Two members of the Executive Committee of ARM, the FTSE 100 chip designer, sold off a total of 150,000 shares, received as part of the firm's long term incentive plan, earlier this week.Tom Lantzsch, Executive Vice President of Corporate Development, sold 50,000 shares at 575p each and another 50,000 at a price of 573p per share, for a total of £574,000. His total holding now stands at 35,347 shares. Lance Howarth, Executive Vice President of Marketing, sold 1,663 at 575p per share and 48,337 at 573.88p per share for a total of around £286,959. He now holds a total holding of 35,000 shares. Earlier this year the firm offered a relatively positive outlook for the full year 2012 after beating forecasts in the fourth quarter and full-year, boosted by strong growth in licensing revenues. Fourth quarter sales totalled £137.8m, up from £113.9m the year before, as the group sold 2.2bn of its ARM technology-based chips, the highest-ever number of ARM-processor based shipments.The stock has gained over 10% on its stock, equivalent to 52.50p, in the past year, although it lost 12.50p, or 2%, in the past month. Top Director BuysLow & Bonar (LWB) Director name: Mr John SheldrickAmount purchased: 70,000 @ 64.00p Value: £44,800Petra Diamonds Ltd. (PDL) Director name: Mr Gordon HamiltonAmount purchased: 20,000 @ 168.50p Value: £33,700Mckay Securities (MCKS) Director name: Viscount LiffordAmount purchased: 10,000 @ 132.00p Value: £13,200Mecom Group (MEC) Director name: Mr Zillah Byng-MaddickAmount purchased: 6,170 @ 170.25p Value: £10,504Marston's (MARS) Director name: Lord Robin Hodgson of Astley AbbottsAmount purchased: 10,000 @ 101.44p Value: £10,144Top Director SellsSenior (SNR) Director name: Mr Mark RollinsAmount sold: 441,228 @ 190.24p Value: £839,392Senior (SNR) Director name: Mr Simon NichollsAmount sold: 244,807 @ 190.24p Value: £465,721Spirax-Sarco Engineering (SPX) Director name: Mr Mark E. VernonAmount sold: 5,730 @ 2,143.85p Value: £122,843Spirax-Sarco Engineering (SPX) Director name: Mr David J MeredithAmount sold: 5,500 @ 2,143.85p Value: £117,912