2025 Modern Slavery Statement (fy25 a3 modern slavery statement revision v1)

Modern Slavery Statement

FY25

FY25 Annual Reporting Suite

This Modern Slavery Statement (Statement) has been prepared by Northern Star Resources Ltd ABN 43 092 832 892 (Northern Star) to meet the requirements of the Australian Modern Slavery Act 2018 (Cth) for the financial year ending 30 June 2025 (FY25).

Unless expressly stated otherwise, all references to 'our', 'we', 'us', the Company or Northern Star refer to the Group, as detailed on pages 16 and 17 in Our Corporate Structure. Please refer to the Glossary for the definitions of the capitalised terms used in this Statement.

The percentage figures disclosed in this Statement are subject to rounding and may not add to 100%. The full 2025 Annual Reporting Suite is available at https://www.nsrltd.com

Table of Contents

FY25 Annual Report

FY25 ESR

Reporting Suite

FY25 Corporate Governance Statement

FY25 Modern Slavery Statement

Highlights 4

Message from the Chair of the ESS Committee 4

This Statement 6

Mandatory criteria 7

Our modern slavery risks 24

Collaboration & engagement 26

Training & awareness 27

Risk identification and assessment 28

Supplier due diligence 30

Acknowledgement of Country

Northern Star would like to acknowledge and pay our respects to Traditional Owner groups, upon whose land in Australia we are privileged to work on.

• Darlot

• Kakarra

• Kariyarra

• Kariyarra Pirnthurruna

• Kultju

• Marlinyu Ghoorlie

• Ngarla

• Ngarluma

• Ngarluma (Mallina)

• Nyalpa Pirniku

• Nyamal

• Tjiwarl

• Wajarri Yamatji

• Warlpiri, Gurindji and Jaru

• Whadjuk Noongar

• the Wiluna Martu

• Yinhawangka

Northern Star would like to acknowledge and pay our respects to the Athabascan people, upon whose ancestral lands our Pogo Operation in Alaska, is situated.

We seek and value the guidance and input of these indigenous groups in the operation of our business. We acknowledge their strong and special physical and cultural connections to their

Consultation with Group entities 7

Our progress 9

Our Company 10

Our Purpose 11

Our STARR Core Values 11

Our workforce 12

Our Operations 13

Our corporate structure 16

Our supply chain 18

Modern slavery risk 20

Corporate governance 21

Policies & frameworks 22

Grievance mechanisms

& remediation 23

Case Study: Ongoing renewable

energy supply chain assessment 33

Case Study: Supplier refusal to audit termination 34

ancestral lands and pay our respects to their Elders, past and present. Cover Photo: Anna Tetley - Environmental Advisor

Jundee Operations

Yandal Production Centre, Western Australia

Highlights

87%

of key accountable

Introduction

Introduction

Message from the Chair of the ESS Committee

Thunderbox Operations Yandal Production Centre, Western Australia

employees have completed awareness training.1

100%

Completion

of our awareness training by the leadership team and all our Non-Executive Directors.

Tier 3

supplier SAQ pilot process completed. See case study page 33.

0

whistleblower reports related to modern slavery or other human rights abuses.

13

audits2 completed on our Tier 1 suppliers' practices.

I am pleased to present Northern Star's FY25 Modern Slavery Statement, which outlines our ongoing commitment to mitigating the risks of modern slavery across our Operations and supply chains.

We are proud of the progress we have made this year, including: conducting a coprehensive review of our supplier data and analysis processes, achieving a high compliance rate for our modern slavery awareness training among all required employees, and further strengthening our overall risk management approach to modern slavery.

In FY25, we focused on deepening our understanding of modern slavery risks within our supply chains. Notably, we continued a detailed assessment of Tier 2 and Tier 3 suppliers within

the supply chain of our Tier 1 solar panel supplier, our FY24 case study.

This year, we expanded our work to include a full Self-Assessment Questionnaire (SAQ) process for selected Tier 3 suppliers identified during our FY24 supply chain mapping project.

We collaborated closely with both Tier 1 and Tier 2 suppliers to uncover and address potential risks. Through this process, we gained valuable insights that we and our suppliers will apply across broader areas of our supply chain in the future.

