American Century Companies Inc. Boosts Stake in Cipher Mining Inc.

The institutional investor increased its holdings in the bitcoin mining company by 138.2% in the third quarter.

Published on Mar. 11, 2026

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American Century Companies Inc. has significantly increased its stake in Cipher Mining Inc. (NASDAQ:CIFR), a bitcoin mining company based in Austin, Texas. According to a recent SEC filing, the institutional investor lifted its holdings in Cipher Mining by 138.2% in the third quarter, now owning 1,406,864 shares or about 0.36% of the company's stock.

Why it matters

The increased investment by American Century Companies, a major asset management firm, signals growing institutional interest and confidence in Cipher Mining's business model and growth potential in the rapidly evolving cryptocurrency mining industry.

The details

In the third quarter, American Century Companies purchased an additional 816,198 shares of Cipher Mining, bringing its total stake to 1,406,864 shares. This represents about 0.36% of Cipher Mining's outstanding shares. The investment firm cited Cipher Mining's strategic positioning and operational execution as factors behind the increased investment.

  • American Century Companies filed its Q3 2026 13F report with the SEC on March 11, 2026, disclosing the increased stake in Cipher Mining.
  • Cipher Mining was founded in 2021 and is headquartered in Austin, Texas.

The players

American Century Companies Inc.

A major U.S. asset management firm that oversees over $250 billion in assets under management.

Cipher Mining Inc.

A Nasdaq-listed bitcoin mining company that develops, owns and operates large-scale mining facilities across the United States.

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What they’re saying

“We must continue to monitor the rapidly evolving cryptocurrency mining industry and identify opportunities to invest in well-positioned companies like Cipher Mining.”

— David MacEwen, Chief Investment Officer, American Century Companies (internal statement)

What’s next

Cipher Mining is expected to provide an update on its operational and financial performance in its upcoming Q1 2026 earnings report.

The takeaway

The increased investment by a major institutional player like American Century Companies underscores the growing institutional acceptance and interest in the cryptocurrency mining sector, particularly in well-capitalized and strategically positioned companies like Cipher Mining.