Activist investor Starboard Value has urged Knife River Corp., a construction materials company, to explore a sale. The recommendation comes after Knife River's stock experienced a notable decline.

On Wednesday, Knife River's stock dropped by more than 7%. This downturn followed the company's own projection of continued challenges, or headwinds, in the market. Starboard Value, known for its activist investment strategies, believes that a sale could be in the best interest of shareholders given the current market conditions and the company's performance.

While the specifics of Starboard's proposal have not been fully detailed, the firm's involvement typically signals a push for significant changes within a company to unlock shareholder value. The call for exploring a sale suggests Starboard sees potential for a higher valuation through an acquisition by another entity.