Check out the companies making headlines after the bell : Zions — Shares slipped almost 3% after the regional bank reported net interest income in its first quarter of $662 million, coming in below the $674.5 million analysts polled by StreetAccount had anticipated. However, Zions’ earnings of $1.56 per share beat the consensus forecast of $1.42 per share, according to LSEG. Steel Dynamics — The steel producer added less than 1% after posting mixed first-quarter results. Revenue of $5.20 billion outpaced the $5.10 billion analysts surveyed by LSEG were expecting. However, Steel Dynamics reported earnings of $2.78 per share, a penny below the expected $2.79 per share. Shares had gained 4.5% earlier in the day. Amazon — The e-commerce giant popped 3% after the company agreed to invest up to $25 billion in Anthropic as part of an expanded agreement to build out AI infrastructure. This comes on top of the $8 billion Amazon has already invested in the artificial intelligence startup in recent years. In turn, Anthropic said in the Monday announcement that it’s committed to spending more than $100 billion on Amazon Web Services technologies over the next 10 years. Apple — The tech stock fell less than 1% in extended trading after announcing that Tim Cook will step down as CEO on Sept. 1. Cook will assume the role of executive chairman and will be replaced by John Ternus, an insider who served as senior vice president of hardware engineering. Alaska Air Group — The airline’s stock fell more than 1% after it pulled its 2026 forecast due to the uncertainty around fuel costs. In the first quarter, Alaska Air lost $1.68 per share, after adjustments, on revenue of $3.3 billion. Both numbers fell short of estimates. According to LSEG, analysts anticipated the airline would lose $1.35 per share on revenue of $3.31 billion. — CNBC’s Christina Cheddar Berk contributed reporting. Correction: An earlier version of this story misstated which company had made a previous $8 billion investment in Anthropic. It was Amazon.
Stocks making the biggest moves after hours: Amazon, Apple, Steel Dynamics and more
Apr 21, 2026
