The Flow blockchain is owned and maintained by Dapper Labs, a technology company based in Vancouver, Canada. Dapper Labs is known for developing and deploying decentralized applications (dApps) and non-fungible tokens (#NFTs) on the Flow blockchain. They are also the creators of popular projects such as CryptoKitties and NBA Top Shot.
Dapper Labs is the primary entity responsible for the ownership and development of the Flow blockchain. However, please note that ownership structures can change over time, so it’s advisable to verify this information with up-to-date sources.