Analysis: the new margins set against the bridge’s margin ladder
Two documents read together explain the timing. The bridge stepped to 4.0% over SOFR on 26 May 2026 and matured 364 days from June 2026 with only a six-month extension available. A July 2026 refinancing therefore lands in the window where the bridge is at its most expensive contractual margin and closest to maturity. The initial margin on the new dollar revolver, 220 basis points over SOFR, sits well below that final bridge step and also below the 2.70% and 2.85% that Harmony paid on the 2022 dollar facility. The company’s claim that funding costs fell relative to the refinanced facilities is consistent with the two sets of stated margins, though neither announcement discloses fees, so the all-in cost is not visible from public documents.
The rand leg carries a detail worth noting on its own. The 2022 rand facilities referenced three-month JIBAR. The new rand tranches reference ZARONIA. That switch is not a Harmony idiosyncrasy. The Market Practitioners Group published market conventions for ZARONIA-linked loan market instruments on 25 January 2024, and on 2 May 2025 urged inter-dealer brokers to prioritise trading linear derivatives referencing ZARONIA instead of JIBAR. A large corporate borrower moving its rand syndicated debt onto the overnight benchmark is the transition arriving in the loan market rather than in the derivatives market.
What the announcement does not establish is how much of the new capacity is drawn. Harmony gives commitment amounts, not balances, and the pattern in the 20-F was of facilities held largely undrawn as liquidity. The disclosure also does not quantify the sustainability targets, only names the three indicators, so the up to 5 basis points of margin at stake cannot be tested against anything. Against total commitments of US$500 million, A$500 million and R7 billion, that adjustment is small relative to the 200 to 250 basis point initial margins.
A careful reader would look next at the borrowings note in the FY2026 annual financial statements for drawn balances and the treatment of the R197 million of deferred bridge origination fees, and at whether the two one-year extension options on the sustainability-linked tranches are exercised, since the 2022 facilities were extended by 12 months in March 2024 rather than refinanced outright.
What the documents say
Harmony Gold Mining Company Limited (JSE: HAR) said on 28 July 2026 that it had concluded new syndicated multi-tranche, multi-currency loan facilities of US$500 million, A$500 million and R7 billion. The money replaces the dollar and rand syndicated facilities the company signed in 2022 and takes out the bridge loan raised to buy MAC Copper Limited. Whatever is left over is for general corporate purposes.
The Australian dollar tranches are the new element. Harmony has borrowed in rand and dollars for years. It has not previously funded itself in the currency of the assets it now owns in New South Wales and Queensland, and the announcement ties the change directly to the MAC Copper purchase, with a total transaction value of about US$1.25 billion, and the Eva Copper Project, costed at about US$1.55 to US$1.75 billion. Chief executive Beyers Nel said the deal “extends our maturity profile and provides funding capacity in the currencies most relevant to our growth pipeline”.
Five tranches, two shapes
The facilities break into five pieces. The dollar leg is a single revolving credit facility of US$500 million priced at an initial margin of 220 basis points over the Secured Overnight Financing Rate. The Australian dollar leg splits evenly, a revolving credit facility of A$250 million at 220 basis points and a term facility of A$250 million at 250 basis points, both over the Bank Bill Swap Bid Rate. The rand leg is a revolving credit facility of R4 000 million at 200 basis points and a term facility of R3 000 million at 220 basis points, both over ZARONIA, the South African Rand Overnight Index Average.
Four of the five carry an original term to maturity of three years with two one-year extension options, which could push the final maturity date out by a further two years, and are documented as sustainability-linked loans. The fifth, the rand term facility, runs 6.5 years and is a green loan. Harmony said the transaction does not result in any changes to its debt covenants.
The sustainability-linked pricing hangs on three key performance indicators agreed with the lending group and measured over the next three financial years: cumulative installed renewable electricity capacity, reduction in potable water consumption from external sources, and additional annual expenditure on committed mine community development initiatives. Meeting them earns a margin reduction of up to 5 basis points. Missing all of them applies a similar increase.
Citi and Nedbank Limited, acting through its Nedbank Corporate and Investment Banking Division, were joint global coordinators and mandated lead arrangers. Harmony reported approximately 93% lender participation and commitments totalling around three times the targeted amount, with a substantial scale-back of allocations. J.P. Morgan Equities South Africa Proprietary Limited is the JSE sponsor.
What is being replaced
The facilities being refinanced were all signed on 25 May 2022 with syndicates led by ABSA Bank Limited and Nedbank Limited. The US$400 Million Syndicated Facility comprised a US$100 million term facility priced at 2.85% over SOFR and a US$300 million revolving credit facility at 2.70% over SOFR. The R2.5 Billion Syndicated Revolving Credit Facility was priced at 2.4% over three-month JIBAR. Both were sustainability-linked, both were unsecured, and in March 2024 both received a 12-month extension that moved maturity to May 2027. A separate R1.5 Billion Green Term Loan, also dated 25 May 2022, ran six and a half years to November 2028 at 2.65% over three-month JIBAR.
At 30 June 2025 the group had drawn almost nothing under any of them. The 20-F records no drawdown or repayment on the R2.5 billion revolver, US$300 million still available under the US$400 million facility, and R226 million drawn with R50 million repaid on the green term loan. The 2022 facilities were standby liquidity, not working debt.
The bridge that was repricing
The acquisition bridge carried the nearest maturity and the highest contractual margin step. On 26 June 2025 Harmony and its Australian subsidiary signed a US$1.25 billion bridge facility with a syndicate of lenders to fund the MAC purchase, structured as a US$250 million term facility and a US$1 billion term facility, unsecured, with a maturity of 364 days from June 2026 and a six-month extension option. Origination fees of R197 million were incurred and deferred until first drawdown.
The margin on that bridge was written as a ladder: 2.0% over SOFR for the first six months from 26 May 2025, 2.8% over SOFR for the next six months from 26 November 2025, and 4.0% over SOFR for the last six months from 26 May 2026. Harmony drew it to complete the MAC acquisition on 24 October 2025, buying 100% of MAC’s securities at US$12.25 per share for a total equity value of US$1.01 billion, or approximately R18.4 billion, funded from cash reserves together with the bridge.
