Robert Ware, a non-executive director at Tarsus, has used the recent dip in the media group's share price to top up his stake.The business-to-business company, which works in the exhibitions, conferences, education, publishing and online media sectors, said that Ware purchased 5,750 shares at a price of 209p each on Thursday.The transaction came after the stock fell to a four-month low of 205.25p on Wednesday.The £12,018 deal lifted his stake to 301,585 shares, equal to a 0.3% holding.Ware, who has been with the company since 2000, is currently the chief executive of AIM-listed investment firm Conygar.Tarsus shares have fallen steadily since its half-year report on 30 July despite headline results broadly beating analysts' estimates, with like-for-like revenues up 9%.Numis Securities said interim numbers beat its own forecasts, but estimates for the full year would likely be cut due to currency movements, in particular a strong pound against the dollar.Top Director BuysAfrica Oilfield Logistics Ltd (AOL) Director name: Mr Carl EspreyAmount purchased: 277,778 @ 9.00p Value: £25,000Africa Oilfield Logistics Ltd (AOL) Director name: Mr Andrew Stuart GrovesAmount purchased: 277,778 @ 9.00p Value: £25,000Africa Oilfield Logistics Ltd (AOL) Director name: Mr Philippe (Phil) Henri EdmondsAmount purchased: 277,778 @ 9.00p Value: £25,000Africa Oilfield Logistics Ltd (AOL) Director name: Mr Ian Mann Amount purchased: 277,778 @ 9.00p Value: £25,000Sage Group (SGE) Director name: Mr Neil BerkettAmount purchased: 3,850 @ 389.37p Value: £14,991Feedback (FDBK) Director name: Mr Trevor Brown Amount purchased: 1,000,000 @ 1.45p Value: £14,500Tarsus Group (TRS) Director name: Mr Robert T E WareAmount purchased: 5,750 @ 209.00p Value: £12,018Top Director SellsSage Group (SGE) Director name: Mr Neil BerkettAmount sold: 3,851 @ 389.37p Value: £14,995BC