The UK’s big supermarkets have increased their grip on the grocery retail sector, with market leader Tesco increasing its commanding share in the 12 weeks to 10 September while smaller retailers, primarily Kwik Save, showed considerable decline.

Discover B2B Marketing That Performs

Combine business intelligence and editorial excellence to reach engaged professionals across 36 leading media platforms.

Find out more


The UK’s number one supermarket saw its share of the market rise to 31.4%, up from 30.1% for the same period last year, TNS Worldpanel revealed yesterday (20 September).  


The survey found Asda, the UK unit of Wal-Mart, retained the hotly contested number two spot with a 16.7% share. However, Sainsbury’s sales showed a strong 8% growth rate and the retailer increased its share of the market to 15.9%. “If this continues then Sainsbury should see even higher market share at Christmas – traditionally a strong trading period for this retailer,” Edward Garner, director of research at TNS, observed.  


Since the acquisition of Safeway in 2005 Morrisons has struggled to maintain its market share, again showing a decline from 11.2% last year to 11% this year despite signs of recovery.


Upmarket supermarket Waitrose achieved a record 3.9% market share as it consolidated recent acquisitions.

GlobalData Strategic Intelligence

US Tariffs are shifting - will you react or anticipate?

Don’t let policy changes catch you off guard. Stay proactive with real-time data and expert analysis.

By GlobalData

Of the discount chains, the strongest performance came from Aldi with a share of 2.5% thanks to store extensions and acquisitions.


According to Garner, the growth of the big supermarkets came largely at Kwik Save’s expense. “The recovery of the two historically weaker retailers hasn’t prevented Tesco adding another 1.3 share points year-on-year – the brunt of the suffering is being borne by Kwik Save which has all but disappeared,” he commented.

Just Food Excellence Awards - Nominations Closed

Nominations are now closed for the Just Food Excellence Awards. A big thanks to all the organisations that entered – your response has been outstanding, showcasing exceptional innovation, leadership, and impact.

Excellence in Action
Winning five categories in the 2025 Just Food Excellence Awards, Centric Software is setting the pace for digital transformation in food and FMCG. Explore how its integrated PLM and PXM suite delivers faster launches, smarter compliance and data-driven growth for complex, multi-channel product portfolios.

Discover the Impact