UnitedHealth Group (UNH) Stock After the Bell on Dec. 11, 2025 – And What to Watch Before the Dec. 12 Open
UnitedHealth Group shares closed Thursday at $336.50, up about 2.5% on volume near 7 million, as the Dow hit a record high. After-hours trading was quiet, with the stock near $336.70. UNH’s market cap stands at roughly $305 billion, still well below its 2025 peak near $600. Options activity surged, with contracts traded at about double the average share volume.