NRG Energy is trading 8.3% up at $130.66 after rising from the August 12 regular-session close of $120.62, with no new company-specific catalyst identified.
- Available company disclosures identify no new August 12 announcement or catalyst.
- The latest earnings release, dated August 4, reaffirmed 2026 guidance and highlighted data-center growth; those developments predate this move.
- Broader markets were modestly positive but insufficient to clearly explain the outsized after-hours gain.