NI 43-101: How Technical Reports Make Uranium Juniors Investable

When numbers become official: the moment a report is filed

In uranium junior mining, one transition looks unspectacular from the outside yet reshapes how a project is priced and financed: the filing of an independent technical report under the Canadian standard NI 43-101. Internal estimates, historical datasets, or slides from an investor deck become a regulated, publicly accessible document, reviewed by a licensed expert who carries personal legal liability for its contents.

Several uranium exploration companies have filed such reports in recent months, including companies with projects in the Athabasca Basin in Saskatchewan and in Queensland, Australia. That both regions appear on the same list says something about NI 43-101’s reach: it is not a Canadian domestic requirement. Publicly listed junior miners use it as a quality benchmark regardless of where their projects sit.

What NI 43-101 actually regulates, and why it matters

NI 43-101 stands for “National Instrument 43-101 – Standards of Disclosure for Mineral Projects,” introduced by Canadian securities regulators. The standard governs how mineral companies may communicate publicly about their projects. Every public statement about mineral resources or reserves must be authorized by a licensed professional called a “Qualified Person” (QP).

One distinction investors should keep straight: resources and reserves are technically separate categories and must not be treated as interchangeable.

• Mineral resources are divided by increasing geological confidence into Inferred, Indicated, and Measured. They describe what may be present in the ground.
• Mineral reserves, subdivided into Probable and Proven, go further: they already factor in mining plans, economic parameters, and technical feasibility. A resource only becomes a reserve once it has passed an assessment of modifying factors.

From estimate to standard: how a report is built

The exploration company collects data first: drill cores, geochemical samples, and geophysical measurements feed into geological models. An external Qualified Person, typically an experienced geologist or mining engineer with no commercial stake in the outcome, then reviews that data, evaluates its quality, and produces the technical report.

The QP bears personal liability for the accuracy of what is written. That is the practical difference between an NI 43-101 report and an internal company presentation, where management decides what to communicate. An external reviewer has no career incentive to flatter a project.

Think of it the way you would think about commissioning an independent inspection before buying a used car rather than taking the seller’s word for it. The step from a historical dataset to an NI 43-101-compliant resource is not a promise of production, but it is documented, regulated, and publicly filed on SEDAR+.

What a filing means for small-cap investors

A filed NI 43-101 report changes how a project is financed, even when the underlying numbers are not new. What shifts is the regulatory status of those numbers.

Investment banks and institutional investors generally require these reports before they will look seriously at a junior miner. Without regulated resource documentation, conventional capital market financing is simply not available. The filing also confirms that enough data exists to justify an external qualified assessment, which separates projects still in early prospecting from those with a track record of drilling results that can be independently checked.

Updated reports following additional drilling programs show how resource categories move over time. When a share of tonnage shifts from Inferred to Indicated, that reflects an improved geological database — a technically measurable step regardless of what the company says about it in its press releases.

Technical reports in the context of the 2025/26 uranium market

The uranium sector is drawing more institutional interest as nuclear energy regains ground in policy discussions around CO₂ reduction, and new reactor projects in Asia and Europe are adding to demand. That interest brings pressure for better documentation.

Jurisdiction matters here. The Athabasca Basin in Saskatchewan produces some of the highest-grade uranium ore in the world; Queensland in Australia offers a well-regulated environment, though a politically sensitive one. NI 43-101 reports for projects in both regions allow investors to compare assets using the same classification criteria rather than trying to reconcile incompatible national standards.

That said, the existence of a report is a floor, not an achievement. Which tonnages sit in which resource category, which cut-off grades were applied, and whether a Preliminary Economic Assessment (PEA) forms the underlying basis — that is the substance. All of it is in the published reports themselves.

Read the resource documentation, not just the headline

Investors who follow uranium junior miners should learn to read these reports, at least at a basic level. Not to work through every geological parameter, but to answer specific questions: In which resource category do the tonnages sit? Does the QP have relevant experience with the type of deposit being assessed? Is this an initial filing or an updated version following a new drilling program?

The answers are in the reports, which are publicly accessible on SEDAR+. In an industry where most information reaches investors through press releases and investor presentations, going to the source is often the only way to check what a headline number actually means.

Key terms at a glance

NI 43-101

Canadian regulatory standard governing public disclosure about mineral projects. Requires companies to have all resource and reserve statements authorized by an independent Qualified Person.

Qualified Person (QP)

An independent professional (geologist or engineer) with at least five years of relevant experience who signs the technical report and bears personal liability for its contents.

Inferred Resource

The lowest NI 43-101 resource category. The geological database is limited and estimates carry higher uncertainty. May not serve as the basis for feasibility studies.

Indicated / Measured Resource

Higher resource categories supported by a denser data network. Indicated resources may feed into feasibility studies; Measured resources form the basis for reserve calculations.

Mineral Reserve (Proven / Probable)

Resource categories that already incorporate economic and technical parameters. A reserve is the portion of a resource that can be profitably mined under assumed conditions.

Preliminary Economic Assessment (PEA)

A preliminary economic evaluation of a project. Less detailed than a pre-feasibility or feasibility study, but a meaningful step in assessing a project’s economic potential.

Cut-off Grade

The minimum grade (e.g., in ppm U₃O₈ for uranium) above which a sample is included as economically relevant in a resource estimate. Directly influences the reported tonnage.

SEDAR+

The Canadian platform for the electronic filing and public access of capital market documents, including all NI 43-101 reports filed by publicly listed companies.

⚠️ Important notice: This article is for informational and educational purposes only. It does not constitute investment advice, a recommendation, or a solicitation to buy or sell any security. Investments in small-cap exploration and mining companies carry a high risk, including the potential total loss of capital. Before making any investment decision, consult a registered financial advisor and conduct your own analysis. Boersen Post Team is not responsible for decisions taken based on the content published here.