Neil McConachie, president of Lancashire Holdings, has upped his stake in the FTSE 250-listed speciality insurance group, spending more than £230,000.Despite its name, Lancashire underwrites from offices in London and Bermuda and has a marketing operation in Dubai. Its main business areas are aviation, energy, marine and property.McConachie, who used to work for the accountancy firm PricewaterhouseCoopers in London and Bermuda, took 37,500 shares at 624p a pop. He now has 469,649. His latest purchase comes after several bouts of buying activity earlier in the month.The company last month posted a rise in quarterly profits, saying that damage caused by tornadoes in the US had a minimal effect on Lancashire.Top Director BuysLancashire Holdings (LRE) Director name: Mr Neil William McConachieAmount purchased: 37,500 @ 624.00p Value: £234,000Robert Walters (RWA) Director name: Mr Giles P DaubeneyAmount purchased: 21,455 @ 233.00p Value: £49,990F&C Asset Management (FCAM) Director name: Mr Edward BramsonAmount purchased: 28,840 @ 66.59p Value: £19,205DQ Entertainment (DQE) Director name: Mr Tapaas ChakravartiAmount purchased: 15,000 @ 73.00p Value: £10,950Top Director SellsRSA Insurance Group (RSA) Director name: Mr Adrian BrownAmount sold: 81,493 @ 114.50p Value: £93,309