Marnie Finlayson

Career chronology

• Since 2025-12-01: DevEx Resources Limited — Managing Director. Investor Presentation September 2026 (Management Team / corporate directory; named role as at 2026-09-26)

• Prior to DevEx: Rio Tinto — Senior leadership and operational roles over 17 years. DevEx Appoints Marnie Finlayson as Managing Director (DevEx Appoints Marnie Finlayson as Managing Director: profile / appointment biography)

• Most recent prior role: Rio Tinto Battery Materials — Managing Director. DevEx Appoints Marnie Finlayson as Managing Director (DevEx Appoints Marnie Finlayson as Managing Director: profile / appointment biography)

• Earlier senior role: Rio Tinto Borates & Lithium — Managing Director. DevEx Appoints Marnie Finlayson as Managing Director (DevEx Appoints Marnie Finlayson as Managing Director: profile / appointment biography)

• Appointed 1 December 2025: DevEx Resources — Managing Director. Half-Year Report 31 December 2025 (Directors’ report; appointment date)

Contributions and company outcomes

AGE acquisition completed for cash

2026-06-29 · issuer reported · medium materiality

The issuer reported age acquisition completed for cash: True. This records an employer-level event; the reviewed evidence does not attribute the event to Marnie Finlayson individually.

Attribution: Role overlaps event; causation unproven. The event occurred at the issuer level during the documented period; no source establishes this executive’s individual contribution or causal responsibility.

Relevance: Context for delivery and oversight in the current role; do not treat it as personal performance evidence.

DevEx Completes Acquisition of AGE's Uranium Tenure in NT (p. 1)

Suitability for the current role

Role fit cannot be assessed from the disclosed profile

As of 2026-09-26 · analyst inference · low materiality

The current role is supported by the issuer roster, and the cited profile documents relevant previous roles for Marnie Finlayson. Those biographies are largely issuer supplied and lack complete dated chronology or independent performance corroboration, so fit can be assessed only in relation to the disclosed prior experience.

Attribution: Responsibility not applicable. This is an evidence-limited analyst judgment, not an adverse claim about the executive.

Relevance: Role-specific experience and credentials are central to assessing the current position; the available record is insufficient for a positive or negative conclusion.

Investor Presentation September 2026 (Management Team / corporate directory; named role as at 2026-09-26); DevEx Appoints Marnie Finlayson as Managing Director (DevEx Appoints Marnie Finlayson as Managing Director: executive biography)

Evidence gaps

• Targeted independent searches of regulator, court, safety and environmental records were not completed for this individual; the logged source review does not support a clearance conclusion.

• The company profile summarizes Finlayson’s Rio Tinto Battery Materials leadership and Northern Star board service but does not provide detailed dates or independently measured results from those roles; the six-person targeted search found no specific regulator/court lead but is not a full prior-employer audit.