of$323.47 million. System-wide same-store sales rose 6.9% from the prior year. Planet Fitness opened 35 new locations in the qua ...