Magnetar Financial Boosts NorthWestern Energy Stake by Over 2,000%

The hedge fund now owns nearly 200,000 shares of the utility company.

Mar. 11, 2026 at 10:50am

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Magnetar Financial LLC significantly increased its stake in NorthWestern Energy Group, Inc. (NYSE: NWE) during the third quarter, growing its holdings by 2,066.9% to 195,522 shares. The institutional investor now owns 0.32% of the utility company, worth $11.46 million as of its most recent SEC filing.

Why it matters

The large increase in Magnetar's NorthWestern Energy position suggests the hedge fund sees significant upside potential in the stock. As a major institutional investor, Magnetar's moves can influence market sentiment and potentially drive increased interest in the company's shares.

The details

According to the 13F filing, Magnetar added 186,499 shares of NorthWestern Energy in the third quarter, bringing its total position to 195,522 shares. The hedge fund now owns 0.32% of the company's outstanding stock. NorthWestern Energy is an electric and natural gas utility serving customers across Montana, South Dakota, and Nebraska.

  • Magnetar Financial increased its NorthWestern Energy stake in the third quarter of 2026.

The players

Magnetar Financial LLC

An institutional investment management firm that focuses on alternative investment strategies.

NorthWestern Energy Group, Inc.

A regulated energy utility company based in Sioux Falls, South Dakota that delivers electricity and natural gas to residential, commercial, and industrial customers.

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The takeaway

Magnetar's significant increase in its NorthWestern Energy position suggests the hedge fund sees strong growth potential in the utility company's stock. As a major institutional investor, Magnetar's moves can influence market sentiment and potentially drive increased interest in NorthWestern Energy shares.