The nation's largest supermarket operators have all struggled to maintain momentum over the past few quarters, according to Grocery Dive, underscoring the tough conditions the industry is facing.

The pattern spans the biggest players in U.S. food retail. Identical-store sales growth — a core measure of health for grocery chains, since it strips out new locations — has withered away across the sector rather than at any single company.

That breadth matters. When every major operator loses comparable-sales traction at the same time, the pressure points to conditions affecting the whole industry rather than one retailer's execution. Shoppers are pulling back, competition is intensifying, or both forces are working together against traditional supermarkets.

For marketers and suppliers, fading identical-store sales growth is a demand signal. It means grocers are fighting harder for each incremental basket, and promotional budgets, loyalty programs and trade spend will likely come under sharper scrutiny as operators look to reignite traffic.

The trend has built over multiple quarters, not a single reporting period. Grocers who counted on post-pandemic momentum have watched that tailwind fade, leaving them to compete for growth in a market where volume gains are scarce.

How the largest operators respond — through pricing, promotions or format changes — will shape the competitive picture for the rest of the grocery sector in the quarters ahead.