PLL Q1 2025 Earnings Presentation

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:PLL ARBN 647 286 360 :PLL EARNINGS PRESENTATION FIRST QUARTER 2025 May 7, 2025

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: PLL : PLL DISCLAIMERS Forward Looking Statements This presentation contains forward-looking statements within the meaning o f or as described in securities legislation in the United States and Aust ralia, including statements regarding exploration, de velopment, construction and prod uction activities of Sayona Mining, Atlantic Lithium and Piedmon tL i t h i u m ; current plans for Piedmont’s mineral and chemical processing projects; Piedmont’s potential acquisition of an ownership interest in Ewoyaa; and strategy. Such forward-looking statements involve substantial and known and unknow n risks, uncertainties and other risk factors, many of which are beyond our control, and which may cause actual timing of events, results, performan ce or achievements expressed or implied by the forward-looking statements. Such risk factors include, among others: (i) that Piedmont, Sayona Mining or Atlantic Lithium may be unable to commercially extract mineral deposits, (ii) tha tP i e d m o n t ’ s , Sayona Mining’s or Atlantic Lithium’s properties may not contain expected reserves, (iii) risks and hazards inherent in the mining business (includ ing risks inherent in exploring, developing, constructing and operating mining pro jects, environmental hazards, industrial accidents, weather or geologi cally related conditions), (iv) uncertainty about Piedmont’s ability to obtain require d capital to execute its business plan, (v) Piedmont’s ability to hire and r etain required personnel, (vi) changes in the market prices of li thium and lithium products, (vii) changes in techno logy or the development of substitute products, (viii) the uncertainties inherent in exploratory, developm ental and production activities, including risk s relating to permitting, zoning and regulatory d elays related to Piedmont’s projects as well as the projects of our partners in Quebec and Gha na, (ix) uncertainties inherent in the estimation of lithium resources, ( x) risks related to competition, (xi) risks related to the information, data and pro jections related to Sayona Mining or Atlantic Lithium, (xii) occurrences and outcomes of claims, litigation and regulatory actions, investigations and proceedin gs, (xiii) risks regarding our ability to achieve profitability, enter in to and deliver product under supply agreements on favorable terms, our ability to obtain sufficien t financing to develop and construct our projects, our ability to comply w ith governmental regulations and our ability to obtain necessary permits, (xiv ) risks related to the completion of ou rp r o p o s e dm e r g e rw i t hS a y o n aM i n i nga n d related capital raises, and (xv) other uncertainties and risk factors set o u ti nf i l i n g sm a d ef r o mt i m et ot i m ew i t ht h eU . S .S e c u r i t i e sa n dE x c h a n g eC ommission (“SEC”) and the Australian Securities Exchange, including Piedmont’s mos t recent filings with the SEC. The forward-looking statements, projectio ns and estimates are given only as of the date of this presentation and actual event s, results, performance and achievements could vary significantly from t he forward- looking statements, projections and estimates presented in this presenta tion. Readers are cautioned not to put undue reliance on forward-looking s tatements. Piedmont disclaims any intent or obligation to update publicly such forwar d-looking statements, projections and estimates, whether as a result of n ew information, future events or otherwise. Additi onally, Piedmont, except as required by applicab le law, undertakes no obligation to comment on anal yses, expectations or statements made by third parties in respect of Piedmont, its financial or operating results or its securities. Non-GAAP Measures Non-GAAP financial metrics such as “Adjusted Net Loss,” “Adjusted Diluted Earnings Per Share,” “EBITDA,” and “Adjusted EBITDA” are used throughout the presentation to provide additional informatio n on business performance. The non-GAAP financia l measures presented do not have any standard mea ning prescribed by GAAP and may differ from similarly-titles measures used by oth er companies. However, we present these measures in this press release be cause we believe these non-GAAP financial measures provide useful means of evaluat ing and understanding how our management evaluates our financial condi tion and results of operations. A reconciliation of Non-GAAP metrics to statutory financial metrics is provided in Non-GAAP Measures section. Throughout this presentation, amounts may not sum due to rounding.2

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: PLL : PLL 3 Q1’25 EARNINGS SNAPSHOT KEITH PHILLIPS President & Chief Executive Officer MICHAEL WHITE Executive Vice President & Chief Financial Officer  Heightened volatility driven by shifts in macroeconomic outlook and geopolitics  27kt shipped to customers; in line with guidance  Reduced quarterly production at NAL  Weather related shutdowns lead to decline in mill utilization  Actions taken to mitigate future impacts and improve reliability  Proposed merger with Sayona Mining  Advancing merger towards shareholder votes  Integration planning underway Continued discipline in a challenging environment

