Sainsbury's has reclaimed its place as the UK's second largest grocery.
The supermarket took over from Asda in top spot for the first time since January.
It came against a backdrop of falling sides, with a slide of 0.3 per cent during the 12 weeks to to July 19.
Growth was driven by non-food sales and faster growth at its convenience stores in south east of England, where it has a large number of stores, according to independent analysis of the latest till roll figures.
Its market share also dipped from 16.6per cent to 16.5per cent in the period.
Asda was the biggest faller of the major supermarkets, seeing its sales fall 2.7per cent, and its market share slip from 17per cent to 16.4per cent.
Meanwhile, the Co-operative grew sales for the first time in a year, marking a highlight in a troubled two years for the group, according to the research by Kantar Worldpanel.
The troubled Co-op group increased sales by one per cent boosted by its expansion into convenience stores.
The chain returned to growth for the first time since July last year, although its market share remained at 6.3per cent.
The Co-op bank nearly collapsed in 2013 and dragged the wider Co-operative group to a £2.5 billion annual loss that year, after a £1.5 billion hole was discovered in the lender's balance sheet.
Fraser McKevitt, head of consumer and retail insight at Kantar Worldpanel, said: "The Manchester-based grocer's focus on its convenience offer has been rewarded with an increase in shopper numbers, which have risen by 133,000."
Overall, Kantar said supermarket sales rose 0.8per cent year-on-year across the sector, with growth and record market shares coming from smaller grocers as the UK's Big Four supermarkets all suffered falls.
The UK's major chains have fought a intense price war against discounters such as Aldi and Lidl over the last year. The falling price of stables such as eggs and bread, mean that the average grocery basket costs 1.6per cent less than last year.
By contrast, Aldi grew by 16.6per cent while Lidl saw growth of 11.3per cent, meaning both chains moved to record market share highs of 5.6per cent and 4per cent respectively.
Why are you making commenting on The Herald only available to subscribers?
It should have been a safe space for informed debate, somewhere for readers to discuss issues around the biggest stories of the day, but all too often the below the line comments on most websites have become bogged down by off-topic discussions and abuse.
heraldscotland.com is tackling this problem by allowing only subscribers to comment.
We are doing this to improve the experience for our loyal readers and we believe it will reduce the ability of trolls and troublemakers, who occasionally find their way onto our site, to abuse our journalists and readers. We also hope it will help the comments section fulfil its promise as a part of Scotland's conversation with itself.
We are lucky at The Herald. We are read by an informed, educated readership who can add their knowledge and insights to our stories.
That is invaluable.
We are making the subscriber-only change to support our valued readers, who tell us they don't want the site cluttered up with irrelevant comments, untruths and abuse.
In the past, the journalist’s job was to collect and distribute information to the audience. Technology means that readers can shape a discussion. We look forward to hearing from you on heraldscotland.com
Comments & Moderation
Readers’ comments: You are personally liable for the content of any comments you upload to this website, so please act responsibly. We do not pre-moderate or monitor readers’ comments appearing on our websites, but we do post-moderate in response to complaints we receive or otherwise when a potential problem comes to our attention. You can make a complaint by using the ‘report this post’ link . We may then apply our discretion under the user terms to amend or delete comments.
Post moderation is undertaken full-time 9am-6pm on weekdays, and on a part-time basis outwith those hours.
Read the rules here