Constellation Energy is trading 13.22% higher at $303.01 after announcing a major power agreement with Google on October 6, 2026. - Google contracted for 3,590 megawatts, including new nuclear capacity; the deal enables more than $4.3 billion of Constellation investment. - The companies also agreed to a long-term supply arrangement for 2,700 megawatts in PJM. - Reuters reported the deal, which market coverage linked to the sharp premarket move; broader markets were also higher.