Constellation Energy Shares Plunge 8.3% on Weak 2026 Earnings Outlook

Constellation Energy (CEG) shares experienced a sharp decline of 8.3% following a recent investor update that raised concerns about future growth. The sell-off was primarily triggered by the company's 2026 adjusted earnings guidance, which fell short of analyst expectations. Investor sentiment was further dampened by the absence of new data center partnership announcements during the presentation, a catalyst many had anticipated. Market participants had been looking for concrete developments related to the surging energy demand from artificial intelligence infrastructure. This disappointing outlook impacted the broader utilities sector (XLU), as investors now question the pace at which energy companies can monetize the data center narrative. Analysts suggest that the lack of new deals may lead to a near-term re-evaluation of premium valuations within the sector.