Key Highlights

  • Ampol (ASX:ALD) and Viva Energy (ASX:VEA) operate across fuel supply, refining and convenience retail.
  • Stanmore Resources (ASX:SMR) produces metallurgical coal for steelmaking markets.
  • Macmahon Holdings (ASX:MAH) supplies Mining and civil contracting services.
  • GreenX Metals (ASX:GRX), Elixir Energy (ASX:EXR), Emperor Energy (ASX:EMP) and Omega Oil & Gas (ASX:OMA) face project-specific milestones.

The line between “energy” and “resources” on the Australian share market has always been blurry, and never more so than in September 2026. A single watchlist of ASX energy and resources stocks can now stretch from the fuel-refining giants that keep the nation’s cars and trucks moving, to metallurgical coal miners feeding Asian steel mills, to mining-services contractors, gas explorers and even a special-situation litigation play. This breadth is exactly what makes the sector so interesting for investors sifting through ASX top stocks September 2026.

This article examines eight such companies, each prominent this month: Ampol Limited (ASX:ALD), Viva Energy Group Ltd (ASX:VEA), GreenX Metals Limited (ASX:GRX), Stanmore Resources Ltd (ASX:SMR), Elixir Energy Limited (ASX:EXR), Macmahon Holdings Limited (ASX:MAH), Emperor Energy Ltd (ASX:EMP) and Omega Oil & Gas Limited (ASX:OMA). Together they span Downstream fuels, coking coal, mining services, and frontier and appraisal-stage gas — a genuine cross-section of the Australian energy and resources stocks universe.

The ASX energy and resources sector in September 2026

Where the pure oil and gas producers dominate headlines, the broader energy and resources sector tells a more diverse story in 2026. Two of Australia’s most important businesses in this space — Ampol and Viva Energy — are downstream fuel refiners and retailers, and their 2026 has been defined by a striking rebound in refining margins that drove record half-year profits. That refining windfall, linked to global Supply dynamics, is a very different Earnings driver from the commodity-price exposure of an Upstream producer.

At the same time, metallurgical coal — the steelmaking ingredient produced by Stanmore Resources — recovered through 2026 after a soft 2025, while mining-services contractor Macmahon Holdings rode buoyant activity across gold, lithium and coal to a record year. Elsewhere, gas appraisal in Queensland’s emerging Taroom Trough has attracted attention through Elixir Energy and Omega Oil & Gas, offshore Gippsland gas is being progressed by Emperor Energy, and GreenX Metals offers an unusual proposition centred on a major arbitration award against Poland alongside a copper and gold exploration pivot. In short, the ASX resources stocks in this article are exposed to very different value drivers, which is precisely why they merit individual analysis.

Australian and global market backdrop

The macroeconomic backdrop for these stocks in 2026 has been broadly supportive but uneven. Global refining margins — the single biggest earnings swing for Ampol and Viva Energy — surged during the year on tight product supply, delivering both companies record first-half results and sharply higher dividends. That dynamic can reverse quickly, so it should be understood as a cyclical tailwind rather than a structural shift. Metallurgical coal prices, central to Stanmore Resources, recovered from 2025 lows, though Queensland’s progressive coal Royalty regime continues to take a larger share of higher-priced tonnes.

Mining-services demand, which drives Macmahon, has remained firm across a diversified Commodity base, supporting a record order book. For the gas explorers and developers — Elixir Energy, Omega Oil & Gas and Emperor Energy — the dominant theme is the forecast east-coast gas supply gap, which has sustained investor interest in credible new sources of supply. And for GreenX Metals, the key variables are legal and jurisdictional rather than purely commodity-driven. Against this varied backdrop, the sections below examine each company in turn.

Refining margins, coal and gas: the trends that matter

Because this group spans such different businesses, it is worth isolating the specific market trends that drive each cluster. The most striking of 2026 has been the surge in refining margins. Refining margins measure the spread between the cost of Crude Oil and the value of the refined products — petrol, diesel and jet fuel — that a refinery produces. Tight global product supply pushed those margins to unusually high levels through 2026, and because Ampol and Viva Energy each operate one of Australia’s two remaining refineries, both captured an outsized earnings benefit. The Lytton refinery earned a Margin of USD 28.26 a barrel in the first half, and Geelong USD 21.10 a barrel, well above the levels of a year earlier. This is a cyclical, not permanent, tailwind, and margins can compress as quickly as they expanded.

