ITM Power (LSE: ITM) stock jumps 10% as Great British Energy and DESNZ commit £86.5m to next-generation hydrogen manufacturing

ITM Power plc (LSE: ITM), the Sheffield-based green hydrogen electrolyser manufacturer, has secured a combined £86.5 million in UK government support to fund the commercial-scale build-out of its next-generation Chronos stack platform. Great British Energy Group Limited, the government’s publicly owned energy company, has agreed to subscribe for new ordinary shares at a cost of £40 million, while the Department for Energy Security and Net Zero has confirmed its intention to award ITM Power a grant of £46.5 million subject to subsidy control clearance. The funds are earmarked for a new 1 GW per year automated manufacturing line at ITM Power’s existing Sheffield facilities, targeting commercial operation in 2028. ITM Power shares closed up 10.71% at approximately 71.50p on the day of the announcement, against a 52-week range of 25.30p to 98.00p.

What is ITM Power’s Chronos electrolyser and how does it differ from the existing Trident platform?

The Chronos stack has been in development at ITM Power for over two years and is framed as an evolutionary rather than a clean-sheet design. The company says it carries over significant engineering from the already-deployed Trident stack while incorporating lessons from commercial project data and field performance. The expected improvements are material: substantially higher power density, lower per-unit cost, and better energy efficiency. The higher power density directly translates into a more compact physical footprint, which reduces installation costs at project sites and makes Chronos more competitive in cost-sensitive procurement processes. ITM Power also highlights low performance degradation over time and high grid-flexibility responsiveness as differentiating attributes, both increasingly important as customers seek to couple electrolysers tightly to intermittent renewable generation. Chronos is intended to become the foundation of ITM Power’s entire product range, feeding upgrades into its Neptune, Poseidon, and Alpha plant lines.

Trident is not being retired. ITM Power is explicit that it will continue manufacturing Trident to serve existing customers and long-term service agreements, and that Trident will itself benefit from future efficiency improvements and, where compatible, technology transfers from Chronos. That continuity matters for customer confidence and for near-term revenue. The company is currently delivering approximately 500 MW of active projects and has more than 550 MW of additional capacity reserved, a sales pipeline that represents real commercial substance rather than speculative backlog.

Why did ITM Power choose Sheffield for the Chronos manufacturing line rather than considering other locations?

The decision to anchor Chronos manufacturing in Sheffield was shaped by a convergence of strategic and operational logic. The company already operates its Trident production line there and has incrementally developed the manufacturing processes over five years. The Chronos line is intended to use many of those same processes, scaled upward and augmented with new bespoke automated production equipment. Capital investment will go into catalyst-coated membrane manufacturing equipment, electrode welding, specialist coatings, stack assembly lines, and cleanroom facilities. Co-locating Trident and Chronos manufacturing creates supply chain and quality system synergies that would be difficult and expensive to replicate on a greenfield site.

Sheffield’s established base of advanced manufacturing and engineering talent also figured in the decision. The DESNZ grant conditions include a commitment by ITM Power to grow its UK workforce by approximately 250 employees over five years, a figure calibrated to the anticipated increase in product demand rather than a concession extracted as part of the funding negotiation. For a company with around 300 employees, that represents a meaningful capacity expansion on the human capital side that will need to run in parallel with the manufacturing build-out.

How does the Great British Energy equity subscription structure affect ITM Power’s capital position and shareholder dynamics?

Great British Energy is subscribing for 71,994,240 new ordinary shares at 55.56 pence each, a 13.7% discount to the 8 April 2026 closing mid-market price. The new shares represent approximately 10.4% of ITM Power’s enlarged issued share capital of 689,365,229 ordinary shares. The subscription is being executed under existing shareholder authorities, so no general meeting is required, though the company acknowledges it is issuing up to 11.7% of its share capital on a non-pre-emptive basis under authorities approved at the October 2025 annual general meeting.

The governance mechanics of Great British Energy’s stake are worth understanding. For as long as Great British Energy holds at least 3% of ITM Power’s ordinary shares, it is entitled to send a non-voting board observer. Once its holding reaches or stays at 10% or more, it can nominate a non-executive director instead. Great British Energy has also agreed to a 12-month lock-up on its new shares and, separately, has capped itself from acquiring further shares beyond 29.99% of the company during that period, a ceiling that both protects other shareholders from dilution uncertainty and signals that Great British Energy is entering as a long-term strategic partner rather than as a potential acquirer. There is also a most-favoured-nation mechanism: if ITM Power raises additional equity within six months at a deeper discount than the 13.7% applied here, it must compensate Great British Energy retroactively. That provision provides a degree of price protection for the government’s initial commitment without being unduly restrictive.

What does the £46.5 million DESNZ grant mean for ITM Power and how should investors treat the timing risk?

