Sibanye Stillwater : ICMM self-assessment for 2023

GROUP

SUPPLEMENTARY INFORMATION 2023

SIBANYE-STILLWATER'S ICMM SELF-ASSESSMENT

FOR THE YEAR THAT ENDED 31 DECEMBER 2023

The ICMM (International Council on Mining and Metals) is an industry body that plays a global leadership role in sustainable development. Its membership includes one third of the global metals and mining industry. The ICMM is dedicated to leadership, action and innovation for a safe, just and sustainable world. Membership of the ICMM entails an active role in building a safer and more sustainable mining and metals industry.

Sibanye-Stillwater joined as an ICMM member in February 2020.

The ICMM has five subject matters as part of its Assurance and Validation Procedure to confirm members are implementing their mining principles and performance expectations (PEs).

Subject matter 1: A description of how the company has aligned its policies, management standards, and procedures with the ICMM Principles and relevant PEs, and any mandatory requirements set out in ICMM Position Statements.

Subject matter 2: Document the review process of sustainability risks and opportunities, taking stakeholder expectations into account. The company's material sustainability risks

and opportunities based on its own review of the business and the views and expectations of its stakeholders (in line with Global Reporting Index, GRI, requirements).

Subject matter 3: Provide detail about systems and approaches in managing risks and opportunities. Member companies can choose a specific risk; ours is managing workplace safety.

Subject matter 4: Reported performance (during the reporting period) for the identified risk (workplace safety).

Subject matter 5: Disclosures regarding the company's prioritisation process for selecting which assets to put forward for third-party PE validation, an ICMM requirement.

Our response to the Assurance and Validation Procedure's subject matters:

Subject matter 1: We have updated our policies and position statements for the Group as per the ICMM requirements. These can be viewed at www.sibanyestillwater.com/sustainability/ reports-policies/.

Subject matter 2: We include a table for "accountability, governance, and assurance" in each chapter of the performance section of our Integrated report. We also conducted a materiality workshop to determine material matters, which takes into account stakeholder expectations and includes independent consultants. See Our material matters, page 3, and 287-288.

Subject matter 3: Our risk process takes the ICMM's Mining Principles into account, and

is explained in Managing our risks and opportunities within the external operating environment, page 51. Other sustainability-relatedrisk discussions are included in, Continuous safe production, page 125, Health, wellbeing and occupational hygiene, page 136, Socioeconomic development, page 213, and Minimising our environmental impact, page 186, amongst others.

Subject matter 4: Refer to the KPMG assurance statement, page 285, on the related performance indicators that have been assured.

Subject matter 5: Sibanye-Stillwater's production split is the main factor for determining the Group's prioritisation for selecting appropriate assets to be third-party PE validated. Further to this, our Southern African operations account for the majority of ounces produced and account for most of the workforce employed. The SA region concluded its self-assessment and third-party validations in a previous reporting cycle; the US region completed its self-assessment and third- party validation in this reporting cycle. We will stagger self-assessment/third-party validation for newly acquired operations over the next two years.

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See Corporate governance: page 8, 272.

See Governance in sustainability: our considered decision-making:page 229.

Applicable: Corporate

The Group executive and C-suite,through its ESG sub-committee,has oversight and accountability. Furthermore, the Board, through its Social, Ethics and Sustainability Committee, sets the agenda and performance expectations for the ESG Committee to report back on.

1.4 Assign accountability for sustainability performance at the Board and/or Executive Committee level.

The updated policies, position statements and Code of ethics can be found atwww.sibanyestillwater.com/sustainability/reports-policies/

Applicable: Corporate

The sustainability related policies, available on our website, incorporate ICMM requirements.

Sibanye-Stillwateris reviewing the supporting position statements, where applicable, that set out the technical detail on commitments relevant to ESG policy, ensuring proper consideration of newly acquired operating environments.

1.3 Implement policies and standards consistent with the ICMM policy framework.

Facilitation payments are addressed within the Code of ethics. Seewww.sibanyestillwater.com/about-us/governance/

Applicable: Corporate and Asset

Our iCARES values inform the Group's culture and leadership behaviour, providing a principled basis for the way the Group does business. See Our purpose, vision, strategy and values page 34.

