As of December 2025 NTT (Nippon Telegraph & Telephone) has a market cap of NZ$141.63 Billion. This makes NTT (Nippon Telegraph & Telephone) the world's 266th 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.