(Sharecast News) - South32 director Ntombifuthi Mtoba acquired 15,481 ordinary shares in the London-listed mining and metals company on Monday.Mtoba, who joined South32 in 2015, purchased the shares at an average price of 210.34p each, for a total value of £32,563.South32 reported growth in earnings for the six months ended 31 December back in February, with its reported profit ahead 35% at $908m.Revenue was 9% higher at $3.81bn, while its profit after tax improved 17% to $635m.Basic earnings per share totalled 12.5 cents for the period, an increase of 19%, while the board confirmed a 19% uptick in ordinary dividends per share to 5.1 cents.Special dividends per share were down 43% year-on-year at 1.7 cents, however.As of 1620 BST, South32 shares had picked up 1.25% to 210.60p.Top Director BuysIMImobile (IMO)Director name: Dr Ntombifuthi (Futhi) MtobaAmount purchased: 15,481 @ 210.34pValue: £32,563 South32 Limited (DI) (S32)Director name: Dr Ntombifuthi (Futhi) MtobaAmount purchased: 15,481 @ 210.34pValue: £32,563 Begbies Traynor Group (BEG)Director name: Mr Richard RoeAmount purchased: 554,884 @ 63.13pValue: £350,298 IMImobile (IMO)Director name: Mr Richard RoeAmount purchased: 554,884 @ 63.13pValue: £350,298 Begbies Traynor Group (BEG)Director name: Mr Anthony SpencerAmount purchased: 554,884 @ 63.13pValue: £350,298 EnQuest (ENQ)Director name: Mr Anthony SpencerAmount purchased: 554,884 @ 63.13pValue: £350,298 K3 Capital Group (K3C)Director name: Mr Anthony John FordAmount purchased: 50,000 @ 140.00pValue: £70,000 EnQuest (ENQ)Director name: Mr Amjad BseisuAmount purchased: 274,317 @ 19.60pValue: £53,766 Goodwin Plc (GDWN)Director name: Mr Timothy J.W. GoodwinAmount purchased: 750 @ 2,935.00pValue: £22,012 Goodwin Plc (GDWN)Director name: Mr Matthew Stanley GoodwinAmount purchased: 681 @ 2,937.00pValue: £20,001 Top Director SellsIMImobile (IMO)Director name: Mr Shyam BhatAmount sold: 200,000 @ 310.00pValue: £620,000 IMImobile (IMO)Director name: Mr Michael David JefferiesAmount sold: 100,000 @ 310.00pValue: £310,000 Accesso Technology Group (ACSO)Director name: Mr Tom BurnetAmount sold: 23,040 @ 919.87pValue: £211,938 Accesso Technology Group (ACSO)Director name: Mr John AlderAmount sold: 19,500 @ 919.87pValue: £179,375 Hill & Smith Holdings (HILS)Director name: Mr Mark PeglerAmount sold: 4,215 @ 1,264.00pValue: £53,278 Nichols (NICL)Director name: Mr Tim CrostonAmount sold: 1,885 @ 1,610.00pValue: £30,348