Our Code of ethics requires the reporting of contraventions and non-compliancewith relevant legislation and regulation. It outlines our approach to ethical business practices, which includes encouragement to make use of toll-freelines for reporting unethical behaviour, available for all operations. Our Board has approved our Anti- corruption and bribery policy to further strengthen our commitments. See Corporate governance, page 20.

Applicable: Corporate and Asset

1.2 Implement policies and practices to prevent bribery, corruption and publicly disclose facilitation payments.

Sibanye-Stillwaterdoes not tolerate regulatory non-compliance;compliance is overseen by dedicated compliance officers at our operations. See Corporate governance, pages 19 - 33.

1.1 Establish systems to maintain compliance with applicable law.

GROUP

SUPPLEMENTARY INFORMATION 2023

Below is a summary of our corporate and asset level performance against the ICMM Principles and performance expectations:

Meets

Partially meets

N/A

Assessment summary

Principle 1: Apply ethical business practices and sound systems of corporate governance and transparency to support sustainable development

Corporate

EU

AUS

Comments and reference to the Integrated report, 2023

Performance expectations

SA PGM

SA gold

US PGM

2

GROUP

SUPPLEMENTARY INFORMATION 2023

Meets

Partially meets

N/A

Assessment summary

Principle 1: Apply ethical business practices and sound systems of corporate governance and transparency to support sustainable development continued

Corporate

EU

AUS

Comments and reference to the Integrated report, 2023

Performance expectations

SA PGM

SA gold

US PGM

1.5 Disclose the value and beneficiaries

Donations of any amount to local or national governments, political parties, politicians,

of financial and in-kind political

or their affiliates is prohibited without the prior consultation and approval as required

contributions whether directly

by the Group. In Q1 2023, New Century Resources contributed AUS$14,300 to the

or through an intermediary.

Liberal Party of Tasmania for membership of the Leaders Forum Program for CY2023.

Applicable: Corporate

This is a legacy contribution that was entered into prior to the takeover of New Century

Resources by Sibanye-Stillwater. In line with Sibanye-Stillwater's policy on donations

and sponsorships, participation in the Leaders Forum Program will not be renewed

beyond CY2023.

See Corporate governance, page 21.

Principle 2: Integrate sustainable development in corporate strategy and decision-making processes

Corporate

EU

AUS

Comments and reference to the Integrated report, 2023

Performance expectations

SA PGM

SA gold

US PGM

2.1 Integrate sustainable development

Our three-dimensional strategy defines ESG as a strategic essential, with strategic

principles into corporate strategy

differentiators integrating sustainable development principles for the long-term.

and decision-making processes relating

See Unpacking our three-dimensional strategy, page 48.

to investments and in the design,

operation and closure of facilities.

See Our sustainability strategy: a summary, page 185.

Applicable: Corporate

2.2 Support the adoption of responsible health and safety, environmental, human rights and labour policies and practices by joint venture partners, suppliers and contractors, based on risk.

Applicable: Corporate and Asset

Not yet	Not yet
determined	determined

During 2023, the attention shifted to supplier verifications; 50 suppliers in the SA region's supply chain were checked against our ESG requirements. Sibanye-Stillwater hosts an annual supplier day, informing suppliers about our ESG requirements.

Our responsible sourcing practices remain intact and are overseen by a Responsible sourcing committee.

An online training video on our ethical practices is available to suppliers. This year we made available the United Nations Global Compact's free sustainability courses to suppliers.

Suppliers, business partners and contractors must adhere to our Group policies and practices as stipulated in our business contracts with them.

Our internal audit department noted that the US must review its contractor management processes to ensure alignment to the ICMM requirements.

Action: the US region's contractor management policy, and Stillwater and East Boulder transport policies will be reviewed and updated to accord with the ICMM guidelines.

Due date: 30 June 2024

3

GROUP

SUPPLEMENTARY INFORMATION 2023

Meets

Partially meets

N/A

Assessment summary

Principle 3: Respect human rights and the interests, cultures, customs and values of employees and communities affected by our activities

Corporate

EU

AUS

Comments and reference to the Integrated report, 2023

Performance expectations

SA PGM

SA gold

US PGM

3.1 Support the UN Guiding Principles

Not yet

Not yet

A human rights due diligence (HRDD), by an independent third party, was performed

on Business and Human Rights by

determined

determined

for the SA and US operations. The methodology of this HRDD considered the UN

developing a policy commitment

Guiding Principles on Business and Human Rights.

to respect human rights, undertaking

human rights due diligence and

providing for or cooperating in

processes to enable the remediation

of adverse human rights impacts that

members have caused or

contributed to.

