Matthew T. Reed

Career chronology

• Through 31 October 2026: Alcoa Corporation — Executive Vice President and Chief Operations Officer. Alcoa appoints Matt Reed as EVP and Chief Operations Officer (Appointment, responsibilities and dates)

• Before joining Alcoa: OZ Minerals and SIMEC Mining — Earlier COO at OZ Minerals and SIMEC Mining, and mining executive at Arrium.. 2022 Annual Report and Sustainability Review (Management profile: Matt Reed)

Contributions and company outcomes

Q3 2026 company results

Q3 2026 · issuer reported · medium materiality

Alcoa reported third-quarter 2026 revenue of US$3.704 billion and net income attributable to the company of US$483 million, compared with US$232 million in the year-earlier quarter. Management attributes the sequential change partly to mark-to-market gains, costs and commodity prices.

Attribution: Role overlaps event; causation unproven. Company-level financial result; no executive-specific causal contribution has been established.

Relevance: Evidence of the operating and financial context, not a personal track-record attribution.

Third Quarter 2026 Results (Financial highlights and quarter discussion)

Business failures and setbacks

Arrium administration during mining leadership tenure

2016–2017 · documented · medium materiality

Arrium entered voluntary administration in April 2016 and creditors approved the sale of its steel and mining businesses to Liberty House in July 2017. OZ Minerals’ annual report records Reed held prior executive roles at Arrium; contemporaneous reporting identifies him as Arrium mining management in April 2016.

Attribution: Role overlaps event; causation unproven. Reed was a mining executive during the administration; the evidence does not establish that he caused the group insolvency.

Relevance: Relevant adverse prior-employer outcome with limited individual attribution.

2022 Annual Report and Sustainability Review (Management profile: Matt Reed); Arrium sale: creditors approve Liberty House bid (Administration and creditor-approved sale); 2015 Annual Report (Page 46, Mining Chief Executive Matthew Reed)

Industrial safety

Two Alumar workplace fatalities

July 2025 and September 2026 · issuer reported · high materiality

Alcoa reported a maintenance employee fatality at its Alumar smelter in July 2025, followed by a separate September 2026 employee death that the company determined was work-related. In October 2026 Alcoa said its internal investigation into the latter was complete while it cooperated with partner and authority investigations.

Attribution: Role overlaps event; causation unproven. The events occurred during executive tenure; sources do not establish personal fault or an individual breach.

Relevance: Material safety and operational oversight context.

Fatal Incident at Alumar (Incident statement); Statement on Alumar Fatality Investigation (14 October 2026 investigation statement)

Prominent Hill fatality shortly after OZ appointment

5 September 2021 · issuer reported · high materiality

OZ Minerals and contractor Byrnecut reported a worker was fatally injured underground at Prominent Hill on 5 September 2021; operations were temporarily suspended and South Australia Police and SafeWork SA began investigations. The 2022 annual report lists Reed as operations executive appointed 1 September 2021 and responsible for operational performance, including Prominent Hill. The later outcome of those investigations was not found.

Attribution: Role overlaps event; causation unproven. The disclosed operations role began four days earlier; no evidence establishes individual fault or that Reed caused the incident.

Relevance: Material prior-employer safety outcome, qualified by very short tenure at the time.

Prominent Hill incident notification (6 September 2021 incident announcement); 2022 Annual Report and Sustainability Review (2022 management profile, Matt Reed appointment and scope)

2018 Tahmoor shaft incident at SIMEC Mining

5 September 2018 · documented · medium materiality

At SIMEC Mining’s Tahmoor colliery, two workers were trapped in a shaft conveyance on 5 September 2018 and rescued around nine hours later. The NSW Resources Regulator issued a causal investigation describing mechanical causes and safety lessons.

Attribution: Role overlaps event; causation unproven. Reed was SIMEC Mining COO during the period according to Alcoa, but the reviewed records do not establish his personal role in the incident.

Relevance: Prior-employer safety and operational oversight context.

Causal investigation: Workers trapped in shaft winder (Pages 5–6, incident and rescue); Alcoa appoints Matt Reed as EVP and Chief Operations Officer (Prior SIMEC Mining COO role)

Environmental record

Huntly clearing undertakings and regulatory transition

Clearing 2019–2025; regulatory actions 2026 · documented · high materiality

The Australian federal government reported A$55 million in enforceable undertakings relating to historical Huntly land clearing. The minister explicitly said this was not a court-imposed penalty. On 29 October 2026 the WA government announced tighter conditions under a transitional framework while the independent EPA assessment continued.

Attribution: Role overlaps event; causation unproven. Roles overlap part of the period; no individual participation in, or personal responsibility for, the clearing was established.

Relevance: Material evidence of permitting and environmental management risk.

Interview with Oliver Peterson (Minister response on undertakings and non-court characterization); State Government strengthens regulatory arrangements for Alcoa (29 October 2026 conditions and independent assessment)

Suitability for the current role

Experience and present responsibilities

Current at cutoff · analyst inference · low materiality

Analyst inference: Matthew T. Reed has documented experience relevant to executive vice president and chief operations officer. Earlier COO at OZ Minerals and SIMEC Mining, and mining executive at Arrium. This documents experience, not a verified individual operating result.

Attribution: Responsibility not applicable. Role-fit judgment based on issuer and dated professional records; it is not a finding of personal performance.

Relevance: Relevant to the stated role; career and contribution evidence varies by person.

Alcoa appoints Matt Reed as EVP and Chief Operations Officer (Appointment, responsibilities and dates); 2022 Annual Report and Sustainability Review (Management profile: Matt Reed)

Evidence gaps

• Credential and professional licence claims have not been independently verified with awarding or licensing bodies.

• This is limited public-source screening; full prior-employer incident, litigation and regulator records were not obtained, and no personal clearance is inferred.

• Individual contribution to aggregate company results is not established.

• Independent records establishing Reed’s individual responsibility, if any, for the Arrium collapse were not found.

• The underlying partner and regulatory investigation reports into the 2025 and 2026 Alumar deaths were not obtained.

• No final police or SafeWork SA investigation outcome for the 5 September 2021 Prominent Hill fatality was obtained.

• This report is a preliminary screening: nine topic rows include reused combined and company-level searches. They are not nine separate person-specific searches and do not establish comprehensive prior-employer diligence.

• Prior-employer searches focused on selected Arrium, OZ Minerals and SIMEC events; other employers and remaining incidents were not comprehensively screened.