Cipher Mining Stock Soars 7% After-Hours On Phase 1 Completion Of Mega Mining Data Center

Cipher Mining (NASDAQ:CIFR) shares surged over 7% in after-hours trading, extending an 11.75% regular session gain, following the completion of Phase I of its Black Pearl data center. This milestone adds 10.1 EH/s of self-mining hashrate, boosting the company's total operating hashrate to 23.6 EH/s, and complements their September production of 251 BTC. The operational expansion highlights Cipher's growth in Bitcoin mining and high-performance computing, contributing to its stock's nearly 280% year-to-date rally.

Analysis

Cipher Mining, Inc. (NASDAQ:CIFR) shares soared in Wednesday's after-hours trading as the Bitcoin (CRYPTO: BTC) mining firm confirmed the completion of the first phase of its ambitious Black Pearl data center. CIFR is poised for a potential breakout. See what is driving the movement here. CIFR Stock Soars After Operational Milestones The stock jumped over 7% after the market’s close, extending its double-digit rally from the regular trading session. Cipher confirmed that Phase I of its Black Pearl facility in Texas is complete, delivering 10.1 exahashes per second of self-mining hashrate. The company achieved an operating hashrate of 23.6 EH/s. See Also: Bitcoin (BTC) Price Predictions: 2025, 2026, 2030 Additionally, it reported mining approximately 251 BTC in September, including 19 BTC produced through joint-venture data centers. Cipher, having a market capitalization of $6.89 billion, builds and operates industrial-scale data centers for BTC mining and high-performance computing activities. Price Action: At the time of writing, BTC was exchanging hands at $122,038.50, up 0.33% in the last 24 hours, according to data from Benzinga Pro. Shares of Cipher rallied 7.16% in after-hours trading after closing 11.75% higher at $17.60 during Wednesday’s regular trading session. The stock has skyrocketed nearly 280% in 2025. CIFR demonstrated a very high Momentum score as of this writing. Want to know how it compares to larger Bitcoin mining companies such as MARA Holdings Inc. (NASDAQ:MARA)? Visit Benzinga Edge Stock Rankings. Read Next: Photo courtesy: Shutterstock © 2025 Benzinga.com. Benzinga does not provide investment advice. All rights reserved. Cipher Mining (NASDAQ:CIFR) shares surged significantly, gaining 11.75% during regular trading and an additional 7.16% after-hours, following the announcement of its Black Pearl data center's Phase I completion. This operational milestone appears to be a primary driver for the stock, which has already seen a nearly 280% increase in 2025, coupled with a high momentum score. Phase I completion adds 10.1 exahashes per second (EH/s) to Cipher's self-mining hashrate, bringing the total operating hashrate to 23.6 EH/s. This expansion directly enhances the company's Bitcoin mining capacity, evidenced by its September production of 251 BTC, including 19 BTC from joint ventures. With a market capitalization of $6.89 billion, Cipher specializes in industrial-scale data centers for Bitcoin mining and high-performance computing, aligning its growth with digital asset infrastructure. The robust stock rally and extremely positive sentiment reflect strong investor confidence in its expansion strategy within the crypto mining sector.

Key Decisions for Investors

• Investors should assess the direct impact of Cipher Mining's increased operating hashrate and Bitcoin production capacity on future revenue projections and market share within the competitive crypto mining sector.
• Given the significant year-to-date share appreciation and high momentum, investors should evaluate current valuation metrics against peers and consider potential volatility inherent in growth-oriented crypto-related stocks.
• Monitor the company's continued execution on subsequent Black Pearl phases and broader Bitcoin price stability, as these are critical drivers for Cipher's sustained performance and profitability.