After-hours trading runs 4:00 PM – 8:00 PM ET.
KOP last traded at $46.37 after hours, up $0.01 (0.03%) from its regular-session close of $46.35.
📅 KOP is expected to report earnings around Nov 6, 2026 before the open (estimated), with an estimated EPS of $1.32. KOP earnings details →
Koppers (KOP) is trading at $46.37 after hours, up $0.01 (0.03%) from its regular-session close of $46.35.
KOP is up 0.03% 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 KOP 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.
KOP is expected to report earnings around Nov 6, 2026 before the open (estimated), with an estimated EPS of $1.32. Earnings are the most common cause of a large after-hours move, since most companies report after the close.