Fortinet Shares Drop 25.5% After-Hours Despite Reported Q3 Beat

Fortinet shares fell 25.51% to $129.68 in after-hours trading on October 28, 2026, following third-quarter earnings that Investing.com reported as beating estimates. The stock had already fallen 5.79% in the regular session. Thin after-hours trading, meaning few buyers and sellers, can exaggerate moves, so the next regular session will show where the price settles.