CoinDesk also had an article on this:
Television personality and green mining advocate O’Leary is a strategic investor in Bitzero, along with Dubai-based Phoenix Group, a bitcoin mining rig supplier and venture capital firm.
Kevin O’Leary-Backed Bitcoin Miner to Locate HQ in North Dakota https://www.coindesk.com/business/2022/06/02/kevin-oleary-backed-bitcoin-miner-to-locate-hq-in-north-dakota https://archive.ph/6CG6l <-- An archive of the article, which can be easier to read