Constellation Energy stock falls as Rhode Island plant deal and short interest draw scrutiny
Published on 09/16/2026 at 13:20 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Constellation Energy Corporation stock (ISIN US21037T1097) closed at USD 264.57 on Nasdaq on September 14, 2026, down 7.09 percent from the prior session and extending a multi-day pullback from earlier-year highs, according to MarketBeat.
Rhode Island plant deal reshapes the generation mix
Investor attention in mid-September 2026 has focused on Constellation Energy’s agreement to buy the 609 megawatt Rhode Island State Energy Center, a natural gas-fired combined-cycle plant, from Shell for USD 715 million, as reported by Yahoo Finance on September 10, 2026.
According to Yahoo Finance, RISEC Holdings owns the Rhode Island State Energy Center, which serves the New England power market and will join Constellation’s merchant generation portfolio once the deal closes, expected in the first quarter of 2027 subject to regulatory approvals.
Revenue growth and raised guidance underpin the story
Commentary on the Rhode Island gas plant acquisition compiled by Ad-hoc-news on September 15, 2026 notes that Constellation Energy reported revenue of USD 7.5 billion in the second quarter of 2026, an increase of 23.0 percent compared with the same quarter a year earlier.
As Yahoo Finance reported on September 16, 2026, Constellation delivered better-than-expected earnings in its second quarter of 2026 and raised its full-year adjusted operating earnings guidance range by USD 0.50 per share to USD 11.50 to USD 12.50 per share.
Short interest and year-to-date performance pressure the shares
MarketBeat data as of September 14, 2026 show Constellation Energy stock at USD 264.57 at the close, after having started 2026 at USD 353.27, which represents a decline of 25.1 percent year to date, according to Ad-hoc-news.
Short interest has also increased notably: as of August 31, 2026, Constellation Energy had 11.57 million shares sold short, up 23.0 percent from 9.41 million shares in the previous month, representing 3.28 percent of the public float, according to MarketBeat.
Constellation Energy stock and current valuation context
On September 15, 2026, investing data showed Constellation Energy shares at USD 259.89 on Nasdaq, down 1.77 percent on the day with a 52-week trading range between USD 228.63 and USD 412.70, according to Investing.com.
Ad-hoc-news data based on Nasdaq pricing indicate that Constellation Energy’s market capitalization stood at about USD 30,000,000,000 as of September 15, 2026, reflecting the decline in the share price from its earlier-year level while still signaling a large-cap presence in the S&P 500 utilities space, according to Ad-hoc-news.
Stock price snapshot as of mid-September 2026
As of the last completed trading day before publication, September 15, 2026, Constellation Energy stock closed at USD 259.89 on Nasdaq, 1.77 percent lower than the prior close, with the price sitting about 10.8 percent above the 52-week low of USD 228.63 but still roughly 37.0 percent below the 52-week high of USD 412.70, based on data from Investing.com.
Constellation Energy stock facts
- Company: Constellation Energy Corporation
- ISIN: US21037T1097
- Ticker: CEG
- Trading venue: Nasdaq
- Price (as of September 15, 2026, 15:59): 259.89 USD
- Market capitalization: 30,000,000,000 USD (as of September 15, 2026)
- Sector / Industry: Utilities / Energy
- Index membership: S&P 500
