London, January 6, 2026, 10:22 GMT — Regular session
- Tesco shares up 1.7% in early trade after market-share data hits highest since March 2015
- Worldpanel flags easing grocery inflation, a key input for pricing and volume expectations
- Tesco’s Jan. 8 Q3 and Christmas statement is the next catalyst on guidance and margins
Tesco PLC (TSCO.L) shares rose 1.7% in early London trade on Tuesday after industry data showed the grocer logged its highest UK market share since March 2015. Worldpanel by Numerator said UK grocery sales rose 3.8% to 13.8 billion pounds in the four weeks to Dec. 28 and Tesco’s share increased 20 basis points — 0.20 percentage point — to 28.7%, while grocery inflation eased to 4.3% from 4.7%; J Sainsbury was up 1.6% and online grocer Ocado climbed as much as 8.5%. 1
The figures give investors a quick read on the Christmas period, when supermarkets lean heavily on promotions to drive store visits. They matter because Tesco is due to publish its own third-quarter and Christmas update later this week, with the market looking for reassurance on profit margins.
Easing food inflation is not a straight win for grocers. Slower price rises can ease pressure on household budgets, but they can also limit sales growth that comes simply from charging more, shifting attention to volumes — the amount of goods sold — and how much discounting it took to win share.
Tesco said in a regulatory statement that it bought 454,043 shares on Jan. 5 under its 1.45 billion pound buyback programme, paying an average 440.49 pence per share, and will cancel them. Since the programme began in April 2025, Tesco has spent 1,430.1 million pounds to repurchase 347,018,791 shares, it said — a move that can lift earnings per share, or EPS, even if overall profit is flat. 2
Axel Rudolph, a senior market analyst at IG, said Tesco has held above a 435.5p–433.5p “support zone” — a chart area where buying has tended to emerge — keeping, in his words, “the long-term uptrend is deemed to be intact”. He flagged 446.2p as the next hurdle, with 456.6p–458.9p back in focus if the stock clears it. 3
That puts more weight on Thursday’s trading statement as the next directional catalyst for Tesco stock. Investors will be looking for evidence that market-share gains are translating into operating profit, not just higher promotional intensity.
With inflation still elevated, shoppers remain quick to trade down and switch stores, especially on staples. Tesco will need to show it can defend share without giving away too much on price, and that volumes stayed resilient through the peak weeks.
But the risk is clear: a tougher pricing round in 2026 could force supermarkets to cede margin to protect share, particularly if food inflation turns higher again or wage costs bite. Any disappointment on guidance, or signs of weaker post-Christmas momentum, would undercut the market-share narrative.
