(ShareCast News) - Four directors of Dotdigital Group have sold more than £1.6m worth of shares in the company, which they said was to satisfy institutional demand for the tightly held software company's stock.Co-founder Ian "Tink" Taylor, currently non-executive president of the group and chief operating officer of dotMailer, sold £1.1m worth at 42.29p. He still holds 12.5% of the £125m company.Chief financial officer Milan Patel, currently standing in as CEO as long-term boss Simone Barratt recovers from surgery in early January, sold £169,000.Peter Simmonds, previous chief executive officer at Dotdigital for eight years, let go of £254,000, while chairman Frank Beechinor offered up £42,000.Patel said: "Whilst directors still hold a significant position in dotdigital of over 20%, we are delighted with the investment interest in the company demonstrated by a number of our highly regarded current institutional investors as well as introductions to new funds, which we believe will continue to strengthen our shareholder base over the medium and longer term. This follows on from our recent intensive and extremely positive interim results roadshow."Top Director BuysWpp (WPP)Director name: Quarta,RobertoAmount purchased: 2,800 @ 1,558.00pValue: £43,624.00Equiniti Group (EQN)Director name: Wakeley,GuyAmount purchased: 25,000 @ 162.00pValue: £40,500.00Equiniti Group (EQN)Director name: Stier,JohnAmount purchased: 25,000 @ 162.00pValue: £40,500.00Stv Group (STVG)Director name: Cannon , Anne MarieAmount purchased: 9,042 @ 440.00pValue: £39,784.80St. Modwen Properties (SMP)Director name: Mully,Richard StephenAmount purchased: 10,000 @ 300.00pValue: £30,000.00Hgcapital Trust (HGT)Director name: Mountford,RogerAmount purchased: 2,008 @ 1,059.74pValue: £21,279.60Kainos Group (KNOS)Director name: Cowan,Alan Amount purchased: 10,000 @ 198.85pValue: £19,885.00Wpp (WPP)Director name: Begley ,Charlene TAmount purchased: 1,140 @ $22.00Value: $18,063.66Mercantile Investment Trust (the) (MRC)Director name: Tigue,JeremyAmount purchased: 849 @ 1,595.69pValue: £13,547.41Avon Rubber (AVON)Director name: Rennie ,Rob Amount purchased: 771 @ 763.50pValue: £5,886.59City Merchants High Yield Trust (CMHY)Director name: Taylor,Philip Amount purchased: 1,178 @ 172.26pValue: £2,029.22Close Brothers Group (CBG)Director name: Prebensen,PrebenAmount purchased: 11 @ 1,392.00pValue: £153.12Hammerson (HMSO)Director name: Drakesmith,TimonAmount purchased: 27 @ 556.50pValue: £150.26Barr (a.g.) (BAG)Director name: Memmott,Andrew LewisAmount purchased: 27 @ 555.00pValue: £149.85Barr (a.g.) (BAG)Director name: White,Roger AlexanderAmount purchased: 27 @ 555.00pValue: £149.85Barr (a.g.) (BAG)Director name: Kemp,Jonathan DavidAmount purchased: 27 @ 555.00pValue: £149.85Barr (a.g.) (BAG)Director name: Lorimer,StuartAmount purchased: 27 @ 555.00pValue: £149.85Novae Group (NVA)Director name: Fosh,Matthew KAmount purchased: 18 @ 831.00pValue: £149.58Zoopla Property Group (wi) (ZPLA)Director name: Chesterman,Alex Amount purchased: 63 @ 237.40pValue: £149.56Zoopla Property Group (wi) (ZPLA)Director name: Morana,StephenAmount purchased: 63 @ 237.40pValue: £149.56Daily Mail And General Trust A (non.v) (DMGT)Director name: Beatty,KevinAmount purchased: 19 @ 657.00pValue: £124.83Daily Mail And General Trust A (non.v) (DMGT)Director name: Morgan,Martin William HowardAmount purchased: 19 @ 657.00pValue: £124.83Daily Mail And General Trust A (non.v) (DMGT)Director name: Dutton,DavidAmount purchased: 19 @ 657.00pValue: £124.83Daily Mail And General Trust A (non.v) (DMGT)Director name: Daintith,StephenAmount purchased: 19 @ 657.00pValue: £124.83Top Director SellsDotdigital Group (DOTD)Director name: Taylor,Ian (Tink)Amount purchased: 2,500,000 @ 42.29pValue: £1,057,249.98Dotdigital Group (DOTD)Director name: Simmonds,Peter A.Amount purchased: 600,000 @ 42.29pValue: £253,739.99Dotdigital Group (DOTD)Director name: Patel,MilanAmount purchased: 400,000 @ 42.29pValue: £169,160.00Experian (EXPN)Director name: Pitchford,LloydAmount purchased: 13,716 @ 1,213.94pValue: £166,504.42Dotdigital Group (DOTD)Director name: Beechinor-Collins,FrancisAmount purchased: 100,000 @ 42.29pValue: £42,290.00Wpp (WPP)Director name: Richardson,PaulAmount purchased: 58,585 @ n/aValue: n/aWpp (WPP)Director name: Sorrell,Sir MartinAmount purchased: 81,492 @ n/aValue: n/a