Cipher Mining Inc. (CIFR) Form 8-K Update

Filed November 4, 2025. This 8-K furnishes illustrative financial information regarding the ongoing development of the Barber Lake Facility.

• Material Event: Provides financial context for the 244 MW HPC data center project previously disclosed on September 25, 2025.
• Facility: Located near Colorado City, Texas, developed via subsidiary Cipher Barber Lake LLC and Fluidstack USA II Inc.
• Key Attachment: Exhibit 99.1 contains the illustrative financial data.

This filing is primarily informational, furnishing data r