UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No. )

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Preliminary Proxy Statement

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Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐ Definitive Proxy Statement

 ☒ Definitive Additional Materials

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Soliciting Material under § 240.14a-12

Piedmont Lithium Inc.

(Name of Registrant as Specified in Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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Fee paid previously with preliminary materials.

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Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

Your Vote Counts!*Please check the meeting materials for any special requirements for meeting attendance.Smartphone users Point your camera here and vote without entering a control number For complete information and to vote, visit www.ProxyVote.com Control # V47744-P07327 PIEDMONT LITHIUM INC. 42 E CATAWBA STREET BELMONT, NORTH CAROLINA 28012UNITED STATES PIEDMONT LITHIUM INC. 2024 Annual Meeting Vote by June 12, 2024 11:59 PM ET You invested in PIEDMONT LITHIUM INC. and it’s time to vote!You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy materials for the stockholder meeting to be held on June 13, 2024.Get informed before you vote.View the Notice, Proxy Statement and Annual Report on Form 10-K online OR you can receive a free paper or email copy of the material(s) by requesting prior to May 30, 2024. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy.Vote Virtually at the Meeting* June 13, 202411:00 AM ETVirtually at:www.virtualshareholdermeeting.com/PLL2024

Vote at www.ProxyVote.com Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Delivery Settings”.Voting ItemsBoardRecommendsV47745-P07327THIS IS NOT A VOTABLE BALLOTThis is an overview of the more complete proxy materials thatare available to you on the Internet. You may view the proxymaterials at www.ProxyVote.com or easily request a paper copy.We encourage you to access and review all of the importantinformation contained in the proxy materials before voting.Please follow the instructions on the reverse side to vote onthese important matters.1. Election of the three Class I director nominees, each to serve for a three-year term until the 2027 Annual Meeting ofStockholders.Nominees:1a. Mr. Keith Phillips For1b. Mr. Michael Bless For1c. Ms. Dawne Hickton For2. Ratification of the appointment of PricewaterhouseCoopers LLP as the Company’s independent registered publicaccounting firm for the year ending December 31, 2024. For3. Approval of, on a non-binding, advisory basis, the compensation of our named executive officers. For4. Approval of the grant of up to 169,903 stock options to Mr. Keith Phillips. For5. Approval of the grant of up to 64,362 restricted stock units to Mr. Keith Phillips. For6. Approval of the grant of up to 257,442 performance stock units to Mr. Keith Phillips. For7. Approval of the grant of up to 13,976 restricted stock units to Mr. Jeff Armstrong. For8. Approval of the grant of up to 7,724 restricted stock units to Ms. Christina Alvord. For9. Approval of the grant of up to 7,724 restricted stock units to Mr. Jorge Beristain. For10. Approval of the grant of up to 7,724 restricted stock units to Mr. Michael Bless. For11. Approval of the grant of up to 7,724 restricted stock units to Mr. Claude Demby. For12. Approval of the grant of up to 7,724 restricted stock units to Ms. Dawne Hickton. For NOTE: Such other business as may properly come before the meeting or any adjournment or postponement thereof.Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Delivery Settings”.