Powell, who was promoted to CEO from head of Warehouse Stationery in 2011, says the company is making up for a decade of underperformance.
Founder Stephen Tindall "did an amazing job" in the retailer's first two decades "then we just had a lost decade, we lost our way for 10 years," Powell said.
He also acknowledged previous missteps at the retailer, including 2008's Project Invigorate that took 500 workers out of the stores and didn't leave enough to stock the shelves.
Warehouse has made four acquisitions in the past six months - online retailer Topedo7, appliance retailer Noel Leeming, specialist importers Insight Traders (which has sourced perfumes among other lines) and online distribution firm Complete Entertainment Services.
Torpedo7, which began as an online retailer for mountain bikers, is to get an expanded product range as the group leverages its combined buying power, Powell said. The online company as was attractive because of its growing proportion of sales in Australia, a market where Warehouse has no plans to return as a bricks and mortar retailer.
Warehouse shares rose 1.4 per cent to $3.74 and have climbed 20 per cent this year. They're rated 'hold' based on the consensus of six analysts compiled by Reuters.