* https://old.reddit.com/r/ontario/comments/xqigdu/profit_marg...
But it's also true that prices jumped, but margins were unchanged, so they were making more money for the same work. In an efficient market, you'd expect margins to drop. (Unless it can all be explained by inflation of course and that extra money gets you as far as it used to).
It doesn't seem to be the case. I am just gonna look at Loblaw/Choice, but I imagine the other would not be too different. Loblaw had a revenue of 55.25B and a net income of 2.12B [1], bringing the profit margin to 3.84% over the previous 12 months. Choice's revenue was 1.34B [2] over the same period. Even if the entire revenue was pure profit for Loblaw, it would bring Loblaw's profit margin to (2.12 + 1.34) / 55.25 = 6.3%. This seems higher, but still not remotely high enough to explain the price increases.
But more importantly, Choice REIT's revenue has been fairly consistent over the past couple of years. There is no sudden increase in the past year or so to coincide with the price increases. So the extra price is NOT getting passed from Loblaw to Choice. Choice gets the same amount it was getting in 2019 more or less. Choice's total revenue has been 1.29B (2019), 1.27B (2020), 1.29B (2021), and 1.28B (past 12 months) [3].
Disclaimer: I am not well-versed in the field of finance, so I may have misunderstood the statistics. Please double-check them from the links below if you so prefer. I do not understand why the revenue in the statistics page is 1.34B, but total revenue in the financials page is 1.28B. But the difference is small enough not to change the conclusions either way.
[1] https://ca.finance.yahoo.com/quote/L.TO/key-statistics?p=L.T...
[2] https://ca.finance.yahoo.com/quote/CHP-UN.TO/key-statistics?...
[3] https://ca.finance.yahoo.com/quote/CHP-UN.TO/financials?p=CH...