ARQQ ▼ -0.2% - Arqit Quantum Inc. $ARQQ ARQQW - Babcock and Arqit demonstrate secure communications network designed to counter future quantum-enabled threats Arqit Quantum shares declined 0.2% today following the company's announcement of a secure communications network demonstration conducted with Babcock, designed to address threats from quantum computing capabilities. The modest pullback suggests investors may have already priced in the partnership news or are awaiting additional commercial milestones beyond the proof-of-concept stage. 22-SEP-2026 09:00 AM ET