Utility companies have became exciting growth stocks – here's how to invest
Utility companies are changing in response to structural upheaval in the economy. That means opportunities in utility stocks for smart investors
The view that utility companies are a safe haven for cautious investors is out of date. Today's market is far more active and complex than it was even five years ago. New regulations and a strong push from government to improve national resilience are driving this shift.
While headlines dwell on short-term political disputes, the bigger story is that the utility sector is being rebuilt. The drivers of this trend include a massive surge in demand for electricity driven by the digital economy, a regulatory overhaul of the water sector and a new partnership between private capital and the state with a view to lowering risk.
Utility companies come in two main flavours
You can divide the utility companies into two distinct groups. First are the companies that own and operate the heavy assets. They run the water pipes, electricity wires and pylons that keep the country functioning. Second are the service providers. These focus on data, billing and the technology that links the grid to the customer. Each group presents a different investment case.
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The UK is at the start of a major, long-term infrastructure cycle and the work ahead is vast. The challenges range from meeting the energy demands of AI to modernising water networks. Both sides of the utilities sector are evolving in response and the market is recognising the growth potential of businesses once seen as dull.
Britain is currently overhauling its industrial strategy and utility companies have moved from the sidelines to the very centre of national-growth policy. For decades, investors treated the stocks in this sector as a set of bond proxies. The stocks were bought for their steady dividends and low volatility, but little else. A series of strategic shifts, driven by government policy, has changed that view.
The grid is the UK economy's main bottleneck
The first major shift is a crisis of capacity in our power networks. As John Pettigrew, the former chief executive of National Grid, has pointed out, the grid is becoming the main bottleneck for the economy. In 2023, he stated that the country needs to build seven times as much infrastructure in the next few years as it has in the past 30.
The problem is that the physical grid was not designed for the modern world. Engineers originally built most of this network to move power from large coal plants in the north down to the south. It was designed to serve houses and light up streets on a cold winter night. It cannot process the sudden, massive surge of electricity needed for the giant data centres that power the modern economy. This has created a backlog of projects waiting to be connected to the grid.
In 2026, the backlog of demand for data centres hit 50GW across 140 different sites. To put that number in perspective, the peak demand for electricity for the entire British grid is roughly 45GW. This means one single industry is now asking for more power than the entire nation uses on its coldest winter night when everyone is indoors using electricity. Global technology giants such as Amazon, Microsoft and Google are driving this demand. They have reclassified the UK as a primary growth zone, but they can't get the power they need because the old wires are at their breaking point.
National Grid has a multibillion-pound plan to reinforce the system. This includes building new substations and using advanced low-loss conductors. These technologies let the grid carry significantly more power without needing to put up entirely new pylons everywhere. This is a high-return path for growing assets because it avoids many of the planning headaches that come with new construction.
To handle the surge in demand, the government and the new National Energy System Operator have officially scrapped the old first-come, first-served model for grid connections. That old system let speculative projects sit on capacity for years, which stopped better-prepared data centres from getting online.
The new so-called Gate 2 reforms now prioritise projects based on how ready they are and how well they fit the national-energy plan. If a project misses its milestones, the operator immediately cancels its connection offer.
This allows National Grid to move from fixing things as they break to investing ahead of time and it can now justify building infrastructure before a data centre is even finished. This shortens the gap between spending money and earning a return, which is a clear win for shareholders.
The era of underinvestment in the water sector is over
A second major shift is happening in the water sector. The industry is moving away from a period of intense public and political tension. This was caused by years of underinvestment, resulting in frequent leakage and sewage spills that polluted rivers. The sector was essentially focusing on the short-term health of the pipes.
Adding to the pressure is the rise of AI; data centres do not just need electricity, they also require millions of gallons of water for cooling, making water companies a vital part of the tech infrastructure.
The 2026 White Paper, “A New Vision for Water”, is about making national infrastructure more resilient. The sector is starting a £104 billion investment programme for the five-year stretch that began in April 2025. This is nearly double what the companies spent in the previous five-year cycle. A single, integrated body that looks at both the environment and public health has replaced the previous fragmented oversight of Ofwat and the Environment Agency. This new regulator cares more about long-term results.
