Dunkerton is supported by fashion entrepreneurs from veteran Harold Tillman to Asos founder Nick Robertson and Boohoo’s Mahmud Kamani.
Co-founder and 10% shareholder James Holder is also behind him.
Shareholder Aberdeen Asset Management is supporting current management, saying Dunkerton left after multiple profit warnings.
Dunkerton said: “The brand is brilliant; we are the only brand people are really proud to wear on the outside of their clothes with mass market appeal.”
“I am offering to go in and get the product and brand back on track. This is not about ego, or about me. This is about brand and product doing the right thing. It’s important we grasp there has been a mistake.”
Asked why he left the brand rather than attempt to change the strategy from within, he said: “I could see there was an absolute decision that this was what they wanted to do.”
Superdry chairman Peter Bamford said: “The Board of Superdry has huge respect for Julian Dunkerton as an entrepreneur and founder of the business. Julian has raised a number of issues with the board regarding strategy since he left the business. We have reviewed and discussed these issues and, while we have sympathy with some of his points, we have a different view on the best strategy or approach to addressing them.
“Superdry is an ambitious, global, multi-channel brand and the Board believes that Julian’s view of strategy has not evolved with the needs of the business. We remain fully committed to our successful global digital brand strategy and the board is confident that Superdry has in place the right leadership to ensure the continued development of our highly relevant brand.”