A renewed US naval blockade has stalled Iran’s oil exports and pushed Brent crude to $83.55 a barrel, putting fresh focus on large oil and gas producers. Supply worries can quickly reshape pricing power and investor sentiment. This creates both openings and traps. This article walks through three stocks exposed to this news and explains how today’s shock could matter for your portfolio decisions.

The three stocks covered below are just a sample, and the full screen surfaced 27 more large oil and gas producers with equally compelling stories that are not covered in this article. To go straight to the source, use the Energy Sector - Oil & Gas Producers screener to identify, filter, and analyze the companies that best fit your own thesis.

Peabody Energy (BTU)

Peabody Energy is a long established coal producer supplying thermal coal to power utilities and metallurgical coal to steelmakers, with mines across Australia and the US. Revenue is spread across seaborne metallurgical coal at about $1.2b, the Powder River Basin at about $1.1b, seaborne thermal coal at about $876 million, and other US thermal operations at about $731 million, with a small corporate and other contribution. The company currently has a market cap of roughly $2.9b.

Peabody Energy stands out because it sits at the intersection of tight global fuel markets, including spillover effects from higher oil prices, and ongoing pressure on coal from decarbonization policies. The company has sizable seaborne exposure, which management says is already feeling stronger thermal coal pricing as competing fuels such as LNG become more expensive. It is still working through issues such as losses in Q2 2026 and higher costs at the Centurion mine. For investors, the mix of forecast earnings recovery, an active capital return program through dividends and buybacks, and US policy support for both coal and rare earth projects makes this a stock that rewards closer inspection, especially with clear regulatory and transition risks still in play.

Peabody Energy sits at the intersection of fuel scarcity, coal policy pressure, and capital returns, yet most investors only see one side of the story. Get the full picture in the analysis report for Peabody Energy

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Peabody Energy and the two other stocks in this article all surfaced from the same Simply Wall St filters, which is exactly where you can start shaping your own ideas. Use our flexible Screener to mix valuation, balance sheet, risk and income filters to suit your approach, or jump straight into our curated Investing Ideas for ready made shortlists.

Amplitude Energy (ASX:AEL)

Amplitude Energy is an Adelaide based oil and gas producer focused on natural gas and low cost oil across southeast Australia, with assets in the Gippsland and Otway basins and the Cooper Basin. The bulk of its A$275.8 million in revenue comes from South East Australia at about A$267.8 million, with a smaller A$8 million contribution from the Cooper Basin, and the company is fully exposed to Australian markets. Amplitude Energy currently has a market cap of about A$451.3 million.

Amplitude Energy gives you direct exposure to movements in oil and gas prices at a time when the Iran blockade is tightening global supply and affecting Brent pricing. Its plants are located close to major East Coast demand centers where gas is increasingly used to back up the power grid. The story is not without tension, since the company is still loss making, has relied on external funding and has diluted shareholders, and execution risk hangs over projects such as the East Coast Supply Project and Otway drilling. However, analysts see earnings improving, margins rebuilding on more reliable throughput and cost reduction work, and the stock screens as heavily undervalued with positive targets. This is one reason this mid cap producer frequently appears on investor shortlists when energy security moves back into the spotlight.

Amplitude Energy’s history of loss making operations, shareholder dilution and project execution risk contrasts with a stock that currently screens as heavily undervalued with positive targets. Get the full context in the analysis report for Amplitude Energy

PetroTal (TSX:TAL)

PetroTal is a Houston based oil and gas producer focused on the 100% owned Bretaña Norte oil field in Peru’s Marañón Basin, where it acquires, develops and produces crude for export. The company is a pure play on Peruvian crude, with current operations concentrated in this flagship block, and it has a market cap of about CA$451 million.

PetroTal sits right in the path of the Iran blockade story because it sells crude that is priced off Brent, so any tightening in global supply directly affects its realized prices. The company has already shown how higher Brent can lift net operating income, yet recent results also flag real risks, including weaker profit margins, a large one off loss and dependence on river and pipeline routes that can be disrupted. For investors, that mix of Brent linked upside, operational growing pains and Peru specific political and logistics risk is exactly what makes PetroTal worth a closer look rather than a quick judgment.

PetroTal’s Brent linked upside and Peru specific risks often get reduced to headlines, yet the real story sits in the trade off between pricing power and fragile logistics. See how the analysis report for PetroTal could reshape your view of that balance.

Curious About Alternative Stock Paths?

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.