(ShareCast News) - Atlas Mara Limited's directors are buying shares to increase their stake in the company.The company is continuing on its share buyback programme, with its latest purchase of 20,000 placed in treasury.However, a number of directors have taken the opportunity to increase their stake.Chief executive John Vitalo, chief financial officer Arina McDonald and directors Robert Diamond and Ashish Thakkar all increased their interest in the outfit.The biggest purchase came from Diamond who purchased 7,230 shares for $39,765 (£26,373).He now holds a 2.44% stake in the company.Top Director BuysFastjet (FJET) Director name: Mr Tim IngramAmount purchased: 150,000 @ 60.00p Value: £90,000Atlas Mara Limited (DI) (ATMA) Director name: Mr Robert E. DiamondAmount purchased: 7,230 @ $5.50 Value: $39,765Atlas Mara Limited (DI) (ATMA) Director name: Mr John VitaloAmount purchased: 5,790 @ $5.50 Value: $31,845Atlas Mara Limited (DI) (ATMA) Director name: Ms Arina McDonald Amount purchased: 4,320 @ $5.50 Value: $23,760Atlas Mara Limited (DI) (ATMA) Director name: Mr Ashish J. ThakkarAmount purchased: 4,020 @ $5.50 Value: $22,110There were no director sales at the time of publication.