Cipher Digital Inc (NASDAQ:CIFR) plans to raise $810 million through a private offering of senior secured notes due 2031, issued by a subsidiary, to back its data center operations. The notes will be offered by Stingray Compute LLC, a wholly owned subsidiary of Cipher, to qualified institutional buyers under Rule 144A and to investors outside the United States under Regulation S of the Securities Act, the New York-based company said.