NuScale Power (SMR), a developer of small modular reactor (SMR) technology, saw its stock plunge 8.67% in pre-market trading on Friday. This sharp decline follows a 5.06% drop in the previous trading session, as investors react to news of a significant share sale by the company's majority shareholder, Fluor Corp. (FLR).

Fluor Corp. completed the sale of 15 million shares of NuScale's Class A common stock, valued at approximately $605 million. The transaction, which took place over October 7 and 8, 2025, reduces Fluor's equity ownership in NuScale from a majority position 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 negative reaction to this large-scale share sale reflects growing investor concerns about NuScale's future prospects. The company operates in an increasingly competitive SMR market, with rivals like Oklo, Westinghouse, and GE Vernova also developing their own technologies. Additionally, there are mounting valuation concerns for pre-profit energy companies, particularly those in the clean energy sector. With NuScale not expected to turn a profit until 2030, according to Wall Street analysts, investors may be reassessing the company's current market valuation and long-term potential in light of these challenges.