As of December 2025 Spero Therapeutics has a market cap of โฌ0.10 Billion. This makes Spero Therapeutics the world's 9017th 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 6th, 2025 the market cap of Spero Therapeutics was reported to be: