Vistra Energy Corp. (VST) shares plummeted 5.07% in pre-market trading on Thursday following the release of its third-quarter earnings report, which fell short of analyst expectations. The electricity and power generation company reported disappointing financial results, causing investors to reassess their positions.

Vistra's Q3 revenue came in at $4.97 billion, significantly below the analyst consensus estimate of $6.11 billion and marking a 20.94% decrease from the $6.29 billion reported in the same period last year. Net income also took a hit, falling to $652 million from $1.84 billion in the previous year, well below the FactSet analyst expectation of $919.6 million.

Despite the disappointing quarterly results, Vistra provided some positive outlook for the future. The company narrowed its 2025 adjusted EBITDA guidance to $5.7 billion - $5.9 billion and initiated 2026 guidance of $6.8 billion - $7.6 billion. Additionally, Vistra announced a $1 billion share repurchase authorization through 2027, which may help support the stock price in the long term. However, these forward-looking statements were not enough to offset the immediate negative reaction to the earnings miss.