Company: FEAV
Filing Date: 2025-03-27
Form Type: 424B3
Source: 0001193125-25-065503
Chunk: 21

Company: 5E Advanced Materials, Inc.
Filing Date: 2025-03-27
Form: 424B3
Chunk 21
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, and as a result may be deemed to share beneficial ownership of the securities held of record by Meridian. 
 Ascend Financial Holdings Limited (“Ascend Financial”) is the sole shareholder of Ascend Capital Advisors (S) Pte. Ltd., which is the sole partner of Ascend Global. As a result, each of the foregoing entities may be deemed to have                                                                                                                                                                                                                   
 beneficial ownership of the securities held by Ascend Global. By virtue of his control of Ascend Financial, Mr. Halim Susanto may also be deemed to share beneficial ownership of the securities beneficially owned by Ascend Global under                                                                                                                                                                                                               
 Section 13(d) of the Exchange Act and the rules promulgated by the SEC thereunder. Mr. Susanto disclaims beneficial ownership of the securities beneficially owned by Ascend Global.                                                                                                                                                                                                                                                                     |

| (4) | Includes up to 1,408,173 shares of common stock issuable upon exercise of the warrants. Meridian Investments 
 Corporation is the record holder of the securities.                                                          |

18

PLAN OF DISTRIBUTION We are registering the resale by the Selling Stockholders or their respective permitted transferees of the Resale Shares. We will not receive any of the proceeds from the sale of the securities by the Selling Stockholders. The Selling Stockholders may offer and sell, from time to time, the Resale Shares. The Selling Stockholders will act independently of us in making decisions with respect to the timing, manner and size of each sale. Such sales may be made on one or more exchanges or in the over-the-countermarket or otherwise, at prices and under terms then prevailing or at prices related to the then current market price or in negotiated transactions. The Selling Stockholders may sell their securities by one or more of, or a combination of, the following methods:

| • |     | on Nasdaq, in the                                                                                                  
 over-the-counter market or on any other national securities exchange on which our securities are listed or traded; |

| • |     | purchases by a broker-dealer as principal and resale by such broker-dealer for their own account pursuant to this 
 prospectus;                                                                                                       |

| • |     | through one or more underwritten transactions on a firm commitment or best efforts basis; |

| • |     | ordinary brokerage transactions and transactions in which the broker solicits purchasers; |

| • |     | block trades in which the broker-dealer so engaged will attempt to sell the shares as agent but may purchase and 
 resell a portion of