Merck & Co., Inc. (MRK)
 NYSE: MRK · Real-Time Price · USD
 82.49
 -3.49 (-4.06%)
  At close: Nov 3, 2025, 4:00 PM EST
82.90
 +0.41 (0.50%)
  After-hours: Nov 3, 2025, 7:59 PM EST
Source: Business metrics provided by Main Street Data and sourced from official company press releases and documents.