1H 2013 Earnings Presentation

Aggregate Market Capitalization (US$ bil) 350 300 250 200 Industry indicators continue to decline... Mining Performance SNL MEG* - Pipeline Activity Index- Pipeline Activity Index (PAI) I Mining Industry Market Cap $2,500 $2,000 $1,500 $1,000 $500 $0 150 Jan-13 SNL MEG Indexed Metals Price JFMAMJJASONDJFMAMJ JASOND JFMAMJ JASONDJFMAMJJASOND JFMAMJ JASONDJFMAMJ 2008 Feb-13 2009 2010 2011 Bloomberg Mining Index** - Price Performance- Mar-13 2012 L 2013 Apr-13 May-13 Jun-13 Jul-13 Source: SNL Metals Economics Group **Source: Bloomberg BOART LONGYEAR 160 130 100 70 40 10 SNL MEG Pipeline Activity Index and Indexed Metals Price Gold (zo/$) Copper ($/lb) Iron Ore ($/mt) Nickel (91/$) Key Commodity Trends Jan 2009 Dec 2012 Apr 2013 Jul 2013 Jan 2009 Dec 2012 Apr 2013 Jul 2013 500 1,000 1,500 2,000 1.0 2.0 3.0 4.0 Jan 2009 Dec 2012 Apr 2013 Jul 2013 Jan 2009 Dec 2012 Apr 2013 Jul 2013 50 50 100 150 200 2.0 4.0 6.0 8.0 Source: Bloomberg & BLY Analysis *Percentage change is from Dec 2012 to July 2013 30%* 15%* 14%* 24%* 1H 2013 Earnings Presentation 4

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