Dallas, Texas – Vistra, an electric and power generation firm, is set to join the S&P 500 index before Wednesday’s market open, according to a statement released by S&P Dow Jones Indices on Friday evening. The move comes as Vistra replaces Pioneer Natural Resources, which is undergoing acquisition by Exxon Mobil.

In a significant development, bitcoin miner Marathon Digital will transition to the S&P SmallCap 600 index, while heating and AC company AAON will move up to the S&P MidCap 400 index. These changes reflect the dynamic shifts occurring within the market and the strategic positioning of various companies within different indices.

Vistra’s stock surged by 4.2% on Friday night, contributing to a remarkable growth of almost 112% so far in 2024. This uptick can be attributed to the increasing power demands from data centers, driven by the rise of artificial intelligence technologies. Investors are eagerly anticipating Vistra’s Q1 earnings report, which is scheduled for release on Wednesday morning.

Meanwhile, Marathon Digital saw a late increase of 4.85% in its stock value. The company’s move to the S&P SmallCap 600 index is expected to attract more funds due to a higher tracking presence, potentially bolstering the outlook for MARA stock in the future. On the other hand, AAON’s promotion to the S&P MidCap 400 index was met with a 3% decline in its stock value.

Overall, these index changes reflect the evolving landscape of the market and the continuous efforts of companies to adapt and position themselves strategically. As investors monitor these developments, the performance of Vistra, Marathon Digital, and AAON will be closely watched in the coming days to gauge their impact on the respective indices and overall market performance.