Northern Petroleum on Monday announced that its Chief Executive Officer, Keith Bush, had the same day purchased 85,000 ordinary shares. Costing 31.18p each, Bush spent a total of £26,503 on the shares. The purchase marks his only holding in the group. Meanwhile, fellow board member, Stewart Gibson, who is one of the oil and gas group's Non-Executive Directors, spent £31,000 on 100,000 shares, which similarly marks his only stake in the group too. Gibson, former Chief Executive Officer of TSX-V listed Sterling Resources, joined the group in December. Top Director BuysDatatec Ltd. (DI) (DTC) Director name: Mr Jens MontananaAmount purchased: 25,000 @ 262.21p Value: £65,552Diageo (DGE) Director name: Mr Ivan MenezesAmount purchased: 34,000 @ 1,799.38p Value: £611,789Northern Petroleum (NOP) Director name: Mr Stewart Glen GibsonAmount purchased: 100,000 @ 31.00p Value: £31,000Northern Petroleum (NOP) Director name: Mr Keith Bush Amount purchased: 85,000 @ 31.18p Value: £26,503Rurelec (RUR) Director name: Mr Brian RowbothamAmount purchased: 100,000 @ 13.25p Value: £13,250Top Director SellsPorvair (PRV) Director name: Mr Ben StocksAmount sold: 200,000 @ 285.00p Value: £570,000Porvair (PRV) Director name: Mr Christopher TylerAmount sold: 85,000 @ 285.00p Value: £242,250Renew Holdings (RNWH) Director name: Mr Brian MayAmount sold: 57,140 @ 197.63p Value: £112,926Renew Holdings (RNWH) Director name: Mr John SamuelAmount sold: 57,140 @ 197.63p Value: £112,926NR