AWM Investment Company, Inc. reports beneficial ownership of 2,077,231 shares of EVERSPIN TECHNOLOGIES INC. The filing states AWM holds 8.9% of the outstanding common stock as of 03/31/2026. Holdings are held through four funds: SSFQP (801,652 shares), TECH II (845,793 shares), Cayman (259,783 shares) and TECH (170,003 shares). AWM claims sole voting and dispositive power over these shares through its adviser role; the report is signed by an AWM executive.
Positive
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Negative
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Insights
AWM holds a concentrated 8.9% stake across four related funds.
AWM reports beneficial ownership of 2,077,231 shares via SSFQP, TECH II, Cayman and TECH, with sole voting and dispositive authority attributed to AWM as investment adviser. The breakdown clarifies which fund holds the largest position (SSFQP and TECH II together represent the majority).
This amendment updates ownership disclosure; cash‑flow treatment and any trading intent are not stated in the excerpt.
Key Figures
Total shares owned:2,077,231 sharesPercent of class:8.9%SSFQP holdings:801,652 shares+3 more
6 metrics
Total shares owned2,077,231 sharesBeneficially owned as reported
Percent of class8.9%Percent of common stock as stated in the filing
SSFQP holdings801,652 sharesShares held by Special Situations Fund III QP, L.P.
TECH II holdings845,793 sharesShares held by Special Situations Technology Fund II, L.P.
Cayman holdings259,783 sharesShares held by Special Situations Cayman Fund, L.P.
TECH holdings170,003 sharesShares held by Special Situations Technology Fund, L.P.
Key Terms
Schedule 13G/A, beneficial ownership, sole voting power, dispositive power
4 terms
Schedule 13G/Aregulatory
"Amendment No. 7 ) EVERSPIN TECHNOLOGIES INC."
A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.
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.
sole voting powerregulatory
"AWM holds sole voting power over 801,652 shares"
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.
dispositive powerregulatory
"sole investment power over 801,652 shares of Common Stock"
Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 7)
EVERSPIN TECHNOLOGIES INC.
(Name of Issuer)
Common Stock, Par Value $.0001
(Title of Class of Securities)
30041T104
(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):
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
2,077,231.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
2,077,231.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
2,077,231.00
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)
8.9 %
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 801,652 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 259,783 Shares held by Cayman, 170,003 Shares held by TECH and 845,793 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:
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:
2,077,231
(b)
Percent of class:
8.9%
(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 801,652 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 259,783 Shares held by Cayman, 170,003 Shares held by TECH and 845,793 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 801,652 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 259,783 Shares held by Cayman, 170,003 Shares held by TECH and 845,793 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.
What stake does AWM Investment Company report in EVERSPIN TECHNOLOGIES (MRAM)?
AWM reports beneficial ownership of 2,077,231 shares, representing 8.9% of common stock as of 03/31/2026. The stake is held across four affiliated funds with AWM as investment adviser.
Which funds hold the shares attributed to AWM in the MRAM filing?
The shares are held by four funds: SSFQP (801,652), TECH II (845,793), Cayman (259,783), and TECH (170,003). AWM reports sole voting and dispositive power over these holdings.
Does AWM claim voting or dispositive power over the MRAM shares?
Yes. AWM states it holds sole voting and sole dispositive power over the 2,077,231 shares by virtue of its adviser role to the four funds listed in the filing.
Who signed the Schedule 13G/A amendment for AWM regarding MRAM?
The filing excerpt is signed by Adam Stettner, Executive Vice President of AWM, with the signature dated 05/04/2026 in the provided text.
