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2026-11-06

← ARR management

Full background report

Mark Wall

Chief Executive Officer / President

Career chronology

Contributions and company outcomes

Halleck Creek technical advancement remains pre-production

December 2025–September 2026 · issuer reported · high materiality

ARR reported mixed rare earth oxide production from test work in the December 2025 quarter, before this executive joined; in the September 2026 quarter it reported completing feasibility-stage drilling and commencing ore crushing for its pilot program. No operating mine or commercial production has been delivered.

Attribution: Responsibility not applicable. The 2025 milestone predates the executive’s appointment; subsequent issuer-reported company work is not individually attributed.

Relevance: Relevant to project execution; progress remains at study/pilot stage.

Quarterly Activities and Appendix 5B for September 2026 (pp. 1–3, September quarter operational update); Quarterly activities for December 2025 (pp. 1–2, mixed oxide test work)

Business failures and setbacks

Development-stage losses and no producing operation

Through 30 June 2026 · issuer reported · medium materiality

ARR remains a pre-revenue rare earth developer with no operating mine; financial reports describe continued exploration, studies, processing test work and capital needs. This is a company-stage limitation, not evidence of personal failure.

Attribution: Role overlaps event; causation unproven. Company performance overlaps current tenure for some executives; no individual causation demonstrated.

Relevance: Material context for delivery track record and capital stewardship.

Annual Report to shareholders, year ended 30 June 2025 (financial statements and going-concern/project sections); Half Yearly Report and Accounts, six months ended 31 December 2025 (financial statements and operations); Quarterly Activities Report for period ended 30 June 2026 (quarterly activities and cashflow)

Prior diamond-company losses during CEO tenure

Q3 2025 · documented · high materiality

Mountain Province reported a C$55.9 million net loss in Q3 2025 versus C$19.0 million in Q3 2024. It cited softer rough-diamond sales, operating grade effects and foreign exchange; it reported Q3 2025 revenue C$29.2 million versus C$69.4 million a year earlier.

Attribution: Role overlaps event; causation unproven. Wall was CEO during the period; the mine was operated by a joint venture and the figures reflect market and other factors. No personal causation is established.

Relevance: Financial and operating context for a senior mining leadership record.

Mark Wall executive profile (identity linkage); Mountain Province appoints Mark Wall (CEO appointment); Mountain Province third quarter 2025 financial results (financial and operating highlights)

Environmental record

Veladero incident and subsequent management role

September 2016–2017 · documented · high materiality

At Veladero, Barrick reported a September 2016 release of ore saturated with process solution and a temporary suspension. Contemporary reporting says Mark Wall was appointed interim general manager after that incident. Barrick reported a later administrative fine encompassing the September 2016 and March 2017 incidents; it stated material from the 2016 incident was contained on site and its monitoring found no environmental impact.

Attribution: Employer context; no individual link established. The September 2016 event preceded Wall’s interim appointment according to contemporary reporting. His exact end date and his responsibility for any later incident are not established; neither culpability nor environmental clearance is inferred.

Relevance: Relevant context for prior operating and environmental oversight; timing is material.

Mark Wall executive profile (identity linkage); Inquietud por un nuevo derrame de cianuro de la Barrick en San Juan (appointment following September event); Barrick Gold 2017 annual financial report (Veladero incidents and regulatory proceeding); Former colleague account of Barrick and ARR CEO (colleague identifies ARR CEO with Barrick Veladero team); Veladero incident and interim management change (16 September 2016, appointment after incident)

Suitability for the current role

Background relevant to current remit

Career through cutoff · analyst inference · medium materiality

An executive profile links ARR’s CEO to Mountain Province Diamonds’ 2021–2025 CEO Mark Wall; a former Barrick colleague also identifies ARR’s CEO as his former teammate. The former issuer reports leadership at Barrick, Nevada Copper and Streamers Gold, and lists business and management degrees and a minerals-processing diploma; independent credential checks remain unavailable. ARR’s annual report says his employment began on 22 December 2025, while the appointment release says the CEO role was effective 5 January 2026.

Attribution: Responsibility not applicable. Issuer biography/appointment material provides this background; independent qualification and career verification are incomplete.

Relevance: Relevant to current role, with depth varying by available published evidence.

Mark Wall executive profile (profile linking ARR and Mountain Province); Mountain Province appoints Mark Wall (career and appointment); 2024 Annual Information Form (p. 33, qualifications and career); Appointment of Mark Wall as Chief Executive Officer (effective date); 2026 Annual Report (remuneration report, CEO appointment date); Former colleague account of Barrick and ARR CEO (colleague identity corroboration)

Evidence gaps

  • ARR’s published CEO announcement does not identify his earlier employers by name; the link to Mountain Province relies on a secondary profile, supported by the consistent role history and dates.

  • Degree awarding institutions and independent credentials were not identified.

  • Exact Veladero operating end date and final proceedings specific to the 2016/2017 incidents were not established.

  • Open-source screening is not an exhaustive criminal, sanctions, litigation, regulatory or credential check.