Is Your Corporation's Transparency Register Actually Compliant? A 2026 Checklist for Ontario Private Companies

What is a transparency register?

A transparency register — sometimes called an ISC register or beneficial-ownership register — is a corporate record that identifies the real human beings who ultimately own or control a corporation. Ontario introduced the requirement for private OBCA corporations effective January 1, 2023 under section 140.2 of the Business Corporations Act (Ontario). Federally incorporated CBCA companies have had a similar register requirement since 2019, and since January 22, 2024 they must also file ISC information with Corporations Canada, portions of which are made publicly searchable.

The purpose is to make beneficial ownership visible to law enforcement, tax authorities, and financial regulators, and to reduce the use of Canadian corporations for money laundering, sanctions evasion, and tax avoidance. For a Mississauga business owner, the practical effect is simple: every private corporation you own needs an accurate ISC register, kept up to date, and reviewed at least once a year.

Who counts as an individual with significant control?

Under OBCA s. 1.1, an individual has significant control (an “ISC”) over a corporation if they hold, directly or indirectly, an interest or right in respect of a significant number of shares, or if they have direct or indirect influence that, if exercised, would result in control in fact.

A “significant number of shares” means shares carrying 25% or more of the voting rights, or shares equal to 25% or more of the outstanding shares by fair market value. Two or more people can also be ISCs jointly — for example, when spouses or family members hold shares under an agreement to vote together, or when related persons collectively hold 25% or more.

In a typical Mississauga owner-managed business, the ISCs are usually the founders and any family members with 25%-plus holdings. Complications arise when there are family trusts, holding companies stacked above the operating company, shareholder agreements with voting-pool arrangements, or nominee shareholders. Each of these can create ISCs who are not obvious from the share register.

What information must the register contain?

For each ISC, the OBCA register must include:

• Name, date of birth, and latest known address.
• Jurisdiction of residence for tax purposes.
• The day the individual became — and, if applicable, ceased to be — an ISC.
• A description of how the individual is an ISC (interests, rights, control).
• A description of the reasonable steps the corporation took to identify all ISCs and confirm the information.

CBCA corporations must record the same categories plus country of citizenship, and must also record an address for service if the individual does not want their residential address made public.

The 10-item ISC compliance checklist for 2026

Here is a practical checklist Mississauga owner-managers can walk through with their corporate lawyer before year-end.

1. Confirm whether you are OBCA or CBCA (or both, if you own a group). This determines which rules apply and whether federal filings are also required.
2. Locate your existing ISC register. If your minute book does not contain a separate register — or the register was set up in 2023 and has not been touched since — treat that as a red flag.
3. List every shareholder who holds, directly or indirectly, 25% or more of the shares or votes. Include family trusts, holdcos, and nominee arrangements.
4. For each ISC, confirm you have their full legal name, date of birth, latest known address, and tax-residence jurisdiction on file.
5. Document how each individual meets the ISC test (e.g., “50% direct holder of common shares,” “co-trustee of family trust holding 30% of Class A shares”).
6. Record when each ISC became — or ceased to be — an ISC. If someone came in or exited through a share transfer, freeze, or estate distribution, that date belongs in the register.
7. Document your reasonable-steps process. At least once each fiscal year, the corporation must take reasonable steps to identify all ISCs and confirm the information is accurate. Keep a short memo on file describing what you did.
8. Update within 15 days of learning anything new. The OBCA requires the register be updated within 15 days of the corporation becoming aware of a change.
9. If federally incorporated, confirm your latest ISC filing with Corporations Canada. Filings are due at the same time as the annual return, and within 15 days of any change.
10. Retain records for the required period. The OBCA requires disposal of personal information within one year after the sixth anniversary of the individual ceasing to be an ISC, unless another law requires longer retention.

