Constellation Energy stock falls despite guidance hike and nuclear contracts

Constellation Energy Corporation stock (ISIN US21037T1097) traded at USD 262.80 on Nasdaq as of September 17, 2026, down about 25.6 percent from its start-of-year level despite stronger earnings and higher guidance for 2026.

Stock under pressure after strong Q2 figures

According to 24/7 Wall St on September 19, 2026, Constellation Energy shares recently closed at USD 254.71, reflecting a year-to-date decline of 27.57 percent and a 10.55 percent drop over the prior week.

The same analysis highlights that Constellation Energy delivered adjusted EPS of USD 2.55 in its second quarter of 2026, beating the consensus estimate of USD 2.33 by 9.52 percent, on revenue of USD 7.504 billion, which was up 23 percent year over year in that period.

Guidance raised and nuclear contracts signed

As 24/7 Wall St reports, management raised its full-year 2026 adjusted operating earnings guidance to a range of USD 11.50 to USD 12.50 per share from a prior range of USD 11.00 to USD 12.00 per share, signaling expectations for stronger profitability this year.

The same source notes that Constellation Energy signed approximately 920 megawatts of long-term nuclear power contracts with an average duration of 18.5 years to investment-grade customers, in addition to existing agreements with large technology companies such as Meta and Microsoft, reinforcing the visibility of future generation revenues.

Valuation and market context

According to MarketBeat, Constellation Energy shares traded at USD 262.80 recently, compared with a level of USD 353.27 at the beginning of 2026, implying a decline of 25.6 percent over that period.

The same overview indicates that Constellation Energy reported EPS of USD 2.55 in the quarter ended June 30, 2026, topping a consensus estimate of USD 2.29 by USD 0.26 per share, while revenue increased by about 23 percent compared with the same quarter a year earlier, underscoring both earnings and top-line momentum.

Analyst expectations and next earnings date

According to Zacks data updated on September 17, 2026, Constellation Energy last reported quarterly earnings of USD 2.55 per share, above the Zacks Consensus Estimate of USD 2.36 per share, representing an earnings surprise of 8.05 percent.

The same earnings calendar shows that Zacks expects Constellation Energy to report EPS of USD 3.96 for the quarter ending September 2026, which would represent a year-over-year increase of 30.26 percent if achieved, with the next earnings release estimated for November 6, 2026.

Constellation Energy stock price snapshot

Per Nasdaq-linked price data cited by Zacks, Constellation Energy stock closed at USD 262.80 on Nasdaq on September 17, 2026, with a gain of USD 3.27 or 1.26 percent on the day, and an after-market indication of USD 262.73 shortly after the close.

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