Resources and Reserves

Northern Star’s ongoing exploration investment continues to drive strong organic and inorganic growth across our portfolio, resulting in a significant increase in Mineral Resources to 88.9Moz and Ore Reserves to 28.4Moz over the 12 months to 31 March 2026.

Group Mineral Resources as at 31 March 2026

NOTES:
1. Mineral Resources are 100% NST attributable; and inclusive of Ore Reserves.
2. Mineral Resources are reported at A$3,700oz Au for Australian assets and US$2,600/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

 Group Ore Reserves as at 31 March 2026

NOTES:
1. Ore Reserves are 100% NST attributable; and reported at A$2,900oz Au for Australian assets and US$1,900/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

For further details, including a full breakdown of each project's Mineral Resources and Ore Reserves, see Northern Star's ASX release titled 'Resources and Reserves Update' dated 3 June 2026, also available at ASX Announcements.

Competent Persons Statements

The information in this announcement that relates to Mineral Resource estimations for Northern Star’s Operations (other than the Central Tanami Gold Project) is based on, and fairly represents, 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 Ltd. 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 his information in the form and context in which it appears.

The information in this announcement that relates to Ore Reserve estimations for Northern Star’s Operations is based on, and fairly represents, 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 Ltd. 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 his information in the form and context in which it appears.