Space concept stocks retreated broadly during after-hours trading, with mainstream names posting losses across the board. As of press time, ASTS.US traded at $56.10 in the after-hours session, down $0.10 from its previous close of $56.20, representing a decline of 5.34%. The stock touched a high of $59.455 during regular trading hours but closed at $56.20, extending losses in after-hours trading.

RKLB.US showed even weaker performance in the after-hours session, trading at $63.51, down $0.40 from its regular session close of $63.91, marking a drop of 8.98%. The stock opened significantly lower from the previous close of $69.99 during regular hours, dipping to a low of $63.00 intraday, and continued to probe lower to $63.20 in after-hours trading before a slight rebound.

Among other names, RDW.US fell 6.57% to $8.69 in after-hours trading, while ASTX.US dropped 8.96% to $10.098, and RKLX.US declined 9.04% to $16.150. RKLZ.US bucked the trend with a 3.44% gain to $5.510, emerging as one of the few gainers in the sector. On the derivative ETF front, SPCX.US fell 4.14% to $113.37, SPCH.US dropped 5.77% to $6.456, while SSPC.US rose 3.76% to $21.300. Overall, the space sector showed cautious sentiment in after-hours trading following regular session volatility, with most stocks extending their intraday losses.