Shares of Planet Fitness (PLNT) dܫropped 16%, to their lowest level in more than three ye🃏ars after the gym operator’s board unexpectedly fired CEO Chris Rondeau.

The company announced that board member Craig Benson has been chosen as interim CEO, effective immediately. It added that Rondeau would remain on the board and will be nominated for reelection at t🐟he 2024 annual meeting.

He is expected to serve in an advisory rolꦺe “to help ensure a smooth transition.” Planet Fitness noted it has brought in an executive search firm to find a permanent replacement, and both internal and external candidates will be con▨sidered.

Rondeau has worked at Planet Fitness for three decades and served as CEO sinc♕e 2013. It’s not clear why he was l𒆙et go. The company indicated that the change was “not the result of any material or unexpected financial events.”

“As we enter the next chapter of Planet Fitness’ journey, the Board felt that now was the right time to transition leadership," said Chair Stephen Spinelli, Jr.

Benson was the governor of New Hampshire from 2003 to 2005 and co-founded networking equipment maker Cabletron Systems 40 years ago. He has been on the Planet Fitness board since 2017.