Even though FuelCell Energy has been in business since 1969, it still has the vibe of a startup waiting for its breakthrough. There’s nothing particularly dramatic about the scene when you drive past its Danbury, Connecticut headquarters on a weekday afternoon. It’s a low-slung building with a half-full parking lot, the kind of quiet industrial setting that gives no indication of the strange tug-of-war surrounding its stock. Nevertheless, FCEL has turned into one of those tickers that traders are constantly looking at with mixed feelings of optimism and skepticism.
FuelCell Energy seems to have been on the verge of something significant for a long time. Decades, perhaps. In addition to producing molten carbonate fuel cell power plants and selling heat and electricity, the company also captures carbon and has recently been venturing into long-duration storage and solid oxide electrolysis. On paper, it appears in practically every discussion regarding the energy transition. In actuality, the share price conveys a more nuanced picture that investors have long debated.
The technology, which most analysts are already familiar with, isn’t really what makes FCEL intriguing at the moment. The actions surrounding the stock are the cause. 73 institutional investors increased their holdings in the most recent quarter, while 68 decreased them—a nearly evenly divided group. In Q4 2025, Vanguard added over 1.4 million more shares. Invesco came next. Subsequently, positions were opened or expanded by Qube Research, Acadian, Susquehanna, UBS, and Bank of Montreal until early 2026. If these funds had given up on the company, you wouldn’t see this type of purchase. Instead, it appears to be a gradual accumulation by those who anticipate something.
Conversely, the insiders have been acting in the opposite way. In six months, there were two sales but no purchases. Small sales, such as Betsy Bingham selling about 8,600 shares and an executive selling 2,500, are undoubtedly significant. One of those times when the market feels less like a machine and more like a room full of people arguing is when insiders sell while hedge funds buy. It’s difficult to ignore the tension.
A portion of the optimism surrounding FCEL can be attributed to the company’s previous carbon capture partnership with ExxonMobil, which was renewed in 2019, as well as the larger political push for decarbonization. The company’s carbonate cells are capable of extracting CO2 from heavy industry exhaust while producing electricity. Pitches like that sound almost too tidy and practical. However, if any of these climate targets are to have any significance, the world will likely need this kind of approach. In the UK, Drax has investigated it. Checks have been written by the Department of Energy. Small but significant work is being done in San Bernardino to convert anaerobic digester gas into electricity.
The financial picture is still messy. FuelCell Energy has been chasing scale for years, lost its significant POSCO partnership in 2020, endured investor annoyance, seen its stock fluctuate wildly, and is still operating in an industry where patience is the only reliable currency. Investors appear to think that the company’s next phase could be more disciplined, particularly under Jason Few, who has been in charge since 2019. That might be the case. It’s also possible that the same optimistic storyline is repeated every few years.
As you watch this happen, you get the impression that FCEL is one of those stocks that is more defined by the sluggish, uneven development of an entire industry than by its quarterly results. The Bridgeport plant continues to hum. The Korean park continues to generate electricity. The debate over carbon capture is becoming more and more heated. The question of whether that results in a significant turnaround or yet another protracted period of waiting remains unanswered.
