Sulnox Group: Lower Fuel Costs, Lower Emissions, Zero Capex

Dear Reader,

We recently caught up with Ben Richardson, CEO of Sulnox Group, for an introduction to the fuel efficiency business.

It was a great opportunity to learn more about the company following a strong period of revenue momentum and deal flow.

And for investors coming to Sulnox for the first time, the proposition here is clear, simple and potentially very scalable.

That’s what we like to see.

Simply put, Sulnox is a greentech company helping customers make their existing fuels go further.

Its core product, Sulnox Eco, is a drop-in fuel conditioner designed to reduce fuel consumption, lower emissions and improve engine performance—without customers needing to modify vessels, engines or infrastructure.

And that last bit is key:

• Many decarbonisation technologies ask customers to spend heavily upfront, change operations or wait years for payback. Sulnox is offering something much simpler: pour it in, burn fuel more efficiently, cut emissions and save money.

For sectors such as shipping, rail, logistics, mining, construction and power generation, that is an attractive customer proposition.
So, let’s look at how this could translate into shareholder value…

From validation to scale-up

The marine sector is currently leading the charge for Sulnox.

That makes sense. Shipping companies are under constant pressure to cut fuel bills, meet tightening environmental rules and improve carbon intensity across their fleets. Sulnox is now starting to turn that pressure into commercial momentum.

In June, the company announced a four-year supply agreement with Eastern Pacific Shipping, the largest commercial agreement in Sulnox’s history.

The deal expands deployment of Sulnox Eco from around 30 EPS vessels to more than 50, covering approximately 1.2 million litres of product over the contract term.

It followed more than two years of operational use and validation, during which EPS reported fuel savings of between 3% and 5%, alongside cleaner engine conditions, lower sludge generation and improved fuel performance.

That’s a strong proof point.

Sulnox has also recently highlighted recognition for its work with Spring Marine, a Greek ship management company that has been using Sulnox Eco across its vessels.

Spring Marine recently received an ESG Shipping Award following fleet-wide deployment of the product, with the programme recording average fuel consumption reductions of around 5% and an estimated annual reduction of approximately 23,000 tonnes of CO₂ emissions.
But for investors, the appeal is not just the environmental impact.

• It’s that customers appear to be seeing measurable operational and financial benefits without major disruption. If those benefits continue to translate into repeat orders, wider fleet rollouts and long-term supply agreements, Sulnox has the foundations for a recurring growth model.

This is already beginning to show through in the numbers…

Growing Revenues with Room to Scale

Sulnox is still early in its commercial journey, but the growth momentum is now very visible.
 

In April, the company reported record full-year revenue of £2.62 million for the year to 31 March 2026, up 134% on the prior year. Q4 revenue was also a record at £929,000, up 97% year-on-year.
 

Repeat sales, wider fleet rollouts and engagement with around 100 shipping companies all point to a business starting to find its market.

The next step is scale.

At a current market cap of around £83 million, Sulnox is no longer flying under the radar. But if adoption continues to build, there could still be meaningful upside from here.

The company is targeting a very large market. Marine is the most advanced part of the business today, but Sulnox also sees significant potential across land-based sectors including rail, logistics, mining, construction, fuel retail and power generation.

That gives the company several ways to grow.

What to watch next
 
For investors, the watchlist is simple.

1. We need to see Sulnox keep converting trials into repeat orders and fleet-wide rollouts;

2. We need to see it deepen its position in marine; and

3. We need to see whether it can start to replicate that traction in land-based markets.

If this is all achieved, the company could move from a specialist fuel-efficiency business into a much broader clean technology platform.

There are still risks. Sulnox needs to keep proving adoption, scaling distribution and managing growth carefully.

But the direction of travel is very encouraging.

Lower fuel costs. Lower emissions. Zero capex—the company has a simple message. But in industries where fuel cost and regulation are only getting more important, it could be a powerful one.

• To learn more about the company, its technology and where growth could come from next, watch our full interview with Sulnox CEO Ben Richardson.

Best wishes,
The StockBox Team