Applicable: Corporate and Asset

3.2 Avoid the involuntary physical or

Not yet

Not yet

Indigenous people and Heritage position statements and ESG policy available at

economic displacement of families

determined

determined

www.sibanyestillwater.com/sustainability/reports-policies/

and communities. Where this is not

A Social performance toolkit is available, and it provides guidance in respect of

possible, apply the mitigation hierarchy

and implement actions or remedies that

resettlement practices.

address residual adverse effects to

The National Historic Preservation Act (NHPA) requires US federal agencies to consider

restore or improve livelihoods and

effects of federal actions on cultural resources, including traditional cultural properties

standards of living of displaced people.

eligible for, or listed in, the National Register of Historic Places, and to consult with

Applicable: Asset

American Indian tribes to identify and resolve adverse effects. Whenever a new

action is proposed at the US operations, an environmental assessment is completed by federal and state agencies that includes consultation with American Indian tribes regarding cultural resources that would potentially be affected by the proposed action.

3.3 Implement, based on risk, a human rights and security approach consistent with the Voluntary Principles on Security and Human Rights.

Applicable: Asset

Not yet	Not yet	Sibanye-Stillwater's Protection services policies and procedures align to the Voluntary
determined	determined	Principles on Security and Human Rights.
		See Socioeconomic development, page 227.

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Applicable: Asset

3.7 Work to obtain the free, prior and informed consent of Indigenous Peoples where significant adverse impacts are likely to occur, as a result of relocation, disturbance of lands and territories or of critical cultural heritage, and capture the outcomes of engagement and consent processes in agreements.

GROUP

SUPPLEMENTARY INFORMATION 2023

Meets

Partially meets

N/A

Assessment summary

Principle 3: Respect human rights and the interests, cultures, customs and values of employees and communities affected by our activities continued

Corporate

EU

AUS

Comments and reference to the Integrated report, 2023

Performance expectations

SA PGM

SA gold

US PGM

3.4 Respect the rights of workers by not		Our Human rights policy stipulates our commitment to not employing children,
employing child labour or forced		committing to respecting freedom of association and collective bargaining.
labour; avoiding human trafficking; not		Grievance mechanisms are in place.
assigning hazardous/dangerous work to
those under 18; eliminating all forms of		See Engaging with our stakeholders, page 78,Empowering our workforce, page 156
harassment and discrimination;		and Socioeconomic development, page 226.
respecting freedom of association and
collective bargaining; and providing an
appropriate mechanism to address
workers grievances.
Applicable: Corporate and Asset
3.5 Equitably remunerate employees with		Our employees' remuneration exceeds legal requirements and represents a
wages that equal or exceed legal		competitive wage. Overtime is managed as per the required legal limits.
requirements or represent a competitive		See Empowering our workforce, page 164 and Remuneration report, page 255.
wage within that job market (whichever
is higher) and assign regular and
overtime working hours within legally
required limits.
Applicable: Corporate and Asset
3.6 Respect the rights, interests, aspirations,	Not yet	Refer to our Indigenous people position statement and Heritage position statement,
culture and natural resource-based	determined	www.sibanyestillwater.com/sustainability/reports-policies/
livelihoods of Indigenous Peoples in		Our Australian operations have maintained their commitment and obligations within
project design, development and
operation; apply the mitigation		the Gulf communities agreement, ensuring that benefits of the Century operations are
hierarchy to address adverse impacts		shared with traditional owners of the lands and waters.
and; deliver sustainable benefits for		The American Indian Religious Freedom Act (AIRFA) grants American Indians, Eskimos,
Indigenous Peoples.
	Aleuts, and Native Hawaiians freedom to believe, express, and exercise their
Applicable: Asset
	traditional religions.
	Not yet	Our commitment to free, prior and informed consent is included in our ESG policy
	determined	available at www.sibanyestillwater.com/sustainability/reports-policies/.

