Merck (MRK) stock slips at the close, then steadies after hours as year-end trading thins
NEW YORK, December 30, 2025, 19:42 ET — After-hours Merck & Company, Inc. (MRK) shares fell 0.53% to $106.06 at the close on Tuesday and were up about 0.1% in after-hours trading at $106.17. The stock has traded between $73.31