A company listed in both Toronto and New York answers to two insider-disclosure regimes at once, and those two regimes do not run on the same clock. That one fact is more useful than it sounds. When an officer or director buys or sells stock they have to report it, but the when and the how varies a lot depending on which regulator is doing the asking. In the US, insiders file a Form 4 with the SEC within two business days of the trade. In Canada, they report through SEDI, and the window has historically been five calendar days. So for a company cross-listed in both markets, the Canadian feed can occasionally surface the same insider's activity on a different timeline than the US feed, and sometimes one lands before the other.
I spend a lot of time at Blockcircle staring at these feeds, and the thing that keeps me interested is that none of it is a loophole or a leak. It is all public, mandated disclosure. The edge, to the extent there is one, comes from the fact that seventeen-odd countries each built their own filing systems with their own deadlines and their own formats, and almost nobody has bothered to line them all up side by side.
Different regulators, different clocks
Once you start looking past the SEC, the variety gets genuinely strange. A rough tour of the ones we track:
- United States (SEC): Form 4, two business days after the trade. Fast, clean, machine-readable, the gold standard everyone else gets compared against.
- Canada (SEDI): insider reports filed through the System for Electronic Disclosure by Insiders, historically within five calendar days. Structured, but the interface feels like it was built in 2003 because it mostly was.
- United Kingdom: under the market abuse rules, persons discharging managerial responsibilities notify the issuer and the FCA, and the issuer makes it public, generally within a few business days. It arrives as a regulatory announcement rather than a tidy database row.
- Germany and France: similar managers'-transactions notifications under the EU regime, published through national channels and the issuers themselves, in formats that do not match each other even though the underlying law is shared.
- Japan, Hong Kong, Australia: each with its own disclosure obligation, its own language, its own PDF-versus-structured-data mix, and its own idea of what counts as a reportable transaction.
The point is not that any one of these is faster than the SEC in a way you can arbitrage on a stopwatch. It is that for a company with feet in two of these markets, you have two independent observers of the same insiders, filing on different deadlines into different systems. When one observer publishes and the other has not yet, you know something a US-only watcher does not, at least for a window. That window can be hours or it can be days, and it is not always in the same direction, which is exactly why you have to normalize everything before you can see it.
The unglamorous part is entity resolution
Here is where the actual work lives, and it is not exciting. Before you can compare a Canadian filing to a US filing for the same company, you have to be sure it is the same company. That sounds trivial until you try it at scale.
A cross-listed name might trade under one ticker in New York and a different one in Toronto, get identified by a CUSIP in North America and an ISIN abroad, and show up in a European feed under a legal entity name that is a subsidiary or a holding company rather than the ticker you know. The insider's own name gets transliterated differently across jurisdictions, or listed with a middle initial in one system and without it in another. Corporate actions, renames, and dual-class share structures make it worse. You end up building a graph that maps ISINs to tickers to legal entity identifiers to the human beings who file, and you spend a shocking amount of time on the boring reconciliation that makes the graph trustworthy.
None of that is glamorous, and that is the whole reason it holds up. Anyone can scrape one clean SEC feed. Almost nobody wants to normalize seventeen messy government feeds, half of which change their export format without warning and none of which agree on how to spell a person's name. The moat, if you want to call it that, is just a willingness to do tedious data plumbing that most people quit two feeds in.
Why it holds up, and why you should not oversell it
The reason this stays useful over time is structural. These are separate governments with separate legal traditions, and they are not going to harmonize their insider-reporting deadlines to make life easier for analysts. The friction is baked in. As long as a company is cross-listed, there will be two clocks, and as long as there are two clocks, the disclosure will sometimes arrive out of sync. You do not need it to be a big edge on every name. You need it to be a real, repeatable signal on the subset of names where the timing gap and the trade size line up.
Now the caveats, because I would rather undersell this than pretend it is magic:
- Data quality is uneven. Some feeds are richly structured. Others are scanned PDFs or regulatory news blurbs where you are parsing prose to figure out who bought how much. Confidence has to travel with each record.
- Some feeds are metadata-only. A few regimes will tell you a filing happened and roughly what kind, but the useful detail lands later or in a separate document. That changes what you can actually do with it.
- The timing gap is not guaranteed on any given event. Plenty of the time both feeds publish close together, or the foreign feed lags instead of leads. It is a distribution, not a rule, and you size accordingly.
- This is public-disclosure analysis, full stop. Every byte of it comes from filings that regulators require insiders to make public. There is nothing nonpublic, nothing shady, nothing that skirts a line. It is reading documents that are already on the record, just from more countries than most people bother to read.
At Blockcircle we treat insider disclosure as one input among several rather than a standalone crystal ball, and the cross-jurisdiction timing angle is a small, honest piece of that. It is not going to call the top for you. What it does is give you a slightly earlier, slightly more complete picture of what the people closest to a business are actually doing with their own money, assembled from feeds that were never designed to be read together. That is worth the plumbing, and if you ever decide to build it yourself, budget most of your time for the entity resolution and very little for the clever part.