Exhibit 4.26



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|LOGO |  |                         |  | Randgold Resources Limited
|     |  | Reg No. 62686          
|     |  | 3 Floor, Unity Chambers
|     |  | 28 Halkett Street      
|     |  | St. Helier, Jersey     
|     |  | JE2 4WJ                
|     |  | CHANNEL ISLANDS        
|     |  | TEL : +44 1534 735 333 
|     |  | FAX : +44 1534 735 444 
|     |  |                         | 
|     |  |                         |  |                            |  | LOGO

28 January 2013

The Honourable Mrs Jeanine Mabunda Lioko

11 Nguma Street

Ngaliema

Kinshasa

Democratic Republic of the Congo

Dear Mrs
Mabunda Lioko,

RANDGOLD RESOURCES LIMITED (THE COMPANY) AND APPOINTMENT

TO THE BOARD AS A NON-EXECUTIVE DIRECTOR

The board of the Company (the Board) is pleased to confirm the main terms of your appointment as a non-executive director (with details relating to the appointment period being
contained in the paragraph hereof titled Appointment). It is agreed that this is a contract for services and not a contract of employment. You should be aware that your appointment is subject to the Companys articles of
association as amended from time to time. If there is a conflict between the terms of this letter and the articles of association then the articles shall prevail.

DUTIES



|1. | The Board is responsible for promoting the success of the Company by directing and supervising the Companys affairs, including:
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| | (a) | supervising and providing guidance to the Company within a framework of prudent and effective controls;
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| | (b) | approving the Companys objectives and strategic plan, ensuring that the necessary financial and human resources are in place for the Company to meet its strategic
objectives, and review management performance; and
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| | (c) | setting the Companys values and standards and ensuring that its obligations to its stakeholders are met.
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|2. | The Board Charter (annexed hereto marked Annexure A) describes how the Board is structured and what authorities are delegated to the Chief Executive.
Details of powers specifically reserved for the Board are listed in paragraph 13 of the Board Charter. The Charters of the Board Committees are available on the Companys website and can be obtained from the Companys Secretary.
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|3. | Your role as a non-executive director is to:
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| | (a) | contribute to the development of strategies to attain the Companys objectives;
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| | (b) | evaluate the performance of Executive Directors in meeting agreed objectives and implementing strategies;
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| | (c) | satisfy yourself that publicly available financial information is accurate and that financial controls and systems of risk management are robust and effective; and
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| | (d) | be responsible, for determining appropriate levels of remuneration of the Executive Directors, and where necessary, members of the Executive Management Team.
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|4. | You will, in conjunction with paragraph 4 of the Board Charter, be required to:
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| | (a) | perform your duties loyally and diligently;
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| | (b) | bring independent judgement to bear on issues of strategy, policy, resources, performance and standards of conduct;
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| | (c) | provide guidance and direction in planning, developing and implementing the strategic direction of the Company;
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| | (d) | contribute to the effective control of the Company and to the supervision of the Executive Directors;
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| | (e) | attend wherever possible in person or by conference call all meetings of the Board, which meets at least quarterly, and consider all relevant papers well in advance of
each meeting;
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| | (f) | serve on any Committee to which you are nominated by the Board;
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| | (g) | attend the Annual General Meeting of the Company if requested;
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| | (h) | comply with your fiduciary and statutory duties (including under the Companies (Jersey) Law 1991, as amended, which can be obtained from the Companys Secretary);
and
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| | (i) | comply with the Companys Code of Conduct and Anti-Corruption Compliance Policy, which are available on the Companys website and can be obtained from the
Company Secretary.
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|5. | Overall the Company anticipates that you will be available to fulfil your duties as and when you are needed, and the Company expects that the minimum time commitment
over a normal year will equate to approximately 5 days per quarter on your work for the Company. This will include the quarterly board meetings, at least one site visit per year, and the appropriate period of time preparing for each meeting. By
accepting this appointment, you confirm that you are able to allocate sufficient time to the Company to discharge your duties effectively. You also acknowledge that there may be circumstances in which you will need to devote additional time to your
duties, such as when the Company is undergoing a period of particularly increased activity, or as a result of some major difficulty with one or more of its operations. In these circumstances you agree to work such additional hours (without any
additional remuneration, unless it is specifically agreed by the Remuneration Committee and approved by the Board) as may be required for the proper performance of your duties.
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|6. | You will, be entitled to request such information from the Company, its subsidiaries or its employees, consultants or professional advisers as may be reasonably
necessary to enable you to perform your role effectively. The Company shall use its reasonable endeavours to provide such information.
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|7. | The performance of individual directors, the whole board and its committees is evaluated annually. If in the interim there are any matters which cause you concern about
your role, you should discuss them with the Chairman as soon as you can.
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CONFIDENTIALITY

During the course of your duties you will have access to confidential information belonging to the Company and its subsidiaries (including, but not
limited to, details of suppliers, customers, margins, know-how, marketing and other relevant business information). Unauthorised disclosure of this information could seriously damage the Company. You therefore undertake not to use or disclose such
information save in pursuance of your duties or in accordance with any statutory obligation or court or similar order.



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COMPLIANCE WITH REGULATORY REQUIREMENTS

The Company is committed to the UK Corporate Governance Code and the associated Guidance on Board Effectiveness published by the Financial Reporting Council, copies of which can be obtained from the
Company Secretary. You will be expected to carry out your duties in accordance with these.

You undertake to comply with all legal and
regulatory requirements and any code of practice or compliance manual issued by the Company relating to transactions in securities and inside information and dealing in force from time to time, including the Companys current Share Dealing Code
and any rules and regulations of or under the Financial Services Authority (including the Model Code, the Listing Rules, the Disclosure and Transparency Rules), the Financial Services and Markets Act 2000, the Criminal Justice Act 1993, the
Financial Services (Jersey) Law 1998 and other rules and regulations of relevant regulatory authorities relevant to the Company (the Regulatory Requirements).

