SCHEDULE: Jane Street Discloses 5% Stake in Cipher Mining

Jane Street Group, LLC and its affiliates have reported a 5.0% beneficial ownership stake in Cipher Mining Inc., totaling 19,682,871 shares of common stock.

Summary

• Jane Street Group, LLC, along with its subsidiaries Jane Street Capital, LLC, Jane Street Options, LLC, and Jane Street Global Trading, LLC, reported beneficial ownership of Cipher Mining Inc. common stock.
• The aggregate amount beneficially owned by Jane Street Group, LLC is 19,682,871 shares.
• This represents 5.0% of the class of Cipher Mining Inc. common stock.
• Jane Street Group, LLC holds shared voting and shared dispositive power over all 19,682,871 shares.
• The event requiring this filing occurred on October 16, 2025.

Sentiment

Score: 6

Explanation: The disclosure of a significant institutional stake by Jane Street Group is generally viewed as a neutral to slightly positive signal, indicating institutional interest in Cipher Mining Inc. without implying any active management or control intent.

Positives

• The disclosure of a 5.0% beneficial ownership stake by a prominent institutional investor like Jane Street Group, LLC, may signal increased institutional interest and confidence in Cipher Mining Inc.'s future prospects.
• The passive nature of the investment, as indicated by the Schedule 13G filing, suggests a long-term holding strategy rather than an intent to influence control, which can be viewed favorably by existing shareholders.

Future Outlook

NA

Industry Context

Jane Street Group, a major quantitative trading firm, disclosing a significant stake in Cipher Mining Inc. reflects a broader trend of institutional investors increasing their exposure to the digital asset and cryptocurrency mining sectors. This indicates growing mainstream acceptance and investment in companies operating within the blockchain ecosystem.

Stakeholder Impact

• Shareholders may view the disclosure of a significant institutional investor stake as a positive indicator of market confidence and liquidity, potentially leading to increased trading interest.
• The passive nature of the investment suggests no immediate impact on company management or strategic direction.

Key Dates

Recommendation

The filing indicates a significant passive stake by a reputable institutional investor, Jane Street Group, LLC, which could be interpreted as a vote of confidence. However, without further financial or operational details from Cipher Mining Inc., a 'hold' recommendation is prudent, acknowledging the institutional interest while awaiting more comprehensive performance data.

Keywords

Cipher Mining, Jane Street Group, Institutional Ownership, SEC Filing, Schedule 13G, Common Stock, Beneficial Ownership, Blockchain, Cryptocurrency Mining