Rising marine heatwaves, jellyfish swarms and stress on coastal infrastructure are no longer distant science stories. They are starting to affect fisheries, tourism and even nuclear power plants in Europe. For investors, this creates a fresh set of risks and potential bright spots as money follows solutions that can help assets cope with changing oceans. This article walks through three stocks exposed to these trends from our Climate Adaptation Infrastructure & Services screener.
The three stocks covered below are only a starting sample from this theme. The full screen surfaced 14 more companies with equally compelling climate adaptation narratives that are not covered in this article. To identify and analyze those additional coastal and marine resilience plays, head straight into the Climate Adaptation Infrastructure & Services screener.
Ashtead Technology Holdings (LSE:AT.)
Overview: Ashtead Technology Holdings rents subsea equipment and provides inspection, monitoring and maintenance services for offshore energy projects, which directly supports the resilience of marine exposed infrastructure. Its tools and services help offshore wind, oil and gas and other coastal assets keep operating safely in harsher and less predictable ocean conditions.
Operations: Ashtead Technology Holdings generates about £203 million of revenue from oil well equipment and services, with around £136 million from Europe and the rest spread across the Americas, Middle East and Asia Pacific.
Market Cap: £346 million
Ashtead Technology Holdings gives you exposure to the nuts and bolts of keeping offshore assets working as marine risks rise, from heatwaves to more frequent disruptions around coastal infrastructure. The company focuses on subsea inspection and monitoring, which is central to extending the life of offshore wind and oil and gas installations as regulators and insurers scrutinise asset integrity. Earnings and return metrics provided suggest efficient use of capital, while some analysts see potential upside based on valuation and discounted cash flow work. The main question mark is its higher debt load, which could limit how fast it expands its rental fleet if financing conditions tighten. With first half 2026 results due on 1 September 2026, the next update could be important for sentiment around this climate adaptation angle.
Accelerating demand for subsea resilience puts Ashtead Technology Holdings in an interesting spot; however, its higher debt and valuation questions leave plenty unresolved. Get the full picture through the 5 key rewards and 1 important warning sign
Build your own climate adaptation shortlist
Ashtead Technology Holdings and the other two stocks in this article all came from a single screener, but the real value comes when you start shaping your own filters. Use our customisable Screener to mix valuation, growth, quality and risk checks in a way that fits your approach, or jump straight into our curated Investing Ideas.
Porvair (LSE:PRV)
Overview: Porvair is a filtration and environmental technology company whose water analysis instruments, filters and treatment systems can help coastal power plants, utilities and industrial sites manage intake quality and biofouling as marine heatwaves and jellyfish swarms put more stress on cooling and process water. Alongside these coastal uses, Porvair also serves aerospace, laboratory diagnostics and molten metal filtration markets, giving it a diversified base tied to specialist, high specification applications.
Operations: Porvair generates about £82.9 million of revenue from Aerospace & Industrial activities, £69.1 million from Laboratory products and £51.9 million from Metal Melt Quality filters, with a small inter segment adjustment of £1.4 million.
Market Cap: £405 million
Porvair provides exposure to climate adaptation through filtration and monitoring technology that coastal and industrial customers already use, supported by a history of positive earnings growth, improving margins and a steadily rising dividend. The company focuses on niche filters and lab instruments where reliability and regulatory demands can support pricing power. Recent acquisitions and capital expenditure projects are intended to lift efficiency and broaden the product range. At the same time, reliance on acquisitions, upcoming infrastructure spending and a funding structure built on external borrowings all introduce financial and execution risks. Activist investors have pushed for strategic options, and management presents net zero as a source of opportunity as well as risk. Investors watching Porvair now may see an important potential inflection in how this filtration specialist is valued in a warming ocean world.
Porvair’s earnings, margins and dividend record are already on many radars, yet its filtration role in stressed coastal infrastructure still feels underappreciated. See how that story stacks up in the analysis report for Porvair
James Fisher and Sons (LSE:FSJ)
Overview: James Fisher and Sons is a specialist marine services company that supports offshore energy, defence and maritime transport projects, including inspection, decommissioning and offshore wind construction that help coastal and marine exposed infrastructure stay operational in tougher ocean conditions. Its work ranges from subsea engineering and cable services to submarine rescue and coastal shipping, giving it a broad role across critical marine supply chains.
Operations: James Fisher and Sons generates about £158.9 million of revenue from Energy activities, £88.8 million from Defence and £147 million from Maritime Transport, with a small inter segment adjustment of £0.3 million.
Market Cap: £230.2 million
James Fisher and Sons provides focused marine exposure at a time when coastal infrastructure faces pressures from warming seas, rising jellyfish swarms and tighter safety rules. The company remains loss making and dependent on external borrowing to fund its turnaround. It is concentrating on higher margin niches such as offshore wind services, submarine rescue and bubble curtain technology that reduces underwater noise, while working to simplify the portfolio and improve the performance of units including renewables and Fendercare. Analyst expectations of a potential move into profit and higher margins sit alongside risks related to defence budget cycles, oil and gas project timing and leverage. With scheduled updates from its analyst day and the H1 2026 results on 8 September 2026, investors will receive further information on the progress of this coastal resilience strategy.
James Fisher and Sons is aiming to turn marine services into a higher margin coastal resilience story, yet the full risk and reward mix is not reflected in headlines. Get the complete picture through the analyst forecasts for James Fisher and Sons
Seeking Alternatives Before The Crowd
Some of the most interesting stocks move from quiet to crowded fast. Discover fresh ideas while they are still under the radar for now and consider them before they become widely followed.
- Identify potential breakouts with strong cash generation before momentum develops by scanning the curated 9 high quality undervalued stocks and reviewing which fundamentals still appear overlooked.
- Follow structural themes around automation and efficiency by checking the hand picked companies inside the 37 robotics and automation stocks, before their stories become widely reflected in prices.
- Monitor early leaders in digital assets infrastructure with the focused 20 cryptocurrency and blockchain stocks, so you are prepared if interest and volumes increase.
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.
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