After-hours trading runs 4:00 PM – 8:00 PM ET.
CNM last traded at $40.68 after hours, up $0.07 (0.16%) from its regular-session close of $40.62.
📅 CNM reported earnings on Sep 9, 2026 before the open, with an estimated EPS of $0.92. CNM earnings details →
Core & Main (CNM) is trading at $40.68 after hours, up $0.07 (0.16%) from its regular-session close of $40.62.
CNM is up 0.16% in after-hours trading. Moves in this session almost always follow something released after the 4:00 PM ET close — an earnings report, guidance, a filing, or news — and trade on far thinner volume than the regular session, so the size of the move can overstate what the market will settle on at the next open.
After-hours trading in CNM on the NYSE runs from 4:00 PM to 8:00 PM ET on trading days, immediately after the regular session closes. Not every broker offers the full window, and liquidity thins sharply after about 6:30 PM ET.
CNM reported earnings on Sep 9, 2026 before the open, with an estimated EPS of $0.92. Earnings are the most common cause of a large after-hours move, since most companies report after the close.