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High-Grade Drill Results Continue at North American Lithium

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BELMONT, N.C., April 23, 2025--(BUSINESS WIRE)--Piedmont Lithium Inc. ("Piedmont," "the Company," "we," "our," or "us") (Nasdaq: PLL; ASX: PLL), a leading North American supplier of lithium products critical to the U.S. electric vehicle supply chain, announced the final results received from the North American Lithium ("NAL") 2024 drilling program. NAL is North America’s largest producing spodumene mine and is jointly owned by Piedmont (25%) and Sayona Mining Limited (75%) (ASX: SYA). The 2024 drilling program was launched in February 2024 and concluded in December 2024. The program focused on the strategic objectives of enhancing the existing Mineral Resource Estimate ("MRE") and identifying additional mineralization which may lead to an increase of the MRE.

Piedmont and Sayona will incorporate the latest drill results into an updated MRE, aiming to upgrade resource classification and increase overall resource tonnage. These results also reinforce the potential for expanding production at NAL. At the same time, they support improved mine planning to maximize project value and efficient resource development.

"The positive drilling outcomes support our plans for a potential brownfield expansion at NAL, aiming to increase production capacity to meet the growing global demand for lithium with resources produced in North America," said Keith Phillips, President and CEO of Piedmont Lithium. "These developments reinforce our commitment to advancing NAL as a cornerstone asset in our portfolio and contribute to our vision of becoming a leading supplier of lithium products critical to the energy transition."

Cautionary Note to U.S. Investors

Piedmont’s public disclosures are governed by the U.S. Exchange Act of 1934, including Regulation S-K 1300 thereunder, whereas Sayona discloses estimates of "measured," "indicated," and "inferred" mineral resources as such terms are used in the JORC Code and Canada’s National Instrument 43-101. Although S-K 1300, the JORC Code, and NI 43-101 have similar goals in terms of conveying an appropriate level of confidence in the disclosures being reported, they at times embody different approaches or definitions. Consequently, investors are cautioned that public disclosures by Sayona prepared in accordance with the JORC Code or NI 43-101 may not be comparable to similar information made public by companies, including Piedmont, subject to S-K 1300 and the other reporting and disclosure requirements under the U.S. federal securities laws and the rules and regulations thereunder.