Permira, private equity firm and owner of Dr Martens, is reportedly planning to either float the British heritage footwear brand on the US stock market or sell it.

According to Sky News, Permira is preparing to hire bankers to oversee a review of its options for the company just six years after it purchased it from the founding Griggs family. While the amount it would be sold for is currently unclear, Sky’s sources suggested it could be worth well over double as much as the £300m Permira paid for it.

Dr Martens has been growing steadily since it was acquired by Permira in 2013, with the company reporting in the year to March 31, 2018, total revenue growth of 20% to £348.6 million ($454.9 million), while EBITDA rose by 33% to £50 million ($65.2 million).