Harmony (HMY) worker dies in seismic incident at Moab Khotsong mine

Rhea-AI Filing Summary

Harmony Gold Mining Company Limited reported a tragic loss-of-life incident at its Moab Khotsong mine near Orkney. An employee died in a seismicity-related fall-of-ground incident that occurred on the morning of 19 June 2026.

Harmony expressed condolences to the employee’s family, friends and colleagues, and stated that management is providing support to those affected. All relevant stakeholders have been notified, and an investigation led by the Department of Mineral and Petroleum Resources (DMPR) is underway to determine the circumstances of the incident.

Chief Executive Officer Beyers Nel reiterated that safety is Harmony’s foremost priority and committed to working closely with the DMPR to ensure lessons from this event are applied across the company’s operations.

Key Terms

seismicity-related fall-of-ground incident, Department of Mineral and Petroleum Resources, loss-of-life incident

3 terms

seismicity-related fall-of-ground incident technical

"tragically lost his life in a seismicity-related fall-of-ground incident"

Department of Mineral and Petroleum Resources regulatory

"An investigation, led by the Department of Mineral and Petroleum Resources (DMPR), is underway"

loss-of-life incident other

"Harmony reports a tragic loss-of-life incident at its Moab Khotsong mine"

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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 June 22, 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”)

Harmony reports a tragic loss-of-life incident at its Moab Khotsong mine

Johannesburg, Monday, 22 June 2026. Harmony Gold Mining Company Limited (“Harmony” and/or “the Company”) regrets to announce that an employee at its Moab Khotsong mine, near Orkney, tragically lost his life in a seismicity-related fall-of-ground incident on the morning of Friday, 19 June 2026.

We extend our deepest condolences to his family, friends and colleagues. Management is providing support to the family and affected employees during this difficult time.

All relevant stakeholders have been notified. An investigation, led by the Department of Mineral and Petroleum Resources (DMPR), is underway.

“We are deeply saddened by the loss of our colleague. Our heartfelt condolences are with his family, friends and colleagues during this very difficult time. Safety is our foremost priority, and we will work closely with the DMPR to understand the circumstances of this incident and ensure that the necessary lessons are applied across our operations,” said Beyers Nel, Chief Executive Officer of Harmony.

Ends.

For more details contact:

Chipo Morapedi-Mrara

Head of Communications

+27 (0)60 571 0797

Jared Coetzer

Head of Investor Relations

+27 (0)82 746 4120

Mashego Mashego

Executive Director

+27 (0)82 767 1072

22 June 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: June 22, 2026									By: /s/ Boipelo Lekubo
									Name: Boipelo Lekubo
									Title: Financial Director

FAQ

What incident did Harmony Gold Mining Company Limited (HMY) report at Moab Khotsong?

Harmony reported a fatal, seismicity-related fall-of-ground incident at its Moab Khotsong mine. One employee tragically lost his life in the event on the morning of 19 June 2026, prompting an official investigation and extensive internal support efforts.

When did the Moab Khotsong loss-of-life incident reported by Harmony (HMY) occur?

The loss-of-life incident at Harmony’s Moab Khotsong mine occurred on the morning of 19 June 2026. The company disclosed the event in a later communication dated 22 June 2026, highlighting the timing and its immediate response to the tragedy.

Who is leading the investigation into Harmony’s Moab Khotsong mine incident?

The investigation into the Moab Khotsong incident is being led by the Department of Mineral and Petroleum Resources (DMPR). Harmony stated it will work closely with the DMPR to understand what happened and apply any lessons across its mining operations.

How did Harmony (HMY) respond to the fatal incident at Moab Khotsong?

Harmony expressed deep condolences to the deceased employee’s family, friends and colleagues. Management is providing support to affected employees, has notified all relevant stakeholders, and committed to cooperating fully with the DMPR-led investigation into the incident’s circumstances.

What did Harmony’s CEO say about safety after the Moab Khotsong incident?

Chief Executive Officer Beyers Nel emphasized that safety is Harmony’s foremost priority. He stated the company will work closely with the DMPR to understand the incident and ensure that the necessary lessons are implemented across Harmony’s mining operations.

Which mine was involved in the June 2026 incident reported by Harmony Gold (HMY)?

The incident occurred at Harmony’s Moab Khotsong mine, located near Orkney in South Africa. The company described the event as a seismicity-related fall-of-ground accident that resulted in the tragic death of one employee underground.