NuScale Power (SMR), a developer of small modular reactor technology, saw its stock plummet 5.06% in Thursday's trading session following news of a significant share sale by its majority shareholder. The steep decline comes as investors react to Fluor Corp.'s divestment of 15 million shares, valued at approximately $605 million.

Fluor Corp. (FLR), which has been an early investor in NuScale, completed the sale of its Class A common stock over two days, October 7 and 8, 2025. The transaction, which represents a portion of Fluor's direct holdings in NuScale, brings Fluor's equity ownership down to 39%. Despite the substantial sale, Fluor continues to hold 111 million NuScale Class B units and associated Class B shares, maintaining its position as a significant stakeholder in the company.

The market's reaction to this large-scale share sale reflects investor concerns about potential shifts in NuScale's ownership structure and the implications for the company's future. While Fluor stated that it plans to use most of the proceeds to bolster an ongoing share repurchase program, the move has sparked speculation about the long-term prospects of NuScale Power. As the small modular reactor market continues to evolve, investors will likely keep a close eye on NuScale's ability to secure orders, navigate regulatory challenges, and maintain its competitive edge in an increasingly crowded market.