Grocery retailers got a £200m boost from the jubilee, the latest data from Kantar Worldpanel shows.
Sales in the run-up to week ending 3 June were up 11.3% on the same week last year, according to Kantar - equating to £213m in extra business.
The boost meant helped sales for the three months to 10 June to grow by 3.2% compared to 2011.
“The remarkable growth rate recorded over the Jubilee is a sign of what’s to come during the Olympics, when we expect grocery sales to soar,” said Kantar’s Edward Garner.
“Competition is likely to be fierce with fortunes now considerably different among the big four.”
Sainsbury’s and Asda grew sales slightly ahead of the market, up 4.2% and 3.5% respectively, as Sainsbury’s grew its market share to 16.6%.
“The two retailers have taken different paths to growth, with Asda expanding its estate through its acquisition of the UK Netto stores and Sainsbury’s enjoying a long-term trend of organic growth as stores are added one-by-one,” said Garner.
“What both outlets have in common is strong price messages – Asda with its Price Guarantee and Sainsbury’s with its Brand Match. This is supporting them well.”
Tesco and Morrisons both saw their share of the market dip compared to the three-month period of last year. Tesco grew sales by just 1.8% as its share slipped from 31.4% to 31%. And sales were flat at Morrisons, as the Bradford-based supermarket saw its share slip from 12.2% to 11.8%.
At contrasting ends of the market, Waitrose, Aldi and Lidl all claimed record chunks of the market. Iceland also emerged as a winner, growing sales by 6.3% over the period.
Garner added: “This is largely a result of the buoyant frozen food market, which tends to do well during times of economic uncertainty, and is currently the fastest growing grocery sector.”