Cruddas may donate again once he clears his name And I felt I deserved better treatment from a lot of people and I didn't get it. And I felt disillusioned. In addition to his donations to the Conservatives, Mr Cruddas was the treasurer of the successful "No to AV" campaign in 2011, donating £600,000 personally to the battle to block the alternative vote system for parliamentary elections. He has also pledged to donate £100m to charities over 10 years through the establishment of his own foundation. Speaking to The Sunday Telegraph, Mr Cruddas, who recently retook day-to-day management of the financial trading firm, said he had not given any donations to the Conservatives since his resignation last March. He added: "For me to get closure on this - and I do need closure - that would entail me making a donation to the Conservative party ... and that means having a relationship with them." In the interview, Mr Cruddas, who turns 60 in September, also explained that when it comes to the time for CMC to go public - a 2006 float was pulled due to market turmoil - he will step down from the company. Well look, will we float the company? I think so, yes, we've got a lot of good people here and they need to be rewarded," he said. However he said it was not currently on the agenda, and wanted to run the business for at least the next five years. If I float the company, then it won't be me leading it. I would have to bring in a complete management structure, but I'm not ready to retire. Mr Cruddas also disclosed that Goldman Sachs, which bought a 10pc stake in CMC in November 2007 at the time valuing the business at £1.4bn, has since tried to increase its investment. They've never pushed me to float this company, they've only ever asked me to buy more shares and I turned them down.