Borr Drilling Limited – Notification of PDMR Transaction

Hamilton, Bermuda, September 21, 2026 – Borr Drilling Limited (NYSE and OSE: BORR) (the "Company") has received notification of a transaction related to Mr. Bruno Morand, Chief Executive Officer of the Company and a person discharging managerial responsibilities (“PDMR”) in the Company.

Mr. Morand has purchased 45,500 shares at an average price of USD 4.40 per share.

For further information, please see the transaction form enclosed with this announcement.

About Borr Drilling Limited Borr Drilling Limited is an international drilling contractor incorporated in Bermuda in 2016 and listed on the New York Stock Exchange since July 31, 2019 and on Euronext Oslo Børs since May 21, 2026 under the ticker "BORR." The Company owns and operates jack-up rigs of modern and high specification designs and provides services focused on the shallow-water segment to the offshore oil and gas industry worldwide. Please visit our website at www.borrdrilling.com.

This information is subject to the disclosure requirements pursuant to MAR Article 19 and Section 5-12 of the Norwegian Securities Trading Act.

Contact Benjamin Wiseman Senior Manager, Corporate Finance & Investor Relations +44 122 4289 230 ir@borrdrilling.com