Iain Conn, a non-executive director at global power systems company Rolls Royce has topped up his stake in the firm.The director, who joined the board in 2005, bought 325 shares at 792.5p each, in a purchase which follows a month of lucrative contract wins for the firm.In December the company won a €250m contract to supply safety instrumentation and control systems for the French nuclear reactor modernisation programme. Earlier in the month the firm secured a $350m contract from Hawaiian Airlines to deliver Trent 700 engines to power five Airbus A330 aircraft, an announcement which came just days after the firm won new contracts worth up to $650m from deep water driller Petrobras. On January 2, the company suffered a downgrade by UBS to sell from neutral, while its target price was cut from 610p to 600p. Top Director BuysPacific Alliance Asia Opportunity Fund Ltd. (PAX) Director name: Mr Christopher M GradelAmount purchased: 100,000 @ $1.14 Value: $114,000Wolseley (WOS) Director name: Ms Tessa BamfordAmount purchased: 900 @ 2,109.58p Value: £18,986Top Director SellsNorthern 2 VCT (NTV) Director name: Mr Alistair M ConnAmount sold: 139,217 @ 74.20p Value: £103,299Northern 2 VCT (NTV) Director name: Mr Frank L G NealeAmount sold: 43,238 @ 74.20p Value: £32,083Northern 2 VCT (NTV) Director name: Mr Christopher FletcherAmount sold: 17,524 @ 74.20p Value: £13,003NR