Metallurgical coal follows a different rhythm. As the key input to steelmaking, its price tracks global steel Demand and supply disruptions, and after a soft 2025 the hard coking coal benchmark recovered through 2026, lifting Stanmore Resources’ realised prices even as cash costs and Queensland royalties rose. Mining-services demand, meanwhile, is a derivative of miners’ willingness to invest, and with gold, lithium and coal producers all active, Macmahon’s order book swelled to record levels. Finally, the domestic gas story — the forecast east-coast supply gap — is the common thread linking Elixir Energy, Omega Oil & Gas and Emperor Energy, each of which is trying to prove up or develop new supply for a market expected to tighten later this decade. Understanding which of these four trends drives a given stock is essential to reading its results.

Ampol Limited (ASX:ALD)

Company overview

Ampol Limited (ASX:ALD) is Australia’s largest transport-fuels and convenience company. It refines, imports, markets and distributes petroleum products, operates a national retail and convenience network, runs a large commercial fuels and infrastructure business, and owns the New Zealand Business Z Energy. Its Lytton refinery in Brisbane is the single largest swing Factor in its earnings.

Latest ASX announcements

Ampol reported full-year 2025 results on 23 February 2026 and first-half 2026 results on 24 August 2026. A major corporate development was its Acquisition of EG Australia’s convenience network: the Australian Competition and Consumer Commission approved the deal on 3 June 2026, subject to the divestment of 41 sites, with completion targeted for around 30 June 2026.

Financial performance

Ampol’s first-half 2026 result was transformed by the refining-margin rebound. It reported replacement-cost operating profit (RCOP) earnings before interest and tax of AUD 1,391.7 million, up from AUD 403.8 million a year earlier, and RCOP net profit after tax excluding significant items of AUD 857.2 million, up around 376%. Statutory net profit after tax was AUD 1,363.4 million, aided by an inventory gain. Net borrowings rose to AUD 3,523 million, reflecting EG Australia funding, and Leverage sat at 1.8 times adjusted net Debt to RCOP EBITDA. The company declared an interim Dividend of 185 cents per share fully franked. For full-year 2025, RCOP net profit was AUD 429 million and the full-year dividend 100 cents per share fully franked.

Operations and major assets

The Lytton refinery delivered a first-half 2026 refining margin of USD 28.26 a barrel, with production up 8.7%. Ampol’s Fuels and Infrastructure division was the largest earnings contributor, with the Lytton segment alone generating RCOP EBIT of AUD 533.4 million, while Convenience Retail earnings rose 12%. The EG Australia acquisition materially expands Ampol’s convenience footprint.

September 2026 developments

Ampol guided to full-year 2026 net Capital Expenditure of around AUD 600 million and continued to progress the EG Australia integration and its ultra-low-sulfur fuels project at Lytton. These are company statements and guidance.

Growth drivers and potential milestones

milestones include EG Australia completion and synergy delivery, Lytton refining margins, the ultra-low-sulfur fuels project, and the leverage trajectory after the EG deal.

Key risks

Risks include extreme earnings sensitivity to volatile refining margins and inventory swings given single-refinery exposure at Lytton, higher net debt after EG, integration risk, and the structural transition away from liquid fuels.

What investors may watch next

Viva Energy Group Ltd (ASX:VEA)

Company overview

Viva Energy Group Ltd (ASX:VEA) supplies around a quarter of Australia’s liquid fuels. It operates the Shell-brand retail alliance, the Geelong refinery, a large commercial and industrial fuels business, and — following its acquisition of OTR and the former Coles Express network — a major convenience-retail operation.

Latest ASX announcements

Viva reported full-year 2025 results on 24 February 2026 and first-half 2026 results on 24 August 2026. In April 2026 a fire at the Geelong refinery temporarily curbed output, with production recovering to more than 90% of normal by June 2026.

Financial performance

Like Ampol, Viva benefited from the refining windfall. For the first half of 2026 it reported group EBITDA on a replacement-cost basis of AUD 774.4 million, up 154%, and underlying replacement-cost net profit after tax of AUD 371.1 million, close to a five-fold increase. Statutory net profit was AUD 452 million. Net debt fell to AUD 1.72 billion from AUD 2.075 billion at the end of 2025, and the company lifted its Interim Dividend to 7.73 cents per share fully franked. Convenience and Mobility segment EBITDA rose 86%.