The Water Industry National Environment Programme is the main force behind this massive spending. It puts £24 billion specifically toward cutting sewage spills and cleaning up rivers. The programme requires companies to install thousands of monitors that track water quality around the clock. This ends the days when companies could essentially mark their own homework.
For investors, the focus has shifted from simple efficiency to whether these companies can actually finish such a mountain of work. The new rules introduce 25-year delivery plans to give pension funds the certainty they need by matching investment timelines to the long life of water pipes and plants.
Utility companies have a state-backed safety net
The third, and perhaps most important, shift is the emergence of a new partnership model between the state and utility companies. Historically, massive infrastructure projects were often considered too risky for private investors; if a project failed or stalled, the financial loss could be ruinous. To solve this, Great British Energy and the National Wealth Fund are now fully operational, reducing risk across the sector for investors.
With its £27.8 billion capital base, the National Wealth Fund has attracted more than £100 billion in private investment by offering debt guarantees and taking the first loss on higher-risk projects.
Essentially, the state acts as a buffer and makes projects safer for pension funds to back. This approach is especially valuable for emerging technologies such as long-duration energy storage and small nuclear reactors. Great British Energy also acts as a co-developer. It takes on the early risk of projects failing due to such things as environmental assessments. This leaves listed utilities free to focus on the high-margin work of building and running the assets. Because the state is now a partner in building core infrastructure, the investment risk to the whole system has dropped.
This state-backed safety net is also showing up in the retail energy market. The Great British Energy Local Power Plan provides cash for community energy projects that help keep the local grid in balance. This move toward decentralisation takes the weight off the distribution networks that the big utilities own. It lets these companies hold off on expensive physical upgrades and instead use digital tools to manage demand for power.
As more households pick up smart meters and tariffs that change based on the time of day, the whole system should work better. The shift to a data-heavy grid is turning the retail business into a high-margin tech platform. This change is a big reason why the outlook for the sector is better than it has been in years.
Key themes and plays for investors
The investment case for the listed companies is no longer just simply waiting for a dividend. It is about identifying which can most effectively turn this massive wave of state-backed capital into growing assets. For investors, the current market offers opportunities in companies that are becoming essential to the digital and green future of the country.
National Grid (LSE: NG) is the most obvious name to benefit from modernisation of the grid. As the sole owner of the transmission network across England and Wales, it is the physical gatekeeper of the emerging AI revolution. Under the RIIO-T3 regulatory framework that begins in April this year, the company has secured a real allowed return on equity of 6.12%. This is a decent improvement on the past, reflecting a need to attract more investment as well as the higher cost of funding the great grid upgrade.
Morgan Stanley recently pointed out that National Grid is moving away from being a low-growth utility and becoming a premium infrastructure investment. It highlighted that the company now has an asset growth target of 10% per year – well above the rate of inflation – and is heading toward earnings growth of 6%-8%. The firm is spending billions on 17 major projects to reinforce the north-to-south power corridors – essential for bringing power from offshore wind farms to the data-centre hubs.
The regulatory environment now allows for anticipatory investment. This means the firm can build ahead of demand. Doing so reduces the risk of stranded assets and ensures a steady stream of regulated income. As the asset base grows, the earnings potential of the company increases in a way that was not possible under previous rules. This shift from a yield-based valuation to a growth-based one is a key theme.
SSE (LSE: SSE) is another clear winner that has rebranded itself as a clean-energy champion. The firm is currently halfway through its ambitious investment plan, which involves spending £18 billion on offshore wind and transmission links. What makes SSE particularly interesting is how it has used the new state-utility partnership to lower its risk.
By working with Great British Energy, it can offload the early construction risks that used to weigh on its balance sheet, allowing it to maintain a strong credit rating while still pursuing aggressive expansion.
The partnership with the National Wealth Fund is also providing SSE with first-loss guarantees on complex projects. This is a significant advantage because it protects SSE from the cost overruns that often plague large infrastructure projects, lowering the overall cost of borrowing and raising returns for shareholders.
One could argue that SSE should be viewed as a high-quality infrastructure asset rather than a riskier power generator. This new reality hasn't escaped market attention – the shares have risen by 60% in just the last six months.