The grant is structured as quarterly payments in arrears against capital expenditure incurred on the Chronos manufacturing line. It is not yet contracted. A subsidy referral was submitted on 7 April 2026 under the requirements of the Subsidy Control Act 2022, and the scrutiny process is expected to conclude around June 2026. Only after a satisfactory outcome will the grant be formally contracted. ITM Power has been transparent about this sequencing, which means investors are currently valuing an announcement with a meaningful conditionality embedded in just under half of the total government support.

The risk is real but the probability appears manageable. Subsidy control scrutiny under the 2022 Act is a procedural hurdle designed to ensure public money is being disbursed on defensible terms, not a substantive policy reversal mechanism. The government has already published its intention to award, the Energy Secretary has made supportive public statements, and the Department for Energy Security and Net Zero has presumably assessed the strategic case before reaching the confirmation-of-intent stage. A negative outcome from the June review would be a significant surprise rather than a base case, but it cannot be modeled away entirely until the grant is contracted.

How does UK government hydrogen policy provide a structural tailwind for ITM Power’s order pipeline?

The UK government’s Hydrogen Allocation Round programme represents the most relevant domestic policy tailwind for ITM Power. The HAR scheme provides long-term revenue certainty for projects deploying electrolysers at scale by underwriting the economics of green hydrogen production. ITM Power references early successes in HAR-funded projects and flags the upcoming HAR3 scheme as a near-term pipeline catalyst. With a growing order backlog of £152 million and 71% of contracts on profitable terms as of the most recent half-year reporting, ITM Power is no longer entirely dependent on converting pipeline into revenue. It is managing active delivery at scale while simultaneously developing the next generation of technology.

The UK’s decision to support ITM Power in this way also carries a competitive signaling dimension. Electrolyser manufacturing is an internationally contested industry. European and US governments have both deployed capital and industrial policy to build or retain electrolyser capacity domestically, with Siemens Energy, Nel Hydrogen, and Plug Power all receiving various forms of public support in their respective markets. The UK government’s dual intervention, combining equity through Great British Energy and a capital grant through the Department for Energy Security and Net Zero, is a deliberate statement that the UK intends to maintain a sovereign industrial capability in electrolyser technology rather than cede that ground to continental or transatlantic competitors.

What is the market and stock price context for ITM Power following the announcement?

ITM Power shares have spent much of the past year recovering from the 25.30p 52-week low, and the stock had stabilised in the low-to-mid 60p range in the weeks before this announcement. The 10.71% single-day gain to around 71.50p on 9 April brought the shares closer to the analyst consensus price target of approximately 77.50p to 98.64p depending on the source, though still substantially below the 52-week high of 98.00p. The Subscription Price of 55.56p, representing the 13.7% discount to the prior day’s close, is now materially below market, which confirms Great British Energy entered at terms that will generate an unrealised gain on day one of its holding.

The stock reaction is broadly consistent with the strategic significance of the announcement. The combination of government equity, grant funding, and an improved cash guidance range of £210 million to £215 million by year-end provides a balance sheet reassurance that was not previously priced in. ITM Power is still loss-making and pre-profitability, and the Chronos manufacturing line will consume capital through 2028, but the funding structure means that burn is now underwritten rather than speculative. Analysts covering ITM Power hold a consensus Buy rating, which is likely to be revisited upward given the quantum of support secured.

What are the key takeaways from ITM Power’s £86.5 million Great British Energy and DESNZ funding deal?

• ITM Power has secured £86.5 million in combined UK government support: £40 million via a Great British Energy equity subscription and a £46.5 million capital grant from DESNZ, subject to subsidy control clearance expected by June 2026.
• The funds are earmarked exclusively for a 1 GW per year automated Chronos manufacturing line in Sheffield, with commercial operation targeted in 2028.
• Chronos offers substantially higher power density, better energy efficiency, lower unit cost, and low performance degradation compared to the incumbent Trident stack, and will underpin ITM Power’s full product range.
• Great British Energy’s 10.4% equity stake comes with a 12-month lock-up, a 29.99% acquisition cap, and board observer or director nomination rights depending on holding level, structuring the government as a long-term industrial partner rather than a passive investor.
• Year-end cash guidance has been lifted to £210 million to £215 million from the prior range of £170 million to £175 million, providing significantly improved balance sheet visibility through the Chronos build phase.
• The grant remains uncontracted pending subsidy scrutiny, representing a procedural rather than a policy risk, but one that investors should track through the June 2026 conclusion.
• ITM Power’s Sheffield location, co-location of Trident and Chronos lines, and established manufacturing expertise were decisive factors in keeping Chronos manufacturing in the UK.
• The government support carries a workforce condition: ITM Power has committed to adding approximately 250 UK employees over five years, consistent with projected demand growth.
• The announcement reflects a direct competitive response to European and US governments backing their domestic electrolyser manufacturers, signalling UK industrial policy intent to maintain sovereign clean energy manufacturing capability.
• ITM Power shares gained 10.71% on the announcement day to approximately 71.50p, moving closer to analyst consensus targets while the stock remains 27% below its 52-week high of 98.00p.