Serica Energy to be removed from FTSE AIM indexes after Main Market listing transfer

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23.10.2026

Serica Energy to be removed from FTSE AIM indexes after Main Market listing transfer — Serica exits AIM indexes

Serica Energy is set to leave several FTSE AIM indexes as its expected listing transfer from AIM to the Main Market moves ahead. The changes take effect from the start of trading on 27 October 2026 and affect three UK equity benchmarks.

Highlights

FTSE Russell will remove Serica Energy from FTSE AIM UK 50, FTSE AIM 100, and FTSE AIM All-Share indexes following its listing transfer.
Index deletions are effective from the start of trading on 27 October 2026, per notice dated 22 October 2026.
Serica Energy's move from AIM to the Main Market will impact index-tracking investors and mandates specifically tied to the AIM market.

Index changes tied to listing move

As reported by London Stock Exchange, FTSE Russell says Serica Energy will be deleted from the FTSE AIM UK 50 Index, FTSE AIM 100 Index and FTSE AIM All-Share Index, subject to the expected transfer of its listing from AIM to the Main Market.

The notice is dated 22 October 2026 and sets the effective date for all three index changes at the start of trading on 27 October 2026. The update identifies Serica Energy as an existing constituent and links the deletions directly to the anticipated market transfer.

Market implications for UK investors

Removal from the AIM index series typically changes how index-tracking investors and benchmark users classify a stock, particularly where mandates are tied specifically to the AIM market. A move to the Main Market can also alter the company's visibility within different parts of the UK equity market.

For market participants, the announcement provides a short timetable for any portfolio or benchmark adjustments before the changes become effective. FTSE Russell also provides client service contacts across Asia Pacific ex Japan, Japan, Europe, Middle East and Africa, and North America for further information.

In our earlier coverage of the UK’s pre-Budget fiscal stance, we explained how Chancellor John Healey reaffirmed a deficit-reduction strategy ahead of the 28 October Budget while pointing to modest resilience in the latest GDP figures. We also noted the growing political debate over how to balance fiscal discipline with measures to support growth and maintain investor confidence.

This material may contain third-party opinions, none of the data and information on this webpage constitutes investment advice according to our Disclaimer. While we adhere to strict Editorial Integrity, this post may contain references to products from our partners.

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