(Sharecast News) - Several of Tesco's top directors bought into the company's shares over the back half of the week, including its boss Dave Lewis and the grocer's finance chief, Alan Stewart.Both Lewis and Stewart picked-up 50,000 shares at 213.7p apiece for a total disbursement of £106,850 each one on 5 October.They were preceded the day before by non-executive directors Mikael Olsson and Alison Platt, who bought 10,000 shares at 215.4p and 16,286 shares at 214.5p, respectively.But the first two buy in was chairman John Allan, who purchased 12,000 shares at 221.7p on 3 October, followed by another 10,000 at 211.7p on 4 October, for a combined transaction value of £47,774.On 3 October, Tesco reported a 42% increase in first-half profits and boosted its dividend as sales accelerated in the second quarter thanks to the £4bn acquisition of Booker.That was on the back of a 12.8% jump in total sales to £28.3bn with like-for-like sales upby 2.2%.However, operating profits of £933m on an EBIT basis had fallen 4.6% short of the consensus estimate, triggering a sharp fall in the share price, dragging the company's stock well below its 200-day moving average and a smidgen below their 200-week moving average.Top Director BuysTesco (TSCO)Director name: Lewis,DaveAmount purchased: 50,000 @ 213.70pValue: £106,850.00Tesco (TSCO)Director name: Stewart,AlanAmount purchased: 50,000 @ 213.70pValue: £106,850.00Icg Enterprise Trust (ICGT)Director name: Bruce,Alastair Amount purchased: 10,000 @ 879.25pValue: £87,925.00Essentra (ESNT)Director name: Forman,PaulAmount purchased: 20,000 @ 394.80pValue: £78,960.00Tesco (TSCO)Director name: Platt,Alison Amount purchased: 16,286 @ 214.50pValue: £34,933.47Tesco (TSCO)Director name: Allan,JohnAmount purchased: 12,000 @ 221.70pValue: £26,604.00Tesco (TSCO)Director name: Olsson ,Mikael Amount purchased: 10,000 @ 215.40pValue: £21,540.00Tesco (TSCO)Director name: Allan,JohnAmount purchased: 10,000 @ 211.70pValue: £21,170.00Rosslyn Data Technologies (RDT)Director name: Cox,HughAmount purchased: 150,000 @ 8.25pValue: £12,375.00Bluejay Mining (JAY)Director name: McIllree ,Roderick Amount purchased: 100,000 @ 10.69pValue: £10,685.00Nostra Terra Oil & Gas Co (NTOG)Director name: Ainsworth,Kristian (Ewen)Amount purchased: 350,100 @ 2.91pValue: £10,187.91Premaitha Health (NIPT)Director name: Hextall,Barry KennethAmount purchased: 100,000 @ 10.00pValue: £10,000.00Bluejay Mining (JAY)Director name: Palmer,Garth Amount purchased: 74,941 @ 10.68pValue: £7,999.95Infrastrata (INFA)Director name: Wood,JohnAmount purchased: 1,348,427 @ 0.59pValue: £7,915.27Bluejay Mining (JAY)Director name: Waugh,PeterAmount purchased: 33,742 @ 10.34pValue: £3,488.92Capita (CPI)Director name: Lewis,Jonathan (Jon)Amount purchased: 125 @ 136.35pValue: £170.44Sainsbury (j) (SBRY)Director name: Rogers,JohnAmount purchased: 36 @ 321.62pValue: £115.78Jupiter Fund Management (JUP)Director name: Slendebroek,MaartenAmount purchased: 1 @ 390.75pValue: £3.91Top Director SellsKeystone Law Group (KEYS)Director name: Philips,Simon RobertAmount sold: 2,125,000 @ 375.00pValue: £7,968,750.00Old Mutual Limited Npv (di) (OMU)Director name: Johnson,IngridAmount sold: 679,826 @ 159.60pValue: £1,084,975.12Old Mutual Limited Npv (di) (OMU)Director name: Johnson,IngridAmount sold: 633,443 @ 163.43pValue: £1,035,210.59Ideagen (IDEA)Director name: Spenceley,Graeme Amount sold: 600,000 @ 152.00pValue: £911,999.99Hiscox Limited (di) (HSX)Director name: Hussain,Hamayou AkbarAmount sold: 40,255 @ 1,667.00pValue: £671,050.85Ideagen (IDEA)Director name: Kent,BarnabyAmount sold: 300,000 @ 152.00pValue: £455,999.99Ideagen (IDEA)Director name: Dorks,BenAmount sold: 300,000 @ 152.00pValue: £455,999.99Close Brothers Group (CBG)Director name: Prebensen,PrebenAmount sold: 26,071 @ 1,532.20pValue: £399,459.85Old Mutual Limited Npv (di) (OMU)Director name: Johnson,IngridAmount sold: 220,174 @ 159.05pValue: £350,193.36Close Brothers Group (CBG)Director name: Howell,JonathanAmount sold: 18,300 @ 1,532.20pValue: £280,392.59Close Brothers Group (CBG)Director name: Etherington,RebekahAmount sold: 11,853 @ 1,532.20pValue: £181,611.66Town Centre Securities (TOWN)Director name: Ziff,MichaelAmount sold: 50,000 @ 270.00pValue: £135,000.00Nostra Terra Oil & Gas Co (NTOG)Director name: Ainsworth,Kristian (Ewen)Amount sold: 350,100 @ 2.90pValue: £10,152.90Infrastrata (INFA)Director name: Beardmore,Matthew Amount sold: 1,775,289 @ 0.57pValue: £10,119.15