Common gaps we see in Mississauga minute books

When we open a minute book to conduct an ISC review — often triggered by a bank refinancing, a new investor coming in, or a preliminary sale discussion — the same handful of gaps show up:

• The register exists but is out of date. It was set up in 2023 and no reasonable-steps memo has been filed for 2024, 2025, or 2026.
• Family trusts and holdcos are not traced through. The ISC register lists the holding company as a shareholder but does not identify the individuals behind it, which is not how the ISC rules work.
• The 25% threshold has been crossed and not recorded. A share issuance, redemption, or family transfer bumped someone across the line and the register was not updated within 15 days.
• Dates of birth or tax residence are missing. Shareholders were reluctant to share the information when the rules first came in, and the file never got completed.
• For federal corporations, the annual ISC filing was missed. Corporations Canada annual filings and ISC filings are separate steps in practice, and it is easy to file one without the other.

Why this matters: bank KYC, deal diligence, and personal exposure

Three real-world consequences make this more than a housekeeping item:

Bank and lender KYC. Canadian banks now routinely ask for ISC information as part of Know Your Customer procedures when opening or renewing commercial facilities. A stale or missing register can delay a refinancing at the exact moment you need it.

Deal diligence. Any prospective buyer or minority investor will ask for the ISC register early in diligence. If the register is empty or inconsistent with the share register, you will spend time cleaning it up under a signed letter of intent — the worst time to be doing paperwork.

Personal exposure for directors and officers. Under OBCA s. 258.1, a corporation that contravenes the transparency register requirements without reasonable cause is liable to a fine of up to $5,000. More importantly, a director or officer who knowingly authorizes, permits, or acquiesces in the corporation’s non-compliance — or who knowingly records or provides false or misleading ISC information — is liable to a fine of up to $200,000, imprisonment of up to six months, or both.

The penalties for federal CBCA non-compliance are substantially the same. Corporations Canada is also making some ISC information searchable to the public, which increases the practical scrutiny on the accuracy of the underlying records.

Frequently asked questions

What is an ISC register?

An ISC register (transparency register) is a corporate record listing every individual with significant control over the corporation, along with prescribed information about them and about how they meet the ISC test. It is required under OBCA s. 140.2 for most Ontario private corporations and under the CBCA for federal corporations.

Who counts as an individual with significant control?

An ISC is an individual who, directly or indirectly, holds 25% or more of the shares or voting rights, or has direct or indirect influence that would result in control in fact of the corporation. Two or more related people can be ISCs jointly if they hold interests together or vote in concert.

Are the consequences of non-compliance serious?

Yes. Under OBCA s. 258.1, corporate fines run up to $5,000 for a contravention of s. 140.2 without reasonable cause. Directors and officers who knowingly authorize, permit, or acquiesce in non-compliance — or who knowingly record false or misleading ISC information — can be personally liable to fines up to $200,000, imprisonment up to six months, or both.

Is my ISC information public?

For federal CBCA corporations, some ISC information filed with Corporations Canada is being made publicly searchable. For OBCA corporations, the register is not published to a public database; it is disclosed on request to police, tax officials, and specified regulators (including the Ontario Securities Commission, the Financial Services Regulatory Authority of Ontario, and FINTRAC).

How often do I have to update the register?

At least once each fiscal year, the corporation must take reasonable steps to confirm the register is accurate. In addition, changes must be recorded within 15 days of the corporation becoming aware of them.

Do numbered companies and small holdcos also need a register?

Yes. The rules apply to private OBCA and CBCA corporations regardless of size. Numbered holdcos, family real-estate holdcos, and single-shareholder operating companies all need an ISC register. The only broad exemptions are for reporting issuers, publicly listed corporations, Crown corporations, and their wholly-owned subsidiaries.

How Mann Law helps

For Mississauga owner-managers, Mann Law can conduct a scoped minute-book and ISC compliance review — typically alongside your accountant’s year-end file — to confirm your register meets the OBCA and CBCA requirements, that supporting documentation is on file, and that the reasonable-steps memo for the current year has been documented. Where the register needs to be rebuilt from source records (share certificates, resolutions, trust deeds), we can do that as a discrete project.

If your last minute-book review was more than 18 months ago, or if you are looking at a refinancing, share transfer, or investor conversation in the next 12 months, this is a reasonable file to open in Q4.