Gamco Investors Boosts Stake in Knife River Corporation

Investment firm increases holdings in construction materials company by 198.2% in Q3

Published on Mar. 9, 2026

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Gamco Investors INC. ET AL has increased its stake in Knife River Corporation (NYSE:KNF) by 198.2% during the third quarter, according to a recent 13F filing with the SEC. The investment firm now owns 81,899 shares of the construction materials company, worth $6.30 million.

Why it matters

Knife River is a leading integrated construction materials and contracting company in the western United States, specializing in aggregates, asphalt, ready-mixed concrete, and other heavy construction materials. The increase in Gamco's stake suggests the investment firm sees growth potential in the company.

The details

According to the 13F filing, Gamco Investors acquired an additional 54,434 shares of Knife River during the third quarter, bringing its total holdings to 81,899 shares. This represents a 198.2% increase in the firm's stake in the company. Knife River's stock has seen strong performance, rising from $58.72 to a 52-week high of $103.18 over the past year.

  • Gamco Investors increased its stake in Knife River during the third quarter of 2025.

The players

Gamco Investors INC. ET AL

An investment management firm that has increased its holdings in Knife River Corporation.

Knife River Corporation

A leading integrated construction materials and contracting company in the western United States.

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The takeaway

The significant increase in Gamco's stake in Knife River suggests the investment firm sees strong growth potential in the construction materials company, which could signal positive developments for the industry and the broader economy.