The chief executive of Pennon's Viridor bought some shares following upbeat full-year results.Ian McAulay, who has been on the board since 2013, purchased 9,045 shares for an individual price of 853.77p, spending a total of £0.77m in the transaction.Viridor is Pennon's renewable energy, recycling and waste management subsidiary.Its full-year earnings before interest, taxes, depreciation, and amortization were up 5.4% to £80.4m, which was in line with expectations, despite "current market conditions in recycling", the company said in May.McAulay said at the time: "I'm delighted to say that Viridor has now passed a strategic point of inflexion for the business."Viridor is well-positioned in its other businesses given regulatory drivers for recycling from the EU and UK Government, significant cash being generated in landfill energy."Top Director BuysPennon Group (PNN) Director name: Mr Ian McAulay Amount purchased: 9,045 @ 853.77p Value: £77,223Anglo Pacific Group (APF) Director name: Mr Julian TregerAmount purchased: 50,000 @ 95.00p Value: £47,500Electra Private Equity (ELTA) Director name: Mr Roger YatesAmount purchased: 1,000 @ 3,235.00p Value: £32,350Berendsen (BRSN) Director name: Mr Maarit Aarni-SirviöAmount purchased: 1,400 @ 1,024.50p Value: £14,343Top Director SellsSABMiller (SAB) Director name: Mr Alan ClarkAmount sold: 50,838 @ 3,574.00p Value: £1,816,950Whitbread (WTB) Director name: Mr Christopher C B RogersAmount sold: 22,913 @ 5,186.49p Value: £1,188,380Euromoney Institutional Investor (ERM) Director name: Mr Peter Richard EnsorAmount sold: 30,000 @ 1,190.00p Value: £357,000Whitbread (WTB) Director name: Mr Christopher C B RogersAmount sold: 357 @ 5,205.90p Value: £18,585