Quarterly Activities Report to 31 March 2024

Premier1 Lithium Limited (ASX:PLC) (“Premier1” or the “Company”) is working on a pipeline of promising lithium projects with Abbotts North being the premier exploration project hosting outcropping lithium bearing pegmatites.

HIGHLIGHTS

• First phase of drilling completed at Abbotts North Project (Buttamiah Prospect), WA, with 11 RC holes drilled totaling 1,623m
• Assay results from Abbotts North confirm continuation of LCT system and delineate targets to north and east
• Montague field work commenced identifying abundant newly mapped pegmatites
• Field programs planned at Montague, Yalgoo and Abbotts North for June Quarter
• Demerger transaction completed 25 January 2024
• Transition underway to new leadership team at PLC to align with new strategy

Safety and Environment

Premier1 conducted field exploration activity with no reportable ESG related incidents in the quarter.

Abbotts North Project

Premier1 successfully completed the first phase drilling program at Abbotts North, located 35km north of Meekatharra, Western Australia. The program was completed on time and under budget. A total of 11 RC holes for 1,623m were drilled to test the main outcropping pegmatites at the Buttamiah Prospect.

Nine of 11 drill holes intercepted pegmatites of on average 1 to 3m and locally up to 4m thickness hosted within an amphibolite unit. Occasionally, lepidolite has been identified and further analyses are planned to determine the presence of spodumene in the system. Assays were released subsequent to the end of the quarter. The results show elevated lithium across the stacked pegmatites of up to 0.41% Li2O, confirming the continuation of the LCT system down depth and along strike.

Additional studies of the outcropping pegmatites in the larger Buttamiah Prospect area including fractionation vectoring using K/Rb ratios suggest the core of the system to be located to the east of the previous drilling. In addition, the data indicate that LCT pegmatites occur within the granites to the north of the drill area. Further mapping and sampling of pegmatites in these areas as well as over the remaining tenement package has commenced. Focus is to delineate drill targets of higher grades and thicknesses that have the potential to form a significant lithium deposit within the existing LCT system.

Figure 1: Cross-section of intercepted pegmatites showing significant results >0.05% Li2O.

Premier1 also completed a soil geochemistry program at the Abbotts North project for a total of 600 samples. Factor analysis (FA) was employed with the purpose of identifying multielement signatures within the soil assay samples which may be indicative of Li mineralisation. The work was successful in identifying spatial and geochemical associations between lithium mineralisation and mapped geology.

Montague Project

Premier1 commenced pegmatite mapping and rock chip sampling at the Montague lithium project. The Company has identified abundant new pegmatites along a mafic-ultramafic and siliclastic sequence of the greenstone belt up to 1km west of the main granite contact to the east. Potassium-Rubidium (K/Rb) ratios defined at least two areas of interest that showed high fractionation of below 40 that indicate prospectivity for Lithium-Caesium-Tantalum (LCT) pegmatites.

The recently commenced first phase of field mapping and sampling has identified pegmatites in these two areas of interest. Occasionally, green mica has been identified and a first set of samples has been sent to the lab. Feldspar samples were taken of all newly mapped pegmatites to determine fractionation trends for further target vectoring and identification of potential drill targets for the second half of 2024.

The project covers the south-eastern portion of the Gum Creek Greenstone Belt which consists of early–mid Archean greenstone belts, intruded by late Archean granitoids and overlain by sporadic Proterozoic metasediments. Vast areas of Cainozoic sediments and transported regolith cover the region. Margins of the belt are typically dominated by contact-metamorphosed basalts and banded iron formations.

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