- Easyjet and Ithaca Energy to join the FTSE 100 Index, with Entain and Persimmon to leave the Index
- Five changes to the FTSE 250 Index
FTSE Russell, LSEG’s global index provider, confirms today that Easyjet and Ithaca Energy will join the FTSE 100 Index as a result of the September 2026 quarterly review. In the rebalance, Entain and Persimmon will leave the FTSE 100 Index and enter the FTSE 250 Index.
The rules-driven, impartial quarterly reviews ensure the indexes continue to portray an accurate reflection of the market they represent and form an essential component to the management of the indexes.
The FTSE 100 and FTSE 250 Index will see the following changes (in alphabetical order):
| FTSE 100 Additions | FTSE 100 Deletions |
| Easyjet | Entain |
| Ithaca Energy | Persimmon |
| FTSE 250 Additions | FTSE 250 Deletions |
| Entain | Aston Martin Lagonda Global Holdings |
| Persimmon | Easyjet |
| Pinewood Technologies Group | GB Group |
| Seraphim Space Investment Trust * | Ithaca Energy |
| Volex |
* Newly listed multiple line of existing constituent, Seraphim Space Investment Trust (FTSE 250, BKPG013)
All changes from this review will be implemented at the close of business on Friday, 18 September 2026 and take effect from the start of trading on Monday, 21 September 2026. For more information, read the technical notice here.
