Growing Energy Demand And Decarbonisation
More than half of sales tie to rising energy use, including nuclear, gas and power plants.
IMI plc: The Valves Keeping Energy Flowing
IMI makes the valves, pumps and precision components that control the flow of liquids, gases and air inside power stations, factories, hospital equipment and data centre cooling systems.
LSE:IMI
$3002.00-1.57%
Updated: Aug 11, 2026
Industrials
mediumuk
Bull & Bear Case
An overview of the main reasons to invest and the key risks involved.
Bull Case
Small Part But Critical For Clients
Its components cost customers little but are integral to their business, supporting pricing and repeat servicing work.
A Compounding Machine
Its unique operating playbook has lifted margins across business lines, while excess cash funds buybacks, dividends and small acquisitions.
Bear Case
Tied To Big Project Cycles
Power, gas and factory investment moves in waves; a pause slows new equipment orders.
Factory Spending Can Stall
Its shorter-cycle automation products swing with manufacturing confidence, which has been patchy.
Growth Needs Deals To Work
Part of the plan relies on buying small businesses, and integrations do not always pay off.
Executive Summary
About IMI
IMI makes the small, highly-engineered parts that control the flow of liquids, gases and air inside critical machinery. Its valves, pumps, actuators and pressure devices sit inside nuclear and gas power plants, oil and chemical refineries, factory production lines, train braking systems, building and data centre cooling, and medical devices.
Customers buy components for new plants and machines, then keep coming back for replacements, spares and servicing as parts wear out. Around 45% of sales come from that replacement and servicing work, which IMI describes as high-margin recurring revenue. The parts are usually a small share of a customer's total system cost but critical to how the system performs, which is the basis of the pricing power the company claims.
Customers buy components for new plants and machines, then keep coming back for replacements, spares and servicing as parts wear out. Around 45% of sales come from that replacement and servicing work, which IMI describes as high-margin recurring revenue. The parts are usually a small share of a customer's total system cost but critical to how the system performs, which is the basis of the pricing power the company claims.
Management frames the business around three long-run structural shifts: energy, automation and healthcare. IMI says over half of its revenue is directly supported by rising energy demand and the need for greater energy efficiency, positioning the group at the centre of one of the decade's most durable investment themes.
This is reinforced by a single internal playbook, the One IMI operating model, which is credited with steady margin gains across the group. Spare cash is then recycled into organic investment, small bolt-on acquisitions, dividends and buybacks, a disciplined capital allocation approach that leaves IMI well placed to keep compounding value for shareholders.
Investment Thesis
Overview of buy and sell case of the business.
Why Invest?
Key pieces of information about the business that you need to know about.
Growing Energy Demand And Decarbonisation
More than half of IMI's revenue is tied to rising energy demand and the drive for greater energy efficiency, with particular strength across nuclear, power generation and liquefied natural gas. These are long-life assets. A power station or LNG facility runs for decades, and the valves controlling flow inside them must be serviced and replaced throughout that life. A single project win can therefore keep generating spare-parts and maintenance income long after the original equipment has been installed and paid for.
Small Part But Critical For Clients
A valve or actuator is usually a minor line in the total cost of a customer's system, yet a failure can halt a refinery or a reactor. The combination of low relative cost and high consequence is what underpins IMI's pricing. Customers specifying these components are buying reliability, engineering support and fast service rather than shopping on price, which makes the business harder to displace once designed into a plant.
A Compounding Machine
A single shared way of working across the group, which IMI calls the One IMI operating model, is credited with steadily lifting adjusted operating margins over successive reporting periods. Profits convert reliably into cash, and the cash funds organic investment, small bolt-on acquisitions, a progressive dividend and share buybacks. The appeal is incremental rather than dramatic: a business designed to improve a little each year and return the surplus to shareholders.
Catalysts
The key events that could drive investment opportunities and shift markets.
Trading Update:
- Q3 Trading Update: The 29 October 2026 trading statement is the next scheduled read on whether IMI is still tracking mid-single-digit organic revenue growth. Investors will be watching for confirmation that the run continues, since an unbroken multi-year record is what underpins the compounding case.
Buyback Completion:
- Completing The Buyback Programme: An ongoing share buyback is steadily reducing the share count. Working through the remainder signals management confidence in cash generation and leaves earnings spread across fewer shares.
Data Centre Cooling Orders:
- Data Centre Demand In Climate Control: Orders for cooling and climate control tied to data centre construction have grown sharply from a small base. Sustained growth would turn a minor line into a recognisable contributor.
