Corporate Governance

We integrate sustainability into our core business practices

We integrate sustainability into our core business practices, working to create economic value for the Group while delivering ongoing benefits to all our stakeholders.

Through our robust corporate governance practices, we can conduct our business responsibly, providing attractive returns to our investors and actively contributing to the societies in which we operate.

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Our approach to Corporate Governance

Corporate Governance is embedded in the way we organise our business, with local boards and sub-committees taking responsibility for our operations in local jurisdictions. As a Board, we are committed to maintaining regular open dialogue and effective communication with all our shareholders, customers, employees, suppliers and local communities.

To maintain the best governance system, the Board remains committed to encouraging integrity and transparency at all levels across all aspects of the Group. We believe our governance framework and our company policies support effective decision-making that contributes to the success of the Group in the long term. We also continue to ensure the Board and its Committees function effectively and that they provide strong and valuable contributions to our deliberations and that no individual or group dominates the Board’s decision-making process.

We continue to be mindful of our duties as Directors to manage the Group for the long-term benefit of all its stakeholders. We conduct ongoing formal and informal training in order that we remain appraised of all legislative and regulatory updates that affect how we conduct our business.

The 2024 UK Corporate Governance Code, which applies to all companies listed in the commercial companies category for accounting period beginning on or after 1 January 2025, with the exception of Provision 29 (effective on or after 1 January 2026), emphasises, the importance of businesses building trust by forging strong relationships with key stakeholders. It calls for companies to create a corporate culture that is aligned with the company’s purpose, business strategy, promotes integrity and values diversity and also provides a stronger basis for the board’s accountability for effective controls.

The Board conducts an annual Performance review, taking into consideration the above themes, the outcomes of which are included in the agenda and reported on in our Annual Reports.

Leadership

Please click on a leader below for more information

Non-Executive Directors

  • Mike Brown

  • Rosalind Kainyah

  • Janet Blas

Mike Brown

X

Mike Brown

Non-Executive Chairperson

B.Sc. Engineering ( Mining) (University of Witwatersrand); PR. Eng (ECSA); Strategic Executive Program (London Business School)

Mike has over 40 years’ experience in the resources industry in operational, senior management and director roles. He spent six years in Switzerland as the Managing Director technical at Pala, where he oversaw all technical aspects of the mining sector investments, including the risks associated with resource performance, project management, ramp-up, operations, and the associated working capital and financial controls. Prior to joining Pala, Mike spent 21 years with De Beers in southern Africa in various roles, culminating in the post of chief operating officer where he was accountable for five operating mines, including greenfield and brownfield growth projects. He also managed the restructuring at De Beers Consolidated Mines in 2005/2006 and again in 2009. Mike has overseen growth projects and building of mines in Namibia, South Africa, Sierra Leone, Vietnam and USA.

Appointed

Mike joined the Board in January 2018 and was appointed as Non-Executive Chairperson in June 2026.

Board Committee Membership

Chairperson of the Nomination and Sustainability Committees.

Current external appointments

None

Rosalind Kainyah

X

Rosalind Kainyah

Non-Executive Director

BA (Hons) (University of Ghana); LLB (Hons) (University of London); LLM (University College, University of London); Member of the Bar of England & Wales (Gray’s Inn)

Rosalind is a trusted adviser to Boards and Senior Executives on sustainability and responsible business. She trained as a lawyer and is a member of the Bar of England and Wales. Rosalind has over 30 years of combined international, senior management, executive and board level experience. She has worked with companies and organisations including Linklaters, Anglo American Corporation of South Africa, De Beers, Tullow Oil plc, the United Nations Environment Programme and ERM, and on projects across Africa, in the UK, Europe, North and South America, Asia, and the South Pacific. As a result, she has a wide network and is respected across a range of stakeholders from governments and corporates through civil society organisations and media for her professional expertise and as a woman of integrity and credibility.

Appointed

Rosalind joined the Board in May 2021.

Board Committee Membership

Chairperson of the Remuneration Committee and a Member of the Audit, Nomination and Sustainability Committees.

Current external appointments

Rosalind is currently a non-Executive Director for discoverIE plc, EnQuest plc and of two private companies.

Janet Blas

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Janet Blas

Non-Executive Director

Janet is an accomplished professional with extensive experience in the finance, gemstone and mining industries. She holds a Certified Public Accountant qualification, complemented by a BSc in Accountancy. Janet began her career with PwC, building a solid technical foundation in financial management and audit practices. She has established herself as an effective Audit & Risk Committee Chair, demonstrating a deep understanding of governance practices in both listed and privately held mining companies.

Currently, Janet is the Chief Financial Officer and Executive Director of Bacanora Lithium Limited. Her previous tenure as Chief Financial Officer at Gemfields Group has provided her with a comprehensive understanding of the complexities and strategic demands of the precious minerals sector. She also held a number of senior positions with ENRC Plc, including a key role in ENRC’s initial public offering on the Main Market of the London Stock Exchange when the company joined the FTSE 100 index. Previously, Janet was part of the Audit and Assurance Services Team at Ernst & Young LLP in London and PWC in the Philippines.

