(ShareCast News) - BAE Systems's finance chief was forced to liquidate a substantial part of his holdings in the company he helps run, pursuant to a divorce settlement.Peter Lynas on Friday sold 182,288 shares at an individual price of 483,25p, followed by the excercise of an option over another 11,691 shares, all of which were disposed of at 484.32p each one.In total, Lynas cashed in £937,072.04- worth of shares.On 4 May, speaking at the company's annual shareholder meeting, chief executive Ian King said: "Whilst economic and geo-political conditions remain volatile, we have started the year with good momentum and the business is performing well. In 2016 and beyond, we are well placed to continue to generate attractive returns for shareholders."Analysts at RBC concurred, in a research note sent to clients on 16 June they said they saw UK aerospace and defence companies as the most exposed to a Brexit vote.Despite the resulting underperformance by their 'top-pick' BAE Systems, they believed it was a "good opportunity to invest".Shares in BAE Systems had fallen 5% year-to-date and the stock was trading on a 2017 price-to-earnings multiple of 11.4, versus an 8% rise during that same time-frame in shares of its US rivals, whose shares were trading on a 2017 P/E ratio of about 16.1."We think that the current valuation gap versus the US defense sector is likely to partially close post the Brexit vote and once the recovery in the US defense outlook becomes more apparent to BAE's UK investor base."Top Director BuysComputacenter (CCC)Director name: Lock,GregAmount purchased: 26,000 @ 780.50pValue: £202,930.00Eu Supply (EUSP)Director name: Beergrehn,Thomas BoAmount purchased: 1,400,000 @ 4.25pValue: £59,500.00Empiric Student Property (ESP)Director name: Hadaway,PaulAmount purchased: 43,515 @ 105.00pValue: £45,690.75Dunedin Enterprise Investment Trust (DNE)Director name: Finlayson,BrianAmount purchased: 10,000 @ 310.50pValue: £31,050.00Liontrust Asset Management (LIO)Director name: Yeandle ,George Amount purchased: 10,000 @ 284.00pValue: £28,400.00Invesco Income Growth Trust (IVI)Director name: Dampier,MarkAmount purchased: 9,887 @ 251.52pValue: £24,867.78Hogg Robinson Group (HRG)Director name: Williams,PaulAmount purchased: 25,000 @ 67.00pValue: £16,750.00Pendragon (PDG)Director name: Holden ,Tim Amount purchased: 40,000 @ 35.62pValue: £14,248.00Pendragon (PDG)Director name: Holden ,Tim Amount purchased: 40,000 @ 35.20pValue: £14,080.00Cobham (COB)Director name: Murphy ,Robert (Bob)Amount purchased: 7,500 @ 138.00pValue: £10,350.00Europa Oil & Gas (holdings) (EOG)Director name: Mackay ,Hugh Amount purchased: 250,327 @ 3.99pValue: £9,988.05Tex Holdings (TXH)Director name: Parker ,Christopher Amount purchased: 152,000 @ 1.04pValue: £1,580.80Kingfisher (KGF)Director name: Witts,KarenAmount purchased: 42 @ 352.00pValue: £147.84Jpmorgan Asian Inv Trust (JAI)Director name: Gould,RonaldAmount purchased: 57 @ 217.40pValue: £123.92Senior (SNR)Director name: Harding ,DerekAmount purchased: 41 @ 219.00pValue: £89.79Top Director SellsBae Systems (BA.)Director name: Lynas,PeterAmount sold: 182,288 @ 483.25pValue: £880,906.76Babcock International Group (BAB)Director name: Rogers,Peter LAmount sold: 72,208 @ 966.75pValue: £698,070.81Great Portland Estates (GPOR)Director name: Courtauld,TobyAmount sold: 73,995 @ 712.20pValue: £526,992.41Great Portland Estates (GPOR)Director name: Thompson,NeilAmount sold: 58,902 @ 712.20pValue: £419,500.06Great Portland Estates (GPOR)Director name: Sanderson,NickAmount sold: 47,547 @ 712.20pValue: £338,629.74London & Associated Properties (LAS)Director name: Heller,Michael AAmount sold: 300,000 @ 25.00pValue: £75,000.00 (HUR)Director name: Platt,NeilAmount sold: 418,341 @ 15.91pValue: £66,558.05 (HUR)Director name: Trice,RobertAmount sold: 418,341 @ 15.91pValue: £66,558.05Bae Systems (BA.)Director name: Lynas,PeterAmount sold: 11,691 @ 484.32pValue: £56,621.85Pendragon (PDG)Director name: Holden ,Tim Amount sold: 40,000 @ 35.52pValue: £14,208.00Pendragon (PDG)Director name: Holden ,Tim Amount sold: 40,000 @ 35.10pValue: £14,040.00