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Activist short-seller targets environmental failings

August 17, 2026 · Trellis (formerly GreenBiz) · Score: 18

A new investment fund called Sunlight Partners is betting against companies it sees as environmental offenders, rather than trying to reform them. Its first target was Babcock & Wilcox, a manufacturer with a long history in steam boiler technology that had recently signed deals to power data centers. Sunlight argued the company's proposed projects were unlikely to get built and that its technology was outdated and inefficient. After the report came out in May, Babcock & Wilcox's stock fell 13 percent, dropping from $19.65 to a current price of $9.35. Sunlight, which had bet on the stock falling, said the decline drove a 12 percent return for the fund.

This is a story about how investors are pressuring energy companies, not a program that changes anything for homeowners directly. Sunlight plans to release six to eight similar reports a year, targeting companies it considers guilty of greenwashing or excessive waste, especially smaller firms where one bad business line can hurt the whole stock. The fund's founder says he hopes to grow it to as much as $200 million.

Experts note this approach differs from typical activist investing, which pushes companies to change over time. Short-selling campaigns need quick payoffs, so a fund can profit and move on before a company actually improves its environmental practices. The fund's founder argues that publicizing bad practices still shifts market expectations, which can influence investment and, eventually, environmental outcomes, even without a direct promise of reform from the targeted company.

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