Harmony Gold Mining Company, founded 1950 and headquartered in Randfontein, South Africa, is a major precious metals producer operating deep underground and open-pit mines across South Africa, Papua New Guinea, and Australia.
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Harmony Gold publishes comprehensive climate and ESG reporting with SBTi-validated targets, but will miss its FY26 interim emissions milestone. Scope 3 emissions remain undisclosed. Trade association membership in MCSA actively lobbies against South Africa's carbon tax—directly misaligned with the company's 1.5°C commitment. Hidden Valley mine in PNG has documented sedimentation and environmental litigation history.
Harmony Gold Mining Company scores 31/100 (Below expectations) on SINK's independent climate assessment, scored from public data only. Fees pay for the review, never the result. Last verified July 2026.
That places Harmony Gold Mining Company joint 588th of 847 companies scored, and 1st of 14 in Mining & Extraction.
Harmony Gold Mining Company is the highest-scoring mining & extraction company we've rated.
Among the 14 major mining & extraction brands we've scored, Harmony Gold Mining Company sits 1st of 14.
Its three lowest-scoring questions, and what the evidence didn't show.
No Scope 3 emissions quantification or value-chain supplier engagement programme identified.
No TNFD disclosure, quantified nature footprint, or verified biodiversity net-gain programme identified.
Phase 2 solar (100MW) not operational until end of 2026.
A score changes when the evidence does. We use new published evidence at the next rescore. Evidence that isn't public can count through an evidence review.
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Get in touch →Strongest on Transparency & Accountability and Carbon Footprint — Operations (7/10, 6/10). Weakest on Carbon Footprint — Supply Chain and Nature & Biodiversity Impact (3/10, 3/10).
Harmony Gold Mining Company leads its sector. These are the next 3 down.
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See the breakdown →The formula and all 12 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale12 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
9 of 12 sources are independent of the company.
“We assure 21 material indicators, of which six are subject to reasonable assurance and 15 to limited assurance.”
“The mine also emitted 933,205 tons of CO2 equivalent in 2024.”
“In 2023, we received approval of our 1.5°C SBTi near term target to reduce absolute scope 1 and 2 GHG emissions by 63% by FY36.”
“Our level of alignment with GISTM is a matter we are continuing to assess noting the practicality and economic feasibility of retrofitting historical TSFs.”
“We have committed to reducing absolute scope 1 and 2 greenhouse gas emissions by 63% by FY36 from a FY21 base year.”
“Harmony anticipates that this latest project will supply about 20% of the peak daytime demand of South African operations once completed.”
“Harmony Gold has maintained its Carbon Disclosure Project (CDP) score of 'A' for its water management during the 2023 assessment period.”
“Harmony refurbished three WWTPs on behalf of the Matjhabeng, Matlosana, and Merafong municipalities.”
“A pause in certain Eva Copper land-clearing activities for a protected species assessment.”
“Its members include famous South African mining houses such as Anglo American, De Beers, Gold Fields, and Harmony.”
“The Minerals Council's engagement with specific items of climate legislation has focused primarily on South Africa's Carbon Tax Act, which the group has consistently pushed to block, weaken or delay since 2015.”
“Local landowners are suing the mine's owners, Harmony Gold and Newcrest Mining, for alleged negligence in allowing the pollution of the rivers with material containing heavy metals.”
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Harmony Gold Mining Company, founded 1950 and headquartered in Randfontein, South Africa, is a major precious metals producer operating deep underground and open-pit mines across South Africa, Papua New Guinea, and Australia. The company operates the world's largest tailings retreatment programme and is the second-largest primary gold producer globally by output.
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