As of December 2025 Arqit Quantum has a market cap of โน37.77 Billion. This makes Arqit Quantum the world's 7459th 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 Dec 21st, 2025 the market cap of Arqit Quantum was reported to be: