Block Listing Application

27 May 2025

Tullow Oil plc

("Tullow Oil " or the "Company")

Block Listing Application

A block listing application has been made for 18,000,000 ordinary shares of 10p each in the Company to be admitted to the Official List of the Financial Conduct Authority and an application has been made to the London Stock Exchange for trading on the main market.

The new ordinary shares will be issued from time to time to satisfy the issue of shares pursuant to the exercise of options under the Company's Employee Share Award Plan (10,000,000) and the Tullow Incentive Plan (8,000,000).

It is expected that admission will become effective on or around 2 June 2025. The shares will be issued fully paid and will rank pari passu in all respects with the existing issued Ordinary Shares of the Company.