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: PLL : PLL NAL PRODUCTION 4  43,261 dmt concentrate produced in Q1’25  Operation remains on track to produce 190,000 – 210,000 dmt for July 2024 - June 2025 period  80% mill utilization; operation challenged by weather with actions taken to mitigate future impact  69% global lithium recovery; operational improvements drive record recoveries  Received final drill results from 2024 drill program; mineral resource update expected in mid-2025 NAL Concentrate Production NAL Global Recovery and Mill Utilization 4 Source: Sayona Mining March 2025 Quarterly Activities Report, filed with the ASX April 29, 2025 Weather posed short-term challenges; mitigation measures in place to improve resilience 43% 57% 58% 62% 67% 68% 67% 68% 69%51% 71% 72% 75% 73% 83% 91% 90% 80% 25% 40% 55% 70% 85% 100% Q1'23 Q2'23 Q3'23 Q4'23 Q1'2 4 Q2'24 Q3'24 Q4'24 Q1'25 Global Recovery (%) Mill Utilization (%) 3,510 29,610 31,486 34,237 40,439 49,660 52,141 50,922 43,261 A$1,231 A$1,397 A$1,536 A$1,506 A$1,335 A$1,280 A$1,374 A$0 A$400 A$800 A$1,200 A$1,600 - 20,000 40,000 60,000 80,000 Q1'23 Q2'23 Q3'23 Q4'23 Q1'2 4 Q2'24 Q3'24 Q4'24 Q1'25 Concentrate Production (dmt) Unit Operating Costs (A$/dmt sold)

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: PLL : PLL DEMAND OUTLOOK 5 Lithium Demand (kt LCE) Source: Benchmark Mineral Intelligence Q1 2025 Lithium Forecast Stationary Storage Lithium Demand (kt LCE) Source: Estimates from Benchmark Mineral Intelligence, Canaccord, JP Morgan, Macquarie and TD Cowen. Demand remains strong 1,156 1,899 2,687 0 500 1,000 1,500 2,000 2,500 3,000 2024 2027 2030 199 352 483 0 125 250 375 500 625 750 2024 2027 2030 Average Minimum Estimate Maximum Estimate +132% +143%

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: PLL : PLL RENEWED CALLS FOR ENERGY SECURITY 6  Inadequate domestic energy infrastructure leads to reliance on foreign nations and a “National Energy Emergency”  Supply chain security concerns and geopolitical risks drive the urgency to localize production  American producers positioned to benefit from pro-domestic development and sourcing policies:  45X tax credits  Advanced Technology Vehicle Manufacturing (ATVM) Loans  Tariffs on critical minerals and batteries  Defense Production Act Title III  Executive Orders focused on permitting, financial support and strategic investments 6 Source: Benchmark Mineral Intelligence Q1 2025 Forecast North America will be dependent on lithium imports North American Lithium Supply and Demand (kt LCE) 162 253 430 19 50 335 88% 80% 22% 0 50 100 150 200 250 300 350 400 450 500 2024 2027 2030 North American Battery Demand North American Domestic Chemical Production Required Imports 203020272024

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MICHAEL WHITE EXECUTIVE VICE PRESIDENT & CHIEF FINANCIAL OFFICER FINANCIALS

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: PLL : PLL 8 $20.0 REVENUE $0.1 GROSS PROFIT ($0.71) GAAP DILUTED EPS 27.0 METRIC TONS SHIPPED (kt)1 CASH3 ADJUSTED DILUTED EPS 5 $65.4 ($0.46) $ in millions, except per share and per ton amounts Q1’25 FINANCIAL HIGHLIGHTS $741 REALIZED PRICE PER METRIC TON 2 REALIZED COST PER METRIC TON4 $736 (1) Refers to thousands of dry metric tons or dry metric ton. (2) Realized price per metric ton is the average estimated price, net of certain distribution and other fees, for ~5.4% Li 2O grade, which includes reference pricing data up to the period end and is subject to final adjustment. The final adjusted price may be higher or lower than the estimated average realized price based on future price movements. (3) Cash and cash equivalents at March 31, 2025. (4) Realized cost per metric ton is the average costs of sales including Piedmont’s offtake pricing agreement with Sayona Quebec Inc. for the purchase of spodumene concentrate at a market price subject to a floor of $500 per dmt and a ceiling of $900 per dmt, adjusted for product grade, freight, and insurance. (5) Non-GAAP measure. A reconciliation of Non-GAAP metrics to statutory financial metrics is provided in the Non-GAAP Measures s ection.

