3.1 3.1 5.0 0.16 5.0 0.16 6.1 0.55 AR14 English for Web

AdARo ENERgy 2014 ANNuAl REPoRT sTRENGThENiNG ThE cORE fOR busiNEss susTAiNAbiliTY www.AdARo.CoM 73 Coal quality estimated as at December 31, 2013 Calculated changes to the quality of coal resources 2014 vs. 2013 Ash Volatile matter Total sulphur Ash Volatile matter Total sulphur 4.7 39.2 0.98 - - - 4.2 28.5 0.55 - - - No quality quoted No quality quoted 3.6 18.7 0.72 - - - 3.4 18.8 0.56 - - - 4.5 17.4 0.8 - - - 4.5 27.7 0.49 - - - 1 PT Adaro Indonesia’s coal quality samples have been analysed to ASTM standards. 2 Balangan Coal is an informal collective name for the separate IuPs PT Semesta Centramas, PT Paramitha Cipta Sarana and PT laskar Semesta Alam. Coal quality samples from each have been analysed to ASTM standards. 3 PT Mustika Indah Permai’s coal quality samples have been analysed to ISo standards. Elevated levels of sodium in ash averaging 3 were noted in the 2014 JoRC coal reserves 4 Based on BHP Billiton’s 2014 Annual Report with the permission of BHP Billiton. 5 Considered an underground mining resource. Notes Reported according to JORC Code 2012 Edition As at Dec. 31, 2013 Calculated changes to the quality of coal resources 2014 vs. 2013 Inherent moisture Ash Volatile matter Total sulphur Caloriic value Kcalkg Inherent moisture Ash Volatile matter Total sulphur Calorific value Kcalkg 19.0 2.4 40.4 0.14 5,453 0.2

0.3 -0.2

- -35 20.2 3.7 37.8 0.25 5,340 -0.3 -0.3 0.3 0.01 58 18.9 3.5 38.3 0.25 5,439 - - - - 23.0 4.0 38.4 0.30 5,004 -0.4 0.6 -0.1 0.09 -9 18.8 4.4 41.6 0.33 5,262 - - - -

20.2 3.1

39.7 0.21

5,306 -

0.3 -0.1

0.02 -21

24.3 2.5 38.1 0.09 4,906 1.3 -0.1 -0.9 -0.01 -68 17.4 2.1 40.9 0.07 5,353 6.0 1.8 -3.3 0.01 -586 22.6 2.0 39.2 0.09 5,058 -0.4 -0.1 - - 36

20.3 3.1

39.7 0.21

5,297 0.1

0.3 -0.2

0.02 -31

14.3 5.9 41.4 0.17 5,328 - - - - - 14 4.6 41.9 0.15 5,474 - - - - - 13.5 5.3 41.9 0.15 5,488 - - - - - 13.4 5.6 41.9 0.16 5,436 - - - - - 14.2 4.6 41.8 0.16 5,418 - - - - - 13.5 4.6 42.9 0.17 5,517 - - - - - 13.6 4.2 44.4 0.16 5,441 - - - - -

13.6 5.0

42.1 0.16

5,457 - - - - -

13.6 5.0

42.1 0.16

5,457 - - - - -

21.3 6.1

37.3 0.55

5,186 - - - - - No resources estimated in 2013 No resources estimated in 201314

21.3 6.1

37.3 0.55

5,186 - - - - - 20.3 3.2 39.6 0.22 5,305 0.1

0.3 -0.2

0.02 -43

13.6 5.0

42.1 0.16

5,457 - - - - - 74 OuR busiNEss REviEw Of miNiNG sERvicEs Adaro Coal Reserves Quality gross As Received Basis Operating Company Locality Calculated as at Dec. 31, 2014 Total moisture Ash Volatile matter Total sulphur Caloriic value Kcalkg PT Adaro Indonesia 1 Tutupan 26.8 1.76 36.7 0.11 5,020 North Paringin 26.3 2.38 35.3 0.21 5,056 South Paringin No reserves estimated in 2014 wara I 39.1 2.6 30.5 0.21 4,003 wara II No reserves estimated in 2014 Total Adaro Indonesia 31.2

2.1 34.4