Chris Ellis, the Chief Financial Officer of Hydrodec, an AIM-listed cleantech industrial oil re-refining group, has purchased 447,849 ordinary shares in the company at 10.75p per share. This is his first purchase of the company´s stock since joining in July of this year. Non-Executive Director Andrew Black yesterday swelled his stake in the firm, adding five million shares at 9.89p each, for a total of £494,500. Following the purchase Black holds 68.98m ordinary shares in the company, equal to 16.8% of the issued voting share capital. The company last week appointed Lord Colin Moynihan as its new Chairman. Moynihan was until recently the Chairman of the British Olympic Association and also served as the parliamentary Minister for Energy between 1990 and 1992. The company has had a good week, with shares up 12%, equal to 1.12p. Over the past 12 months the stock has risen 2.44%, equal to 0.25p. Top Director BuysHydroDec Group (HYR) Director name: Mr Andrew BlackAmount purchased: 5,000,000 @ 9.89p Value: £494,500F&C Asset Management (FCAM) Director name: Mr Edward BramsonAmount purchased: 30,000 @ 95.31p Value: £28,593Spectra Systems Corporation (SPSY) Director name: Dr Nabil LawandyAmount purchased: 65,000 @ 40.00p Value: £26,000Spectra Systems Corporation (Reg S) (SPSC) Director name: Dr Nabil LawandyAmount purchased: 35,000 @ 40.00p Value: £14,000Banco Santander SA (BNC) Director name: Ms Esther Giménez-Salinas i ColomerAmount purchased: 2,100 @ 461.12p Value: £9,684Top Director SellsSEGRO (SGRO) Director name: Mr Andy Gulliford Amount sold: 7,238 @ 239.21p Value: £17,314SEGRO (SGRO) Director name: Mr Phil Redding Amount sold: 5,978 @ 239.21p Value: £14,300