Australia’s largest gold producer, Northern Star Resources Ltd., has rejected a A$39 billion ($27 billion) takeover bid from South African rival Gold Fields Ltd., citing concerns that the offer undervalues the company’s assets and exposes shareholders to new risks. The Perth-based miner dismissed the proposal as “opportunistic, unsolicited and conditional,” coming at a time when the company is preparing for leadership transition and commissioning a new project.

Northern Star has been under pressure from US hedge fund Elliott Management, which called for the company to explore a sale following a series of profit warnings and operational challenges over the past year. Elliott identified Gold Fields as one of the few gold producers capable of acquiring Northern Star, urging the board to engage in discussions with the suitor to unlock potential value. John Pike, a partner at Elliott, stated that any transaction should reflect the “immense potential for value creation” at Northern Star and emphasized that the board has a duty to seriously evaluate the sale offer.

Gold Fields’ offer included a combination of cash and shares, with approximately 73 percent of the bid proposed to be paid in new Gold Fields stock. The South African miner owns several major Australian gold mines, including Gruyere and Granny Smith, and has pledged to establish a Sydney listing to facilitate Australian investor participation. Gold Fields argued that the deal would create the world’s second-largest gold producer behind Newmont, with combined annual output of about 2.4 million ounces, roughly 60 percent of which would come from Western Australia. The company also highlighted potential cost and operational synergies of up to $5 billion, as well as planned asset disposals valued at least $4 billion.

Despite offering a 22 percent premium over Northern Star’s share price prior to the bid, the Australian company’s board maintained that the proposal materially undervalues its portfolio and growth prospects. Chairman Michael Chaney criticized the timing of the offer, occurring just before the arrival of incoming CEO Suresh Vadhnagra, a veteran executive with experience at Glencore Plc and Newcrest Mining Ltd. Chaney underscored the board’s commitment to safeguarding shareholder interests and dismissed the acquisition as coming at a “highly opportunistic” moment.

The bid’s impact was reflected in market movements: Northern Star’s shares rose 6.1 percent in Sydney after the rejection, although they still traded below the implied value of the offer, while Gold Fields’ stock dropped 14 percent in Johannesburg trading, extending losses during a difficult year for the company.

The transaction would have positioned Gold Fields and Northern Star as dominant players in the Australian gold mining sector and added scale to Gold Fields’ global portfolio. However, Northern Star’s concerns about jurisdictional, operational, and valuation risks have so far prevented progress toward a deal, leaving the future of the takeover proposal uncertain amid ongoing industry consolidation pressures and fluctuating gold market dynamics.