Ocado non-executive director Jorn Rausing has been on a big shopping spree, spending more than £17m on shares in the grocery deliverer.He took 16.6m at between about 97p and 118p a time and now has 62.7m, which is about 11.24% of the company.Rausing joined the board of Ocado when the investment group he is attached to, Apple Trust, made an initial investment in Ocado in 2003.He is a member of the Swedish Rausing family, which made a fortune by developing Tetra Pak milk cartons. He is head of mergers and acquisitions for Tetra Laval, the packaging company.Shares in Ocado fell sharply last week on news that its main rival in the grocery delivery market, the supermarket Tesco, is to launch a major price cutting offensive to tempt cash-strapped customers.Earlier this month, Ocado said it saw sales increase by almost one-fifth in the first two-thirds of its financial year, despite continuing capacity constraints at its Hatfield depot. Gross sales in the 36 weeks to August 7th hit £444.6m, up 19.5% from £372.2m in the equivalent period in 2010. Top Director BuysOcado Group (OCDO) Director name: Mr Jorn RausingAmount purchased: 600,000 @ 104.79p Value: £628,740Ocado Group (OCDO) Director name: Mr Jorn RausingAmount purchased: 600,000 @ 100.48p Value: £602,880Ocado Group (OCDO) Director name: Mr Jorn RausingAmount purchased: 260,677 @ 97.48p Value: £254,108Ocado Group (OCDO) Director name: Mr Jorn RausingAmount purchased: 200,000 @ 117.99p Value: £235,980Continental Coal Limited (DI) (COOL) Director name: Mr Jason P BrewerAmount purchased: 241,667 @ 15.24p Value: £36,830Atkins (WS) (ATK) Director name: Dr Uwe KruegerAmount purchased: 10,000 @ 502.83p Value: £50,283Progressive Digital Media Group (PRO) Director name: Mr Mark Meek Amount purchased: 258,000 @ 15.50p Value: £39,990Bankers Petroleum Ltd. (BNK) Director name: Mr Phil KnollAmount purchased: 9,000 @ 252.73p Value: £22,746Progressive Digital Media Group (PRO) Director name: Mr Stephen BradleyAmount purchased: 172,000 @ 15.50p Value: £26,660Bankers Petroleum Ltd. (BNK) Director name: Mr Phil KnollAmount purchased: 4,900 @ 275.64p Value: £13,506