Operations and major assets

The Geelong refinery delivered a first-half 2026 refining margin of USD 21.10 a barrel, up sharply from USD 8.20 a year earlier. Viva’s convenience strategy, converting stores to its OTR and Reddy Express brands, is the key structural growth thesis, with top converted stores reporting substantial sales uplifts. The company operates around 1,300 service stations and more than 900 convenience stores.

September 2026 developments

Viva reaffirmed full-year 2026 capital expenditure guidance of AUD 350–400 million and flagged further OTR store conversions in the remainder of the year, targeting a gearing level near 2.0 times by the end of 2027. These are company guidance figures.

Growth drivers and potential milestones

milestones include Geelong refining margins, the pace and margin uplift of OTR conversions, net-debt reduction, and Geelong energy-infrastructure plans.

Key risks

Risks include single-refinery margin Volatility and operational risk at Geelong, as the April 2026 fire illustrated, integration and execution risk on the convenience roll-out, elevated leverage relative to peers, and the fuel-demand transition.

What investors may watch next

Its refining margins and OTR execution are the stories to follow.

GreenX Metals Limited (ASX:GRX)

Company overview

GreenX Metals Limited (ASX:GRX) is a dual-listed resources company whose value is dominated by a major arbitration award against Poland, alongside a pivot toward copper and gold exploration in Europe and Greenland. It is pre-revenue.

Latest ASX announcements

The pivotal development came on 9 January 2026, when the Singapore International Commercial Court enforced GreenX’s arbitration award against Poland — valued at around USD 490 million including interest — and rejected Poland’s argument that European Union law overrides the award. In May 2026 the company announced an exploration target at its Tannenberg copper-silver project in Germany.

Financial performance

As a pre-revenue explorer, GreenX treats the arbitration award as a contingent asset rather than cash on its balance sheet. It raised an AUD 13.6 million placement, lifting cash to roughly AUD 14.6 million to fund 2026 exploration. The company has stated it intends to return the majority of net award proceeds to shareholders after costs, funder obligations and taxes.

Operations and major assets

The arbitration award stems from GreenX’s legacy Polish coal projects, Jan Karski and Debiensko. The tribunal awarded, on an alternative basis, roughly £252 million under one treaty and £183 million under another, with interest accruing. On the exploration side, the Tannenberg project in Germany carries an early-stage exploration target, and GreenX is also active at the Eleonore North gold-antimony-tungsten project and an Arctic Rift copper joint venture in Greenland.

September 2026 developments

Through 2026 GreenX has pursued enforcement of the award while advancing its exploration portfolio. Poland is pursuing set-aside applications, which introduces timing uncertainty around any cash recovery.

Growth drivers and potential milestones

milestones include actual cash collection of the award, the outcome of Poland’s set-aside applications, any settlement, a defined Shareholder capital-return mechanism, and drilling results at Tannenberg, Eleonore North and Arctic Rift.

Key risks

Risks are unusual for a resources stock: enforcement and collection risk, since an award is not cash and Poland could delay payment; litigation-funder and tax obligations that reduce net proceeds; early-stage exploration uncertainty; and single-issue valuation concentration.

What investors may watch next

The path to actually collecting the Poland award is the decisive variable.

Stanmore Resources Ltd (ASX:SMR)

Company overview

Stanmore Resources Ltd (ASX:SMR) is a Queensland-focused metallurgical coal producer operating in the Bowen Basin, majority-owned by Indonesia’s Golden Energy and Resources. It reports in US dollars and grew materially via its 2022 acquisition of the BHP-Mitsui coal assets.

Latest ASX announcements

Stanmore reported full-year 2025 results on 23 February 2026 and first-half 2026 results on 24 August 2026, the latter accompanied by a debt refinancing. It submitted an environmental impact statement for its Isaac Downs Extension in June 2026.

Financial performance

For the first half of 2026, Stanmore reported coal sales Revenue of USD 978 million, up from USD 867 million, and underlying EBITDA of USD 174 million, with Operating Cash Flow of USD 176 million. It posted a statutory loss after tax of USD 44 million, pressured by Depreciation and coal-price levels, and declared no interim dividend, citing capital-allocation priorities. Net debt was a modest USD 72 million, and a post-period refinancing lifted its term Facility to USD 250 million while removing scheduled annual repayments. For full-year 2025, revenue was USD 1.88 billion and the company paid a final dividend of USD 0.089 per share fully franked despite a statutory loss.

