CHALLENGER LIMITED — Major Shareholding Notification 2021

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Sydney

Level 2, 5 Martin Place Sydney NSW 2000 Australia GPO Box 3698 Sydney NSW 2001 www.challenger.com.au Telephone 02 9994 7000 Facsimile 02 9994 7777

21 December 2021

The Manager Company Announcements Office ASX Limited 20 Bridge Street SYDNEY NSW 2000

By electronic lodgement

Dear Sir/Madam

Re: Notice of ceasing to be a substantial holder ~ Santos Limited (STO)

We attach a notice of ceasing to be a substantial holder in Santos Limited. This notice is given by Challenger Limited and each of its associated entities named in Annexure 2 to this notice.

Yours faithfully

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Linda Matthews Company Secretary

Melbourne Level 19, 31 Queen Street PO Box 297, Flinders Lane, Melbourne VIC 3000 Telephone 02 9994 7000 Facsimile 02 9994 7777 Brisbane Level 6, 215 Adelaide Street GPO Box 3234, Brisbane QLD 4001 Telephone 07 3136 5400 Facsimile 07 3136 5407 Perth Level 26, 140 St Georges Terrace, Perth WA 6000 Telephone 08 6466 9613 Adelaide Level 7, Suite 714, 147 Pirie Street, Adelaide SA 5000 Telephone 08 8427 9511

Challenger Limited ABN 85 106 842 371 Challenger Group Services Pty Limited ABN 91 085 657 307 Challenger Life Company Limited ABN 44 072 486 938 AFSL 234670 Challenger Investment Partners Limited ABN 29 092 382 842 AFSL 234 678 Challenger Retirement and Investment Services Limited ABN 80 115 534 453 AFSL295642 RSE Licence No. L0001304 Challenger Mortgage Management Pty Ltd ABN 72 087 271 109 Challenger Securitisation Management Pty Ltd ABN 56 100 346 898 AFSL 244593 Challenger Investment Solutions Management Pty Ltd ABN 63 130 035 353 AFSL 487354

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Form 605

Corporations Act 2001

Section 671B

Notice of ceasing to be a substantial holder

2. Changes in relevant interests

Particulars of each change in, or change in the nature of, a relevant interest (2) of the substantial holder or an associate (3) in voting securities of the company or scheme, since the substantial holder was last required to give a substantial holding notice to the company or scheme are as follows:

3. Changes in association

The persons who have become associates (3) of, ceased to be associates of, or have changed the nature of their association (7) with, the substantial holder in relation to voting interests in the company or scheme are as follows:

Name and ACN/ARSN (if applicable) Nature of association N/A N/A 4. Addresses The addresses of persons named in this form are as follows: Name Address Challenger Limited (and its entities Level 2, 5 Martin Place, Sydney NSW 2000 listed in Annexure 2)

Signature

DIRECTIONS

(1) If there area number of substantial holders with similar or related relevant interests (eg. a corporation and its related corporations, or the manager and trustee of an equity trust), the names could be included in an annexure to the form. If the relevant interests of a group of persons are essentially similar, they may be referred to throughout the form as a specifically named group if the membership of each group, with the names and addresses of members is clearly set out in paragraph 4 of the form.

• (2) See the definition of "relevant interest" in sections 608 and 671B(7) of the Corporations Act 2001.

• (3) See the definition of "associate" in section 9 of the Corporations Act 2001. (4) Include details of:

(a) any relevant agreement or other circumstances because of which the change in relevant interest occurred. If subsection 671B(4) applies, a copy of any document setting out the terms of any relevant agreement, and a statement by the person giving full and accurate details of any contract, scheme or arrangement, must accompany this form, together with a written statement certifying this contract, scheme or arrangement; and

(b) any qualification of the power of a person to exercise, control the exercise of, or influence the exercise of, the voting powers or disposal of the securities to which the relevant interest relates (indicating clearly the particular securities to which the qualification applies). See the definition of "relevant agreement" in section 9 of the Corporations Act 2001.

(5) Details of the consideration must include any and all benefits, money and other, that any person from whom a relevant interest was acquired has, or may, become entitled to receive in relation to that acquisition. Details must be included even if the benefit is conditional on the happening or not of a contingency. Details must be included of any benefit paid on behalf of the substantial holder or its associate in relation to the acquisitions, even if they are not paid directly to the person from whom the relevant interest was acquired.

• (6) The voting shares of a company constitute one class unless divided into separate classes.

• (7) Give details, if appropriate, of the present association and any change in that association since the last substantial holding notice.

Annexure 1 consists of 4 pages and is referred to in Form 605 signed by me and dated 21/12/2021

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Linda Matthews Company Secretary of Challenger Limited

Transactions:

Company Name/Scheme: Santos Limited (STO) As at: 17/12/2021 Class of security: Ordinary Fully Paid

Page 1 of 4

Page 2 of 4

Page 3 of 4

Page 4 of 4

Annexure 2

This is page 1 of 4 of Annexure 2 referred to in ASIC Form 605 - ceasing to be a substantial holder holder

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Linda Matthews - Company Secretary of Challenger Limited 21/12/2021

Annexure 2

This is page 2 of 4 of Annexure 2 referred to in ASIC Form 605 - ceasing to be a substantial holder holder

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Linda Matthews - Company Secretary of Challenger Limited 21/12/2021

Annexure 2

This is page 3 of 4 of Annexure 2 referred to in ASIC Form 605 - ceasing to be a substantial holder

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Linda Matthews - Company Secretary of Challenger Limited 21/12/2021

Annexure 2

This is page 4 of 4 of Annexure 2 referred to in ASIC Form 605 - ceasing to be a substantial holder holder

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Linda Matthews - Company Secretary of Challenger Limited

21/12/2021