The grocery market enjoyed a record £2.5bn spend over the Easter period as warm weather and the late Easter bank holiday boosted sales.
Sainsbury's retook second place by market share having been surpassed in March but saw sales decrease 1.2%.
Tesco maintained its position as market leader with more than three quarter of British households visiting the grocer over the period, more than 5 million more than its two closest rivals according to Kantar.
Asda benefited from a larger average basket size as well as increased visit frequency but slipped into third place behind Sainsbury's.
Aldi was the fastest growing supermarket in the period.