AWM reports 3.25M shares of 5E Advanced Materials (NASDAQ: FEAM)

Rhea-AI Filing Summary

AWM Investment Company, Inc. reports beneficial ownership of 3,250,000 shares of 5E Advanced Materials, Inc., representing 7.8% of the outstanding common stock as of the filing. The shares are held across four funds for which AWM is investment adviser: SSFQP (1,725,425), Cayman (503,100), TECH (179,075), and TECH II (842,400). AWM states it holds sole voting and sole dispositive power over these shares through its advisory role. The filing is signed by Adam Stettner on 05/04/2026.

Key Figures

Beneficial ownership: 3,250,000 shares Ownership percent: 7.8% SSFQP holdings: 1,725,425 shares +4 more

7 metrics

Beneficial ownership 3,250,000 shares Schedule 13G beneficial ownership reported for FEAM

Ownership percent 7.8% Percent of class reported on Schedule 13G

SSFQP holdings 1,725,425 shares Held by Special Situations Fund III QP, L.P. as of 03/31/2026

Cayman holdings 503,100 shares Held by Special Situations Cayman Fund, L.P. as of 03/31/2026

TECH holdings 179,075 shares Held by Special Situations Technology Fund, L.P. as of 03/31/2026

TECH II holdings 842,400 shares Held by Special Situations Technology Fund II, L.P. as of 03/31/2026

Filing signature date 05/04/2026 Signature date on Schedule 13G

Key Terms

Schedule 13G, Sole voting power, Sole dispositive power, Beneficial ownership

4 terms

Schedule 13G regulatory

"AWM filed a Schedule 13G to report its beneficial ownership"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Sole voting power regulatory

"AWM holds sole voting power over 1,725,425 shares held by SSFQP"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Sole dispositive power regulatory

"AWM holds sole investment power over 1,725,425 shares held by SSFQP"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Beneficial ownership financial

"Amount beneficially owned: 3,250,000 (b) Percent of class: 7.8 %"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

5E Advanced Materials, Inc.

(Name of Issuer)

Common Stock, Par Value $0.01

(Title of Class of Securities)

33830Q208

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 33830Q208

1

Names of Reporting Persons

AWM Investment Company, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 3,250,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 3,250,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,250,000.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.8 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: AWM Investment Company, Inc., a Delaware Corporation (AWM), is the investment adviser to Special Situations Fund III QP, L.P. (SSFQP), Special Situations Cayman Fund, L.P. (Cayman), Special Situations Technology Fund, L.P. (TECH) and Special Situations Technology Fund II, L.P. (TECH II), (SSFQP, Cayman, TECH and TECH II will hereafter be referred to as the Funds). As the investment adviser to the Funds, AWM holds sole voting and investment power over 1,725,425 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 503,100 Shares held by Cayman, 179,075 Shares held by TECH and 842,400 Shares held by TECH II.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: 5E Advanced Materials, Inc.
(b)	Address of issuer's principal executive offices: 9329 MARIPOSA ROAD, SUITE 210, HESPERIA, CALIFORNIA, 92344
Item 2.
(a)	Name of person filing: The person filing this report is AWM Investment Company, Inc., a Delaware corporation (AWM), which is the investment adviser to Special Situations Cayman Fund, L.P., a Cayman Islands Limited Partnership (CAYMAN), Special Situations Fund III QP, L.P., a Delaware limited partnership (SSFQP), Special Situations Technology Fund, L.P., a Delaware limited partnership (TECH) and Special Situations Technology Fund II, L.P., a Delaware limited partnership (TECH II), (CAYMAN, SSFQP, TECH and TECH II, will hereafter be referred to as the Funds). The principal business of each Fund is to invest in equity and equity-related securities and other securities of any kind or nature. David M. Greenhouse (Greenhouse) and Adam C. Stettner (Stettner) are members of: SSCayman, L.L.C., a Delaware limited liability company (SSCAY), the general partner of CAYMAN; MGP Advisers Limited Partnership, a Delaware limited partnership (MGP), the general partner of SSFQP and SST Advisers, L.L.C., a Delaware limited liability company (SSTA), the general partner of TECH and TECH II. Greenhouse and Stettner are also controlling principals of AWM.
(b)	Address or principal business office or, if none, residence: 527 Madison Avenue, Suite 2600 New York, NY 10022
(c)	Citizenship: AWM is a Delaware Corporation
(d)	Title of class of securities: Common Stock, Par Value $0.01
(e)	CUSIP Number(s): 33830Q208
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 3,250,000
(b)	Percent of class: 7.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: AWM is the investment adviser to each of the Funds. As the investment adviser to the Funds, AWM holds sole voting power over 1,725,425 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 503,100 Shares held by Cayman, 179,075 Shares held by TECH and 842,400 Shares held by TECH II. Greenhouse and Stettner are members of: SSCAY, the general partner of CAYMAN; MGP, the general partner of SSFQP and SSTA, the general partner of TECH and TECH II. Greenhouse and Stettner are also controlling principals of AWM.
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: AWM is the investment adviser to each of the Funds. As the investment adviser to the Funds, AWM holds sole investment power over 1,725,425 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 503,100 Shares held by Cayman, 179,075 Shares held by TECH and 842,400 Shares held by TECH II. Greenhouse and Stettner are members of: SSCAY, the general partner of CAYMAN; MGP, the general partner of SSFQP and SSTA, the general partner of TECH and TECH II. Greenhouse and Stettner are also controlling principals of AWM.
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

AWM Investment Company, Inc.

Signature:	Adam Stettner
Name/Title:	Executive Vice President
Date:	05/04/2026

FAQ

What stake does AWM hold in 5E Advanced Materials (FEAM)?

AWM reports beneficial ownership of 3,250,000 shares, equal to 7.8% of the common stock. These holdings are held by four funds advised by AWM and are disclosed on the Schedule 13G filed for FEAM.

Which funds hold the 3,250,000 shares reported by AWM?

The shares are held across four funds: Special Situations Fund III QP, L.P. (1,725,425), Special Situations Cayman Fund, L.P. (503,100), Special Situations Technology Fund, L.P. (179,075), and Special Situations Technology Fund II, L.P. (842,400).

Does AWM control voting or disposition of the FEAM shares?

AWM states it holds sole voting power and sole dispositive power over the 3,250,000 shares by virtue of its role as investment adviser to the four named funds, with no shared powers reported in the filing.

What form was filed to report AWM's holdings in FEAM?

AWM filed a Schedule 13G to report its beneficial ownership of FEAM common stock, disclosing the 3,250,000 shares and the allocation across the four funds, signed by an AWM executive on 05/04/2026.

How current is the ownership information in AWM's Schedule 13G for FEAM?

The filing lists the beneficial ownership totals and fund breakdown with an effective/reporting period shown as 03/31/2026 and the signature dated 05/04/2026, providing the timing anchors included in the disclosure.