Bolt-On Acquisitions:
- Bolt-On Acquisitions: Surplus cash is earmarked for targeted small acquisitions alongside buybacks. Each deal adds products or geographies that can then be run through the group's existing operating model.
Nuclear And LNG Build-Out:
- Decades Of Aftermarket Income: New nuclear and LNG plants take years to build, then need spare parts and servicing for decades afterwards, extending repeat income far beyond the original order.
Automation And Chips:
- Automation And Electrification Demand: Rising factory automation, semiconductor manufacturing and electrification are long-run drivers for motion and flow control products, gradually widening the market IMI can sell into.
Key Risks
Key pieces of information about the business risks that you need to know about.
Tied To Big Project Cycles
Orders for new power stations, gas terminals and refineries are lumpy and decided years in advance. If energy companies push projects back, or governments slow nuclear approvals, the flow of first-fit equipment orders thins out. Servicing and spare parts cushion the gap, since installed valves still need maintaining, but aftermarket income cannot fully replace new-build work if a slowdown runs for several years.
Factory Spending Can Stall
IMI's industrial automation products go into factory machinery and follow much shorter cycles than energy infrastructure. Demand can swing with manufacturing confidence in Europe and China, and capital equipment orders are among the first things factory owners cut when conditions turn. Growth in this part of the group can therefore look strong or weak depending largely on where the industrial cycle happens to sit.
Growth Needs Deals To Work
Part of the stated growth plan rests on buying small companies and running them through the group's operating model. Acquisitions can disappoint, cost more to integrate than expected, or absorb management attention that would otherwise go into the core business. Overpaying, or buying into a weaker end market, would dilute the margin and cash-generation record the wider investment case depends on.
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Investor Materials
Access the most recent investor updates published by the company.
Key Documents
IMI Half Year Results 2026
PDFIMI Fact Sheet March 2026
PDFIMI Trading Update Q1 2026
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What the Pros are asking
Here are the questions that professional investors are asking before making an investment decision.
What does IMI actually sell, in plain terms?
Valves, pumps, actuators and pressure-control devices: the parts that start, stop and regulate the flow of liquids, gases and air inside bigger machines. They go into power plants, refineries, factory production lines, train braking systems, building and data centre cooling systems, and medical equipment. Customers buy them for new plants and machines, then buy replacements and servicing for years afterwards. Roughly 45% of sales come from that repeat replacement and servicing work.
How much of the business is genuinely recurring rather than one-off?
IMI says approximately 45% of sales come from the aftermarket, meaning spares, replacements and servicing on equipment already installed, which it describes as high-margin recurring revenue. In the first half of 2026 aftermarket orders in its process automation business rose 7% organically (IMI, 31 July 2026). Aftermarket work tends to hold up better than new equipment when customers delay capital projects, though it is not immune.
What is the One IMI operating model, and why do investors care?
It is IMI's name for one common way of running every business it owns: the same approach to pricing and commercial discipline, the same market-led product development, and continuous cost and process improvement. Investors care because it is the mechanism management credits for steadily rising margins, and because it is the reason the company believes it can buy small businesses and improve them. If margins stopped rising, the credibility of that model would be the first thing questioned.
How exposed is this to the data centre and AI build-out?
Indirectly, through cooling and power. IMI's Climate Control business took £18m of data centre orders in the first half of 2026, up from £6m a year earlier (IMI, 31 July 2026). The chief executive also linked demand to widespread electrification and data centre investment. It remains a small slice of a group with well over £2bn of annual revenue, so the interest is in the direction of travel rather than the size today.
What does IMI do with the cash it generates?
Four things, in its own stated order of priority: invest in organic growth, make targeted bolt-on acquisitions, pay dividends and buy back shares. In the first half of 2026 it returned over £300m to shareholders, completed £250m of a £500m buyback and raised the interim dividend by 10% (IMI, 31 July 2026). Net debt stood at 1.2 times earnings before interest, tax, depreciation and amortisation, a modest level for an industrial group.
Who does IMI compete against?
It sits in fluid and motion control alongside larger and similarly sized engineering groups: Emerson, Parker Hannifin and Flowserve in the United States, Festo in Germany, Alfa Laval in Sweden, and parts of Spirax Group and Rotork in the UK. Competition is generally on engineering specification, reliability and service network rather than on headline price, because the components are critical to how a customer's system performs.