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Principle 4: Implement effective risk-managementstrategies and systems based on sound science and which account for stakeholder perceptions of risks

Position statement in place in respect of indigenous peoples. A heritage procedure is available and grievance procedure is in place.

Sibanye-Stillwaterremains committed to creating a diverse workforce. Our Women of Sibanye-Stillwater(WoSS) initiative in the SA and US regions addresses inequalities and barriers faced by women in the workplace, and is aimed at ensuring fair treatment of women across the organisation.

Position statement on diversity, equity and inclusion

Applicable: Corporate and Asset

Position statement on mining and indigenous people

Culture initiatives are continuing to foster a culture that respects the rights and interests of all workers.

See Empowering our workforce, page 151.

Not yet determined

3.9 Implement policies and practices to respect the rights and interests of all workers and improve workforce representation in the workplace so it is more inclusive.

A series of transformative workshops took place to enhance the understanding of diversity, equity and inclusion.

Applicable: Corporate and Asset

See Empowering our workforce, page 156.

Not yet determined

3.8 Implement policies and practices to respect the rights and interests of women that reflect gender-informedapproaches to work practices and job design, and that protect against all forms of discrimination and harassment, and behaviours that adversely impact on women's successful participation in the workplace.

The Group has policies and procedures aimed at increasing female representation across all levels of the organisation. Diversity, equity and inclusion is embedded in the three-dimensionalstrategy of the business as well as in the ESG scorecard forming part of the long-termincentive plans.

GROUP

SUPPLEMENTARY INFORMATION 2023

Meets

Partially meets

N/A

Assessment summary

Principle 3: Respect human rights and the interests, cultures, customs and values of employees and communities affected by our activities continued

Corporate

EU

AUS

Comments and reference to the Integrated report, 2023

Performance expectations

SA PGM

SA gold

US PGM

Corporate

EU

AUS

Comments and reference to the Integrated report, 2023

Performance expectations

SA PGM

SA gold

US PGM

4.1 Assess environmental and social risks/

Sibanye-Stillwater has a comprehensive risk management process. Risk assessments

opportunities for new projects and

are conducted per operation as well as at corporate level. Environmental and social

existing operations undergoing

risk management is integrated within the various departments and business unit risk

significant changes, in consultation

management processes.

with interested and affected

See Managing our risks and opportunities within the external operating environment,

stakeholders; publicly disclose

assessment results.

page 51.

Applicable: Corporate and Asset

The annual materiality workshop gave specific attention to ESG risks, including a focus

on the TCFD (Task Force on Climate-Related Financial Disclosures) process completed

by the Group. See Our material matters, page 3.

6

GROUP

SUPPLEMENTARY INFORMATION 2023

Meets

Partially meets

N/A

Assessment summary

Principle 4: Implement effective risk-management strategies and systems based on sound science and which account for stakeholder perceptions of risks continued

Corporate

EU

AUS

Comments and reference to the Integrated report, 2023

Performance expectations

SA PGM

SA gold

US PGM

4.2 Undertake risk-based due diligence on

Not yet

Not yet

Sibanye-Stillwater has policies and frameworks (including Human rights policy,

conflict and human rights that aligns

determined

determined

Responsible sourcing policy, Code of ethics) to ensure we align to the Organisation for

with the OECD Due Diligence Guidance

Economic Co-operation and Development's Due Diligence Guidance (OECD DDG)

on Conflict-Affected and High-Risk

for the Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk

Areas, when operating in, or sourcing

Areas. We align with requirements derived from the OECD DDG such as the London

from, a conflict-affected or high-risk

Platinum and Palladium Market's Responsible Platinum/Palladium Guidance (LPPM

area.

RPPG), the London Metal Exchange (LME) Policy and the Conflict-Free Gold Standard

Applicable: Corporate and Asset

(CFGS).

Our PMR (precious metals refinery) has been certified compliant with the LPPM RPPG.

This is a requirement for refiners seeking LPPM Good Delivery Accreditation, which

assures investors and consumers that the metal is conflict-free.

