Current report pursuant to ASF Regulation No. 5/2018 on issuers of financial instruments and market operations

Report date: 13.08.2026

Name of the issuing entity: Societatea Nationala NUCLEARELECTRICA S.A.

Registered office: 48 Iancu de Hunedoara Boulevard, Sector 1, Bucharest

Phone/fax number: 021-203.82.00 / 021 – 316.94.00

Unique registration code with the Trade Registry Office: 10874881

Registration number in the Trade Register: J1998007403409

Subscribed and paid-in share capital: 3,016,438,940

Regulated market on which the issued securities are traded: Bucharest Stock Exchange

To:                  Bucharest Stock Exchange

        Financial Supervisory Authority

Important Event to Report: Controlled Shutdown of Unit 2 at the Cernavoda Nuclear Power Plant on the morning of August 13, 2026

SN Nuclearelectrica SA announces that, on the morning of August 13, 2026, it began procedures for the controlled shutdown of Unit 2 at the Cernavoda Nuclear Power Plant.

The decision to perform a controlled shutdown of Unit 2 is driven by the significant and ongoing decline in the Danube River’s water level.

The controlled shutdown of Unit 2 is being carried out in accordance with procedures for such situations, based on strict monitoring of safety margins, equipment, and the INHGA forecast for the coming days.

Depending on how the forecasts for the Danube’s water level evolve, CNE Cernavoda specialists will decide when to restart the nuclear units, prioritizing all nuclear safety margins.

Keeping both units in a safe shutdown state has no impact on nuclear safety parameters, and therefore on personnel, the environment, or the population.

Nuclearelectrica will issue a press release when Units 1 and 2 are reconnected to the National Power System.

Cosmin Ghita

Chief Executive Officer