LTH LIFE TIME GROUP HOLDINGS INC Management Changes 8-K Filing 2023 - Retirement of President and COO Life Time Group Holdings, Inc. announced the retirement of Jeff Zwiefel, the President and Chief Operating Officer, effective December 31, 2023, and the company's agreement to provide consulting services to Mr. Zwiefel following his retirement.Get access to all SEC 8-K filings of the LIFE TIME GROUP HOLDINGS INC