While we did not identify any confirmed instances of modern slavery in FY25, we responded to a report concerning one of our

suppliers potentially in breach of our Supplier Code of Conduct procedure regarding modern slavery. We

implemented our full modern slavery due diligence process and used this case to identify areas for improvement in our processes, which we plan to address in FY26. In an effort to try

to ensure that human rights are not violated by suppliers in our supply chain, it is important to Northern Star to continue to try to engage with suppliers who attempt to disengage as a result of Modern Slavery concerns being raised with them.

We recognise that continuous improvement is essential to achieving meaningful and lasting impact. We remain supportive of the Australian Government's efforts to strengthen the Modern Slavery Act 2018 (Cth).

Looking ahead to FY26, we will prioritise improving supplier response rates to due diligence activities, enhancing the accuracy of risk identification through deeper supply chain analysis, and continuing to assess the effectiveness of our actions.

Chair - Environmental, Social & Safety Committee

Northern Star Resources Ltd

20 August 2025

1 The total number of key accountable employees at 30 June 2025 is 368.

2 Audits completed in FY25 were both initial supplier audits and follow-up audits of CAPs issued.

4 5

About this Statement

About this Statement

Consultation with Group entities

This Statement has been approved for release by the Northern Star Board of Directors and is current as at 20 August 2025. The Statement is a joint statement by Northern Star for itself and all of its wholly owned

subsidiaries (the reporting entity), in accordance with section 14(2)(d)(ii) of the Act.

Northern Star prepared this Statement in consultation with each other reporting entity that this Statement covers (all of which have three common directors with Northern Star), in accordance with section 14(2)(c) of the Act. Consultation

was undertaken by our Group-wide Modern Slavery Working Group, which comprises members

of the Legal, Company Secretarial and ESG Engagement teams, who engaged with key areas of the business (including human resources, procurement, and community).The

Statement was approved by the Board following recommendations by the Environmental, Social & Safety (ESS) Committee.

This Statement

As prescribed by the Act, this Statement covers:

• reporting entities covered by this Statement;

• company structure, operations and supply chain;

• modern slavery risks in our Operations and supply chain;

• actions we have taken to assess and address those risks, including audits and corrective actions;

• how we assess the effectiveness of such actions;

• how we consult with our subsidiary entities; and

• other information we consider relevant regarding our efforts to combat modern slavery in our Operations and supply chains.

This Statement is available on our website at: www.nsrltd.com and via the Australian Government's Online Register of Modern Slavery Statements at www.modernslaveryregister.gov.au.

20 August 2025

Mandatory criteria

This table outlines where the mandatory reporting criteria required by the Act have been addressed in this Statement:

Jundee Operations

Yandal Production Centre, Western Australia

6

Northern Star Resources Ltd FY25 Modern Slavery Statement 7

Introduction

Our progress

Northern Star is committed to continuous improvement in all aspects of our business Operations, and this extends to our commitment to take meaningful steps to identify and mitigate modern slavery risks and maintain responsible and transparent supply chains.

100

100% completion of our modern slavery awareness training by the leadership team and all our Non-Executive Directors.

Progress against the planned actions in FY25 committed to in our FY24 Statement is shown below:

Complete

See Training & awareness on page 27 for more detail.

Complete

100

100•

Complete

Complete

Complete

Complete

Complete

9

Refresh our Inherent Risk Assessment across all Tier 1 suppliers, to ensure the most up to date product and country risk profiles are considered.

See Audit and corrective action plans page 32.

100

Audit at least four Tier 1 suppliers who are labour hire companies and long-term contractors providing services to Northern Star against governance aspects within the Supplier Code

of Conduct and confirm progress against any corrective action plans issued.

See Inherent risk page 30 for more detail.

Set goals for effectiveness, where applicable, and measure our performance against the key performance metrics detailed in Table 8.

See Table 8 page 37 for FY25 goals.

100

Assess and enforce our Supplier Refusal to SAQ3 Procedure in relation to continued non-responses or refusal to complete SAQs.

See SAQ page 31 for more detail.

100

Utilising vendor management software to achieve enhanced assessment of ESG performance by our Tier 1 suppliers when awarding contracts via the tender process.

100

Complete supply chain mapping of our Tier 3 suppliers in the Jundee FY24 pilot assessment and investigate the modern slavery risk via a detailed SAQ process on a selection of ten of these suppliers.

See Supply chain risk page 25 for more details.

See case study provided on page 33 for more detail.

8 Northern Star Resources Ltd FY25 Modern Slavery Statement

Pogo Operations Pogo Production Centre, Alaska

3 Supplier's own self-assessment questionaire.