- Securities law requires a news release immediately when a material change occurs, and a material change report within 10 days.
- The TSXV and CSE go further and require prompt disclosure of all material information, which includes material facts as well as material changes.
- A trading halt is a short pause so news can reach everyone at once. On its own it says nothing about whether the news is good or bad.
Introduction
A junior mining company's share price moves on news: drill results, financings, property deals, management changes. Canadian rules exist so that everyone gets that news at the same time, as soon as it is real. The rules come from two places. Securities law, mainly National Instrument 51-102 and the guidance in National Policy 51-201, sets the legal floor. The exchanges, the TSX Venture Exchange (TSXV) and the Canadian Securities Exchange (CSE), add their own requirements on top.
This guide explains the key terms and timelines in plain language. It is general information, not legal advice.
Securities law covers material changes. The exchanges cover all material information.
Material Change and Material Fact
National Policy 51-201 sets out the two definitions used in securities legislation:
- A material change is a change in the business, operations or capital of the company that would reasonably be expected to have a significant effect on the market price or value of its securities. It can include a decision to make such a change, even before the board approves it, where board approval is probable.
- A material fact is a fact that significantly affects, or would reasonably be expected to significantly affect, the market price or value of the securities.
The difference matters. A material fact need not be a change. Under securities law, the timely disclosure obligation applies to material changes. The prohibitions on tipping and insider trading apply to both. Quebec uses its own concept, privileged information, with a reasonable investor test.
National Policy 51-201 gives examples of potentially material information. Several apply directly to explorers:
- significant discoveries by resource companies, which can include drill or assay results;
- changes in the value or composition of the company's assets;
- significant acquisitions or dispositions of property, such as buying a claim block or optioning out a project.
The list is a guide, not a checklist. Whether something is material depends on the company. A modest property deal can be material to a junior with one project and routine for a larger company.
The Legal Timeline
When a material change happens, according to National Policy 51-201 a company must:
- Immediately issue and file a news release disclosing it.
- File a material change report as soon as practicable, and no later than 10 days after the change.
There is a narrow exception. If immediate disclosure would be unduly detrimental to the company, for example during sensitive negotiations, it can file a confidential material change report with the securities regulator instead of a public release. In some jurisdictions that confidential filing must be renewed every 10 days. Regulators discourage long delays, because the longer a secret is kept, the more likely it leaks.
What the Exchanges Add
Both Canadian venture exchanges require more than securities law does.
- TSXV. Policy 3.3 requires an issuer to disclose material information concerning its business and affairs immediately. Material information covers both material facts and material changes. The policy states that "the overriding rule is that significant announcements are required to be released immediately."
- CSE. Policy 5 requires listed issuers to disclose material information as soon as it becomes known to management, subject to notifying the market regulator first. It treats materiality as a judgment for the issuer and encourages issuers to consult the regulator confidentially when unsure.
Both exchanges also deal with timing during market hours. Under TSXV Policy 3.3, if a release will go out during trading hours, management must notify the Regulation Services Provider before issuing it. CSE Policy 5 requires notice to the market regulator, reached through the Canadian Investment Regulatory Organization (CIRO), before a significant announcement during trading hours, so it can decide whether to halt trading.
How the news goes out matters too. CSE Policy 5 requires dissemination through a wire service with national, simultaneous coverage. TSXV Policy 3.3 states that filing material information on SEDAR+ alone is not enough, and that issuers should not post it on SEDAR+ before the release has crossed the wire.
Trading Halts
A trading halt stops trading in a company's shares for a short time so material news can reach the whole market before anyone trades on it. Under CSE Policy 5, halts are normally imposed by the market regulator, and a company can request one. Halts can also follow rumours or unusual trading that suggest undisclosed news is leaking.
Some points from the exchange policies:
- TSXV Policy 3.3 states that trading is normally interrupted for less than two hours.
- Under CSE Policy 5, when an issuer requests a halt, it must put out a news release within 24 hours.
- TSXV Policy 3.3 says it is not appropriate for an issuer to request a halt if the announcement will not be made promptly.
A halt says nothing about whether the coming news is good or bad. It is a mechanism for fairness.
Selective Disclosure
National Policy 51-201 is clear that telling someone about undisclosed material information outside the necessary course of business is tipping, and trading on it is insider trading. A confidentiality agreement does not create an exception. An analyst or investor who receives material undisclosed information becomes subject to the same restrictions. This is why companies decline to discuss results before they are released, even with long-time shareholders.
What Investors Can Check
- The timestamp. Note when the release crossed the wire, not just the date.
- The filing. Material change reports are filed on SEDAR+. Compare one with the news release it follows.
- Delays. If a release describes an event that happened weeks earlier, ask why.
- Halts. Treat a halt as a pause, and read the release that follows.
- The release itself. The news release reader helps break down a drill results release. Our exchange guide explains how the TSXV and CSE differ.
These are starting points for your own reading of the filings. For decisions, speak to your own adviser.
Frequently asked questions
- National Policy 51-201 Disclosure Standards (consolidated to June 9, 2023), Autorité des marchés financiers, for the Canadian Securities Administrators, 2023-06-09
- TSX Venture Exchange Corporate Finance Manual, Policy 3.3 Timely Disclosure, TSX Venture Exchange, 2026-05-21
- CSE Policy 5: Timely Disclosure, Trading Halts and Posting Requirements, Canadian Securities Exchange, 2026-07-30
This article is published by Bellmare Capital, a brand operated by Apollo Shareholder Relations, for information and education only. It is not investment advice, a recommendation, or an offer or solicitation to buy or sell any security. Bellmare Capital is not a registered investment adviser or dealer, and this is not independent research.
Apollo Shareholder Relations provides paid investor relations, marketing and communications services to public companies, including companies in the sectors Bellmare Capital writes about, and may be compensated in cash or securities. Apollo, its principals, employees and contractors may hold securities of companies discussed and may buy or sell them at any time. Where an article covers a company that pays Apollo, it is labelled Sponsored at the top with the compensation and holdings.
Information comes from public filings and other sources believed to be reliable, but its accuracy and completeness are not guaranteed, and it may be out of date. Small cap and junior resource companies are speculative and volatile, and investors can lose their entire investment. Bellmare Capital and Apollo Shareholder Relations accept no liability for any loss arising from use of this content. Read each company's own filings on SEDAR+ and consult a registered adviser before acting.
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