The group, which also includes Kingsmill bread, Twinings tea and Ovaltine among its brands, said Primark sales rose by 14% since the start of March, compared with the 25% gain seen in the previous six months.
It described Primark’s trading as resilient against a worsening consumer environment.
But it said like-for-like sales were held back by weak trading in April, when comparisons with a year earlier were affected by poor weather and Easter.
Soaring food prices meant grocery revenues rose by 30% in the 16 weeks to June 21.
AB Foods said Twinings and Ovaltine performed strongly, while its Allied Bakeries arm continued its recovery with higher sales volumes and an improved operating performance.
AB Foods said trading overall since March had been in line with expectations – with profits for its non-sugar divisions set to show progress in the second half of the year.
It added in a trading update: “Continued high commodity costs and substantial increases in energy prices are a significant feature of the trading environment. Difficult economic conditions are having an impact on consumer demand.”
The 14% increase in sales at Primark reflected the addition of new store space, including new sites at Basingstoke and Ealing and others in Spain. The business had 179 stores and 5.2m sq ft of selling space at the end of June.
As a result of the growth, AB Foods said options were being considered for an increase in warehouse capacity in the UK and Ireland.