(ShareCast News) - Moneysupermarket.com slumped after founder Simon Nixon soid a 5.8% stake in the comparison website, pocketing a gross £98m.Nixon sold 32m shares at 305p each. He is now subject to a lock-up in respect of his remaining 38m shares, or 6.9% until the company's full-year results for the year to end-December are rfeported in March 2016.Nixon, who founded the business in 1993 and floated it on the London Stock Exchange in 2007, sold £56m worth of shares in April.Shares in the company fell 6.7% to 306p by 0840 GMT on Wednesday.