The winners in water and retail
In the water sector, the winners will be those who can navigate the new £104bn investment cycle. Severn Trent (LSE: SVT) and United Utilities (LSE: UU) are now working within a regulatory framework that puts long-term resilience ahead of short-term savings. This creates the potential for a large expansion in their regulated capital value, which is the base used to calculate their profits.
Severn Trent has already shown strong revenue growth following the latest tariff reset. The company is using a modular design for its assets, which helps keep construction costs low and delivery speeds high. This operational efficiency is a key driver of value.
United Utilities is also performing well, with a focus on its multi-billion-pound programme to reduce storm-overflow spills. Both companies are likely to benefit from outperformance payments if they hit their new environmental targets.
These companies offer a rare combination of inflation-linked returns and the security of a state-mandated investment cycle. The move to 25-year delivery plans provides the long-term visibility that institutional investors crave.
Centrica (LSE: CNA) and Telecom Plus (LSE: TEP) represent the technology-based, consumer-facing end of the sector. These companies do not own the heavy wires or pipes, rather the data and relationship with customers.
Centrica has moved far beyond its origins as a gas supplier. It is now a leader in flexible energy services, using smart data to help businesses and homes use power when it is cheapest. This capital-light model allows for high margins and strong cash flow without the debt burdens seen elsewhere in the industry. The company has a strong balance sheet and has been returning a lot back to shareholders through buybacks and dividends. Its move to a service-based model exposes it more to the economic cycle, but also provides the possibility of decent returns.
Telecom Plus, better known to consumers as Utility Warehouse, uses a similar approach by bundling energy with other home services. Its ability to use smart-meter data to lower wholesale costs has contributed to its higher levels of growth over the years.
By helping customers balance their own energy needs, it reduces the overall strain on the grid. This creates a win-win situation where the company earns higher margins and the customer pays lower bills. The scalability of this digital model is a significant advantage in a world where physical infrastructure is expensive and slow to build.
The heavy infrastructure is expensive and slow to build. The heavy infrastructure companies that form the core of this sector were stuck in a bit of a rut for a long time.
Over the last year or so, however, a clearer lead from the regulators has really lit a fire under their share prices. Because of that, most of the easy money has already been made, with some share prices rising by more than 50% in just a few months.
Still, we now have long investment horizons thanks to government policy. Patient investors who are happy to sit on these shares for years should see good rewards for the level of risk they are taking on.
National Grid is right at the front of this modernisation. It has gone from being a slow utility to becoming a much faster infrastructure business. It is never going to be a high-speed tech stock.
Nevertheless, its better growth outlook, along with those reliable dividends, offers a level of security that makes it one of the lower-risk stocks on the FTSE. It remains a vital part of Britain's energy future. For investors who wish to build a diverse portfolio of long-term, high-quality businesses, National Grid has a lot going for it.
The two big water companies, Severn Trent and United Utilities, have their own specific hurdles and opportunities to deal with. Both are updating their systems to meet new standards for clean water and service. They are getting a direct boost from the massive building phase the country is going through right now.
For investors looking for income, these are high-quality assets. They offer returns linked to inflation and benefit from a regulatory set-up that is far more predictable than the mess we saw in the early 2020s. There has always been little to choose from between the two as they tend to perform very similarly.
At the other end of the sector, Centrica and Telecom Plus offer a different mix of risks and rewards. These businesses depend much more on how good the management is and how the wider economy is doing. They also have to fight harder for customers in the retail market. However, they don't have to own all the heavy kit themselves.
This capital-light approach has let them keep up very high returns for shareholders through both buybacks and dividends. Telecom Plus, in particular, has shown it can grow even when things get tough by bundling home services into one efficient package.
Forced evolution brings opportunity
The utilities sector is entering a period of forced evolution. By clearing the infrastructure bottlenecks and establishing a clear partnership with the state, the industry is transitioning from being a defensive shelter to becoming a central pillar of national growth. For the patient investor, these companies offer a rare blend of stability and compounding growth, underpinned by the structural demands of the 21st-century economy.
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Jamie is an analyst and former fund manager. He writes about companies for MoneyWeek and consults on investments to professional investors.