Highlights

  • The 13 companies span oil, LNG, gas, coal, refining and mining services.
  • Origin enters reporting season with upgraded Energy Markets guidance.
  • Santos is ramping Barossa and Pikka after its takeover proposal lapsed.
  • Woodside’s next phase depends on Scarborough, Trion and Louisiana LNG.
  • Comet Ridge and Strike face tighter funding and development deadlines.
  • Balance-sheet strength separates the established producers from early-stage developers.

Australia’s listed energy sector enters August 2026 with sharply contrasting earnings profiles, balance sheets and project timelines. Although all 13 companies examined here sit within the broad energy landscape, they range from integrated utilities and global liquefied natural gas producers to coal miners, refining businesses, domestic gas developers and a mining-services contractor.

That difference matters. Woodside Energy (ASX:WDS), Santos (ASX:STO) and Karoon Energy (ASX:KAR) are directly exposed to oil and LNG production. Origin Energy (ASX:ORG) combines retail electricity, generation and gas interests. Whitehaven Coal (ASX:WHC) and Stanmore Resources (ASX:SMR) depend heavily on metallurgical coal prices, while Viva Energy (ASX:VEA) and Ampol (ASX:ALD) earn through refining, fuel distribution and convenience retail.

Further down the development curve, Amplitude Energy (ASX:AEL), Strike Energy (ASX:STX), Comet Ridge (ASX:COI) and Carnarvon Energy (ASX:CVN) are working to convert reserves and projects into dependable cash flow. Macmahon Holdings (ASX:MAH), meanwhile, offers indirect exposure through mining services rather than commodity production.

The main question for August is therefore not simply which company produces the most energy. It is which businesses can convert current operating conditions into cash, fund major projects and manage risk without placing excessive pressure on their balance sheets.

Karoon Energy (ASX:KAR): Oil Exposure Meets Operational Pressure

Karoon Energy remains one of the more oil-weighted companies in the group, with production centred on the Baúna operation offshore Brazil and the Who Dat assets in the Gulf of Mexico.

For 2025, Karoon produced 10.3 million barrels of oil equivalent, generating revenue of US$628.6 million, underlying Earnings Before Interest, Tax, Depreciation, Amortisation and Exploration Expense (EBITDAX) of US$388.8 million and underlying Net Profit After Tax (NPAT) of US$107.5 million. Operating cash flow reached US$251.4 million.

The operational picture became more difficult in the June 2026 quarter. Maintenance activity at Baúna and a riser leak at Who Dat affected production, prompting management to reduce 2026 guidance to 7.2–8.2 million barrels of oil equivalent from 8.1–9.2 million. Capital expenditure guidance also increased to US$178–202 million.

Karoon’s investment case now rests on stabilising production, reducing operational interruptions and advancing the Neon and Who Dat East projects without further balance-sheet pressure.

Origin Energy (ASX:ORG): Integrated Earnings and Raised Guidance

Origin combines electricity retail, generation, gas production and its interest in Australia Pacific LNG, creating a more diversified earnings base than most companies in this group.

In H1’FY26, Origin reported statutory NPAT of AUD 557 million, underlying profit of AUD 593 million and underlying Earnings Before Interest, Tax, Depreciation and Amortisation (EBITDA) of AUD 1.589 billion. Adjusted free cash flow was AUD 705 million, while net debt remained at approximately 2.0 times EBITDA.

Management upgraded FY26 Energy Markets EBITDA guidance to AUD 1.55–1.75 billion. Australia Pacific LNG production is expected to reach 645–680 petajoules, with cash distributions of AUD 700–950 million.

The August result will test whether higher Energy Markets earnings, gas distributions and battery investments are translating into sustainable cash generation. The separation of Octopus Energy and its Kraken technology platform also remains an important strategic development.

Santos (ASX:STO): Barossa and Pikka Drive the Standalone Story

Santos enters August without the takeover support that previously influenced the company’s narrative. The proposed transaction involving an international consortium was withdrawn in September 2025, leaving the company’s outlook dependent on operational execution.

For 2025, Santos reported sales revenue of US$4.9 billion, underlying NPAT of US$898 million, free cash flow of US$1.8 billion and production of 87.7 million barrels of oil equivalent. Gearing stood at 21.5%.

The focus has now shifted to new production. Barossa was operating at approximately 97% of planned rates, with first cargo delivered ahead of the original timetable. Pikka Phase 1 in Alaska is ramping towards an expected plateau of around 80,000 barrels per day, with first revenue anticipated during the third quarter.

Santos narrowed 2026 production guidance to 99–105 million barrels of oil equivalent, while capital expenditure is expected at US$1.95–2.15 billion. Barossa, Pikka and the proposed Papua LNG investment will determine whether the company can lift production while keeping funding requirements manageable.

