(ShareCast News) - Glencore nearly bounced to pre-slump levels on Thursday, and director John Mack showed investors he's still backing the mining company.Shares in the FTSE 100-listed company dropped dramatically on Monday after Investec warned the stock holds little value for shareholders.But John Mack is putting nearly half a million pounds on the line after purchasing 550,000 shares as it looks to bounce back.Also betting on a healthy return was Stewart Kenny, non-executive director and co-founder of Paddy Power, who picked up €287,277 worth of shares.The biggest director sale of the day was Access Intelligence chairman Michael Jackson´s, who sold five million of his nearly 26m shareholding to pay for an accelerated payment notice from HMRC over his personal tax affairs.And with it being the start of a new quarter, a number of directors were awarded shares as part of incentive schemes, including directors of GlaxoSmithKline and Park Group. However, a number of Park Group directors cashed in part or all of their allocation.Top Director BuysGlencore (GLEN)Director name: Mr John J MackAmount purchased: 550,000 @ 80.78pValue: £444,290 Paddy Power (PAP)Director name: Mr Stewart KennyAmount purchased: 2,781 @ € 103.30Value: € 287,277 Barclays (BARC)Director name: Mr Tushar MorzariaAmount purchased: 76,191 @ 246.10pValue: £187,506 GlaxoSmithKline (GSK)Director name: Sir Sir Deryck MaughanAmount purchased: 3,658 @ 1,251.28pValue: £45,772 GlaxoSmithKline (GSK)Director name: Dr Stephanie BurnsAmount purchased: 3,104 @ 1,251.28pValue: £38,840 GlaxoSmithKline (GSK)Director name: Ms Lynn ElsenhansAmount purchased: 3,104 @ 1,251.28pValue: £38,840 GlaxoSmithKline (GSK)Director name: Dr Daniel (Dan) PodolskyAmount purchased: 2,744 @ 1,251.28pValue: £34,335 GlaxoSmithKline (GSK)Director name: Mr Philip R HamptonAmount purchased: 3,497 @ 1,251.00pValue: £43,747 River and Mercantile Group (RIV)Director name: Mr Kevin HayesAmount purchased: 14,000 @ 232.00pValue: £32,480 ITV (ITV)Director name: Mr Archie NormanAmount purchased: 12,675 @ 247.88pValue: £31,419 Top Director SellsAccess Intelligence (ACC)Director name: Mr Michael JacksonAmount sold: 5,000,000 @ 4.00pValue: £200,000 Experian (EXPN)Director name: Mr Lloyd PitchfordAmount sold: 18,082 @ 1,069.07pValue: £193,309 Park Group (PKG)Director name: Mr Marti StewartAmount sold: 212,494 @ 70.00pValue: £148,746 Park Group (PKG)Director name: Mr Christopher HoughtonAmount sold: 122,453 @ 70.00pValue: £85,717 Park Group (PKG)Director name: Mr Gary WoodsAmount sold: 100,881 @ 70.00pValue: £70,617