Amlin independent non-executive director Sir Mark Wrightson has invested nearly £20,000 in increasing his stake in the Lloyds' insurance firm. Sir Mark bought 5,000 shares at 395.75p each, taking his stake to 13,888 shares. He also acquired 1,000 shares 395.26p a share in his position as a trustee of a trust. This non-beneficial interest cost just short of £4,000 more. Sir Mark is a member of the Panel on Takeovers and Mergers and he is a non-executive director of Domino Printing SciencesAmlin posted a 39% slump in pre-tax profit to £107.6m for the six months to June 2010 following big claims for natural disasters, although it indicated its confidence going forward by upping the dividend by 11% to 7.2p a share. The devastating earthquake in Chile and hurricane Xynthia in Europe both struck during February.Top Director BuysIFG Group (IFP) Director name: Mr Peter PriestleyAmount purchased: 39,834 @ 114.35p Value: £45,550Property Recycling Group (PROP) Director name: Mr Paul RackhamAmount purchased: 200,000 @ 12.00p Value: £24,000Amlin (AML) Director name: Sir Mark WrightsonAmount purchased: 5,000 @ 395.75p Value: £19,788Home Retail Group (HOME) Director name: Mr Oliver StockenAmount purchased: 5,741 @ 215.88p Value: £12,394Top Director SellsHome Retail Group (HOME) Director name: Mr Terry DuddyAmount sold: 129,911 @ 212.91p Value: £276,594Home Retail Group (HOME) Director name: Mr Richard AshtonAmount sold: 41,538 @ 212.91p Value: £88,439