Magnetar Financial Boosts Stake in Liberty Broadband

Investment firm increases holdings in broadband provider by 2.4% in third quarter

Published on Mar. 11, 2026

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Magnetar Financial LLC, an investment management firm, increased its stake in Liberty Broadband Corporation (NASDAQ:LBRDK) by 2.4% during the third quarter of 2025, according to a recent SEC filing. Magnetar now owns 731,342 shares of the broadband company, making it the 25th largest holding in the firm's portfolio.

Why it matters

Liberty Broadband is one of the largest cable and broadband providers in the U.S., and institutional investors like Magnetar closely monitor the company's performance and ownership structure. This increase in Magnetar's stake suggests the firm sees continued growth potential in Liberty Broadband's business.

The details

According to the 13F filing, Magnetar Financial acquired an additional 17,372 shares of Liberty Broadband during the third quarter, bringing its total ownership to 0.51% of the company's outstanding stock. Liberty Broadband is Magnetar's 25th largest holding, valued at $46.5 million as of the most recent filing.

  • Magnetar Financial increased its Liberty Broadband stake during the third quarter of 2025.
  • The 13F filing detailing the increased ownership was submitted on March 11, 2026.

The players

Magnetar Financial LLC

An investment management firm that focuses on a variety of alternative investment strategies.

Liberty Broadband Corporation

A publicly traded holding company that invests in broadband and cable businesses, with a substantial equity stake in Charter Communications.

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The takeaway

Magnetar's increased stake in Liberty Broadband suggests the investment firm sees continued growth potential in the broadband provider, which is one of the largest in the U.S. market. This move highlights the close attention institutional investors pay to major players in the cable and internet service industry.