As of September 2026 Arqit Quantum has a market cap of A$0.57 Billion. This makes Arqit Quantum the world's 7984th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Sep 21st, 2026 the market cap of Arqit Quantum was reported to be: