As of May 2026 Arqit Quantum has a market cap of โน19.20 Billion. This makes Arqit Quantum the world's 8662th 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 May 18th, 2026 the market cap of Arqit Quantum was reported to be: