Steven Carter, the group chief executive of Informa, has significantly increased his holding in the company with the addition of 31,324 shares to his stake in the group. Carter, who now holds 36,324 shares, spent 475.30p apiece on the shares for a total payout of £148,883.The move came after Investec on Thursday lowered its target price on the stock from 500p to 482p, maintaining a 'hold' rating.Carter joined the group earlier this year and completed his first acquisition earlier this month when the group announced the purchase of a US trade show operator for £237m.Top Director BuysSchroders (SDR) Director name: Mr Massimo TosatoAmount purchased: 26,242 @ 2,682.00p Value: £703,810GETECH Group (GTC) Director name: Mr Peter StephensAmount purchased: 100,000 @ 44.00p Value: £44,000Augean (AUG) Director name: Mr Jim Meredith Amount purchased: 55,000 @ 50.00p Value: £27,500Omega Diagnostics Group (ODX) Director name: Mr David EvansAmount purchased: 173,500 @ 15.00p Value: £26,025Cyan Holdings (CYAN) Director name: Mr Henry (Harry) Berry Amount purchased: 7,000,000 @ 0.29p Value: £20,300Top Director SellsSolid State (SOLI) Director name: Mr John LaveryAmount sold: 400,000 @ 650.00p Value: £2,600,000Solid State (SOLI) Director name: Mr Gordon CombenAmount sold: 250,000 @ 650.00p Value: £1,625,000Solid State (SOLI) Director name: Mr William MarshAmount sold: 150,000 @ 650.00p Value: £975,000Solid State (SOLI) Director name: Mr Gary MarshAmount sold: 100,000 @ 650.00p Value: £650,000Solid State (SOLI) Director name: Mr Anthony B. FrereAmount sold: 50,000 @ 650.00p Value: £325,000Bango (BGO) Director name: Mr Anil MalhotraAmount sold: 9,330 @ 120.00p Value: £11,196