Sirius Petroleum is at its highest in 3½ years on news that directors have bought £300,000 of shares in the AIM-listed oil company.Mike Hirschfield, former group finance executive of Lupus Capital, snapped up 3.1m shares at 5p each, costing him £155,000.Fellow director Toby Hayward shelled out £145,000 for 2.9m shares at the same price.Between them, the pair now own almost 8% of the business; Hirschfield with 2.85% and Hayward 5.05%. The shares doubled to 5p at the end of August after London-based Capital Investment Office guaranteed Sirius at least $80m of debt funding by for its first marginal oil field project. "We now have a substantial funding line which will enable us to execute our first asset deal in line with our strategy to create shareholder value through the acquisition of proven marginal oil assets in Nigeria," said chairman Babatunde Agboola. Top Director BuysCoastal Energy Company (DI) (CEO) Director name: Mr Bernard de CombretAmount purchased: 158,716 @ 303.59p Value: £481,846Lifeline Scientific Inc. (Reg S) (LSI) Director name: Mr Eric SwendenAmount purchased: 300,000 @ 52.00p Value: £156,000Sirius Petroleum (SRSP) Director name: Mr Michael HirschfieldAmount purchased: 3,100,000 @ 5.00p Value: £155,000Sirius Petroleum (SRSP) Director name: Mr Toby HaywardAmount purchased: 2,900,000 @ 5.00p Value: £145,000Lifeline Scientific Inc. (Reg S) (LSI) Director name: Mr Andrew J M ClarkAmount purchased: 75,000 @ 52.00p Value: £39,000Lifeline Scientific Inc. (Reg S) (LSI) Director name: Mr John GarciaAmount purchased: 50,000 @ 52.00p Value: £26,000Lifeline Scientific Inc. (Reg S) (LSI) Director name: Mr David KravitzAmount purchased: 20,000 @ 52.00p Value: £10,400Top Director SellsConnaught (CNT) Director name: Mr Mark DaviesAmount sold: 1,604,706 @ 425.00p Value: £6,820,000Connaught (CNT) Director name: Mr Stephen HillAmount sold: 900,000 @ 425.00p Value: £3,825,000Experian Group (EXPN) Director name: Mr Don RobertAmount sold: 588,612 @ 535.20p Value: £3,150,251Experian Group (EXPN) Director name: Mr John PeaceAmount sold: 559,886 @ 535.20p Value: £2,996,510Jardine Matheson (Singapore) (JAR) Director name: Mr Henry KeswickAmount sold: 60,000 @ $29.96 Value: $1,797,780Experian Group (EXPN) Director name: Mr Chris CalleroAmount sold: 315,063 @ 535.20p Value: £1,686,217Pearson (PSON) Director name: Ms Marjorie ScardinoAmount sold: 127,576 @ 794.30p Value: £1,013,336Connaught (CNT) Director name: Mr David WellsAmount sold: 192,711 @ 425.00p Value: £819,022Experian Group (EXPN) Director name: Mr Paul BrooksAmount sold: 134,462 @ 535.20p Value: £719,641Pearson (PSON) Director name: Mr Will EthridgeAmount sold: 68,678 @ 794.30p Value: £545,509