Janet is recognized for her strong board governance experience, consistently implementing effective financial oversight structures. Her career has predominantly focused on the mining industry, where she has developed in-depth sector expertise across various commodities and established a proven track record leading teams across multiple jurisdictions. Additionally, she has been actively involved in integrating ESG principles into operations, emphasizing ethical mining practices, transparency, and community engagement.

Appointed

Janet was appointed as Non-Executive Director in April 2025.

Board Committee Membership

Chairperson of the Audit Committee and a member of the Remuneration Committee.

Current external appointments

Janet holds Non-Executive board roles with Sedibelo Resources and Cornish Lithium, alongside her executive position as Chief Financial Officer and Director of Bacanora Lithium. All these companies are privately held.

Executive Directors

  • Clifford Elphick

  • Michael Michael

Clifford Elphick

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Clifford Elphick

Chief Executive Officer

BCom (University of Cape Town); BCompt Hons (University of South Africa)

Clifford joined Anglo American Corporation in 1986 and was seconded to E Oppenheimer & Son Proprietary Limited as Harry Oppenheimer’s personal assistant in 1988. In 1990, he was appointed Managing Director of E Oppenheimer & Son, a position he held until leaving in December 2004. During that time, Clifford was also a Director of Central Holdings, Anglo American and DB Investments. Following the privatisation of De Beers in 2000, Clifford served on the De Beers Executive Committee.

Appointed

Clifford formed Gem Diamonds in July 2005.

Current external appointments

Clifford is currently the non-Executive Chairperson of Zanaga Iron Ore Co. Limited.

Michael Michael

X

Michael Michael

Chief Financial Officer

BCom Hons (Rand Afrikaans University); CA(SA)

Michael has over 25 years’ experience in financial management. He joined the audit firm RSM Betty & Dickson in Johannesburg, South Africa in January 1993 and became audit partner at the firm in March 2000. From August 2006 to February 2008 Michael was seconded to Gem Diamonds Limited to assist with the financial aspects of the main London listing, including the financial reporting, management accounting and tax relating to the initial public offering. In March 2008 Michael joined Gem Diamonds on a full-time basis as the Group Financial Manager. On 22 April 2013 he was promoted to the position of Chief Financial Officer and appointed to the Board.

Appointed

Michael joined Gem Diamonds in March 2008 and was appointed to the Board in April 2013.

Current external appointments

None

Executive Management

  • Brandon de Bruin

  • Kiki Constantopoulos

  • Minelle Zech

Brandon de Bruin

X

Brandon de Bruin

Chief Operating Officer

BCom, LLB (University of the Witwatersrand)

Brandon joined Gem Diamonds in 2007 from Clifford Chance LLP. Practising in New York and London, he specialised in debt and equity capital markets and corporate finance, gaining extensive commercial and legal experience in international corporate and finance transactions, stock exchange listings in London, Luxembourg and New York and in the UKLA (UK) and SEC (USA) rules and regulations. At Gem Diamonds, Brandon has been responsible for numerous corporate and financial transactions. He was head of the Group’s Sales, Marketing and Manufacturing division from 2013 to 2017 when he was appointed as the Group Business Transformation Officer. In 2019 Brandon was appointed as the Group Operations and Business Transformation Executive and in 2021 as Chief Operating Officer.

Appointed

Brandon joined Gem Diamonds in August 2007.

Current external appointments

None

Kiki Constantopoulos

X

Kiki Constantopoulos

Group Financial Controller and Company Secretary

BCom Hons (University of the Witwatersrand); CA(SA)

Kiki has almost 20 years’ experience in accounting, reporting and financial management. Following her qualification as a Chartered Accountant she spent three years as a financial manager at Dunns Clothing & Accessories (a subsidiary of Pepkor, a leading retailer in South Africa). In 2010, Kiki joined Gem Diamonds as Financial Manager, and in 2013 was promoted to Group Financial Controller. Kiki was the finance lead support to the Business Transformation Officer from 2017 – 2019. She is responsible for financial and management accounting across the Group’s operations. In April 2023, Kiki was appointed as the Company Secretary.

Appointed

Kiki joined Gem Diamonds in 2010.

Current external appointments

None

Minelle Zech

X

Minelle Zech

Group Human Resources Executive

BCom HR (Potchefstroom University)

Minelle joined Gem Diamonds in 2015 as HR manager and was promoted to Group HR Executive in 2023. She has more than 20 years of HR experience and more than 10 years’ experience in the services and mining industries. She was involved in the restructuring of Avis following its acquisition by Barloworld and has extensive experience in rationalisation projects in the mining industry. At Gem, Minelle was the HR lead during its Business Transformation between 2017 and 2019, responsible for organisational health and driving the culture aspect of the programme. Minelle is responsible for all people aspects across the Group.

