Jean-Charles Tschudin, a non-executive director at the skin care products supplier Sinclair Pharma, has added to his holding in the company with the purchase of 56,000 shares at 36p a time.He now has 967,117 shares, which is about 0.4% of the company.Top Director BuysQatar Investment Fund (QIF) Director name: Mr David von SimsonAmount purchased: 75,000 @ $0.93 Value: $69,750Sinclair Pharma (SPH) Director name: Mr Jean-Charles TschudinAmount purchased: 56,000 @ 36.00p Value: £20,160Witan Inv Trust (WTAN) Director name: Mr Robert W BoyleAmount purchased: 2,024 @ 525.00p Value: £10,626Top Director SellsTitan Europe (TSW) Director name: Mr Erwin Henryk BilligAmount sold: 40,000 @ 109.00p Value: £43,600