Company: FEAV
Filing Date: 2025-08-25
Form Type: 424B5
Source: 0001888654-25-000019
Chunk: 1

Company: 5E Advanced Materials, Inc.
Filing Date: 2025-08-25
Form: 424B5
Chunk 1
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stock in this offering at the public offering price. Any shares of common stock to be purchased by Bluescape
and Ascend in this offering will not be subject to a lock-up agreement with the underwriter. Because
indications of interest are not a binding agreement or commitment to purchase, either Bluescape and Ascend
may determine to purchase more, less or no shares in this offering or the underwriter may determine to sell
more, less or no shares to Bluescape and Ascend. The aggregate market value of our outstanding common stock held by non-affiliates is approximately $24,932,055.20, which was calculated based on 4,794,626 shares of outstanding common stock that were held by non-affiliates as of August 20, 2025 and a price per share of $5.20, the closing price of our common stock on August 11, 2025. Pursuant to General Instruction I.B.6. of Form S-3, in no event will we sell securities pursuant to the registration statement of which this prospectus supplement forms a part with a value more than one-third of the aggregate market value of our common stock held by non-affiliates in any 12-month period, so long as the aggregate market value of our common stock held by non-affiliates is less than $75.0 million. During the prior 12-calendar-month period that ends on, and includes, the date of this prospectus supplement, we have not offered any securities pursuant to General Instruction I.B.6. of Form S-3.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The shares will be ready for delivery on or about August 25, 2025.

<div align='center'>_________________________

Konik Capital Partners

a division of T.R. Winston & Co.

The date of this prospectus supplement is August 21, 2025.</div>

TABLE OF CONTENTS

|                                                                 | Page |
| PROSPECTUS SUPPLEMENT                                           |      |
| ABOUT THIS PROSPECTUS SUPPLEMENT                                | S-ii |
| PROSPECTUS SUPPLEMENT SUMMARY                                   | S-1  |
| THE OFFERING                                                    | S-4  |
| RISK FACTORS                                                    | S-5  |
| SELECTED FINANCIAL DATA                                         | S