Investor Presentaiton

2022 Mineral Resources and Ore Reserves NORTHERN STAR RESOURCES LIMITED MEASURED Tonnes Grade Ounces (000's) (gpt) (000's) 169,495 1.1 6,058 INDICATED Tonnes Grade Ounces (000's) (gpt) (000's) 451,955 2.2 32,046 INFERRED Tonnes Grade Ounces (000's) (gpt) (000's) 243,289 2.3 18,288 TOTAL RESOURCES Tonnes Grade Ounces (000's) 864,738 (gpt) (000's) 2.0 56,392 MINERAL RESOURCES as at 31 March 2022 NST ATTRIBUTABLE INCLUSIVE OF RESERVE NORTHERN STAR TOTAL ORE RESERVES as at 31 March 2022 NST ATTRIBUTABLE INCLUSIVE OF RESERVE NORTHERN STAR TOTAL PROVED Tonnes Grade (000's) 146,799 (gpt) 0.9 Ounces (000's) Tonnes PROBABLE Grade TOTAL RESERVE (000's) (gpt) Ounces (000's) Tonnes Grade Ounces (000's) (gpt) (000's) 4,338 241,067 2.1 16,346 387,866 1.7 20,683 Mineral Resource and Ore Reserve Summary ■ As of 31 March 2022, the Group Mineral Resource is estimated as 865Mt @ 2.0g/t Au for 56.4Moz. ■ Mineral Resources for the Australian Operations were estimated at an assumed gold price of A$2,250/oz. Mineral Resources for the Pogo Operation were calculated using an assumed gold price of US$1,500/oz. ■ As of 31 March 2022, the Group Ore Reserve is estimated at 388Mt @ 1.7g/t Au for 20.7Moz. ■ Ore Reserves for the Australian Operations were estimated at an assumed gold price of A$1,750/oz. Reserves for the Pogo Operation were estimated at an assumed gold price of US$1,350/oz. ■ These figures represent JORC 2012 Mineral Resources and Ore Reserves for the combined assets owned by Northern Star. 1999 19

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