Who runs Uniswap?

Could you please clarify who exactly operates and manages the Uniswap platform? Is it a centralized organization with a clear hierarchy, or is it a decentralized protocol run by a community of developers and users? If it's the latter, how do decisions regarding the platform's future and development get made? Additionally, are there any key individuals or teams that play a particularly significant role in shaping the direction of Uniswap? Thank you for your time.