Steven Dance, an Executive Director at support services and construction group Interserve, benefitted from the stock's impressive rise so far this year by raising half a million pounds after the sale of shares post-exercise.The company said on Friday that Dance, who joined the board back in 2008, exercised options over 83,489 shares in the company and subsequently sold them at a price of 576.4679p each, raising £481,287.His total holding following the transaction was unchanged at 101,296 shares, equal to a 0.08% stake in the company and valued at around £0.59m at current market prices.The move came a month after Interserve's first-half results in which it reported that revenues rose 8.6% to £1.07bn in the six months to June 30th, while pre-tax profits were up 7.6% at £36.8m.The stock has gained nearly 50% since the start of the year.Top Director BuysAlliance Trust (ATST) Director name: Mr Karin Forseke Amount purchased: 10,000 @ 435.40p Value: £43,540CLS Holdings (CLI) Director name: Mr Sten A MortstedtAmount purchased: 2,000 @ 1,169.00p Value: £23,380Top Director SellsInterserve (IRV) Director name: Mr Steven DanceAmount sold: 83,489 @ 576.47p Value: £481,287Enterprise Inns (ETI) Director name: Mr W Simon TownsendAmount sold: 100,000 @ 250.00p Value: £250,000WPP (WPP) Director name: Mr Mark ReadAmount sold: 12,965 @ 1,281.00p Value: £166,082