Sainsbury’s delivers biggest ever Christmas as Argos sales slip

Sainsbury’s won grocery market share for the sixth consecutive Christmas period after delivering its biggest festive trading performance to date.
In its third-quarter trading update for the 16 weeks ending 3 January 2026, the supermarket giant posted grocery sales growth of 5.4%, driven by increased customer switching and bigger basket sizes.
Sainsbury’s, which said it was the only major grocer to grow basket size over the period, reported that fresh food led performance, with sales