From patents to portfolios: why we read the patent record.

The energy transition is a secular shift, not a market cycle. Electrifying transport, heating and industry, rebuilding grids to carry intermittent renewable power, capturing what carbon cannot yet be avoided — this is decades of capital expenditure that will happen under almost any political weather, because the economics of renewable generation and electrification keep improving regardless of who holds office. For an investor, the question is not whether the transition happens. It is which companies will own the technology when it does.

The problem with the usual lenses

The standard tools answer that question badly. Revenue-based screens — “give me companies with more than half their sales in clean energy” — are rear-view mirrors: they tell you who won the last decade, not who is positioned for the next one. A company earning nothing yet from a breakthrough electrolyser design is invisible to them. So is the industrial conglomerate quietly redirecting its research budget from combustion engines to heat pumps: its revenue mix will not reflect that decision for years.

The other tool is the corporate narrative — sustainability reports, net-zero pledges, transition frameworks. These are marketing documents. They are cheap to produce, unverified, and written by the same department that writes the advertising. A pledge costs a press release; nobody audits the ambition.

What a patent actually is

A patent is a different kind of document. Filing and maintaining one costs real money, in every jurisdiction where protection is sought. The application is examined by an independent patent office, which classifies the invention and tests it against everything previously published. And the filing is public: the company must describe, in enforceable detail, what it has built and why it is new.

That combination — costly, examined, specific — is what makes patents useful as an investment signal. A company can say anything in a sustainability report; a patent is a paid, examined, legally defended claim about a specific technology. You cannot greenwash a patent office. And because patents are published well before products reach the market, the record is forward-looking: it shows where research money is going before it shows up in revenue.

Patents are our measure of innovative capacity — and the link between innovation and growth is well established, for a company as for a country.

From the patent record to a portfolio

Reading that record systematically is the whole method. It runs in one direction, from technology to company to portfolio:

• Define the technologies. Each decarbonisation theme is broken into precisely defined technologies — from point-source carbon capture to grid-scale storage to sustainable aviation — each specified through the international patent classification systems and refined with technology-specific search language. How, exactly, is the subject of a separate note.
• Retrieve the patents. For every technology, we query the global patent record through Patsnap, a specialised patent intelligence platform, keeping only active or pending patents held by companies — not lapsed filings, not university or individual applicants.
• Resolve the owners. Patent assignees are matched to their ultimate listed parent and to the most liquid exchange listing, so that innovation done in a subsidiary is credited to the security an investor can actually buy.
• Score and select. Companies are scored within each technology on how specialised, how significant and how valuable their patenting is, and the leaders form the selection universe. The scoring logic has its own note.

The process is deliberately mechanical. The judgment sits where it belongs — in defining the technologies and designing the scores — not in discretionary stock stories. The record is refreshed quarterly on a rolling multi-year window, so the portfolio follows the technology frontier rather than a static list drawn up once.

What patents cannot tell you

No honest methodology claims its signal is complete, and the patent record has known blind spots. Patenting propensity differs across industries and countries: some sectors protect innovation through secrecy rather than filings. Raw patent counts are a poor guide on their own — one breakthrough outweighs a hundred defensive filings — which is exactly why the scoring weighs patent value and quality, not volume. And a patent proves invention, not commercial success; execution still decides who profits from the technology.

These limits are manageable because the comparison is always like-for-like: companies are measured against other companies in the same technology, where filing behaviour is broadly similar. What the patent record offers, uniquely, is an objective, verified, forward-looking map of who is building the energy transition — drawn from documents companies paid to file, not stories they paid to tell.

Patent data: Patsnap.