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A different question than the cap table
Your cap table answers who holds the shares. Beneficial ownership asks something the cap table often cannot: who are the actual human beings who ultimately own or control the company, once you look through the holding companies, trusts, partnerships, and nominees in between? A cap table can be perfectly accurate and still leave that unanswered. It shows that a numbered company holds forty percent; it does not show the person standing behind the numbered company. We wrote about how founders lose sight of their own ownership in why most founders don't know who actually owns their company, and beneficial ownership is where that gap becomes a legal obligation rather than just a bad habit.
Governments want this information for anti-money-laundering and tax-transparency reasons, so several jurisdictions now require companies to identify and record the individuals behind them. The three regimes most of our readers touch are Canada's register of individuals with significant control, the UK's register of people with significant control, and the United States' beneficial ownership information report under the Corporate Transparency Act. The underlying test is broadly similar in each: an individual generally counts if they own or control around twenty-five percent of the shares or votes, or exercise control in fact. What differs, and differs a lot, is what you have to do with that information, whether it is filed, whether it is public, and how stable the rule is. On that last point the US has been anything but stable, which is exactly why the durable answer is to treat beneficial ownership as a record you keep, not a form you file once and forget.
Canada: the ISC register
Federal corporations under the Canada Business Corporations Act must maintain a register of individuals with significant control, usually called the ISC register. An individual has significant control if they own, control, or direct twenty-five percent or more of the voting shares, or shares worth twenty-five percent or more of the fair market value, or if they have control in fact over the corporation by any means. Two or more people acting jointly can hold significant control together, which is where shareholder agreements and family holdings often pull people into the register who did not expect to be there.
The register is not just a list of names. For each individual it has to record the nature and start date of their significant control, their address, their jurisdiction of tax residence, and the date they were entered and removed. The corporation has to keep it current, review it at least once a year, and take reasonable steps to identify who belongs on it. Since early 2024, CBCA corporations also file ISC information with Corporations Canada, and some of that information is publicly searchable. Many provinces have adopted their own transparency-register requirements as well, and they do not all line up with the federal rules or with each other, so a corporation and its subsidiaries can face several versions of the same obligation at once. We touched on that terminology and jurisdictional patchwork in corporate records or minute book.
The UK: the PSC register
UK companies keep a register of people with significant control, the PSC register, and file that information with Companies House, where it is publicly available. The conditions are spelled out more explicitly than in Canada. A person is a PSC if they hold more than twenty-five percent of the shares, or more than twenty-five percent of the voting rights, or the right to appoint or remove a majority of the board, or if they otherwise exercise significant influence or control over the company.
Because the PSC register is filed and public, the UK version is less about keeping a private book and more about keeping the public record accurate and up to date as ownership changes. A PSC who acquires or crosses a threshold, or ceases to be one, is an event the company has to record and report, not something to reconcile only at year end. The discipline it rewards is the same one that keeps any register honest: capture the change when it happens, not when someone asks.
The US: BOI, the CTA, and a moving target
The United States introduced beneficial ownership reporting through the Corporate Transparency Act, with reports filed to FinCEN rather than kept as a company register. A beneficial owner is an individual who either exercises substantial control over the company or owns or controls at least twenty-five percent of it. Reporting began on January 1, 2024, and for a time most private companies formed in the US were expected to file.
Then it moved. In an interim final rule announced on March 21, 2025, FinCEN exempted entities created in the United States, and their US beneficial owners, from the reporting requirement, narrowing it to certain entities formed abroad that register to do business in a US state. As of the middle of 2026, that is where it stands: most US domestic companies are not required to file BOI, a final rule was working its way through review, and bills in Congress could change the picture again. Treat any specific statement about who has to file, including this one, as a snapshot rather than a settled rule, and confirm the current position before you rely on it. This is general information, not legal advice.
The instability is the lesson. A company that treated its 2024 BOI filing as a one-time task, then stopped tracking who its beneficial owners were once the domestic requirement lapsed, has quietly lost the thread of its own control just as surely as one that never filed. The filing obligation flickers on and off. The underlying facts, and everyone else's interest in them, do not.
The through line: a record, not a filing
Strip away the three names and the differing filing rules and the same obligation is underneath: know, and be able to show, who ultimately owns and controls the company. Whether or not a given government currently wants the form, other people will keep asking the question. A bank running know-your-customer checks to open or keep an account will ask. An investor's counsel will ask in diligence. An acquirer will ask. An auditor will ask. A future version of the same regulator, after the next rule change, may ask again and expect you to have kept up.
That is why the register belongs with your corporate records, maintained continuously, rather than in a filing you did once and cannot reconstruct. A beneficial ownership record you can produce on demand, current as of today and traceable back through every change, answers all of those questioners with one artifact. One assembled from memory the week a bank or a buyer asks is where the errors and the delay come from, the same pattern we described for records generally in the records findings that delay closings.
Where the register has to reconcile
A beneficial ownership register is only trustworthy if it reconciles to the records that feed it. It sits downstream of the cap table and the minute book, and it drifts the moment those move without it. When shares are issued or transferred, when a holding company is inserted above the operating company, when a shareholders' agreement gives someone the right to appoint directors, the set of people with significant control can change, and the register has to change with it.
So the same reconciliation test we have applied across this series applies here too. For every individual on the register, can you trace the ownership or control that put them there back to the actual holdings on the cap table and the instruments in the minute book? And going the other way, does every position on the cap table that crosses the threshold, directly or through an entity, appear on the register? A twenty-six percent holder who never made it onto the ISC or PSC register is the same class of gap as an issuance with no authorizing resolution, which we covered in who authorized this issuance. The register is not a separate exercise; it is a view of the ownership record we described in your cap table is not your corporate record, resolved down to the human beings.
The cross-border trap
The founders most exposed here are the ones operating across borders, because they face more than one of these regimes at once and the regimes do not align. A Canadian company that flips to a Delaware parent now has a Canadian ISC obligation on the subsidiary and a US framework on the parent that has itself changed twice, and the two use different thresholds, different definitions of control, and different rules about what is filed and public. We wrote about how a flip doubles the corporate record in the Delaware flip, done right and why Canadian founders end up with two sets of corporate records; beneficial ownership is one more layer that doubles with it.
Groups with several entities have the same problem multiplied. Each entity may have its own register obligation, and an individual's significant control often has to be traced up through the group structure rather than read off any single cap table. Keeping that straight across a portfolio is exactly the multi-entity recordkeeping challenge we described in how to manage corporate records across multiple subsidiaries. The jurisdiction-by-jurisdiction detail is why we maintain per-jurisdiction guidance in our jurisdiction guides, and why keeping the register beside the records it derives from matters more the more borders you cross.
The bottom line
ISC, PSC, and BOI are three names for the same question: who really owns and controls this company, once you look past the entities to the people? The filing rules differ by country and, in the US, keep changing. The obligation to know the answer, and to prove it to a bank, an investor, an auditor, or the next regulator, does not.
Keep a beneficial ownership register as a living part of your corporate records, reconciled to the cap table and the minute book and updated the moment control changes, and you can answer whoever asks with a record that holds up. Treat it as a form you filed once and the honest answer to who owns the company becomes something you have to reconstruct under pressure, which is the one time you cannot afford to get it wrong. Our digital corporate records keep the register beside the ownership data it depends on, so it stays current instead of going stale between rule changes.
