Arqit Quantum is trading at $14.28, down 10.19%, with its preliminary fiscal 2026 revenue estimate cited as the clearest company-specific explanation for the decline.
- Preliminary results were announced October 8, not newly reported October 16. Second-half revenue is expected at $355,000–$380,000, down from $463,000 a year earlier, after revenue recognition ended under a material Middle East customer contract.
- Software shares are also under pressure amid AI-infrastructure financing concerns; the software ETF is down 4.65% and the Nasdaq is down 2.14%.