AWM reports 3.1% stake in Everspin Technologies

AWM Investment Company, Inc., as investment adviser to four Special Situations funds, reports beneficial ownership of 750,000 shares of EVERSPIN TECHNOLOGIES INC. common stock.

Rhea-AI Filing Summary

AWM Investment Company, Inc., as investment adviser to four Special Situations funds, reports beneficial ownership of 750,000 shares of EVERSPIN TECHNOLOGIES INC. common stock. This represents 3.1% of the outstanding class. The shares are held across Special Situations Fund III QP, L.P., Special Situations Cayman Fund, L.P., Special Situations Technology Fund, L.P., and Special Situations Technology Fund II, L.P. AWM has sole voting and sole dispositive power over all 750,000 shares and no shared voting or dispositive power. The filing characterizes this as ownership of 5 percent or less of the class.

Key Figures

Beneficial ownership: 750,000 shares Ownership percentage: 3.1% SSFQP holdings: 289,445 shares +4 more

7 metrics

Beneficial ownership 750,000 shares Total Everspin Technologies common shares beneficially owned by AWM

Ownership percentage 3.1% Percent of Everspin Technologies common stock class beneficially owned

SSFQP holdings 289,445 shares Shares held by Special Situations Fund III QP, L.P.

Cayman holdings 93,797 shares Shares held by Special Situations Cayman Fund, L.P.

TECH holdings 61,380 shares Shares held by Special Situations Technology Fund, L.P.

TECH II holdings 305,378 shares Shares held by Special Situations Technology Fund II, L.P.

Ownership threshold status 5 percent or less Item 5 disclosure of class ownership level

Key Terms

beneficially owned, sole voting power, sole dispositive power, investment adviser, +1 more

5 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 750,000"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"5 | Sole Voting Power 750,000.00"

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 financial

"7 | Sole Dispositive Power 750,000.00"

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.

investment adviser financial

"AWM is the investment adviser to each of the Funds."

An investment adviser is a person or firm that professionally manages money and gives recommendations about buying, selling, or holding investments. Like a financial coach or guide, they have a legal duty to act in a client's best financial interest, so their advice, fees and potential conflicts can directly affect returns and risk — making their role important for investors who want informed, accountable help with portfolios.

percent of class financial

"Item 4. | Ownership (b) | Percent of class: 3.1 %"

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

FAQ

What ownership in EVERSPIN TECHNOLOGIES INC. (MRAM) does AWM report in this Schedule 13G/A?

AWM Investment Company, Inc. reports beneficial ownership of 750,000 shares of EVERSPIN TECHNOLOGIES INC. common stock, representing 3.1% of the outstanding class, held through four affiliated Special Situations funds it advises.

How is AWM’s 750,000-share MRAM position allocated among its funds?

The 750,000 EVERSPIN shares are held as follows: 289,445 by SSFQP, 93,797 by Cayman, 61,380 by TECH, and 305,378 by TECH II. AWM, as investment adviser, has voting and investment power over these holdings.

What percentage of EVERSPIN TECHNOLOGIES INC. (MRAM) does AWM own according to this filing?

AWM reports that it beneficially owns 3.1% of EVERSPIN TECHNOLOGIES INC.’s common stock. The filing also states that this constitutes ownership of 5 percent or less of the class under Schedule 13G reporting rules.

Does AWM have sole or shared voting power over its MRAM shares?

AWM states it has sole voting power over 750,000 shares of EVERSPIN common stock and no shared voting power. It similarly reports sole dispositive power over all of these shares, with no shared dispositive power.

Who controls AWM and the Special Situations funds investing in EVERSPIN (MRAM)?

The filing identifies David M. Greenhouse and Adam C. Stettner as controlling principals of AWM and members of the general partners of the Special Situations funds that hold EVERSPIN shares, giving them control over the adviser entities.

What is the security covered in AWM’s Schedule 13G/A for MRAM?

The security is EVERSPIN TECHNOLOGIES INC. Common Stock, par value $0.0001, with CUSIP 30041T104. AWM’s reported beneficial ownership and voting power relate specifically to this class of common stock.

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Available on EDGAR 08/14/2026 - 03:35 PM Accepted by SEC EDGAR 08/14/2026 - 03:34 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 8)

EVERSPIN TECHNOLOGIES INC.

(Name of Issuer)

Common Stock, Par Value $.0001

(Title of Class of Securities)

30041T104

(CUSIP Number)

06/30/2026

(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): 30041T104

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 750,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 750,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

750,000.00

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)

3.1 %

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 289,445 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 93,797 Shares held by Cayman, 61,380 Shares held by TECH and 305,378 Shares held by TECH II

SCHEDULE 13G

Item 1.
(a)	Name of issuer: EVERSPIN TECHNOLOGIES INC.
(b)	Address of issuer's principal executive offices: 5670 W. CHANDLER BOULEVARD, SUITE 130, CHANDLER, ARIZONA, 85226
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: The principal business address for AWM is c/o Special Situations Funds, 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 $.0001
(e)	CUSIP No.: 30041T104
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: 750,000
(b)	Percent of class: 3.1 %
(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 289,445 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 93,797 Shares held by Cayman, 61,380 Shares held by TECH and 305,378 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:
	(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 289,445 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 93,797 Shares held by Cayman, 61,380 Shares held by TECH and 305,378 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:
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
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:	08/14/2026