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The Board of Australian gold miner Northern Star Resources rejected an unsolicited US$27.1 billion (R445 billion) takeover bid by Johannesburg-based Gold Fields at the end of September in no uncertain terms. The Perth-based company, the largest Australia-domiciled gold miner, said the bid was opportunistic, undervalued the company, and would expose it to higher jurisdictional risk. It added that it was not appropriate to engage in further discussions at this time.

That jurisdictional risk is emerging as one of the central obstacles facing Gold Fields in its attempt to buy out Northen Star. The Australian company gives investors concentrated exposure to Western Australia, one of the world’s most highly regarded mining jurisdictions. A takeover by Gold Fields would instead leave those shareholders exposed to a global portfolio that includes South Africa and Ghana, meaning the deal is not simply a question of price. Gold Fields must also persuade Northern Star investors that taking on greater country risk is worth it.

The game is, however, far from over and signs are that Gold Fields is looking to appeal directly to Northern Star shareholders over the board’s head. The company has an Australian investor roadshow scheduled for late October.

The combined operation would be the world’s second-biggest gold miner, behind Newmont, headquartered in Denver, Colorado. While Gold Fields is a global player, with mines in South Africa, Ghana, Peru, Chile, and Canada, as well as four operations in Western Australia, Northern Star is mostly confined to Western Australia.

Under the Gold Fields offer, made on 13 September, Northern Star shareholders would receive 0.3125 Gold Fields shares and A$7.25 for every Northern Star share held. The outcome would be that Northern Star shareholders would own 33% of Gold Fields.

The two-year bull run in the gold price suggests that cash-flush companies will be looking for acquisitions lest they become targets themselves. Northern Star was at a vulnerable point recently, operating without a full-time CEO, with an underperforming main processing mill at Fimiston and a 2026 history of revising production forecasts downward. But if it resolves these issues, as the company’s board seems confident that it is on the brink of doing, its share price will recover and prospective buyers like Gold Fields will have to offer more money.

In an announcement at the end of September, Gold Fields repeated the terms of its offer. It stated that there were potential synergies between the two companies’ operations in Western Australia that could yield portfolio optimisation worth US$4 billion to US$5 billion.

But the jurisdictional risk issue identified by Northern Star cannot be wished away. Northern Star investors explicitly hold shares for premier, low-risk Western Australian gold exposure. Accepting the stock-heavy deal would force them to hold a combined entity where three quarters of their equity value would be exposed to the wider jurisdictional dynamics of Gold Fields’ international portfolio, including South Africa and Ghana.

In Ghana, Gold Fields faces an ongoing, unresolved dispute regarding the renewal of its mining leases at Tarkwa, which are set to expire in April 2027. Its primary listing in Johannesburg also exposes investors to concerns around governance, capital controls, taxation, and the broader South African policy environment. South Africa ranks 57th out of 68 jurisdictions on the Fraser Institute’s index of mining investment attractiveness, while Western Australia ranks 6th.

For Gold Fields, therefore, winning Northern Star may require considerably more than convincing shareholders that the industrial logic of the merger makes sense. It may have to offer them enough value to compensate for the additional country risk they would be taking on.