4.3 Implement risk-based controls to avoid/

Our risk management process is based on ISO 31000 Risk Management:

prevent/minimise/mitigate and/or

Principles and Guidelines, COSO Enterprise Risk Management, and King IV.

remedy health, safety and

See Managing our risks and opportunities within the external operating environment,

environmental impacts to workers,

page 51 and Our material matters, page 3.

local communities, cultural heritage,

and the natural environment, based

upon a recognised international

standard or management system.

Applicable: Asset

4.4 Develop, maintain and test emergency

Not yet

Not yet

Emergency preparedness plans are available per operation and per tailings storage

response plans. Where risks to external

determined

determined

facilities (TSF). As part of alignment to the Global Industry Tailings Management

stakeholders are significant, this should

Standard (GISTM) great strides have been made to test emergency response plans in

be in collaboration with affected

collaboration with local stakeholders.

stakeholders and consistent with

Emergency medical services are equipped with advanced paramedical teams

established industry good practice.

Applicable: Asset	and 24/7 rescue capability.
	See Continuous safe production, page 129, and Health, wellbeing and occupational
	hygiene, page 136.

7

GROUP

SUPPLEMENTARY INFORMATION 2023

Meets

Partially meets

N/A

Assessment summary

Principle 5: Pursue continual improvement in health and safety performance with the ultimate goal of zero harm

			Corporate						EU	AUS	Comments and reference to the Integrated report, 2023
	Performance expectations		SA PGM	SA gold	US PGM
5.1 Implement practices aimed									The Zero Harm strategic framework remains in place supported by our Fatal elimination
	at continually improving workplace									strategy. Our Fatal elimination strategy has been rolled out to all regions, including the
	health and safety; monitor performance									EU and Australia.
	for the elimination of workplace fatalities									Our Health strategy is intended to provide equitable healthcare based on health
	and serious injuries, and for the
									needs and financial risk protection. In addition, the strategy focuses on preventative
	prevention of occupational diseases,
	based upon a recognised international									healthcare with enhanced occupational health services, in support of a healthy
	standard or management system.									workforce.
Applicable: Corporate and Asset									See Continuous safe production, page 125; Health, wellbeing and occupational
											hygiene, page 136.
5.2 Provide workers with training								Not yet	Training is encapsulated within the empowered people pillar of the Zero Harm
	in accordance with their responsibilities								determined	strategic framework, with particular focus on visual imagery to enhance
	for health and safety, and implement									understanding.
	health surveillance and risk-based									See Continuous safe production, page 125.
	monitoring programmes based on
	occupational exposure.
Applicable: Corporate and Asset
Principle 6: Pursue continual improvement in environmental performance issues, such as water stewardship, energy use and climate change
			Corporate						EU	AUS	Comments and reference to the Integrated report, 2023
	Performance expectations		SA PGM	SA gold	US PGM

6.1 Plan and design for closure

in consultation with relevant authorities and stakeholders, implement measures to address closure (and related environmental and social aspects), make financial provision to realise closure and post-closure commitments.

Applicable: Corporate and Asset

Not yet	Not yet
determined	determined

Closure liability is disclosed within the Integrated report. See Minimising our environmental impact, page 211.

We are redesigning our closure plans to consider socioeconomic conditions in consultation with stakeholders who have an interest in, or are affected by, our social closure outcomes. This is a multi-year approach, due to the extensive considerations that must be taken into account. We will update and enhance our social closure plans on an ongoing basis, in the interests of achieving our stated socioeconomic outcomes.

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GROUP

SUPPLEMENTARY INFORMATION 2023

Meets

Partially meets

N/A

Assessment summary

Principle 6: Pursue continual improvement in environmental performance issues, such as water stewardship, energy use and climate change continued

Corporate

EU

AUS

Comments and reference to the Integrated report, 2023

Performance expectations

SA PGM

SA gold

US PGM

6.2 Implement water stewardship practices

Not yet

Not yet

Water stewardship practices are region specific as each region has different water

that provide for strong and transparent

determined

determined

related priorities. Water management is considered in the ESG scorecard as part of the

water governance, effective and

long-term incentive plan. See Our material matters, page 3.

efficient management of water

See Water related risks (as well as stakeholder engagement activities relating to water

at operations, and collaboration with

stakeholders at a catchment level to

management) on page 196 of the 2023 Integrated Report.

achieve responsible and sustainable

water use.

