MSCI lifts Harmony Gold (NYSE: HMY) ESG rating from BB to A

Rhea-AI Filing Summary

Harmony Gold Mining Company Limited reports that MSCI has upgraded its environmental, social and governance (ESG) rating from ‘BB’ to ‘A’ following a March 2026 assessment. MSCI ESG ratings evaluate a company’s resilience to long-term, financially relevant ESG risks.

The upgrade is supported by stronger performance in water management, toxic emissions and waste reduction, and enhanced governance practices. Harmony’s environmental pillar score rose from 3.0 to 5.1, and its social score improved from 2.4 to 4.7, while governance remained high at 7.4, highlighting ongoing strength in oversight and controls.

Management highlights this as recognition of sustainability being embedded across operations and aligned with long-term decarbonisation and stakeholder engagement strategies, reinforcing accountability to investors, employees and communities.

Key Figures

MSCI ESG rating: Upgraded from BB to A Environmental pillar score: 3.0 to 5.1 Social pillar score: 2.4 to 4.7 +1 more

4 metrics

MSCI ESG rating Upgraded from BB to A Most recent MSCI ESG assessment in March 2026

Environmental pillar score 3.0 to 5.1 MSCI ESG environmental pillar change

Social pillar score 2.4 to 4.7 MSCI ESG social pillar change

Governance pillar score 7.4 MSCI ESG governance pillar, consistently high

Key Terms

MSCI ESG ratings, environmental pillar score, toxic emissions, governance practices, +1 more

5 terms

MSCI ESG ratings financial

"MSCI ESG ratings measure companies’ resilience to long-term, financially relevant ESG risks."

environmental pillar score financial

"Notably, our environmental pillar score improved from 3.0 to 5.1,"

toxic emissions technical

"underpinned by measurable progress in water management, toxic emissions and waste reduction"

governance practices financial

"and enhanced governance practices."

decarbonisation technical

"aligning with our long-term decarbonisation and stakeholder engagement strategies."

Decarbonisation is the process of cutting the amount of carbon dioxide and similar greenhouse gases a company or economy produces, by switching to cleaner energy, improving efficiency, or capturing emissions. For investors it matters because it changes costs, regulatory exposure and future demand—like renovating a house to avoid fines and attract buyers, companies that decarbonise can reduce risk and access new markets while those that don’t may face higher costs or stranded assets.

Form 6-K: How Foreign Companies Report to the SEC →

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6­K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a­16 OR 15d­16 UNDER THE

SECURITIES EXCHANGE ACT OF 1934

For April 29, 2026

Harmony Gold Mining Company Limited

Randfontein Office Park

Corner Main Reef Road and Ward Avenue Randfontein, 1759

South Africa

(Address of principal executive offices)

*-­

(Indicate by check mark whether the registrant files or will file annual reports under cover of

Form 20­ F or Form 40­F.)

Form 20F ☒ Form 40F ☐

(Indicate by check mark whether the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3­2(b) under the Securities Exchange Act of 1934.)

Yes ☐ No ☒

Harmony Gold Mining Company Limited

Registration number 1950/038232/06

Incorporated in the Republic of South Africa

ISIN: ZAE000015228

JSE share code: HAR

(“Harmony” or the “Company”)

Embedded sustainability drives Harmony’s MSCI ESG Ratings upgrade to ‘A’

Johannesburg, Wednesday, 29 April 2026. Harmony Gold Mining Company Limited (“Harmony” or the “Company”) is pleased to announce that MSCI has upgraded the Company’s environmental, social and governance (ESG) rating from ‘BB’ to ‘A’ following its most recent assessment in March 2026.

MSCI ESG ratings measure companies’ resilience to long-term, financially relevant ESG risks. These ratings analyse industry-specific risks, management quality and controversies to identify potential impacts on a company's financial performance.

This improvement reflects our strengthened performance across key ESG pillars, underpinned by measurable progress in water management, toxic emissions and waste reduction and enhanced governance practices. Notably, our environmental pillar score improved from 3.0 to 5.1, while our social score improved from 2.4 to 4.7, demonstrating tangible progress in operational efficiency, employee engagement and community relations. Governance remains a core strength, with a consistently high score of 7.4.

“This upgrade to an ‘A’ rating by MSCI is a strong endorsement of the progress we have made in embedding sustainability into every aspect of our business. It reflects the dedication of our people, the resilience of our operations and our unwavering commitment to creating long-term value for all stakeholders while responsibly managing our environmental and social impacts,” says CEO, Beyers Nel.

The upgrade underscores Harmony’s commitment to sustainability, transparency and responsible mining practices, aligning with our long-term decarbonisation and stakeholder engagement strategies. We continue to integrate ESG considerations into our strategic objectives, reinforcing our accountability to investors, employees and our communities.

Ends.

For more details contact:

Investor Relations

+27 (0) 11 411 2138

Johannesburg, South Africa

29 April 2026

Sponsor:

J.P. Morgan Equities South Africa Proprietary Limited

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on

its behalf by the undersigned, thereunto duly authorized.

									Harmony Gold Mining Company Limited
Date: April 29, 2026									By: /s/ Boipelo Lekubo
									Name: Boipelo Lekubo
									Title: Financial Director

FAQ

What ESG rating did Harmony Gold Mining Company (HMY) receive from MSCI?

Harmony Gold’s ESG rating from MSCI was upgraded to ‘A’, from ‘BB’, in a March 2026 assessment. This reflects stronger performance across environmental, social and governance pillars, including better water management, reduced toxic emissions and waste, and consistently strong governance practices.

How did Harmony Gold’s environmental ESG score change in the MSCI review?

Harmony Gold’s environmental pillar score increased from 3.0 to 5.1 in MSCI’s 2026 ESG assessment. The improvement is linked to measurable progress in water management, toxic emissions control and waste reduction, indicating more efficient and responsible environmental operations.

What improvements did Harmony Gold (HMY) show in its social ESG score?

Harmony Gold’s social score improved from 2.4 to 4.7 under MSCI’s ESG framework. This gain reflects better operational efficiency, stronger employee engagement and enhanced community relations, indicating more robust social practices within the company’s mining operations.

How strong is Harmony Gold’s governance score in the MSCI ESG rating?

Harmony Gold’s governance score is 7.4 in the MSCI ESG rating, described as a core strength. This high score signals strong oversight, risk management and governance structures, which support long-term value creation and accountability to investors and other stakeholders.

What does the MSCI ESG upgrade mean for Harmony Gold’s sustainability strategy?

The MSCI ESG upgrade to an ‘A’ rating aligns with Harmony Gold’s focus on embedded sustainability. It underscores progress in decarbonisation, responsible mining and stakeholder engagement, reinforcing how environmental and social priorities are integrated into the company’s long-term strategic objectives.