Company: FEAV
Filing Date: 2025-03-27
Form Type: 424B3
Source: 0001193125-25-065503
Chunk: 1

Company: 5E Advanced Materials, Inc.
Filing Date: 2025-03-27
Form: 424B3
Chunk 1
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 reporting company” under federal securities
laws and, as such, are subject to reduced public company reporting requirements.

Investing in our common stock involves a high degree of risk. See the section titled “ Risk Factors” beginning on page 10 of this prospectus and any similar section contained in any applicable prospectus supplement concerning factors you should consider before investing in our securities.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus is March 26, 2025.

TABLE OF CONTENTS

|                                                       |     | Page |    |
| ABOUT THIS PROSPECTUS                                 |     |      |  1 |
| TRADEMARKS AND TRADE NAMES                            |     |      |  2 |
| CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS  |     |      |  3 |
| CAUTIONARY NOTE REGARDING RESERVES                    |     |      |  4 |
| CAUTIONARY NOTE REGARDING EXPLORATION STAGE COMPANIES |     |      |  6 |
| CAUTIONARY NOTE REGARDING INDUSTRY AND MARKET DATA    |     |      |  6 |
| PROSPECTUS SUMMARY                                    |     |      |  7 |
| THE OFFERING                                          |     |      |  9 |
| RISK FACTORS                                          |     |      | 10 |
| SELECTED FINANCIAL DATA                               |     |      | 11 |
| USE OF PROCEEDS                                       |     |      | 12 |
| DESCRIPTION OF CAPITAL STOCK                          |     |      | 13 |
| SELLING STOCKHOLDERS                                  |     |      | 17 |
| PLAN OF DISTRIBUTION                                  |     |      | 19 |
| LEGAL MATTERS                                         |     |      | 23 |
| EXPERTS                                               |     |      | 23 |
| WHERE YOU CAN FIND MORE INFORMATION                   |     |      | 23 |
| INCORPORATION BY REFERENCE                            |     |      | 24 |

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement on Form S-3 that we filed with the Securities and
Exchange Commission (the “SEC”) using a “shelf” registration process. Under this shelf registration process, the Selling Stockholders may sell the Resale Shares