The copper price has flourished in recent months, climbing by 27% since the start of the year to about US$10,800 per tonne on the London Metal Exchange.
And according to some analysts, this rally could have plenty of room to grow.
For instance, US investment firm JPMorgan Chase & Co (NYSE: JPM) believes that a widening global supply deficit could see copper rise to US$12,000 per tonne by the first quarter of 2026.
And a sustained upswing in the copper price may be good news for leading ASX 200 mining stocks with substantial exposure to the red metal.
These include diversified mining powerhouse BHP Group Ltd (ASX: BHP) which has transformed into the world's biggest copper producer in the past few years.
Other copper-focused ASX 200 mining stocks such as Sandfire Resources Ltd (ASX: SFR) and Capstone Copper Corp CDI (ASX: CDC) could also benefit.
However, beyond the heavyweights, the ASX is home to several emerging copper companies already mining or moving their respective projects towards production.
Below, we present an overview of three lesser-known ASX copper stocks with surging share prices.
Image source: Getty Images
29Metals Ltd (ASX: 29M)
29Metals operates the Golden Grove copper mine in Western Australia, which also produces significant amounts of zinc, gold, and silver.
Overall, the company is targeting up to 25,000 tonnes of copper output from Golden Grove in the 2025 calendar year.
In addition, it plans to bring its Capricorn copper mine in Queensland back to production after extreme rainfall suspended operations in 2023.
Combined, the two projects hold about 2.2 million tonnes of contained copper, 2.3 million tonnes of zinc, 1.2 million ounces of gold, and 75 million ounces of silver.
Each project has a resource base large enough to support a mining operation of more than 10 years.
The company is also ramping up exploration drilling as it looks to grow the existing resource at Golden Grove.
Shares in 29Metals have ballooned by 191% in the past six months, ending Wednesday at $0.47 per share.
Hot Chili Ltd (ASX: HCH)
Hot Chili is a mineral exploration business advancing its Costa Fuego copper and gold project in Chile towards production.
Costa Fuego already hosts a large resource base across three deposits: Cortadera, Productora, and San Antonio.
Here, management believes the 3.4 million tonnes of contained copper equivalent represents one of the largest undeveloped copper mineral resources in the world.
In addition, a recent discovery at the nearby La Verde prospect adds potential for further resource expansion.
Earlier this year, Hot Chili unveiled the results from an economic evaluation gauging the merits of bringing Costa Fuego to production.
This pre-feasibility study (PFS) outlined a 20-year mine, with output of about 116,000 tonnes of copper equivalent per annum across 14 years of primary production.
The study also estimated post-tax free cashflow of US$3.86 billion for the life of the mine, as well as a payback period 4.5 years.
Hot Chili now plans to launch a more detailed definitive feasibility study, whilst also conducting an environmental impact assessment for the project.
Further exploration drilling at La Verde could also be on the cards.
In the past six months, Hot Chili shares have surged by 85% to $0.87 per share at yesterday's close.
Firefly Metals Ltd (ASX: FFM)
Firefly is another exploration company moving its Green Bay copper and gold project in the Canadian province of Newfoundland closer to production.
As things stand, Green Bay holds a resource containing one million tonnes of copper and 550,000 ounces of gold. This equates to 1.2 million tonnes of copper equivalent.
However, the company's strategy is centred on growing this resource even further.
At present, eight drill rigs are operating at Green Bay as Firefly looks to upgrade the resource, extend known mineralisation, and unearth new discoveries.
Notably, recent drilling delivered high-grade copper and gold hits which extended the known mineralisation by 650 metres beyond the current resource.
In addition, further "exceptional" drilling results defined an 800-metre zone of "very high-grade" mineralisation which remains open along strike.
Management noted that this zone could significantly impact a mineral resource estimate for the project, planned for release in the current quarter.
FireFly shares have now increased by 102% in just six months, reaching $1.82 per share at the close of business on Wednesday.
