The chairman of Smart Metering Systems raised his stake in the company on Friday.Paul Dollman bought 5,000 shares for an individual price of 340.2p, spending a total of £17,010 in the transaction.After the purchase, Dollman holds 20,000 shares in the company, which represents 0.02% of its issued share capital.The chairman said last week the group has made significant progress in 2015 with revenues up 10% to £29m, which was in line with expectations."We continue to see the benefits of our expanded service offering across both the gas and electricity sectors and the positive impact of a fully integrated service in these markets for our customers," he said at the time.Top Director BuysHighcroft Investment (HCFT) Director name: Mr John HewittAmount purchased: 3,000 @ 930.00p Value: £27,900Smart Metering Systems (SMS) Director name: Mr Paul B DollmanAmount purchased: 5,000 @ 340.20p Value: £17,010Top Director SellsWorld Careers Network (WOR) Director name: Mr David MooreAmount sold: 75,000 @ 210.00p Value: £157,500