Woodside Energy (ASX:WDS): Funding the Next LNG Expansion

Woodside remains the largest operating business in this group and delivered record production of 198.8 million barrels of oil equivalent in 2025.

Revenue reached US$12.984 billion, underlying EBITDA was US$9.277 billion, underlying NPAT totalled US$2.6 billion and operating cash flow reached US$7.192 billion. Gearing remained at 18.2%.

The next phase depends on project execution. Scarborough was approximately 94% complete, with first LNG targeted for the fourth quarter of 2026. Trion is being developed for first oil in 2028, while Louisiana LNG has moved into development with first production targeted for 2029.

Woodside guides to 2026 production of 172–186 million barrels of oil equivalent and capital expenditure of US$4.0–4.5 billion. The lower production range reflects natural decline ahead of new project volumes. The company must therefore balance shareholder returns with one of the sector’s largest investment programs.

Viva Energy (ASX:VEA): Refining Upswing Changes the Earnings Picture

Viva Energy operates the Geelong refinery alongside fuel distribution, convenience retail and commercial energy operations.

FY25 replacement-cost EBITDA was AUD 700.9 million, while replacement-cost NPAT totalled AUD 183.6 million. Net debt stood at approximately AUD 2.07 billion.

The first half of 2026 brought a sharp change. Viva indicated group replacement-cost EBITDA of approximately AUD 770–780 million, compared with AUD 305 million in the prior corresponding period. Refining EBITDA was expected at around AUD 353 million, supported by a Geelong refining margin of US$21.10 per barrel, versus US$8.20 previously.

The rise materially improves near-term earnings, but refining margins are volatile. Investors will need to distinguish between sustainable improvement across convenience and fuel operations and a temporary earnings uplift from unusually favourable refining conditions.

Ampol (ASX:ALD): Refining Recovery and Retail Expansion

Ampol combines the Lytton refinery, fuel infrastructure, convenience retail and its New Zealand operations.

For FY25, replacement-cost operating profit EBIT increased 32% to AUD 946.8 million, while replacement-cost operating NPAT rose 83% to AUD 429 million. Lytton contributed AUD 163.1 million, compared with a AUD 42.3 million loss in the prior year.

Net debt was AUD 2.903 billion, leaving integration and capital allocation as important considerations. The planned acquisition of EG Australia could enlarge Ampol’s retail network, but regulatory approval and execution remain key uncertainties.

As with Viva, Ampol’s outlook depends partly on whether refining earnings remain elevated or return towards more normal levels.

Whitehaven Coal (ASX:WHC): Metallurgical Expansion Meets Lower Prices

Whitehaven’s acquisition of Blackwater and Daunia transformed the company into a larger producer with greater exposure to metallurgical coal.

In FY25, managed run-of-mine production increased 60% to 39.1 million tonnes, while revenue rose 53% to AUD 5.8 billion. Underlying EBITDA reached AUD 1.4 billion and statutory NPAT was AUD 649 million.

The first half of FY26 was more difficult. Revenue fell 28% to AUD 2.48 billion, underlying EBITDA declined to AUD 446 million, and the company reported an underlying loss of AUD 19 million. Net debt increased to AUD 710 million.

FY26 managed run-of-mine production guidance remains 37–41 million tonnes, with unit costs of AUD 130–145 per tonne. Whitehaven now needs volume, cost control and metallurgical coal prices to offset the heavier funding burden created by its expanded asset base.

Stanmore Resources (ASX:SMR): Higher Volumes, Lower Realised Prices

Stanmore is a more concentrated metallurgical coal producer, with operations across Queensland.

For 2025, revenue was US$1.88 billion and underlying EBITDA reached US$385 million. The company reported a net loss of US$47 million as realised coal prices declined 21% to US$133 per tonne, despite record saleable production of 14.0 million tonnes.

Free cash flow remained positive at US$296 million, while net debt was only US$33 million. This comparatively conservative balance sheet provides some protection against commodity volatility.

For 2026, Stanmore expects production of 12.8–13.4 million tonnes and free-on-board cash costs of US$93–97 per tonne. The key issue is whether lower prices and rising costs continue to offset production performance.

Amplitude Energy (ASX:AEL): Production Growth and Deleveraging

Amplitude Energy has moved closer to becoming a more financially stable east-coast gas producer.

FY26 production reached a record 27.6 petajoules equivalent, while sales revenue increased 7% to AUD 285.8 million. During H1’FY26, revenue rose to AUD 141.5 million, underlying EBITDAX reached AUD 100.3 million, and NPAT increased to AUD 25.7 million from AUD 7.8 million.

