Glencore's chief executive Ivan Glasenberg continues building his stake in the commodity trading giant, this time spending £4.5m on shares.He took 1.01m shares at 446.22p a time. On Friday, Glencore said that Glasenberg had told the company that he will seek to buy shares up to the value of about $54m ahead of today, when a close period begins, meaning directors cannot buy shares. The purchase announced today was made yesterday.He has already bought 4.5m shares this week. Top Director BuysGlencore International (GLEN) Director name: Mr Ivan GlasenbergAmount purchased: 1,010,000 @ 446.22p Value: £4,506,822Breedon Aggregates Ltd. (BREE) Director name: Ms Sally Ann (Susie) FarnonAmount purchased: 200,000 @ 18.50p Value: £37,000MS International (MSI) Director name: Mr Michael J BellAmount purchased: 10,000 @ 242.50p Value: £24,250Silverdell (SID) Director name: Mr Sean NutleyAmount purchased: 100,000 @ 10.00p Value: £10,000Top Director SellsAegis Group (AGS) Director name: Mr Jerry BuhlmannAmount sold: 12,897 @ 126.40p Value: £16,302