1\begin{table}[htbp]\centering2\caption{Coverage of the 24 largest source feeds (snapshot of 1 November 2026)}\label{tab:coverage}3\small4\begin{adjustbox}{max width=\textwidth}5\begin{tabular}{lrrrrrrrr}6\toprule7Company & Banner & Channel & Listings & Active & Median days & Price events & Unit price & Brand \\8\midrule9Metro Inc. & Metro & online\_storefront & 16\,382 & 1\,540 & 50 & 63\,868 & 0.91 & 0.88 \\10Giant Tiger Stores & Giant Tiger & online\_storefront & 10\,352 & 9\,617 & 81 & 16\,810 & 0.74 & 1.00 \\11Société des alcools du Québec & SAQ & online\_storefront & 7\,477 & 3\,293 & 36 & 8\,153 & 1.00 & 1.00 \\12Metro Inc. & Super C & online\_storefront & 6\,418 & 857 & 48 & 15\,210 & 0.94 & 0.93 \\13La Boîte à Grains & La Boîte à Grains & online\_storefront & 6\,279 & 6\,000 & 75 & 11\,903 & 0.76 & 1.00 \\14Marché Nuvo & Marché Nuvo & online\_storefront & 6\,224 & 4\,970 & 75 & 8\,186 & 0.97 & 1.00 \\15Epipresto & Epipresto & online\_storefront & 6\,000 & 6\,000 & 75 & 5\,984 & 0.32 & 1.00 \\16Walmart Canada & Walmart & online\_storefront & 4\,601 & 922 & 19 & 7\,872 & 0.56 & 0.28 \\17Supermarché PA & PA Supermarché & online\_storefront & 3\,602 & 3\,554 & 81 & 6\,864 & 0.19 & 1.00 \\18Walmart Canada & Walmart & circular & 3\,330 & 219 & 8 & 3\,501 & 0.09 & 0.66 \\19Sobeys / Empire & IGA & online\_storefront & 3\,083 & 600 & 34 & 5\,848 & 0.95 & 0.94 \\20Metro Inc. & Marché Adonis & online\_storefront & 2\,950 & 447 & 52 & 5\,935 & 0.93 & 0.00 \\21Sobeys / Empire & IGA & circular & 2\,933 & 350 & 9 & 3\,527 & 0.03 & 0.75 \\22Aliments Merci & Aliments Merci & online\_storefront & 2\,859 & 2\,838 & 75 & 3\,367 & 0.05 & 0.85 \\23Loblaw Companies & Club Entrepôt & online\_storefront & 2\,808 & 763 & 74 & 68\,438 & 1.00 & 0.76 \\24Loblaw Companies & Maxi & online\_storefront & 2\,441 & 1\,086 & 78 & 13\,674 & 1.00 & 0.82 \\25Metro Inc. & Metro & circular & 2\,256 & 314 & 9 & 2\,871 & 0.01 & 0.00 \\26Loblaw Companies & Provigo & online\_storefront & 2\,138 & 450 & 77 & 5\,582 & 1.00 & 0.80 \\27Loblaw Companies & Maxi & circular & 2\,107 & 271 & 9 & 2\,341 & 0.62 & 0.85 \\28Metro Inc. & Super C & circular & 1\,954 & 192 & 9 & 2\,448 & 0.00 & 0.30 \\29Loblaw Companies & Provigo & circular & 1\,914 & 175 & 9 & 2\,035 & 0.55 & 0.79 \\30Metro Inc. & Marché Adonis & circular & 1\,882 & 203 & 9 & 2\,131 & 0.01 & 0.62 \\31Pasquier & Pasquier & circular & 1\,611 & 152 & 9 & 1\,727 & 0.21 & 0.75 \\32Loblaw Companies & Pharmaprix & circular & 1\,225 & 167 & 8 & 1\,378 & 0.51 & 0.51 \\33\bottomrule34\end{tabular}35\end{adjustbox}36\begin{minipage}{\textwidth}\footnotesize\vspace{2pt}37Listings = all uids ever observed in the feed (active and deactivated); Active = listed on 1 Nov 2026; Median days = median observation span; Price events = rows in the price log; Unit price / Brand = share of active listings with a parsable package size (re-parsed) / a brand field. Channel: online storefront vs weekly circular (Flipp, postal code H2X 1Y4). Full table of 54 feeds in the replication package.38\end{minipage}39\end{table}40