Net debt declined to AUD 34.2 million, down substantially from AUD 243 million.

The next growth step is the East Coast Supply Project, with a final investment decision targeted for Q1’FY27 and first gas expected in 2028. Foundation gas agreements covering 50 petajoules provide initial revenue visibility, but development execution and continued reliability at the Orbost processing plant remain central risks.

Strike Energy (ASX:STX): Development Ambition Meets Funding Risk

Strike is developing gas and power assets in Western Australia’s Perth Basin.

H1’FY26 revenue was AUD 36 million, supported by a realised gas price of AUD 7.37 per gigajoule. Cash stood at AUD 69.5 million, but the company had drawn AUD 108.8 million from its financing facility after spending AUD 99.5 million on capital projects.

South Erregulla’s gas field and power station are expected to begin commercial operations in late 2026, while West Erregulla remains a longer-dated development opportunity.

The near-term issue is funding. Strike must complete its current projects and secure sufficient capital before its development assets begin contributing meaningful cash flow.

Comet Ridge (ASX:COI): Mahalo Consolidation Faces Hard Deadlines

Comet Ridge is seeking to consolidate ownership of the Mahalo Gas Hub in Queensland by acquiring the remaining 42.86% interest.

The transaction has a potential value of AUD 58 million, including upfront cash, shares and contingent payments. Comet Ridge is seeking to partly fund the deal through an AUD 40.9 million capital raising.

At the end of the March quarter, cash was only AUD 2.63 million, while the company also had access to a AUD 9.5 million facility. This makes transaction completion and funding the defining near-term issues.

Mahalo offers sizeable gas resources and contracted supply from 2030, but first production remains several years away. The project’s longer-term potential therefore depends on financing, approvals and development discipline.

Carnarvon Energy (ASX:CVN): Cash-Backed but Dependent on Dorado

Carnarvon’s main exposure is the offshore Bedout Basin, including the Dorado oil and condensate project.

The company held AUD 98.3 million in cash at the end of December 2025 and had no debt. It also benefits from a US$90 million development-cost carry related to Dorado.

However, the final investment decision remains deferred, leaving Carnarvon dependent on the project operator’s timetable. An exploration campaign is planned for 2027, with Carnarvon’s expected share of expenditure around AUD 20 million.

Its balance sheet offers protection, but the absence of near-term production means the investment case remains tied to future drilling and project approval.

Macmahon Holdings (ASX:MAH): Energy Exposure Through Mining Services

Macmahon differs from the other companies because it earns contracted revenue from mining operations rather than selling energy commodities.

FY25 revenue increased 20% to AUD 2.4 billion, while underlying EBITDA reached AUD 387.4 million. The order book stood at AUD 5.1 billion at December 2025, supported by a tender pipeline of AUD 25.6 billion.

FY26 guidance includes revenue of AUD 2.6–2.8 billion and underlying EBIT(A) of AUD 180–195 million. Net debt stood at AUD 144.1 million.

The company benefits from strong mining activity, particularly among gold clients, but its future performance remains linked to contract execution, labour availability and customer capital spending.

What Will Define August 2026?

The sector’s August outlook can be divided into three themes.

First, the established producers must demonstrate that cash generation can fund growth. Woodside and Santos face large project programs, while Origin must convert upgraded guidance into free cash flow.

Second, coal and refining companies remain exposed to pricing cycles. Whitehaven and Stanmore need better metallurgical coal economics, while Viva and Ampol must show whether recent refining gains can persist.

Third, the smaller gas developers face execution and funding tests. Amplitude enters from a comparatively better financial position, while Strike and Comet Ridge face more immediate capital requirements. Carnarvon remains well funded but dependent on project timing outside its direct control.

Conclusion

The 13 ASX energy companies examined here should not be viewed as one uniform sector. Their risks and return drivers differ according to business model, commodity exposure, project maturity and balance-sheet strength.

Woodside, Santos and Origin enter August with established cash-generating operations and major growth catalysts. Viva and Ampol are benefiting from improved refining conditions, although those earnings may prove cyclical. Whitehaven and Stanmore remain leveraged to metallurgical coal prices, while Karoon must restore operating consistency.

Among the developers, Amplitude has made the clearest progress through higher production and lower debt. Strike and Comet Ridge offer project potential but carry greater financing and delivery risk, while Carnarvon remains a cash-backed option on future Bedout Basin development. Macmahon provides a different route into the sector through contracted mining activity.

August 2026 is therefore less about broad energy-sector direction and more about company-specific execution. Production reliability, project delivery, cash conversion and funding discipline are likely to separate the businesses that can advance their strategies from those still dependent on favourable markets or fresh capital.