Assenagon Asset Management Reduces NiSource Stake

Institutional investor cuts holdings in utility company by 72.8% in Q4 2025

Mar. 27, 2026 at 7:22am

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Assenagon Asset Management S.A., an institutional investor, reduced its stake in NiSource, Inc. (NYSE: NI) by 72.8% in the fourth quarter of 2025, according to a recent 13F filing with the Securities and Exchange Commission. The firm now owns 506,363 shares of the utilities provider's stock, down from 1,864,138 shares previously.

Why it matters

This significant reduction in Assenagon's NiSource holdings suggests a shift in the institutional investor's outlook on the utility company. Changes in major shareholder positions can provide insights into market sentiment and potential future performance of a stock.

The details

According to the 13F filing, Assenagon Asset Management S.A. sold 1,357,775 shares of NiSource stock during the fourth quarter of 2025. The firm now owns 0.11% of NiSource's outstanding shares, valued at $21.1 million as of the end of the quarter.

  • Assenagon Asset Management reduced its NiSource stake in Q4 2025.

The players

Assenagon Asset Management S.A.

An institutional investor that manages assets for clients.

NiSource, Inc.

A publicly traded energy holding company that owns and operates regulated local gas and electric utilities in the United States.

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The takeaway

The significant reduction in Assenagon's NiSource holdings suggests the institutional investor may have a more cautious outlook on the utility company's future performance. Investors should monitor any further changes in major shareholder positions to gauge broader market sentiment around NiSource.