The launch of the world’s largest commercial sand battery in Finland has pushed thermal energy storage from a niche concept into a real world test of what comes next for renewable power, heating, and traditional fuel supply chains. For investors, the news underscores how quickly expectations can shift for companies tied to lithium, wood based fuels, and large scale district energy systems. This article examines three stocks with exposure to the sand battery story, one that could be positioned to benefit and two that may face pressure, to help you consider where this transition might matter most in your portfolio.

Fortum Oyj (HLSE:FORTUM)

Overview: Fortum Oyj is a Nordic energy utility that generates and sells low carbon electricity and heat, using hydro, nuclear, wind and solar assets alongside district heating and cooling networks, while also supplying power, gas and digital energy services to households and businesses. It is active across the energy value chain from large scale generation and trading to retail supply and battery recycling.

Operations: Fortum generates most of its revenue from the Generation segment at about €3.5b and Consumer Solutions at about €3.5b, with smaller contributions from Other Operations at about €0.2b and reported adjustments reducing the consolidated total.

Market Cap: €18.4b

Fortum sits at the crossroads of two big shifts: cleaner power and the search for energy storage options that do not depend on lithium, which makes the sand battery story especially relevant. The company already runs low carbon generation, district heating and electricity based heating assets, and management talks about building up to 2.5 gigawatts of new flexibility services, so thermal storage could plug straight into an existing platform. At the same time, investors need to weigh weather and nuclear availability risks, modest forecast earnings growth and a P/E above many European utility peers. With a solid balance sheet, cost savings and a growing renewables pipeline, the key consideration is whether the current price reflects both the opportunities and these constraints.

Fortum’s push into low carbon power, flexibility services and sand style thermal storage is only half the story; the real question is what the 2 key rewards and 1 important warning sign reveals about the trade off hiding in the background

Albemarle (ALB)

Overview: Albemarle is a global chemicals company that supplies lithium compounds for batteries used in electric vehicles, grid storage and electronics, alongside a broad set of bromine and specialty lithium products that support sectors such as energy, mobility, construction and pharmaceuticals.

Operations: Albemarle generates most of its revenue from Energy Storage at about US$3.1b, with Specialties contributing about US$1.4b and a segment adjustment of about US$1.0b affecting the consolidated total.

Market Cap: US$13.8b

Albemarle sits in a tough spot for this thermal storage transition. It is tightly linked to lithium demand from batteries just as sand based systems and other non lithium options start to attract attention as cheaper, simpler ways to back up renewables. Analysts still expect strong earnings growth and improving returns, and see the stock trading well below some fair value estimates, yet the company is currently loss making, carries funding risk and faces pressure from low lithium prices, potential oversupply and insider selling. For investors, the uncomfortable question is how much downside remains if alternatives like sand batteries chip away at the growth story that underpins Albemarle’s premium positioning in energy storage.

Albemarle’s lithium story is being quietly tested by cheaper sand based storage, while the stock leans on growth hopes and fair value arguments. Before sentiment shifts again, read the 2 key rewards and 2 important warning signs

Valmet Oyj (HLSE:VALMT)

Overview: Valmet Oyj supplies the pulp, paper and energy industries with production lines, process technologies, automation systems and lifecycle services that help mills run more efficiently, use fewer resources and reduce emissions. Its offering ranges from full pulp and board plants to valves, pumps, control systems and digital tools for monitoring and predictive maintenance, serving customers across Europe, the Americas and Asia.

Market Cap: €5.0b

Valmet deserves close attention because it sits at the center of the sand battery story as a key supplier to biomass and wood chip heating, just as early projects in Finland show district heating emissions can be cut 70% while wood use drops 60%. At the same time, the company is reshaping itself with a new operating model, significant restructuring and a possible breakup of its Biomaterial Solutions and Process Performance businesses, while addressing dividend coverage questions and earnings that have been affected by one off losses. Even with analysts expecting profit growth and mergers such as Severn Group adding flow control exposure, a key question is whether Valmet’s capital-intensive pulp and bioenergy focus can adapt as heat storage solutions evolve away from wood-based fuels.

Valmet’s pulp and bioenergy focus is being quietly tested as heat storage shifts away from wood based fuels. The real tension sits in the restructuring, dividend coverage questions and capital intensity. Before this story accelerates in either direction, the 3 key rewards and 3 important warning signs

Take Control of Your Investment Journey

If Fortum Oyj or any of these companies have caught your attention, register for FREE with Simply Wall St and add your companies to a Watchlist to monitor the share price against the fair value and track any new developments as they happen. Once you've made your move, manage your holdings with our Portfolio Command Center that filters out the noise to deliver only the most critical, actionable updates. Throughout your journey, our Community allows you to filter the best ideas from thousands of investor perspectives. By uncovering hidden catalysts and risks early, you'll accelerate your decision-making and stay one step ahead of the market.

Seeking Alternatives Before The Crowd Moves

Fresh opportunities do not sit still, and the stocks with real breakout potential can fly once the momentum is caught. Scan these under the radar ideas while it matters and consider acting before conditions change.

• Identify under followed companies with strong cash generation and resilient balance sheets by scanning the 247 high quality undervalued stocks before others notice any value gap closing.
• Focus on resilient cash payers by running the 458 dividend fortresses and concentrating on high yield companies while prices are still dropping or flat, rather than waiting until after a rebound.
• Explore secular infrastructure themes by reviewing the 35 power grid technology and infrastructure stocks and looking at companies positioned around grid upgrades while they may still be under the radar.

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.