Walker Greenback's Chief Executive Officer, John Sach, has sold 100,000 ordinary shares in the company on the same day the luxury interior furnishings group reported an increase in half year sales. The boost to sales came after an upturn in the US interior furnishings industry despite the fact that sales in Western Europe continued to be hampered by economic problems. Following the £71,500 purchase, Sach now holds just over 1.4m shares, equal to 2.39% of the total voting rights in the company.The group, which designs and manufactures fabrics, wallpapers and furnishings and whose brands include Sanderson, Morris & Co and its new contemporary brand Harlequin & Scion, said brand sales in the US jumped 21.5% in the half year to July 31st 2012 and 18% at constant currency. Brand sales in the UK, its largest market, were up by 5.6%. Sales were up 13% in the Far East and rose 9% in Eastern Europe. However, sales in the Eurozone declined by 11.6% or 6% in constant currencies as difficult market conditions persisted. The stock has risen by more than 50% over the past year, equal to 23.75p.Top Director BuysKingfisher (KGF) Director name: Mr Pascal CagniAmount purchased: 30,000 @ 263.49p Value: £79,047Alkane Energy (ALK) Director name: Mr Roger McDowellAmount purchased: 250,000 @ 20.45p Value: £51,125WYG (WYG) Director name: Mr David JeffcoatAmount purchased: 95,441 @ 52.12p Value: £49,744PureCircle Ltd. (DI) (PURE) Director name: Ms Mei ("May") Sian TanAmount purchased: 20,000 @ 215.00p Value: £43,000Redhall Group (RHL) Director name: Mr David JacksonAmount purchased: 38,190 @ 51.76p Value: £19,767Redhall Group (RHL) Director name: Mr David JacksonAmount purchased: 25,000 @ 52.00p Value: £13,000Top Director SellsWalker Greenbank (WGB) Director name: Mr John SachAmount sold: 100,000 @ 71.50p Value: £71,500