Resources and Reserves

NOTES:
1. Mineral Resources are 100% NST attributable; and inclusive of Ore Reserves.
2. Mineral Resources are reported at A$2,500oz Au for Australian assets and US$1,800/oz Au for USA assets.
3. Rounding may result in apparent summation differences between tonnes, grade and contained metal content.
4. Competent Person: Jabulani Machukera (other than Central Tanami Project JV)

NOTES:
1. Ore Reserves are 100% NST attributable; and reported at A$2,000oz Au for Australian assets and US$1,400/oz Au for USA assets.
2. Rounding may result in apparent summation differences between tonnes, grade and contained metal content.
3. Ounces are estimates of metal contained in the Ore Reserve and do not include allowances for processing losses.
4. Competent Person: Jeff Brown

Competent Persons Statements

The information in this announcement that relates to exploration results, data quality and geological interpretations for the Company’s Operations is based on information compiled by Daniel Howe, a Competent Person who is a Member of the Australasian Institute of Mining and Metallurgy and a full-time employee of Northern Star Resources Limited. Mr Howe has sufficient experience that is relevant to the styles of mineralisation and type of deposits under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the "Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves". Mr Howe consents to the inclusion in this announcement of the matters based on this information in the form and context in which it appears.

The information in this announcement that relates to Mineral Resource estimations for the Company’s Operations is based on information compiled by Jabulani Machukera, a Competent Person who is a Member of the Australasian Institute of Mining and Metallurgy and a full-time employee of Northern Star Resources Limited. Mr Machukera has sufficient experience that is relevant to the styles of mineralisation and type of deposits under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the "Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves". Mr Machukera consents to the inclusion in this announcement of the matters based on this information in the form and context in which it appears.

The information in this announcement that relates to Ore Reserve estimations for the Company’s Operations is based on information compiled by Jeff Brown, a Competent Person who is a Member of the Australasian Institute of Mining and Metallurgy and a full-time employee of Northern Star Resources Limited. Mr Brown has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the "Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves". Mr Brown consents to the inclusion in this announcement of the matters based on this information in the form and context in which it appears.

The information in this announcement that relates to the Central and Western Tanami Gold Projects is extracted from the Tanami Gold NL ASX announcement entitled “Mineral Resource Update” released on 24 November 2022 and is available to view on www.tanami.com.au.

The Company confirms that it is not aware of any further new information or data that materially affects the information included in the original market announcement entitled “Mineral Resource Update” released on 24 November 2022 and, in the case of estimates of Mineral Resources, that all material assumptions and technical parameters underpinning the estimates in the relevant market announcement continue to apply and have not materially changed. To the extent disclosed above, the Company confirms that the form and context in which the Competent Person’s findings are presented have not been materially modified from the original market announcement.