Rocket Lab (RKLB) Stock After Hours: Insider Selling Weighs on Shares as U.S. Space Force Launch Looms Ahead of the Dec. 18 Market Open
Rocket Lab Corporation (NASDAQ: RKLB) ended the regular session on Wednesday, Dec. 17, 2025 lower, then ticked modestly higher after the closing bell as investors digested a fresh wave of insider-sale headlines and looked ahead to a tightly packed set of overnight and premarket catalysts. As of 7:22 p.m. ET (delayed quote), RKLB traded at $54.08 in after-hours action, up $0.12 (+0.22%), after closing at $53.96, down $1.53 (-2.76%) on the day. After-hours volume was reported at about 2.87 million shares. MarketWatch The setup for Thursday morning is unusual even by Rocket Lab’s standards: an overnight Electron launch window for