ITM Power’s Rally Pauses After 23% Weekly Surge as Giga PtX Partnership Reshapes Outlook

ITM Power surged 23% to a 52-week high before profit-taking. Momentum and Giga PtX partnership with Rheinmetall drove the rally; stock ends week sharply higher.

A furious four-day run that drove ITM Power shares to a 52-week high ended abruptly on Friday, as profit-taking erased the week’s gains but still left the stock nursing a substantial weekly advance. The hydrogen electrolyser specialist closed the last week of May at 194.40 pence, shedding roughly 7% on the day, yet the overall picture remained emphatically green: from the 170.20-pence close on 22 May, the shares peaked at 209.20 pence on 28 May — a 23% jump in three sessions. Friday’s reversal saw a spike in turnover, with 27.1 million shares changing hands, more than double the volume of the two preceding days.

Notably, the blast-off came without a catalyst from the company itself. No new contracts, no funding announcements, no corporate releases — the most recent official statement dated back to 18 May. Instead, traders chalked the move up to pure market momentum, with positioning in the hydrogen and electrolyser space reasserting itself after weeks of consolidation.

The underlying driver of the broader trend, however, is far from news-free. ITM Power’s longer-term rally began in earnest in early April, when the stock was trading at just 69.00 pence. A strategic tie-up with defence and engineering group Rheinmetall, coupled with a UK government grant commitment, sent the shares to 131.50 pence by mid-April. That partnership — dubbed Giga PtX — is now taking shape. The plan calls for hundreds of decentralised production units across Europe, each with an electrolyser capacity of up to 50 megawatts and an annual e-fuel output of 5,000 to 7,000 tonnes. The UK serves as the pilot market. ITM Power supplies the electrolysers; Rheinmetall contributes its power-to-X expertise. ITM CEO Dennis Schulz framed the union as essential for European energy security, arguing that “reliable access to fuel is a basic prerequisite for defence capability” and that decentralised production makes supply chains more resilient than traditional centralised models.

Despite the strategic weight of Giga PtX, market sentiment has not yet caught fire. The news sentiment score for ITM Power stands at just 0.30, well below the energy-sector average of 0.72. Yet a quiet shift is under way among short sellers. Aggregate short positions have fallen to 1.63%, with Helikon Investments nearly halving its position from 1.46% in mid-May to 0.83% by 27 May. The retreat suggests that even some of the most bearish funds are beginning to reassess the company’s trajectory.

On the technical front, Friday’s intraday high of 217.60 pence marked a new 52-week peak before the reversal. The relative strength index sits at 68.82 — just below the overbought threshold of 70, but far above the 50-day moving average of 113.89 pence and the 200-day moving average of 80.53 pence. The key support level to watch is 192.07 pence, Friday’s low. If buyers can defend that line, a retest of the 217.60-pence peak remains possible. A break below, however, would likely draw attention to the 180-pence zone, where June’s consolidation carved out a floor.

For now, the stock’s fate hinges on whether the fundamental narrative — and specifically early milestones from the UK pilot project — can validate the technical extension. The Giga PtX project has the potential to transform ITM Power from a promising technology story into a scaled industrial player. Until tangible progress emerges, however, the market may continue to swing between the promise of the partnership and the gravity of an extended valuation.