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: PLL : PLL REALIZED PRICES 9 Q1’25 SC6 Equivalent Realized Price Source: Company reports filed with the SEC or ASX. See appendix for detail. $823 $851 $844 $815 $791 $789 $740 $760 $780 $800 $820 $840 $860 Peer 1 Peer 2 Peer 3 Peer 4 Peer 5 Piedmont SC6 Equivalent Realized Prices $944 $1,031 $976 $909 $823 $700 $800 $900 $1,000 $1,100 $1,200 $1,300 Q1'24 Q2'24 Q3'24 Q4'24 Q1'25 Source: Piedmont Lithium reports filed with the SEC. The reported realized price is adjusted to a 6% Li2O equivalent price. SC6 spot price reflects the Fastmarkets spodumene concentrate 6% CIF China spot price from January 1, 2024 through March 31, 2025. SC6 Spot

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: PLL : PLL SOURCES AND USES OF CASH 10  Focus remains on minimizing cash burn during period of depressed lithium prices  $19 million operating cash outflow primarily related to timing of working capital and Q1 net loss  Successful deferral of capital expenditures with line of sight into reduced 2025 outlook  Minimal contributions to joint venture projects  Maintained liquidity through use of Credit Facility 10 ($19) ($1) ($1) ($1) $88 $65 12/31/24 Ending Cash Operating Cash Flow Capital Expenditures Investments in and Advances to Affiliates Financing Cash Flow 3/31/25 Ending Cash First Quarter 2025 (US$ mm)

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: PLL : PLL 11 2025 OUTLOOK (1) Estimated 2025 outlook figures based on year-to-date performance and management estimates. Current 2025 outlook is subject t o further changes due to market conditions. (2) Shipments outlook based on year-to-date performance and manage ment estimates. Piedmont’s 2025 shipment outlook is 113k – 130k dmt; quarterly variations due to shipping logistics and customer requirements may impact shipments made during the interim (outlook) periods.  Q1 production at NAL not expected to impact 2025 shipments  Reduced capital expenditure outlook, reflecting strategic focus on maintaining efficiency and supporting cost savings initiatives  Maintaining outlook for joint venture project spend Outlook (1)Actual Units FY’25Q2’25Q1’25FY’24 113 – 1308 – 2027117kt dmtShipments (2) 4 – 61 – 2111$ millionCapital expenditures 7 – 132 – 4126$ millionInvestments in and advances to affiliates

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MERGER WITH SAYONA MINING KEITH PHILLIPS PRESIDENT & CHIEF EXECUTIVE OFFICER

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: PLL : PLL PIEDMONT PROJECT PORTFOLIO 1313 NAL (3) NAL (3) NAL(2) Carolina NAL(2) NAL(2) MERGER STATUS Advancing toward shareholder votes Complete  Deal announcement and concurrent capital raises  Corporate name selection  Board nominees named  Amended merger agreement to include proposed reverse stock split, updated exchange ratio and new corporate name Corporate Ongoing and Upcoming  Conditional Placement to Resource Capital Fund VIII  Integration planning  Corporate rebranding launch  Sayona reverse stock split Corporate Regulatory  Investment Canada Act (ICA)  Hart-Scott-Rodino (HSR)  Committee on Foreign Investment in the United States (CFIUS) Regulatory  Sayona F-4 registration with the Securities and Exchange Commission  Piedmont and Sayona shareholder meetings

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: PLL : PLL 1414 NAL (3) NAL (3) NAL(2) Carolina NAL(2) NAL(2) TRANSACTION EXCHANGE RATIO SharesPiedmont Common Stock (Nasdaq) 100 Number of Piedmont Shares Held Prior to Transaction 527 Transaction Exchange Ratio Converting Piedmont Shares to Elevra Shares = 100 x 52752,700 Number of Elevra Shares Held Post Transaction 1-for-150Reverse Stock Split Ratio = 52,700 / 150351.3 Number of Elevra Shares Held Post Reverse Split 1-for-10ADS Issuance Ratio = 351.3 / 1035.13 Number of Elevra ADSs Held Post ADS Issuance SharesPiedmont Chess Depositary Interests (ASX) 10,000 Number of Piedmont CDIs Held Prior to Transaction 5.27 Transaction Exchange Ratio Converting Piedmont CDIs to Elevra Shares = 10,000 x 5.2752,700 Number of Elevra Shares Held Post Transaction 1-for-150Reverse Stock Split Ratio = 52,700 / 150351.3 Number of Elevra Shares Held Post Reverse Split Exchange Ratio You Own Piedmont Common Stock (Nasdaq : PLL) Piedmont Chess Depositary Interest (ASX : PLL) You Receive Elevra American Depositary Shares (Nasdaq : ELVR) Elevra Ordinary Shares (ASX : ELV) What is an American Depositary Share? An American Depositary Share, or ADS, represents a specified number of securities of a non-U.S. company deposited with a custodian bank.

