NOTIFICATION OF CLOSED PERIOD

SSE plc

Notification of Closed Period

2 October 2025

Ahead of the publication on 12 November 2025 of results for the six months to 30 September 2025, SSE plc is today updating the market on its performance and outlook, including:

· Expecting to report half-year adjusted Earnings Per Share of between 33 and 37 pence, in line with usual seasonal averages and with full year performance expectations remaining unchanged.

· Accelerating delivery in networks business with strong renewables availability offset by unfavourable weather conditions.

· The Group remains on track to deliver 2026/27 adjusted Earnings Per Share of 175 - 200 pence.

Half-year trading update

SSE expects to report interim adjusted Earnings Per Share of between 33 and 37 pence, in line with usual seasonal averages and reflecting the majority of annual earnings being delivered in the second half. Expectations for full year performance remain unchanged.

Delivery in the networks business continues to accelerate with all three LOTI projects in SSEN Transmission now consented and investment in SSEN Distribution progressing under holistic supply chain framework agreements. As a result, adjusted investment in networks is expected to increase by ~60% to ~£1.1bn in the first half, relative to the same period last year.

Strong renewables operational availability over the summer months was offset by unfavourable weather conditions - notably across April and May - with first half output expected to be around 2% lower than the same period last year.

SSE continues to make strong progress on its NZAP Plus investment programme, having submitted the final major ASTI consent application and secured planning permission for the critical Netherton Hub in Aberdeenshire. The final major consent was also received for Berwick Bank offshore wind farm following a decade of development work, clearing the project for potential entry into the UK AR7 auction round. Construction work continues across several sites, including Dogger Bank offshore wind farm and Strathy South onshore wind farm.

Reflecting the strong progress made, total capital expenditure and investment is expected to be around £1.5bn for the half-year, with adjusted net debt and hybrid capital expected to be around £11.5bn.

Half-year Results will be announced on 12 November 2025.