Budget airline easyJet is poised to re-enter the FTSE 100 index in this week’s scheduled reshuffle, following a surge in its share price driven by a recommended £5.7 billion takeover bid from American private equity firm Apollo Capital Management. While the inclusion signals renewed investor confidence, easyJet’s continued presence in the FTSE 100 will depend on the outcome of regulatory scrutiny surrounding the acquisition and whether European authorities approve the proposed change in ownership structure.

Alongside easyJet, North Sea oil and gas producer Ithaca Energy is also expected to be promoted to the FTSE 100. Ithaca Energy’s market capitalization has increased to roughly £4.5 billion, buoyed by solid financial results and rising oil and gas prices, with its shares gaining approximately 64 percent year-to-date.

Conversely, two companies are likely to be demoted from the FTSE 100, moving down to the FTSE 250. Entain, a gambling group behind brands such as Ladbrokes and Coral, has seen its shares drop around 30 percent this year. Its decline has been attributed partly to a significant increase in the UK remote gaming duty, which rose from 21 percent to 40 percent in April. Similarly, housebuilder Persimmon is expected to exit the FTSE 100 after its share price fell approximately 13 percent over the year.

In the FTSE 250, Aston Martin Lagonda is set to move out of the mid-cap index and into the SmallCap index, reflecting its ongoing financial challenges. Meanwhile, Pinewood Technologies Group, an automotive tech firm currently subject to a takeover bid, and Volex, an electrical manufacturing company controlled by Lord Rothschild, are both anticipated to be promoted into the FTSE 250.

These changes are based on an indicative review by index provider FTSE Russell, using market data as of August 21. The official review will consider share prices at the close of trading on September 1, with confirmed adjustments scheduled for announcement on September 2. According to FTSE Russell’s methodology, companies are removed from the FTSE 100 if they fall below 110th position in market capitalization.

EasyJet’s re-entry into the FTSE 100 follows a turbulent period marked by heavy losses during the previous winter and challenges with price-sensitive customers over the summer months. The company has fluctuated in and out of the premier index over the years. The ultimate weight of the takeover’s regulatory process remains a key variable in its ongoing standing among the UK’s largest publicly traded firms.