Applicable: Corporate and Asset

6.3 Design, construct, operate, monitor and

No tailings

The self-

The Tailings management framework, outlining the Group Tailings management

decommission tailings disposal/storage

facilities

assessment

system (GTMS) was reviewed by the Independent Tailings Review Board and updated.

against

facilities using comprehensive risk-

Sibanye-Stillwater met the GISTM (Global Industry Standard on Tailings Management)

GISTM

based management and governance

requirement

requirements for all very high and extreme consequence TSFs in our SA and US regions.

practices in line with internationally

s has been

For our approach to tailings management see www.sibanyestillwater.com/

recognised good practice, to minimise

initiated.

sustainability/environment/tailings-management/

the risk of catastrophic failure.

Applicable: Corporate and Asset

See Tailings Management Fact Sheet.

6.4 Apply the mitigation hierarchy

Not yet

Not yet

Our SA gold operations have successfully signed to the ICMI code and have

to prevent pollution, manage releases

determined

determined

successfully concluded the required ICMI certification audit at Kloof, Driefontein and

and waste, and address potential

Beatrix.

impacts on human health and the

See Minimising our environmental impact, page 187.

environment.

Applicable: Asset

6.5 Implement measures to improve energy

Not yet

Sibanye-Stillwater have an Energy and decarbonisation strategy in place which

efficiency and contribute to a low

determined

consists of four pillars which include alternative energy as well as energy efficiency

carbon future, and report the outcomes

programmes. See Minimising our environmental impact, page 193

based on internationally recognised

Position statement on climate change and carbon inventory in place.

protocols for measuring CO2 equivalent

See the supplementary report - Climate change related disclosure.

(GHG) emissions.

Applicable: Corporate and Asset

Mercury risk management

Sibanye-Stillwater does not produce mercury as a primary product.

position statement

Tailings governance position statement

GISTM conformance have been achieved with detail available www.sibanyestillwater.com/sustainability/environment/tailings-management/

Climate change position statement

Sibanye-Stillwater has aligned to the climate change position statement, with a scope 3 target set for 2025.

Nature position statement

This position statement has been issued by ICMM in January 2024 and we will align our business to the commitments as per the position statement.

Water stewardship position statement

Water management position statement available with supporting action plan.

9

See our Sustainability strategy: a summary, page 185.

Applicable: Corporate and Asset

In the US, Sibanye-Stillwateroperates one of the world's largest spent autocatalyst recycling operations.

GROUP

SUPPLEMENTARY INFORMATION 2023

Meets

Partially meets

N/A

Assessment summary

Principle 7: Contribute to the conservation of biodiversity and integrated approaches to land-use planning

Corporate

EU

AUS

Comments and reference to the Integrated report, 2022

Performance expectations

SA PGM

SA gold

US PGM

7.1 Neither explores nor develop new mines

No mining site within a World Heritage Site.

in World Heritage sites, respect legally designated protected areas, and design and operate any new operations or changes to existing operations to be compatible with the value for which such areas were designated.

Applicable: Corporate and Asset

7.2 Assess and address risks and impacts to	Not yet	Not yet	Position Statement on Biodiversity. A biological diversity protocol is being followed and
biodiversity and ecosystem services by	determined	determined	a baseline assessment has been completed for the SA and US operations.
implementing the mitigation hierarchy,			See our Biodiversity management fact sheet.
with the ambition of achieving no net
loss of biodiversity.
Applicable: Corporate and Asset

Principle 8: Facilitate and support the knowledge-base and systems for responsible design, use, re-use, recycling and disposal of products containing metals and minerals

			Corporate						EU	AUS	Comments and reference to the Integrated report, 2023
	Performance expectations		SA PGM	SA gold	US PGM
8.1 In project design, operation and							Not yet	Not yet	Sibanye-Stillwater's environmental function has firmly embraced the challenge to
	de-commissioning, implement							determined	determined	effectively reduce costs through proactive management of environmental incidents,
	cost effective measures for the									water conservation, carbon footprint management and reducing reliance on Rand
	recovery, re-use or recycling of									Water at the SA operations.
	energy, natural resources,

and materials.

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