Henk Diederichs

Career chronology

• Effective 1 February 2026; current.: Wia Gold Limited — Managing Director and Chief Executive Officer. Wia appoints Managing Director and Chief Executive Officer (Appointment date); 2026 Annual Report (p. 9)

• COO through appointment to WIA; exact start date not established.: Predictive Discovery Limited — Chief Operating Officer. Wia appoints Managing Director and Chief Executive Officer (Recent role); Annual Report FY2025 (MD report, p. 12)

• Joined late 2016; returned as COO October 2021; CEO/MD from 16 November 2022 through OreCorp acquisition in April 2024.: OreCorp Limited — VP Project Development; COO; CEO and Managing Director. Appointment of Chief Operating Officer (Career dates); OreCorp positions Board and senior management for Nyanzaga development (CEO/MD appointment); Annual Report for year ended 30 June 2023 (p. 14); Wia appoints Managing Director and Chief Executive Officer (Prior tenure)

• Before return to OreCorp as COO in October 2021; exact dates unknown.: Allied Gold Corp. — Senior Vice President, Operations. Appointment of Chief Operating Officer (Immediately preceding role)

• OreCorp says he was integral to Lumwana development and operations during 2006-2012; exact title unknown.: Equinox Minerals Limited — Mine/project development and operations roles. Appointment of Chief Operating Officer (Equinox/Lumwana experience)

Education and qualifications

Mechanical engineering and AusIMM membership

2022-2023 issuer disclosures · issuer reported · low materiality

OreCorp reports that Henk holds a mechanical-engineering degree and is a member of AusIMM. The awarding institution and independent credential verification are not established in the reviewed primary records.

Attribution: Individual involvement documented. OreCorp identifies the credential; no register verification was completed.

Relevance: Relevant to technical and development leadership.

OreCorp positions Board and senior management for Nyanzaga development (Appointment release, qualification); Annual Report for year ended 30 June 2023 (Directors' report, biography)

Personal achievements

Led PDI Bankan DFS delivery

DFS released June 2025 · issuer reported · medium materiality

PDI's FY2025 report credits Henk, as COO, with leading Bankan DFS delivery alongside its broader project and technical teams. The DFS is a study and its production and returns are forecasts; no mine was operating by the cutoff.

Attribution: Individual involvement documented. PDI directly credits his leadership but describes team delivery; no sole contribution or operating outcome is established.

Relevance: Relevant prior project-study delivery experience.

Annual Report FY2025 (MD report, p. 12)

Contributions and company outcomes

Nyanzaga advanced during OreCorp executive tenure

Late 2016-April 2024 · issuer reported · medium materiality

OreCorp filings document Henk's VP Project Development, COO and CEO/MD roles, and advancement of Nyanzaga through scoping and prefeasibility. WIA says his CEO tenure ended with OreCorp's acquisition by Perseus in April 2024. The sources do not isolate his contribution to sale terms, valuation or shareholder return; the project had not reached production in the reviewed evidence.

Attribution: Role overlaps event; causation unproven. His roles overlapped project advancement and the company acquisition, but sole responsibility is not shown.

Relevance: Relevant project development and transaction exposure; not a commissioning record.

Appointment of Chief Operating Officer (Career and Nyanzaga history); Annual Report for year ended 30 June 2023 (p. 14); Wia appoints Managing Director and Chief Executive Officer (Prior OreCorp tenure)

Kokoseb DFS and reserve milestone during WIA tenure

FY2026; DFS August 2026 · issuer reported · medium materiality

WIA's 2026 annual report records completion of the Kokoseb DFS in August 2026 and a 1.95 Moz reserve, alongside funding steps toward construction. The milestone occurred during Henk's CEO tenure, but his individual contribution is not isolated. Construction and production remained future plans.

Attribution: Role overlaps event; causation unproven. His CEO tenure overlapped the milestone; no individual causal contribution or operating result is established.

Relevance: Highly relevant, though the project remained pre-production.

2026 Annual Report (pp. 5-9, DFS, reserve and financing)

Suitability for the current role

Mine development and operations background

Through 2026-11-02 · analyst inference · medium materiality

The selected roster identifies Henk as WIA MD/CEO from 1 February 2026. WIA and OreCorp records document senior project and operations roles at PDI, OreCorp, Allied Gold and Equinox; exact Allied Gold dates and some Equinox titles remain unresolved.

Attribution: Responsibility not applicable. Role-fit judgment based on selected roster and employer records, not a complete employment audit.

Relevance: Relevant to WIA's pre-construction development mandate.

2026 Annual Report (p. 9, appointment/biography); Wia appoints Managing Director and Chief Executive Officer (Appointment announcement); Annual Report for year ended 30 June 2023 (Directors' report, p. 14)

Evidence gaps

• Exact Allied Gold dates and some Equinox titles are unresolved; no independent employment or credential-register check was completed.

• Bankan and Kokoseb DFS findings are study-stage outcomes; they do not evidence construction, commissioning or production by Henk.

• Public-source searches are not exhaustive criminal, sanctions, litigation, safety or environmental checks.