Operations and major assets

Stanmore’s key mines are South Walker Creek, Poitrel and the Isaac Plains complex. First-half 2026 saleable production was 6.5 million tonnes, with an average selling price of USD 153 a tonne, up from USD 132, though free-on-board cash costs rose to USD 101 a tonne. Its growth Options include the Isaac Downs Extension and the Eagle Downs hard coking coal development.

September 2026 developments

Stanmore reaffirmed full-year 2026 guidance of 12.8–13.4 million tonnes of saleable production, cash costs of USD 98–103 a tonne and capital expenditure of USD 85–95 million, with management emphasising “value and cash flow over volume.” These are company guidance figures.

Growth drivers and potential milestones

milestones include hard coking coal price recovery, Isaac Downs Extension permitting and Eagle Downs decisions, unit-cost control, the benefits of the refinancing, and any dividend reinstatement.

Key risks

Risks include high leverage to volatile metallurgical coal prices, rising cash costs, Queensland’s progressive coal royalty regime, single-commodity concentration, and financing and ESG headwinds for coal.

What investors may watch next

Elixir Energy Limited (ASX:EXR)

Company overview

Elixir Energy Limited (ASX:EXR) is a small-cap gas explorer and appraiser whose strategic focus has shifted decisively from Mongolia to Queensland. It is now primarily an onshore gas appraisal company in the Taroom Trough of the deep southern Bowen Basin, where its flagship is Project Grandis.

Latest ASX announcements

Through 2025 and 2026 Elixir advanced its Queensland appraisal, including the Lorelle-3H well on a permit where it is earning a 50% interest under a farm-in with a Santos subsidiary. In February 2025 it farmed out its Mongolian Assets to Gobi Terra, largely removing its funding obligations there.

Financial performance

Elixir is a pre-revenue explorer. A recent quarterly update cited cash of around AUD 10 million and a stable financial position, supported by Australia’s research-and-development tax incentive on qualifying appraisal expenditure. It pays no dividend.

Operations and major assets

Project Grandis holds an independently certified 2C contingent resource, and the Santos farm-in permits have added further certified resource, taking Elixir’s combined Taroom Trough position to roughly 3.5 trillion cubic feet of contingent resource on the company’s figures. The Lorelle-3H well recovered dual-phase flows during initial testing, with favourable gas quality, before testing was paused to install tubing. Its Mongolian coal-bed methane interest is now an option-style residual via the Gobi Terra deal.

September 2026 developments

Elixir’s September-quarter drilling reported substantial reservoir results and continued Taroom Trough appraisal. The company’s strategy is to de-risk the resource, leverage the Santos Partnership as validation, and progress toward commercialisation, though it issues no formal production guidance.

Growth drivers and potential milestones

milestones include sustained Lorelle-3H flow-test results, results from the Santos-permit earning well, any maiden reserves booking, further resource certification, and potential gas-sales agreements.

Key risks

Risks include appraisal and flow-rate risk in a deep, tight play, funding and dilution risk as a pre-revenue micro-cap, dependence on the Santos joint-venture timetable, and the pre-commercial status of the Taroom Trough.

What investors may watch next

Macmahon Holdings Limited (ASX:MAH)

Company overview

Macmahon Holdings Limited (ASX:MAH) is one of Australia’s larger listed diversified mining-services contractors, providing surface mining, underground mining and civil services across Australia and South-East Asia, with client commodities spanning gold, lithium, copper-gold and metallurgical coal.

Latest ASX announcements

Macmahon reported a record full-year 2026 result around 18 August 2026, for the year to 30 June 2026, and continued to build its order book through new contract wins including work at the Byerwen coal mine and a New Zealand gold project.

Financial performance

For full-year 2026, Macmahon reported revenue of AUD 2.6 billion, up 8%, underlying EBITDA of AUD 393.8 million, and statutory net profit after tax of AUD 101.1 million, up 37%. Underlying net profit rose 12% to AUD 114.8 million, and net debt fell to AUD 111.1 million, reducing gearing to 13.1%. The company declared total 2026 dividends of 2.20 cents per share, up 47%, with a Record Date of 21 September 2026 and payment on 12 October 2026.

Operations and major assets

Macmahon’s work spans surface mining, an expanding underground division and mining-services and civil work, with a diversified client base. Its order book stood at AUD 5.9 billion, with around AUD 2.2 billion of work secured for the 2027 financial year and a tender pipeline of roughly AUD 25 billion.

