Grantham Mayo Van Otterloo & Co. LLC Reduces Stake in Kosmos Energy

The investment firm decreased its holdings in the oil and gas producer by 5.5% in the third quarter.

Published on Mar. 8, 2026

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Grantham Mayo Van Otterloo & Co. LLC, a major institutional investor, decreased its position in Kosmos Energy Ltd. (NYSE:KOS) by 5.5% in the third quarter. The firm now owns 34,780,967 shares of the oil and gas producer's stock, worth approximately $57.74 million.

Why it matters

Kosmos Energy is a prominent independent oil and gas exploration and production company, and changes in ownership by major institutional investors can signal shifts in market sentiment around the company's prospects.

The details

According to a 13F filing with the SEC, Grantham Mayo Van Otterloo & Co. LLC sold 2,039,300 shares of Kosmos Energy during the third quarter. The firm now owns a 7.27% stake in the company, down from 7.68% previously.

  • The transactions occurred in the third quarter of the year.

The players

Grantham Mayo Van Otterloo & Co. LLC

A major institutional investment firm that manages over $65 billion in assets.

Kosmos Energy Ltd.

An independent oil and gas exploration and production company headquartered in Dallas, Texas.

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The takeaway

The reduction in Grantham Mayo Van Otterloo & Co. LLC's stake in Kosmos Energy could signal a shift in market sentiment around the company, though the overall reasons behind the firm's trading activity are not entirely clear from the limited information provided.