Nilsine Partners Reduces Stake in Atmos Energy

Utility company's largest shareholder trims position by 4.3% in Q4 2025

Apr. 1, 2026 at 11:10am

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Nilsine Partners LLC, the largest institutional shareholder of Atmos Energy Corporation (NYSE: ATO), reduced its stake in the natural gas utility company by 4.3% in the fourth quarter of 2025, according to a recent SEC filing. Nilsine Partners now owns approximately 501,176 shares of Atmos Energy, or about 0.31% of the company's outstanding stock.

Why it matters

As Atmos Energy's largest investor, Nilsine Partners' trading activity can signal broader market sentiment around the utility's performance and future prospects. The reduction in stake, while relatively small, may indicate some institutional investors are taking a more cautious view of Atmos Energy's growth potential in the near term.

The details

According to the 13F filing, Nilsine Partners sold 22,585 shares of Atmos Energy during the fourth quarter, bringing its total position down to 501,176 shares. The firm's holding in Atmos Energy now makes up 7.3% of its overall portfolio, down slightly from the previous quarter. Atmos Energy's stock price has risen steadily over the past year, up nearly 10% as of the end of Q4 2025.

  • Nilsine Partners filed its 13F report for Q4 2025 on April 1, 2026.
  • The firm reduced its Atmos Energy stake during the three-month period ending December 31, 2025.

The players

Nilsine Partners LLC

An institutional investment firm that is the largest shareholder of Atmos Energy Corporation.

Atmos Energy Corporation

A U.S.-based natural gas utility company that focuses on regulated distribution of natural gas to residential, commercial, industrial and electric generation customers.

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The takeaway

Nilsine Partners' modest reduction in its Atmos Energy stake suggests some institutional investors may be taking a more cautious view of the utility's growth prospects, even as the stock has continued to perform well. However, Atmos Energy remains Nilsine's largest holding, indicating the firm still sees long-term value in the company.