Company: FEAV
Filing Date: 2025-03-27
Form Type: 424B3
Source: 0001193125-25-065503
Chunk: 3

Company: 5E Advanced Materials, Inc.
Filing Date: 2025-03-27
Form: 424B3
Chunk 3
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 reference (or, in each case, any earlier date specified for such information, unless we indicate otherwise), regardless of
the time of delivery of such document or the time of any sale of a security. Our business, financial condition, results of operations and prospects may have changed since those dates.

This prospectus contains or incorporates by reference, and any applicable prospectus supplement or free writing prospectus may contain and
incorporate by reference, summaries of certain provisions contained in some of the documents described herein, but reference is made to the actual documents for complete information. All of the summaries are qualified in their entirety by the full
text of such documents. Copies of some of the documents referred to herein have been filed, will be filed or will be incorporated by reference as exhibits to the registration statement of which this prospectus is a part, and you may obtain copies of
those documents as described below under “Where You Can Find More Information” and “Incorporation by Reference.”

Notice to investors outside the United States: Neither we nor the Selling Stockholders are offering to sell or seeking offers to purchase
these securities in any jurisdiction where the offer or sale is not permitted. We and the Selling Stockholders have not taken any actions that would permit the possession or distribution of this prospectus in any jurisdiction where action for that
purpose is required, other than in the United States. Persons outside the United States who come into possession of this prospectus must inform themselves about, and observe any restrictions relating to, the offering and distribution of this
prospectus outside the United States.

1

This prospectus does not contain all of the information included in the registration
statement of which it forms a part. For further information, we refer you to the entire registration statement, including its exhibits. Statements contained in this prospectus about the provisions or contents of any contract, agreement or other
document are not necessarily complete. For each of these contracts, agreements or documents filed as an exhibit to the registration statement, we refer you to the actual exhibit for a more complete description of the matters involved.

When used in this prospectus and any prospectus supplement, unless otherwise specified or the context otherwise requires, the terms the
“Company,” “we,” “our,” and “us” refer to 5E Advanced Materials Inc. together with its consolidated subsidiaries unless the context suggests otherwise.

TRADEMARKS AND TRADE NAMES

This document contains references to trademarks and service marks belonging to other entities. Solely for convenience, trademarks and trade
names referred