TSX Composite Rule Change Opens the Index to Foreign Firms
S&P Dow Jones Indices will let companies listed on the Toronto Stock Exchange but neither domiciled nor incorporated in Canada qualify for the S&P/TSX Composite and the other S&P/TSX indexes, a change that takes effect before the open on Monday, December 21, 2026, alongside the December quarterly rebalance.
The change was first reported by The Globe and Mail on September 11 and carried on the Reuters wire on September 13. Reuters reported that it follows a consultation S&P launched in July.
Until now, the gate was simple and absolute. A company either was Canadian by domicile or incorporation, or it was not in the index, no matter how much of its business sat in Canada. From December, a foreign issuer listed on the TSX can qualify if it has a material and substantive connection to Canada, on top of the size and liquidity thresholds every constituent already has to clear. The full rulebook is set out in the S&P/TSX Canadian Indices methodology.
Full weight, not half
The detail that matters most to anyone who owns a Canadian index fund is how much of a qualifying foreign company goes into the benchmark. The answer is all of it. Foreign issuers are included at full float-adjusted market capitalization, the same basis as every domestic constituent.
That was not the original plan. According to Reuters, S&P had floated a 50% foreign-issuer factor, which would have halved the index weight of a qualifying foreign company, and dropped it after market feedback. The difference between the two versions is not cosmetic. A half-weight rule would have let foreign issuers into the Composite while keeping them structurally minor. Full weight means a large TSX-listed foreign issuer can sit near the top of the index on exactly the same terms as a Canadian bank or railway.
S&P will review foreign-issuer eligibility each September, with additional reviews as needed, including on the completion of a cross-border merger, per the Reuters report.
Why the rules were straining
The case for the change is visible in what has already left the index this month. Three situations, all different, all with the same effect on the benchmark.
ARC Resources was removed from the Composite prior to the open on September 2 after shareholders agreed to a cash-and-stock merger with Shell PLC. Under the terms set out in the S&P Dow Jones Indices announcement of August 27, each ARC share was exchanged for 0.40247 new Shell shares plus $8.20 CAD in cash. Shell is UK-listed, so a substantial Canadian energy producer left the Canadian index outright.
SECURE Waste Infrastructure left for a different reason. GFL Environmental closed its acquisition of SECURE on August 31, announcing it on September 1, funded in part by 75,126,306 subordinate voting shares and a $1 billion USD term loan priced at SOFR plus 200 basis points. SECURE was delisted from the TSX at the close on September 2 and removed from the Composite before the open on September 4. This one is domestic consolidation rather than a foreign exit, since GFL is Toronto-based and TSX-listed, but it still means one fewer line in the index and more of it concentrated in the acquirer.
Teck Resources is the forcing event. The all-stock merger with Anglo American, valued at $53 billion USD, creates a combined company called Anglo Teck that The Globe and Mail reported will be headquartered in Vancouver with its primary listing in London. Under the old domicile test, that structure would have pushed one of the largest Canadian mining names out of both the Composite and the TSX 60 at closing. Under the new test, it can stay. A portfolio manager quoted by Reuters called continued inclusion highly likely, citing the Vancouver head office and the company’s Canadian spending.
The deal is not done. It still awaits Chinese regulatory approval, and the timeline has already moved markets. Teck shares (TSX: TECK-B) fell 6.24% to $91.21 on September 10, and our coverage of that session laid out the mechanics: Teck’s September 1 update set an eleven-trading-day runway from the satisfaction of conditions to completion, and reiterated that Anglo American must pay a special dividend of roughly $4.5 billion USD, with the payment window extended to 45 days after the effective date. Prices as of the September 10 close.
What it means if you own XIC or XIU
Most Canadians who own the Composite own it through a fund. XIC tracks the S&P/TSX Capped Composite and XIU tracks the S&P/TSX 60, and both are covered in our ranking of the core index ETFs. Neither fund makes a judgment call on any of this. They hold what the index defines, which is why a methodology change is a portfolio change.
Until now, when a constituent was absorbed by a foreign-listed buyer, the index dropped it and every fund tracking the index sold it. From December 21, a TSX-listed company with a genuine Canadian footprint can stay in the benchmark at full weight even if it is incorporated or primarily listed abroad.
There is a real trade-off in that, and it is worth stating plainly rather than dressing up. The Canadian index becomes less strictly Canadian-domiciled. What a holder owns through a Composite fund can now include companies incorporated outside Canada, chosen on a connection test rather than a legal domicile test. The argument for it is that domicile was always a proxy for Canadian economic exposure, and a poor one once cross-border mergers started redrawing corporate structures around names whose mines, wells and employees never moved. The argument against it is that a proxy is at least objective, and a connection test requires judgment that a domicile test did not.
What to watch
Three things carry from here. Chinese regulatory approval on Anglo Teck, which determines whether the most prominent test case for the new rule arrives at all. The December 21 rebalance, which is when the rule and the quarterly index changes land together. And the first annual foreign-issuer eligibility review in September 2027, which will show how broadly S&P intends to read a material and substantive connection to Canada.
None of this changes the index today. The S&P/TSX Composite closed Thursday, September 17 at 35,874.26, up 1.08%, the session after the Federal Reserve raised its policy rate to 3.75-4.00%, and a week after touching a five-week low of 35,506.28 on September 10. Data as of the September 17 close. The rule that decides what belongs in that number changes in December.
Disclaimer: The content on bestcanadianstocks.ca is for informational and entertainment purposes only and does not constitute financial advice. Past performance is not indicative of future results. Always consult a qualified financial advisor before making investment decisions. Index data as of the September 17, 2026 close. Rule-change details verified against Reuters reporting of the S&P Dow Jones Indices announcement; transaction terms from the S&P DJI and GFL Environmental releases linked in the article.
