In November, the Reserve Bank estimated the Canterbury quakes will result in claims worth some $30 billion as local firms seek to recover costs from interrupted business, temporary accommodation, inflation and other adjustments.
Government officials have forecast the quakes caused more than $20 billion of damage to property in the region, though that predates the recent swarm of temblors since Christmas.
Woolworths, which completed a nationwide rebranding of its local chain to Countdown last year, has 158 stores in New Zealand. It is battling the three Foodstuffs cooperatives that operate the Four Square, New World and Pak'nSave chains.
Its annual revenue of $5.37 billion in the 2011 year compares to the combined revenue of $8.2 billion for the Auckland, Wellington and South Island Foodstuffs cooperatives.
In October, the Australian retailer said its New Zealand supermarkets boosted sales 3 per cent to $1.42 billion in the 14 weeks ended October 2.
That accounts for about 8.9 per cent of sales in Woolworths' supermarket division and 7.7 per cent of the entire group's A$14.6 billion in revenue.
Shares in Woolworths rose 2 per cent to A$25.71 in trading on the ASX yesterday.