Stock List Methodology

The database

Every stock list on this site is generated from a single research database tracking 460+ publicly traded companies — their exchange listings, market capitalizations and their roles in the energy transition.

What it takes to be on a list

• Publicly traded. Every company has a live listing on a recognized exchange (or, where noted, OTC). Private companies appear only in news coverage, never on lists.
• Meaningful exposure to the theme. Each company is classified by where it sits in the value chain — miner, processor, equipment maker, developer, operator — and a company joins a list only when the theme is a material part of its business, not a press-release sideline. Composite lists (e.g. battery metals) aggregate their member lists.
• Judgment, disclosed. Inclusion is ultimately an editorial call. When it’s borderline, the company’s expandable panel explains what the exposure actually is, so you can judge for yourself.
• Complete by design. Lists include every qualifying listed company, from mega-caps to micro-caps. Size is data, not a filter — every list shows market capitalization, so you can apply whatever floor fits your own risk tolerance.

Companies are removed when they delist, are acquired, or exit the theme — and removals are recorded in the changelog rather than silently disappearing.

Where the numbers come from

• Market capitalizations are sourced from public market data and refreshed on a weekly cycle. Non-USD listings are converted to US dollars, and the exchange rates used are shown on the list page wherever a list includes non-USD listings.
• ETF data (assets under management, expense ratios, holdings) comes from fund sponsors’ published materials and public market data, with per-fund “as of” dates shown on each ETF page.
• Company details (projects, value-chain position, key assets) come from company filings, investor presentations and announcements.

Quality controls

• Anomaly flags: month-over-month market-cap moves of 30%+ are flagged for review; moves of 50%+ block automatic publishing until a human verifies the figure is real (a stock split, an acquisition, an actual re-rating) rather than a data error.
• Audit trail: list changes — companies added or removed, data corrected, descriptions updated — are recorded with a date and reason, and recent changes are published on the stock lists hub.
• Freshness stamps: every list page shows when its data was last updated. If a date looks stale, it is — we don’t fake freshness.

Limitations

Honesty about what this system can’t do:

• Market caps are point-in-time approximations. They’re refreshed weekly, not live, and currency conversion adds its own small imprecision. Treat them as scale indicators, not trading data.
• Company exposure changes faster than filings. A company’s role in a theme can shift between our updates — divestments, pivots and acquisitions can make a classification stale before we catch it.
• Theme classification involves judgment. Reasonable people can disagree about whether a diversified miner is a “copper stock.” We explain our reasoning in the expandable panels, but it remains editorial judgment, not an objective fact.
• Inclusion is not endorsement. Lists describe exposure to a theme. They say nothing about whether a company is a good investment — many companies on these lists are early-stage and may never reach production or profitability.

Corrections

Nothing on this site is investment advice. Information is provided in good faith from sources believed reliable, but accuracy is not guaranteed — always verify against primary sources and consider professional advice before making investment decisions.