It's not a company that sells tech to other companies or consumers.
Read this article about Decentralized Autonomous Organization or DAO for short https://ethereum.org/en/dao/
Next is read about Ethereum mining under POW https://ethereum.org/en/developers/docs/consensus-mechanisms/pow/mining/
and then Ethereum 2.0's staking https://ethereum.org/en/eth2/staking/

Ethereum organization started a public fundraising before in case you're wondering where they got their money to start this project.