September 2026 developments

Macmahon issued full-year 2027 guidance of revenue of AUD 2.85–3.05 billion and underlying EBIT of AUD 205–225 million. Notably, its shares fell around 8.6% on results day despite the record numbers, a “sell the news” reaction as investors weighed margin sustainability and a softer free-cash-flow line. This guidance is a company statement.

Growth drivers and potential milestones

milestones include conversion of the large tender pipeline into secured work, delivery against 2027 guidance, further underground contract wins, continued deleveraging, and progressive dividend growth.

Key risks

Risks include cyclical mining-services demand, labour and equipment cost inflation, project-execution and contract-conversion risk, and customer and geographic concentration in Australia and Indonesia.

What investors may watch next

Emperor Energy Ltd (ASX:EMP)

Company overview

Emperor Energy Ltd (ASX:EMP) is a Sydney-based micro-cap whose flagship is the wholly owned Judith gas field in the offshore Gippsland Basin off Victoria, positioned to help address the east-coast gas supply gap using existing infrastructure.

Latest ASX announcements

During 2026 Emperor announced a major resource upgrade at Judith, validated by independent assessment, secured a jack-up rig for its planned Judith-2 appraisal well, and completed a AUD 17.5 million Placement in March 2026 at AUD 0.12 per share.

Financial performance

Emperor is a pre-revenue explorer, and the AUD 17.5 million March 2026 placement is its key recent Liquidity event. Full audited financial line items were not disclosed in the sources reviewed. It pays no dividend, and the company is concurrently pursuing gas pre-sales or farm-in arrangements to co-fund the appraisal program.

Operations and major assets

The Judith gas field, in permit VIC/P47 around 40 kilometres offshore from the Orbost gas plant, carries an independently assessed 2C contingent resource of roughly 166 billion cubic feet and substantial prospective upside. Emperor plans to leverage existing offshore Gippsland infrastructure and has a long-standing relationship with APA Group for processing and pipeline design. Drilling of the Judith-2 appraisal well is anticipated around the first quarter of 2027.

September 2026 developments

Emperor’s near-term task is to fund and prepare the Judith-2 appraisal well while advancing environmental approvals and pursuing a farm-in or pre-sale. Its long-term aspiration is production of up to around 45 petajoules a year by 2031, a strategic target rather than booked guidance.

Growth drivers and potential milestones

milestones include securing a farm-in partner or gas pre-sales, environmental approvals, the eventual Judith-2 appraisal result, and east-coast gas-price and policy tailwinds.

Key risks

Risks include the pre-revenue, single-asset nature of the company, a capital-intensive and approval-sensitive drilling program still around 18 months away, funding and dilution risk, offshore regulatory risk, and reliance on third-party infrastructure.

What investors may watch next

Omega Oil & Gas Limited (ASX:OMA)

Company overview

Omega Oil & Gas Limited (ASX:OMA) is a Queensland gas and light-oil explorer whose flagship is the Canyon Project in the Taroom Trough of the deep southern Bowen Basin — the same emerging play where Elixir Energy is active. Major shareholders include the Flannery family and the Tri-Star Group.

Latest ASX announcements

Omega has run an active drilling campaign, with the Canyon-3 well drilled in August 2026 delivering a thick oil-and-gas-bearing interval and extending the play, and the Canyon-4 well spudded around September 2026 with results expected near the end of the month — a live near-term milestone as of this article.

Financial performance

Omega is pre-revenue, with its value tied to drilling results and its balance sheet. It raised AUD 46.0 million in September 2025 and a further AUD 60 million in April 2026 at AUD 0.84 per share, and describes itself as fully funded for a multi-well 2026 program. It pays no dividend.

Operations and major assets

The Canyon Project targets an over-pressured deep Permian sandstone sequence, with cited contingent resources of roughly 1.73 trillion cubic feet (2C) and 4.50 trillion cubic feet (3C). The Canyon-1H well previously tested light crude and gas, and Canyon-3 intersected around 170 metres of aggregate net pay across stacked reservoirs, confirming reservoir continuity over a wide area. The company was also awarded new Taroom Trough acreage in 2026.

September 2026 developments

The imminent Canyon-4 result is the standout near-term event, and Omega targets an initial resource upgrade and maiden reserves estimate in the fourth quarter of 2026. These are company targets.

