According to the whitepaper containing all of the answers to your questions that was linked for you in the post above yours, yes. They belong to the Chia Network.
The 21.000.000 XCH was farmed at the start of the project, in the genesis block.
It is the property of Chia Inc. (the company) and controlled by the board of directors.
Half is currently stored in the wallet for the US main office, the other half stored for the Singapore branch office.
For what they intend to do with it, read the white-paper linked above.