Appointed

Minelle joined Gem Diamonds in 2015.

Current external appointments

None


Annual Board Performance review

As per the UK Corporate Governance Code, the Board must undertake a formal and rigorous annual evaluation of its own performance and that of its Committees and individual Directors.

In 2024 the Nominations Committee initiated an internal review, which was facilitated by the Company Secretary.

The main objectives were to review the effectiveness of the Board in line with the requirements of the Code, to assess the Board’s progress and to identify possible areas of opportunity for its further development.

The review took the form of a questionnaire completed by each of the Directors. The topics of the questionnaires included:

  • Board composition, Responsibilities and Roles
  • Decision-making
  • Crisis management
  • Board meetings
  • The Role of the Chair
  • Strategy
  • Management Information and Reporting
  • Risk Management
  • Training, Development and Succession
  • Committee Structure
  • Stakeholder and Workforce Engagement
  • ESG Matters
  • Individual Performance
  • Open ended questions relating to the Company's strategy, objectives and challenges.

The findings were consolidated into a report which, along with recommendations, was circulated to all Directors and discussed at the March 2025 Board meeting. The overall findings from the evaluation were positive, with a number of recommendations made to consider Board age and gender diversity, enhancing individual performance feedback between the Chairperson and other members of the Board, enhancing communication between the workforce and the Board, review of the range and size of the Committee structures and a further refinement of the strategy.

In 2025, the Board and Committees will implement the recommendations from the performance review and monitor its progress against these over the following months. In 2025, the Nominations Committee will conduct a comprehensive external review.

Board committees

01

Audit

02

Remuneration

03

Nominations

04

Sustainability

The Audit Committee assists the Company's Board of Directors in discharging its responsibilities with regard to:

  • financial reporting;
  • external and internal audit controls, including reviewing the annual financial statements;
  • considering the scope of the Company's annual external audit and the extent of non-audit work undertaken by external auditors;
  • advising the appointment of external auditors;
  • approving the internal audit programme; and
  • reviewing the effectiveness of the Company's internal control systems.

The Audit Committee comprises three independent non-Executive directors. The Audit Committee meets formally at least three times a year and the Executive Directors are attendees to these meetings. Other senior management may be invited to attend all or part of the meetings. The external and internal Auditors attend the meetings on a regular basis.

Relations with shareholders

The Board places considerable importance on effective communication with shareholders. The Chief Executive Officer and Chief Financial Officer, assisted by the Investor Relations Officer, maintain regular dialogue with and give briefings throughout the year to analysts and institutional investors and are involved in a structured programme of investor, analyst and media visits.

Any concerns raised by a shareholder in relation to the Company and its affairs are communicated to the Board as a whole. Care is taken to ensure that any price-sensitive information is released to all shareholders, institutional and private, at the same time, in accordance with the Disclosure and Transparency Rules of the Financial Conduct Authority.

All shareholders can obtain access to the annual report and other current information about the Company through the Company’s website.

Policy on Bribery and Corruption – Zero tolerance

It has been, and continues to be, Gem Diamonds Limited’s strict policy to conduct business in an honest and ethical way and without the tolerance or use of corrupt practices or acts of bribery to obtain an advantage in, or otherwise influence, its business or relationships.

Gem Diamonds acknowledges that bribery and corruption harm the societies in which these acts are committed by preventing economic growth and development therein. Gem Diamonds is committed to acting professionally, fairly and with integrity in all its business dealings and relationships wherever it operates.

In addition to Gem Diamonds global anti-corruption policies and practices, Gem Diamonds is committed to abiding by all anti-corruption law in those jurisdictions in which it operates.

Even the suggestion of corruption may damage the reputation of Gem Diamonds and its employees or associates and affect its ability to do business. Gem Diamonds is committed to doing business ethically and transparently, even if this means a potential loss of opportunity, not using the services of particular agents or other associated persons or incurring delays or other barriers to business.

Gem Diamonds applies a “zero tolerance” approach to acts of bribery and corruption involving any of its staff or third-party representatives or associates.

Gem Diamonds’ anti-corruption policy (the “Policy”) embodies Gem’s commitment to monitor its business operations, identify any risk of corruption and effectively deal with and prevent any potential for corrupt practices. The Policy is the responsibility of the Gem Company Secretary on behalf of the Chief Executive Officer of Gem and other directors. For a copy of the Policy please apply to the Company Secretary (ir@gemdiamonds.com).

The Policy has been approved and adopted by the Board of Directors of Gem Diamonds.

Find out more

Shareholder information

Regular engagements with shareholders and other stakeholders provide relevant input for decision-making, promote the long-term sustainability of the Group and enable our contribution to wider society.

Shareholder information

Regulatory news

Our archive holds all relevant news and RNS releases as part of our listing requirements for the LSE.

Regulatory news

Corporate governance

Good governance is not dependent on laws but on the principles and qualities of those who govern them.

Corporate governance