Australia's energy sector includes businesses exposed to oil and gas production, LNG, electricity generation, Retailing and energy-transition infrastructure. Santos (ASX:STO), Origin Energy (ASX:ORG) and AGL Energy (ASX:AGL) reported 2026 results that highlighted production growth, cash generation, electricity-market conditions and major project execution as important themes heading into FY27.

Santos remains primarily exposed to global oil and LNG markets. Origin combines domestic energy retailing and generation with Australia Pacific LNG and its Investment in Octopus Energy, while AGL operates electricity and gas retailing alongside a generation portfolio that is progressively adding batteries and other firming assets.

Santos

Santos reported sales Revenue of approximately USD 2.6 billion for the six months ended 30 June 2026. EBITDAX was around USD 1.6 billion, while statutory net profit after tax reached USD 355 million. Underlying Profit was approximately USD 397 million.

First-half production reached 45.6 million barrels of oil equivalent, representing an increase of 3%. Free Cash Flow from operations was approximately USD 378 million.

Liquidity stood at around USD 3.8 billion at the end of the period, while gearing excluding operating leases was 23.2%.

A key operating priority is the ramp-up of the Barossa gas project offshore the Northern Territory and the Pikka oil project in Alaska. Santos expects second-half production to be approximately 20% to 30% higher than first-half output as these projects contribute additional volumes.

Origin Energy

Origin reported FY26 statutory profit of approximately AUD 1.57 billion. Underlying profit was AUD 1.16 billion, while underlying EBITDA reached approximately AUD 3.22 billion.

Adjusted free cash flow was approximately AUD 2.07 billion. Net Debt to EBITDA was reported at around 1.6 times.

For FY27, Origin has guided to Energy Markets EBITDA of approximately AUD 1.55 billion to AUD 1.85 billion. APLNG production is expected to range between 625 and 670 petajoules, while total Capital Expenditure is expected to be approximately AUD 450 million to AUD 650 million.

AGL Energy

AGL reported FY26 statutory profit after tax of approximately AUD 756 million. Underlying EBITDA reached AUD 2.10 billion, while underlying net profit after tax was approximately AUD 631 million.

Underlying cash from Operating Activities before significant items, interest and tax reached around AUD 1.69 billion.

For FY27, AGL has provided underlying EBITDA guidance of approximately AUD 1.9 billion to AUD 2.2 billion. Underlying net profit after tax is expected to range from AUD 470 million to AUD 670 million.

Wholesale electricity pricing, generation reliability and execution of battery and firming projects will remain important operating measures through FY27.

Energy Sector Outlook

The three businesses face different market conditions despite operating within the broader energy sector.

Santos is most directly exposed to international oil and LNG pricing, meaning Commodity markets and project production volumes have a substantial influence on earnings.

Origin has a more diversified model. Domestic retailing and generation provide exposure to Australian electricity markets, while APLNG adds international LNG exposure. Octopus provides an additional technology and energy-retailing component.

AGL's operating performance is primarily linked to Australia's electricity market. Wholesale pricing, customer demand, generation availability and development of new firming infrastructure can influence earnings.

Energy-transition investment is also becoming increasingly relevant. Origin and AGL are developing renewable, storage and flexible generation capacity, while Santos continues to invest in major gas and oil projects.

Key Risks

Santos faces commodity-price and project-execution risk. Lower oil or LNG prices could affect revenue and cash generation, while delays or production issues at Barossa or Pikka could reduce expected output.

Origin is exposed to domestic electricity markets as well as LNG pricing through APLNG. Changes in retail regulation, electricity-market conditions or LNG prices could influence Earnings across different parts of the group.

AGL remains sensitive to wholesale electricity prices and generation reliability. The cost and timing of investments in batteries, firming capacity and broader portfolio transition can also influence financial performance.

Regulatory changes, energy policy and capital requirements remain broader considerations across the sector.

What Investors May Monitor Through the Rest of 2026

For Santos, production from Barossa and Pikka will provide further information on whether second-half output is tracking toward the expected 20% to 30% increase over the first half.

For Origin, Energy Markets performance, APLNG production and cash distributions, and developments within Octopus and Kraken will remain important operational measures.

For AGL, progress across battery and firming projects, wholesale electricity pricing and performance against FY27 earnings guidance will remain relevant.

The 2026 results show three different operating models within Australia's energy sector. Santos is increasing production through major oil and gas projects, Origin combines domestic energy markets with LNG and technology exposure, and AGL is balancing established generation and retail operations with investment in new firming infrastructure.