Shares of Quantum Computing Inc. (QUBT) tumbled 5.13% in after-hours trading on Friday, despite the company reporting better-than-expected first-quarter earnings earlier in the day. The stock's decline comes as a surprise following a significant intraday rally, where shares surged by over 30% during regular trading hours.

Quantum Computing, an integrated photonics and quantum optics technology company, posted adjusted earnings per share of $0.11 for Q1 2025, surpassing analyst estimates of -$0.05. The company's revenue for the quarter came in at $39,000, showing a 44% year-over-year increase from $27,000 in Q1 2024. However, this figure fell short of the consensus estimate of $300,000.

The company's after-hours decline suggests that investors may be reassessing the stock's valuation following its substantial intraday gains. Despite the positive earnings surprise, concerns about the revenue miss and the sustainability of the company's growth trajectory may be contributing to the sell-off. Additionally, the volatile nature of small-cap stocks in the quantum computing sector could be amplifying the stock's movements.