A tough year for Northern Star Resources Ltd (ASX: NST) has taken a sudden turn on Tuesday.
At the time of writing, the Northern Star share price is up 12.21% to $20.77.
It is a huge one-day move for Australia's largest listed gold miner, especially given how much pressure the stock has been under.
Even after today's jump, Northern Star shares are still down around 22% in 2026.
The fall has come as gold prices have cooled from recent highs and investors have become more frustrated with Northern Star's operational performance.
So, what has sparked today's sudden buying?
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Activist pressure builds
According to reports, Elliott Investment Management has built a stake worth more than $1 billion in Northern Star and is pushing for a strategic review of the company.
That review could include a potential sale, as well as a closer look at the gold miner's operational performance.
Elliott has reportedly criticised Northern Star's recent record, pointing to operational missteps, cost overruns, and inconsistent strategic direction.
It also wants the company to review its options while searching for a new chief executive.
The pressure comes at a sensitive time for the miner.
Northern Star recently announced that managing director Stuart Tonkin will step down during the first quarter of FY27.
He will remain in the role through the current transition period, including the commissioning phase of the KCGM Fimiston Mill Expansion.
That project has been closely watched by investors after recent setbacks and downgrades. It also sits near the centre of the frustration around Northern Star's recent performance.
Why the market is taking this seriously
The size of the share price reaction suggests investors are taking Elliott's involvement very seriously.
Northern Star has already tried to address some of the market's concerns. The company launched an on-market share buyback of up to $500 million, which is expected to run over 12 months.
The buyback gives the company a way to return cash to shareholders and show confidence in its own value. But Elliott appears to be pushing for a much wider review.
The investor has reportedly argued that Northern Star has not fully benefited from a strong gold price backdrop. Spot gold is currently trading around US$4,480 an ounce, up 33% over the past year.
Foolish bottom line
Today's jump shows investors are willing to give Northern Star another look if there's pressure for change.
The company still has major assets, including the Kalgoorlie Super Pit, but the share price weakness shows investors want better returns from that asset base.
Elliott's involvement doesn't guarantee a sale or a quick fix. But it does raise the pressure on the board at a time when Northern Star is already searching for a new chief executive.