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: PLL : PLL MERGER WITH SAYONA MINING 15 Enhanced Market Position Strategic Growth Opportunities  Solidifies status as North America’s largest operating lithium producer  Improves ability to integrate into strategic supply chains and serve the growing demand for lithium  Consolidated NAL ownership enables brownfield expansion not available on a standalone basis  Provides access to additional growth projects, including the high grade Moblan Lithium Project  Capital raises and realization of synergies create a stronger financial profile  Enables faster execution of strategic plans and capital investment decisions  Reduced complexity with increased operational credentials and business critical technical knowledge  Equal representation of Piedmont and Sayona shareholders protects shareholder interests  Maintained listing on the ASX and Nasdaq to retain liquidity and attract a diverse investor base Benefits to shareholders Financial Strength and Stability Unified Corporate Structure

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Q&A

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APPENDIX

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: PLL : PLL UPCOMING INVESTOR RELATIONS EVENTS 18 John Koslow Manager, FP&A & Investor Relations jkoslow@piedmontlithium.com Direct: +1 980 701 9928 Mobile: +1 516 320 0842 RESEARCH COVERAGE UPCOMING INVESTOR RELATIONS EVENTS Los Angeles, CA25th Annual B. Riley Institutional Investor ConferenceMay 20 - 22 MAY Henderson, NVCanaccord 4th Annual Global Metals & Mining ConferenceMay 20 - 22 Boston, MAKeyBanc Industrials & Basic Materials ConferenceMay 27 - 29 New York, NYJP Morgan 2025 Energy, Power, Renewables & Mining ConferenceJun 24 - 25JUN

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: PLL : PLL SUPPORTING DATA 19 SourceSC6 Equivalent Price ($/t)Grade (% Li2O)Reported Price ($/t)CompanyPeer Piedmont Lithium Q1 2025 Report filed with the SEC on May 7, 2025$8235.4%$741Piedmont Lithium Pilbara Minerals March 2025 Quarterly Activities Report filed with the ASX on April 17, 2025$8515.3%$747Pilbara Minerals(1)Peer 1 Mineral Resources Quarterly Activities Report - Q3 FY25 filed with the ASX on April 29, 2025$8446.0%$844Mineral Resources(2)Peer 2 Liontown Resources March 2025 Quarter Presentation filed with the ASX on April 24, 2025$8156.0%$815Liontown Resources(3)Peer 3 IGO March 2025 Quarterly Activities Report filed with the ASX on April 30, 2025$7916.0%$791IGO(4)Peer 4 Sayona Mining Quarterly Activities Report - March 2025 filed with the ASX on April 29, 2025$7895.4%$710Sayona Mining(5)Peer 5 (1) Average realized price for ~5.3% and 6.0% Li 2O material on a CIF China basis. (2) Weighted average price reported across Mt Marion and Wodgina for 6.0% Li 2O material. No Incoterms provided. (3) Average realized price includin g provisional pricing for 6.0% Li2O material on a CIF basis. (4) Average realized price reported for chemical and technical grade spodumene sales from Greenbushes on an FOB Australia basis. No grade listed but assumed at 6.0% Li2O. (5) Average realized price on an FOB Port of Quebec basis. No grade listed but assumed at 5.4% Li 2O based on disclosure that all tons were sold to Piedmont Lithium. Realized Prices

