Company: FEAV
Filing Date: 2025-08-25
Form Type: 424B5
Source: 0001888654-25-000019
Chunk: 0

Company: 5E Advanced Materials, Inc.
Filing Date: 2025-08-25
Form: 424B5
Chunk 0
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Filed Pursuant to Rule 424(b)(5) Registration No. 333-276162 PROSPECTUS SUPPLEMENT (To Prospectus dated February 27, 2024) 2,374,481 Shares of Common Stock We are offering 2,374,481 shares of our common stock, par value $0.01 per share (“common stock”). The public offering price for each share is $3.50. Our common stock is listed on The Nasdaq Global Select Market, or Nasdaq, under the symbol “FEAM”. Our CHESS Depositary Interests (“CDIs”) are listed on the Australian Securities Exchange under the symbol “5EA” with ten CDIs representing an interest in one share of our common stock. On August 21, 2025, the last reported sale price of our common stock was $4.57 per share. Investing in our common stock involves a high degree of risk. You should carefully read and consider the risks that are described in the “ Risk Factors ” section beginning on page S- 5 of this prospectus supplement, on page 12 of the accompanying prospectus and in the documents incorporated by reference into this prospectus supplement and the accompanying prospectus before making a decision to invest in our securities.

|                                           |     | Per Share |     |       |     | Total |     |              |
|:------------------------------------------|:----|:----------|:----|------:|:----|:------|:----|-------------:|
| Public offering price                     |     | $         |     |  3.50 |     | $     |     | 8,310,683.50 |
| Underwriting discounts and commissions(1) |     | $         |     | 0.245 |     | $     |     |   581,747.84 |
| Proceeds, before expenses, to us          |     | $         |     | 3.255 |     | $     |     | 7,728,935.66 |

__________________ (1) See “Underwriting” for additional disclosure regarding the underwriting discounts and commissions and estimated offering expenses. Our largest stockholders, BEP Special Situations IV LLC (“Bluescape”) and Ascend Global Investment
Fund SPC, for and on behalf of Strategic SP (“Ascend”), have, severally and not jointly, each indicated an
interest in purchasing (directly or through related entities) approximately $350,000 in shares of common