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The UK arm of the EDF-backed contractor lifted turnover 8% to £657m in 2025, while pre-tax profit surged to £8.2m from just £0.3m the year before.
Underlying performance also strengthened, with EBITDA before exceptional items more than doubling to £18m.
The turnaround comes as Dalkia leans heavily into nuclear, healthcare and decarbonisation work, helping push its order book up 17% to £1.3bn.
Group chief executive Gautier Jacob said the business had surpassed its previous £600m revenue target and is now targeting further growth beyond £750m through acquisitions and more international work
Growth was led by a major push into nuclear infrastructure, including expansion across the existing power generation fleet and new build projects, alongside a major facilities management contract on EDF nuclear sites that brought in more than 1,000 staff.
Total headcount now stands around 5,250 made up of 4,200 directly employed operatives and just over 1,000 in management and administration.
Facilities management was a standout performer, with revenue jumping strongly on the back of the nuclear FM contract, while systems integration arm Capula also grew and improved margins.
| Business | 2025 (£m) | Change (%) |
|---|---|---|
| Engineering Services | 272 | -5% |
| Technical facilities management | 294 | +24% |
| Systems integration | 56 | +3% |
| Energy Services | 34 | +6.% |
| Total | 657 | +8% |
But the Energy services arm, specialising in largescale decarbonisation jobs for health and universities, saw profits fall after delays getting projects to site and cost overruns on a major job hit margins — a reminder of ongoing delivery risks in complex retrofit schemes.
Despite this, Dalkia’s balance sheet strengthened significantly, with cash more than doubling to £44m from £20m.
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