Energy One Limited

The Business

Energy One sells specialist trading, scheduling and risk management software to energy market participants across Australia, New Zealand and Europe. Roughly 43% of FY26 revenue came from Australasia and the remainder from Europe, split across gas and electricity market platforms. The business runs on subscription contracts with annual price escalators, embedding itself in customers' daily trading operations rather than selling one-off licences. In November 2026 it expects to complete the acquisition of GMSL, a European scheduling and nominations business, roughly doubling its European footprint and adding a higher-margin product line.

Recent Performance

The shares have run hard over the past year as the market has re-rated the stock toward global SaaS multiples. FY26 revenue grew 14% to $69.9 million, building on a base that itself grew around 12% the prior year, and cash profit margin expanded to 21% from a 13% base four years ago, evidence of real operating leverage. The GMSL announcement in August 2026 added further momentum, with investors pricing in a transformative European expansion before a single quarter of combined results exists.

Outlook

Revenue is expected to roughly double over the next three years as GMSL layers substantial annual revenue on top of continued organic growth in the low double digits. EBITDA margin should extend gradually as the GMSL business, which runs at materially higher margins than Energy One's existing operations, blends in and integration costs fade. The key swing factor for the medium-term story is whether cash profit margin sustains progress toward management's stated target or stalls well short of it, a question the market has largely resolved in management's favour already.

Key Risks

The stock's own multiple is arguably its biggest risk: Energy One trades at a substantial premium to software peers on forward EBITDA, a level that typically requires sustained, close-to-flawless delivery to sustain, and any stumble on growth or margins could trigger a derating toward peer levels. GMSL integration is being led by a chief executive with under a year in the role, and there is a real possibility the deal delivers little to no cost or revenue synergy in its first years, given the demands integration places on management bandwidth across product, retention and cost consolidation at once. Separately, management's medium-term margin target sits meaningfully above our own peak-margin expectations, and with only four years of margin history through an unprecedented growth phase, neither the bullish nor the more conservative view can yet be confidently validated.

What to Watch

The thesis-defining event is the first combined half-year result in February 2027, which will show whether GMSL customer retention holds up and whether blended cash margin clears a meaningful threshold. The November 2026 shareholder vote removes near-term completion risk, and the August 2027 full-year result will be the definitive test of management's margin target.

• November 2026 GMSL completion (shareholder vote) — removes binary approval risk, a modest positive for confidence.
• February 2027 H1 FY27 results, first combined margin read — the key near-term test of integration quality.
• August 2027 FY27 full-year margin/synergy validation — confirms or breaks the medium-term margin thesis.

Latest Developments

Energy One announced the all-scrip acquisition of GMSL in August 2026, its largest deal to date, issuing approximately 7.09 million new shares to Fluxys and adding a board seat. The deal is expected to complete following a shareholder vote in November 2026.

Company Description

Energy One provides software for energy market participants to trade, schedule, settle and manage risk across wholesale gas and electricity markets. The Australasian division, contributing 43% of FY26 revenue ($30.1 million), serves trading and risk platforms for retailers and generators across the National Electricity Market and New Zealand. The European division, contributing 57% ($39.5 million), covers gas and power trading software across multiple interconnected markets. Following the GMSL acquisition, expected to complete in November 2026, a third pillar emerges: European gas and power scheduling and nominations, servicing 18 gas networks and 15 power grids, adding roughly $25-27 million of incremental annual revenue at higher margins than the existing European business.

Where the Growth Is

GMSL is the single biggest driver of the next three years. It contributes nothing in FY26, a partial-year contribution in FY27 following completion, and ramps toward a full run rate approaching 27% of total group revenue by FY28. The business runs at roughly 42% EBITDA margin, well above Energy One's 29.6% standalone level, meaning the acquisition is margin-accretive even before any cost synergies are realised. Management has targeted several million dollars a year in cost synergies; our base case assumes only partial realisation of that target rather than full capture.

Competitive Position

The core competitive advantage is switching cost. Energy trading software is embedded in daily operational workflows, from trade capture through to settlement, and migrating to a competitor typically requires a 12-18 month project with real operational risk. That shows up in the numbers: 90% gross customer retention and 106% net revenue retention, meaning existing customers are spending more, not less, over time. Energy One is the only listed pure-play energy trading software business globally, giving it a scarcity value that larger, more diversified competitors such as ION Group's Brady and Openlink platforms do not carry. That said, the moat is narrow rather than deep: ION's greater scale could eventually support mid-market price competition, and two customers exited or internalised trading functions in FY26, a reminder that large accounts can build in-house alternatives when the economics justify it. We see the advantage holding for roughly five to seven years before the assumption needs revisiting.

Management & Capital Discipline

Management has repaid debt to reach a net cash position, resumed dividend payments, and structured the GMSL acquisition entirely in scrip to preserve balance sheet capacity, sensible choices given the integration risk ahead. Chief executive Ben Tranier has delivered a strong first year, with cash profit margin expanding 400 basis points and net cash achieved, but he has under a year in the role and leads an entirely refreshed leadership team now executing the company's largest-ever deal. His medium-term margin target and claim of substantial earnings accretion from GMSL both assume close to flawless execution from a team with no track record of delivering acquisitions this size. That combination, strong early results paired with unproven scale execution, is the honest tension in the management story.

Financial Position

Energy One holds a net cash position of roughly $0.7 million after debt repayment, with a further $17 million of undrawn facility headroom and no financial covenants to manage. Free cash flow was $11.4 million in FY26 and is expected to grow steadily as capital expenditure intensity declines from 10.7% of revenue toward the high single digits. The GMSL deal was funded entirely in shares, so leverage does not increase at completion. The balance sheet comfortably supports a downturn or a slower-than-planned integration, though it offers little in the way of a valuation floor given how intangible-heavy the asset base is.