Plug Power’s Short Sellers Face a Triple Threat: Better Margins, Barrow Green Light, and AI Momentum

A 14% after-hours pop on quarterly results, a major green hydrogen project reaching financial close in the UK, and a sector-wide lift from the AI infrastructure boom — Plug Power has strung together three catalysts in rapid succession. Yet the real test for the stock lies not in the news flow, but in whether the company can convert pipeline into cash and margins into a sustainable profit.

Margins Narrow Sharply Even as Net Loss Widens

Plug Power’s first-quarter 2026 numbers painted a picture of steady operational progress weighed down by non-cash accounting charges. Revenue climbed 22% year on year to $163.5 million, while gross margin ballooned from negative 55% to negative 13% — a swing that signals the cost structure is moving in the right direction. The operating loss narrowed to $109.5 million from $178.5 million a year earlier.

The headline net loss, however, swelled to $245.3 million from $196.7 million. The culprit: $70.8 million in mark-to-market adjustments on convertible debt and $54.6 million in warrant liabilities, neither of which affects cash. On an adjusted basis, Plug Power lost $0.08 per share, beating the consensus estimate of a $0.0963 loss. That beat, combined with the margin improvement, sent shares climbing 14% in extended trading.

Barrow Becomes a European Landmark

Across the Atlantic, the company notched its most significant European reference to date. The Barrow Green Hydrogen Project in Cumbria, a joint venture between Schroders Greencoat and Carlton Power called GHECO, has taken its final investment decision. Plug Power will supply six 5 MW GenEco PEM electrolysers for the 30 MW facility, which is expected to produce around 100 GWh of green hydrogen annually from summer 2026, with commercial operations slated for 2028.

The offtaker is Kimberly-Clark, the consumer goods giant behind Andrex and Kleenex, which plans to use the fuel to cut its natural gas consumption by up to 50% and eliminate roughly 18,300 tonnes of CO₂ each year. Dalkia UK will handle construction, and a long-term power purchase agreement with SEFE secures the renewable electricity needed for electrolysis. For Plug Power, the project is a ready-made case study for European clients weighing green hydrogen as a decarbonisation tool.

AI Infrastructure Adds a Sector Tailwind

The same week brought a broader boost for hydrogen and fuel-cell technologies. Bloom Energy announced a 328 MW fuel cell deal with Nebius, an AI infrastructure provider, underscoring the growing demand for backup and baseload power in data centres. The market read the news as a positive signal for the entire clean-energy equipment space, Plug Power included. Shares have since traded at around €3.32, more than 60% above their 200-day moving average and up roughly fourfold from the May 2025 low of €0.69.

Should investors sell immediately? Or is it worth buying Plug Power?

Cash Burn Persists as Asset Sales Take Centre Stage

The company ended March with $802 million in liquidity, but operating cash outflows consumed $150 million in the first quarter alone. Management’s plan to reach positive EBITDAS by the fourth quarter hinges on a series of asset monetisations and working capital releases. A tax credit sale tied to the Louisiana joint venture is expected to yield roughly $39 million by May, while a larger transaction — worth around $142 million — is scheduled to close in June.

That June deal, in particular, is a linchpin. If it goes through as planned, Plug Power will have bought itself several more quarters of runway to ramp electrolyser production and improve margins further. If it stalls, the cash cushion will shrink faster than the market would like.

Analysts Remain Divided, Short Sitters Lurk

The analyst community reflects the uncertainty. Susquehanna nudged its target price up by $0.25, while Wells Fargo held at $2. Jefferies trimmed to $1.80 and BMO Capital went as low as $1 — a spread that highlights the wide range of views on execution risk.

Short sellers have not blinked. Roughly 24% of the free float is sold short, a level that creates asymmetric risk. If the asset sale closes on schedule and the gross margin continues to improve in the second quarter, covering shorts could accelerate any upside. Conversely, any liquidity scare would give the bears more ammunition.

The stock currently sits about 7% below its 52-week high of €3.51, with the next major catalyst — the June asset sale — likely to determine whether Plug Power can retest that level or loses altitude.