By accepting this appointment you acknowledge that you are aware of and understand the Regulatory Requirements and that a breach of the Regulatory Requirements carries sanctions including criminal
liability, disciplinary action by the relevant regulatory authority (civil liability, fines and public censure by the FSA) and the immediate termination of your appointment.

Due to your position you will be named on the Companys list of persons with access to inside information relating to the Company which can be made available to the FSA.

You acknowledge that the non executive directors are required, pursuant to the Companys Shareholding Policy, to hold ordinary shares in the Company
with a value of at least US$100,000 (i.e. an amount equal to twice the annual retainer fee).

OUTSIDE INTERESTS

You should seek the agreement of the Chairman of the Board before you accept any public company appointments or any new outside interests, which might
affect the time you are able to devote to this appointment.

The Board have determined you to be independent, according to the provisions of
the UK Corporate Governance Code.

In accordance with the principles set out in the UK Corporate Governance Code you must seek approval of the
Chairman of the Board in relation to of any interests which you have, or acquire, which might reasonably be thought to jeopardise your independence from the Company.

During your appointment you must seek approval of the Chairman of the Board in relation to any office or employment with, or have any material interest in, any firm or company which is or may be in direct
or indirect competition with the Company.

INSURANCE

During your appointment you will be covered by the Companys directors and officers liability insurance on the terms in place from time to time. A copy of the policy document is available
from the Company Secretary. The Company will maintain this insurance cover after the termination of your appointment, and you will continue to be covered by the policy (or any replacement on the same basis as the rest of the Board) for matters
related to your duties as a non executive director during your period of service.

APPOINTMENT

Your appointment will commence on 28 JANUARY 2013. It is terminable by three months notice from either the Board or yourself. The continuation of
your appointment depends upon re-election at the forthcoming Annual General Meetings and will follow the rules of the UK Corporate Governance Code.



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Notwithstanding the aforementioned notice provisions, the Company may terminate your appointment with
immediate effect if you have:



|(a) | committed any serious breach or (after warning in writing) any repeated or continued material breach of your obligations to the Company (which include an obligation not
to breach your fiduciary duties) or of any Regulatory Requirement;
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|(b) | been guilty of any act of dishonesty or serious misconduct or any conduct which (in the reasonable opinion of the Board) tends to bring you or the Company into
disrepute; or
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|(c) | been declared bankrupt or have made an arrangement or composition with for the benefit of your creditors.
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All appointments and reappointments to the Board are subject to the Companys Articles of Association. You are required to stand for re-election
every year at the Annual General Meeting. If you are not re-elected to your position as a director of the Company by the shareholders at any time and for any reason then this appointment shall terminate automatically and with immediate effect.

On termination of the appointment you shall only be entitled to such fees as may have accrued to the date of termination together with
reimbursement in the normal way of any expenses properly incurred prior to that date.

REMUNERATION

The fee is US$50,000 per annum and is payable half yearly in arrears. In addition, should you be appointed to serve on a Board Committee the fees payable
are as follows:



|(a) | Audit Committee: US$35,000 per annum.
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|(b) | Remuneration Committee: US$25,000 per annum.
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|(c) | Nomination & Governance Committee: US$10,000 per annum.
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The chairman of a board committee is entitled to receive an additional premium to the committee assignment fee of US$15,000 per annum.

Furthermore, each non-executive director receives an award of 1200 ordinary shares in the Company per year.

Remuneration is reviewed periodically by the Board and submitted annually to the Annual General Meeting for approval.

EXPENSES

The Company will reimburse you for any expenses that you may incur properly and
reasonably in performing your duties and which are documented and in accordance with the Companys Board Travel Policy.

DATA
PROTECTION

By signing this agreement you consent to the Company holding and processing information about you which you or any referees may
provide or which it may acquire during the course of this agreement, providing such use is in accordance with the Data Protection Act 1998 and the Data Protection (Jersey) Law 2005. In particular you consent to the Company holding and processing:



|(a) | personal data relating to you, for administrative and management purposes; and
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|(b) | sensitive personal data relating to you (as defined in the Data Protection Act 1998 and the Data Protection (Jersey) Law 2005)
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THIRD PARTY RIGHTS

The Contracts (Rights of Third Parties) Act 1999 shall not apply to this agreement. No person other than the parties to this agreement shall have any rights under it and it will not be enforceable by any
person other than the parties to it.

GOVERNING LAW

This agreement, and any dispute, controversy, proceedings or claim of whatever nature arising out of or in any way relating to this agreement or its formation (including any non-contractual disputes or
claims), shall be governed by and construed in accordance with Jersey law. Each of the parties to this agreement irrevocably agrees that the courts of Jersey shall have exclusive jurisdiction to hear and decide any suit, action or proceedings,
and/or to settle any disputes, which may arise out of or in connection with this agreement and, for these purposes, each party irrevocably submits to the jurisdiction of the courts of Jersey.

Please sign and return the enclosed copy of this letter to confirm your agreement to the above terms.

The Company looks forward to working with you in the future.



|                          
|--------------------------
|Yours sincerely           
|                          
|LOGO                      
|                          
|P Liétard                 
|for and on behalf of      
|RANDGOLD RESOURCES LIMITED



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LOGO



I, Jeanine Mabunda Lioko, agree to the above terms of appointment as a non-executive director of
Randgold Resources Limited.



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|Signature: |  | LOGO |  |  |  | Date: |  | 28 January 2013