Growth drivers and potential milestones

milestones include the Canyon-4 result, subsequent wells in the 2026–27 program, extended horizontal-well flow tests, the planned resource upgrade and maiden reserves, and potential farm-in interest.

Key risks

Risks include exploration and appraisal risk in a deep, over-pressured play still being proven up, large future capital requirements, execution and cost risk on deep wells, and the pre-reserves, pre-production status. Its substantial share-price run also raises valuation and expectations risk.

What investors may watch next

Comparing the eight companies

These eight ASX energy and resources stocks divide into clear categories. Ampol and Viva Energy are large downstream refiners and retailers, both enjoying a refining-margin windfall that drove record first-half profits and sharply higher dividends — though both remain exposed to the volatility of that same margin. Stanmore Resources is a mid-cap coking-coal producer generating cash but sensitive to coal prices, and Macmahon Holdings is a diversified, dividend-paying mining-services contractor with a record order book.

The remaining four are pre-revenue and speculative in nature. Elixir Energy and Omega Oil & Gas are both Taroom Trough gas explorers, with Omega substantially larger and better funded but Elixir carrying the credibility of a Santos partnership. Emperor Energy is a micro-cap offshore gas explorer with a defined resource but a capital-intensive path ahead. GreenX Metals is unique — a litigation-driven special situation with an exploration option, whose value depends on collecting an arbitration award rather than on commodity prices.

For readers weighing ASX resources stocks, the practical framing is by earnings Maturity and value driver. Ampol, Viva, Stanmore and Macmahon are established, cash-generating, dividend-paying businesses. Elixir, Omega, Emperor and GreenX are pre-revenue, each dependent on a specific milestone — a flow test, a drilling result, a funding milestone or a legal enforcement — with correspondingly higher risk.

On dividends specifically, the contrast is stark. Ampol’s 185-cent interim, Viva’s 7.73-cent interim, Macmahon’s growing 2.20-cent full-year payout and Stanmore’s prior fully franked distribution mark out the income names, though Stanmore withheld an interim dividend for the first half of 2026 to preserve balance-sheet flexibility. The four pre-revenue explorers pay nothing, directing every dollar toward drilling, appraisal or, in GreenX’s case, litigation and exploration. As a rule of thumb across this list, the larger and more established the company, the more its returns come from dividends and steady cash flow, while the smaller names offer milestone-driven, higher-risk exposure.

Potential developments to watch through the remainder of 2026

The closing months of 2026 offer a full calendar of potential milestones across this group. For Ampol, completion and integration of the EG Australia acquisition and the direction of Lytton refining margins are the key markers; for Viva Energy, the pace of OTR store conversions and continued deleveraging sit alongside Geelong’s margins and operational reliability after the April fire. Stanmore Resources’ progress on the Isaac Downs Extension approval and any move on Eagle Downs, together with coking-coal prices and a possible dividend reinstatement, will shape its second half, while Macmahon’s conversion of its AUD 25 billion tender pipeline and delivery against 2027 guidance are the focus after its record year.

Among the explorers, Omega Oil & Gas’s Canyon-4 result around the end of September and its planned fourth-quarter resource upgrade are the most immediate events, followed by Elixir Energy’s resumed Lorelle-3H flow testing and any maiden reserves progress. Emperor Energy’s efforts to secure a farm-in or gas pre-sale ahead of its 2027 Judith-2 well, and GreenX Metals’ pursuit of cash collection on the Poland award amid Poland’s set-aside applications, round out a period rich in potential news. As always, these are potential milestones, not certainties, and their outcomes remain genuinely uncertain.

Final summary

The eight companies profiled here — Ampol Limited (ASX:ALD), Viva Energy Group Ltd (ASX:VEA), GreenX Metals Limited (ASX:GRX), Stanmore Resources Ltd (ASX:SMR), Elixir Energy Limited (ASX:EXR), Macmahon Holdings Limited (ASX:MAH), Emperor Energy Ltd (ASX:EMP) and Omega Oil & Gas Limited (ASX:OMA) — showcase the sheer diversity of the Australian energy and resources sector in September 2026. From refining windfalls and coking-coal cash flows to mining-services records, frontier gas appraisal and a landmark arbitration award, each is driven by a distinct set of forces.

For anyone tracking ASX top stocks September 2026 in the energy and resources space, the message is that generalisations are of limited use: reporting periods, guidance, funding status and individual milestones matter far more than the sector label. This article is general information only.