Rocket Lab (RKLB) Stock After Hours Today: Space Force STP-S30 Launch Sparks a Late Bid — What to Know Before the Market Opens Dec. 19, 2025
Rocket Lab Corporation (NASDAQ: RKLB) ended Thursday, December 18, 2025 in the spotlight — and the buying didn’t fully stop when the closing bell rang. After a powerful regular-session surge, RKLB closed at $59.92, up 11.05%, and then traded around the $60.7 area in late after-hours indications (roughly $60.74 around 7:59 p.m. ET in some feeds). StockAnalysis+1 The catalyst: Rocket Lab’s successful STP‑S30 mission for the U.S. Space Force, executed five months ahead of schedule — a headline that hit both space-industry credibility and “execution premium” narratives that often move the stock fast. GlobeNewswire+2ssc.spaceforce.mil+2 Below is what happened today, why