Borr Drilling — Major Shareholding Notification 2023

Dec 20, 2023

The Capital Group Companies, Inc. 333 South Hope Street Los Angeles, CA 90071-1406

capitalgroup.com

19 December 2023

Borr Drilling Ltd. Attn: Magnus Vaaler +47-(0) 9345-8573 ir@borrdrilling.com

Oslo Bors AS (Oslo Stock Exchange) 011 47 22 41 67 90 ma@oslobors.no

Norwegian Central Depository (VPS) 011 47 22 63 52 00 vps@vps.no

Re: The Capital Group Companies, Inc. - Disclosure of acquisition/disposition of large shareholdings - Borr Drilling Ltd. (the "Company")

The Capital Group Companies, Inc. ("CGC") is the parent company of Capital Research and Management Company ("CRMC") and Capital Bank & Trust Company ("CB&T"). CRMC is a U.S.-based investment management company that serves as investment manager to the American Funds family of mutual funds and institutional clients. CRMC and its investment manager affiliates manage equity assets for various investment companies through three divisions, Capital Research Global Investors, Capital International Investors and Capital World Investors. CRMC is the parent company of Capital Group International, Inc. ("CGII"), which in turn is the parent company of four investment management companies ("CGII management companies"): Capital International, Inc., Capital International Limited, Capital International Sàrl and Capital International K.K. CGII management companies primarily serve as investment managers to institutional clients. CB&T is a U.S.-based registered investment adviser and an affiliated federally chartered bank.

Neither CGC nor any of its affiliates own shares of the Company for its own account. Rather, the shares reported on this Notification are owned by accounts under the discretionary investment management of one or more of the investment management companies described above.

Pursuant to Section 4-3 of the Norwegian Securities Trading Act and the Securities Trading Act Regulations, we hereby disclose the following information.

On 18 December 2023, one or more of CGC's management companies acquired 1,707,421 shares of the Company, resulting in a shareholding amounting to 5.583% of total voting rights and 5.583% of total share capital.

These total shareholdings include holdings in BORR DRILLING LTD 144A/REG S CV SR UNSEC 5.0% 02-08-28 (ISIN:NO0012828187) as well as the Common Stock (ISIN:BMG1466R1732).

As of the same date, one of CGC's management companies, Capital Research and Management Company had lent out 139,200 shares of the Company, meaning that 5.52% of the shares were actually held and .052% were lent shares.

Please see the enclosed Schedule A for transaction details and Schedule B for the

number of shares in the Company held by each management company in respect of which this notification relates.

For the purpose of this Report, the total voting rights figure of 264,080,391 votes and the total share capital figure of 264,080,391 shares were used to calculate the percentages. We believe these figures are correct; however, if these numbers are not accurate, please contact us as soon as possible so we may make the necessary revisions.

Should you have questions or require additional information, please contact us at (213) 615-0469 or via e-mail at GRGroup@capgroup.com.

Regards,

_____________________

Torrence M. Frame Senior Compliance Associate

Schedule A - Borr Drilling Ltd. The Capital Group Companies, Inc. Transactions by Management Company As of 18 December 2023

Management Company	Date of transaction	Nature of change	Price per share	Class and number of securities transacted	Votes affected
Capital Research and Management Company	18 Dec 2023	Purchase	7.1500 USD	41,500 Common Stock	41,500
Capital Research and Management Company	18 Dec 2023	Purchase	73.3707 NOK	55,142 Common Stock	55,142
Capital Research and Management Company	18 Dec 2023	Purchase	7.1800 USD	82,800 Common Stock	82,800
Capital Research and Management Company	18 Dec 2023	Purchase	73.9250 NOK	272,726 Common Stock	272,726
Capital Research and Management Company	18 Dec 2023	Purchase	7.1749 USD	273,900 Common Stock	273,900
Capital Research and Management Company	18 Dec 2023	Purchase	73.8500 NOK	418,180 Common Stock	418,180
Capital International Sarl	18 Dec 2023	Purchase	7.1500 USD	7,900 Common Stock	7,900
Capital International Sarl	18 Dec 2023	Purchase	7.1800 USD	15,900 Common Stock	15,900
Capital International Sarl	18 Dec 2023	Purchase	7.1749 USD	52,600 Common Stock	52,600
Capital International, Inc.	18 Dec 2023	Purchase	7.1500 USD	50,600 Common Stock	50,600
Capital International, Inc.	18 Dec 2023	Purchase	7.1800 USD	101,300 Common Stock	101,300
Capital International, Inc.	18 Dec 2023	Purchase	7.1749 USD	334,873 Common Stock	334,873

Schedule B - Borr Drilling Ltd. The Capital Group Companies, Inc.

Holdings by Management Company As of 18 December 2023

Total Shares = Actual Shares + Lent Shares

Management Company	Number of Votes	Percent of total voting rights	Number of Shares	Percent of total shares
Capital Research and Management Company	12,818,078	4.853%	12,818,078	4.853%
Capital International Sarl	284,722	0.108%	284,722	0.108%
Capital International, Inc.	1,641,924	0.622%	1,641,924	0.622%
The Capital Group Companies, Inc.	14,744,724	5.583%	14,744,724	5.583%

Actual Shares

Management Company	Number of Votes	Percent of total voting rights	Number of Shares	Percent of total shares
Capital Research and Management Company	12,678,878	4.801%	12,678,878	4.801%
Capital International Sarl	284,722	0.108%	284,722	.108%
Capital International, Inc.	1,641,924	0.622%	1,641,924	0.622%
The Capital Group Companies, Inc.	14,605,524	5.531%	14,605,524	5.531%

Lent Shares

Management Company	Number of Votes	Percent of total voting rights	Number of Shares	Percent of total shares
Capital Research and Management Company	-139,200	-.052%	-139,200	-.052%
Capital International Sarl	0	0.00%	0	0.00%
Capital International, Inc.	0	0.00%	0	0.00%
The Capital Group Companies, Inc.	-139,200	-.052%	-139,200	-.052%