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NON-GAAP RECONCILIATIONS

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: PLL : PLL DEFINITIONS OF NON-GAAP MEASURES 21 DESCRIPTIONNON-GAAP MEASURES Net loss plus or minus the gain or loss from sale of equity method investments, gain or loss on sale of assets, gain or loss from equity securities, gain or loss from foreign currency exchange, restructuring and impairment charges including severance and severance related costs and exit costs, and certain other adjustments we believe are not reflective of our ongoing operations and performance. These items include acquisition costs and other fees, and shelf registration costs. Adjusted Net Loss Diluted EPS before gain or loss on sale of equity method investments, gain or loss on sale of assets, gain or loss from equity securities, gain or loss from foreign currency exchange, restructuring and impairment charges including severance and severance related costs and exit costs, and certain other costs we believe are not reflective of our ongoing operations and performance. Any references to adjusted EPS are to adjusted diluted EPS. Adjusted Diluted EPS Net income (loss) before interest expenses, income tax expense, and depreciation.EBITDA EBITDA plus or minus the gain or loss on sale of equity method investments, gain or loss on the sale of assets, gain or loss from equity securities, gain or loss from foreign currency exchange, restructuring and impairment charges including severance and severance related costs, and certain other adjustments we believe are not reflective of our ongoing operations and performance. Adjusted EBITDA

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: PLL : PLL ADJUSTED NET LOSS 22 Net loss attributable to Piedmont stockholders is reconciled to adjusted net loss (1) Loss on sale of equity method investment s includes a loss on the sale of shares in Sayona Mining of $17,215, partially offset by a gain on the sale of shares in Atlantic Lithium of $3,143 and a gain on dilution related to the issuance of additional shares of Atlantic Lithium of $186 for the three months ended March 31, 2024. (2) Loss (gain) on equity securities represents realized and unr ealized gains on our equity security holdings in Atlantic Lithium and Ricca Resources. (3) Loss from foreign currency exchange primar ily relates to currency fluctuations in our foreign bank accounts denominated in Canadian dollars and Australian dollars and marketable securities denominated in Australian dollars. (4) Restructuring charges relates to severance and reorganization related costs and exit costs related to our 2024 Cost Savings Plan. (5) Other costs include legal and transactional costs related to certain strategic transactions and shelf registration costs. (6) No income tax impacts have been given to any items that were recorded in jurisdictions will full valuation allowances. Three Months Ended March 31, 2024December 31, 2024March 31, 2025(In thousands, except per share amounts) Diluted EPSDiluted EPSDiluted EPS (1.22)$(23,611)$(0.55)$(11,131)$(0.71)$(15,631)$Net loss 0.7213,886–)–)–)–)Loss on sale of equity method investments(1) –)–)–)100–)80Loss on sale of assets (0.07)(1,384)(0.09)(1,791)0.173,640Loss (gain) on equity securities(2) 0.011310.035960.01195Loss from foreign currency exchange(3) 0.091,7800.163,1940.01283Restructuring charges(4) 0.024310.275,5180.061,369Other costs(5) (0.16)(3,093)–)(37)–)–)Tax effect of adjustments(6) (0.61)$(11,860)$(0.17)$(3,551)$(0.46)$(10,064)$Adjusted net loss

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: PLL : PLL EBITDA AND ADJUSTED EBITDA 23 Net loss attributable to Piedmont stockholders is reconciled to EBITDA and adjusted EBITDA (1) Loss on sale of equity method investment s includes a loss on the sale of shares in Sayona Mining of $17,215, partially offset by a gain on the sale of shares in Atlantic Lithium of $3,143 and a gain on dilution related to the issuance of additional shares of Atlantic Lithium of $186 for the three months ended March 31, 2024. (2) Loss (gain) on equity securities represents realized and unr ealized gains on our equity security holdings in Atlantic Lithium and Ricca Resources. (3) Loss from foreign currency exchange primar ily relates to currency fluctuations in our foreign bank accounts denominated in Canadian dollars and Australian dollars and marketable securities denominated in Australian dollars. (4) Restructuring charges relates to severance and reorganization related costs and exit costs related to our 2024 Cost Savings Plan. (5) Other costs include legal and transactional costs related to certain strategic transactions and shelf registration costs. Three Months Ended March 31, 2024December 31, 2024March 31, 2025(In thousands) (23,611)$(11,131)$(15,631)$Net loss (605)(189)(139)Interest income, net (3,093)(37)–)Income tax benefit 81)63)63)Depreciation and amortization (27,228)(11,294)(15,707)EBITDA 13,886–)–)Loss on sale of equity method investments(1) –)100)80)Loss on sale of assets (1,384)(1,791)3,640)Loss (gain) on equity securities(2) 131)596)195)Loss from foreign currency exchange(3) 1,780)3,194)283)Restructuring charges(4) 431)5,518)1,369)Other costs(5) (12,384)$(3,677)$(10,140)$Adjusted EBITDA

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Slides