(ShareCast News) - TalkTalk's chief executive Dido Harding treated herself to some shares in the company as its stock rocketed following well-received first half results.Harding purchased 40,966 shares for 244.10p each, bringing her total holding to 4.3m, or a 0.45% stake.TalkTalk announced a 15% uplift to its interim dividend earlier, surprising investors and analysts who had been bracing themselves for a cut following the cyber attack in October.The telecommunications company estimated the one-off financial impact of the hack at between £30m and £35m, which Bank of America Merrill Lynch said was half the amount it was expecting.TalkTalk said that while it is still too early to assess the wider impact of the attack on the business, early data on churn and retention activity in the days since it happened is encouraging.At 1551 GMT, shares were up 14.6% to 249.00p.Top Director BuysHibernia Reit (HBRN) Director name: Mr Kevin Nowlan Amount purchased: 4,101,179 @ € 1.18 Value: € 4,823,397Hibernia Reit (HBRN) Director name: Mr William NowlanAmount purchased: 2,050,589 @ € 1.18 Value: € 2,411,698Electra Private Equity (ELTA) Director name: Mr Edward BramsonAmount purchased: 29,084 @ 3,616.00p Value: £1,051,677TalkTalk Telecom Group (TALK) Director name: Mr Dido HardingAmount purchased: 40,966 @ 244.10p Value: £99,998Top Director SellsSomero Enterprises Inc. (DI) (SOM) Director name: Mr Lawrence Horsch Amount sold: 55,000 @ 129.00p Value: £70,950