NI 43-101 (Mining Disclosure)
NI 43-101 is the Canadian standard governing how mining companies disclose mineral resources and reserves to investors.
What it is
National Instrument 43-101 (NI 43-101) is a Canadian securities rule that sets out how companies must report scientific and technical information about mineral projects. It requires that key disclosures, such as estimates of mineral resources and reserves, be prepared or supervised by a 'Qualified Person' and supported by a Technical Report. It is designed to protect investors from unverified or overstated mining claims.
Why it matters
For mining investors, NI 43-101 is the credibility benchmark: resource and reserve figures backed by a compliant Technical Report carry far more weight than unqualified company estimates. It standardizes terms like 'measured,' 'indicated,' and 'inferred' resources so investors can compare projects. A pitfall is confusing a resource (mineralization that may exist) with a reserve (the economically mineable portion), which NI 43-101 carefully distinguishes.
How it's calculated
Not a calculated metric; it is a disclosure standard. Estimates are prepared by a Qualified Person following defined classification categories and filed as a Technical Report on SEDAR+.
How Quintarthai uses it
Mining names sourced from Canadian disclosures are fully covered on Quintarthai without a paywall, available across the screener and company pages. Open a company page to view a mining issuer.