Beneficial Ownership Report · SCHEDULE 13G/A
Quantumsphere Acquisition Corporation
QUMSNASDAQEQUITYCurrent
Beneficial Ownership Report
Structured filing — SCHEDULE 13G/A
primary_doc.xml
Amendment · This filing reports the amendment as submitted.
Subject company
- Company
- Quantumsphere Acquisition Corporation
- Company CIK
- 0002070900
- Street
- 1185 Avenue of the Americas
- Street (continued)
- Suite 349
- City
- New York
- State / country code
- NY
- Postal code
- 10036
Statement details
- Amendment number
- 1
- Security class
- Ordinary Shares, par value $0.0001 per share
- Event date
- 09/30/2026
- Rule designation
- Rule 13d-1(b)
Reporting person 1
- Name
- Wolverine Asset Management, LLC
- Citizenship / organization
- IL
- Reporting person type
- IA
- Aggregate amount owned
- 335,957.00
- Percent of class
- 2.95
- Sole voting power
- 0.00
- Shared voting power
- 335,957.00
- Sole dispositive power
- 0.00
- Shared dispositive power
- 335,957.00
- Aggregate excludes certain shares
- N
Reporting person 2
- Name
- Wolverine Holdings, LLC
- Citizenship / organization
- DE
- Reporting person type
- HC
- Aggregate amount owned
- 335,957.00
- Percent of class
- 2.95
- Sole voting power
- 0.00
- Shared voting power
- 335,957.00
- Sole dispositive power
- 0.00
- Shared dispositive power
- 335,957.00
- Aggregate excludes certain shares
- N
Reporting person 3
- Name
- Christopher L. Gust
- Citizenship / organization
- IL
- Reporting person type
- HC · IN
- Aggregate amount owned
- 335,957.00
- Percent of class
- 2.95
- Sole voting power
- 0.00
- Shared voting power
- 335,957.00
- Sole dispositive power
- 0.00
- Shared dispositive power
- 335,957.00
- Aggregate excludes certain shares
- N
Reporting person 4
- Name
- Robert R. Bellick
- Citizenship / organization
- IL
- Reporting person type
- HC · IN
- Aggregate amount owned
- 335,957.00
- Percent of class
- 2.95
- Sole voting power
- 0.00
- Shared voting power
- 335,957.00
- Sole dispositive power
- 0.00
- Shared dispositive power
- 335,957.00
- Aggregate excludes certain shares
- N
Item 1
Issuer
Quantumsphere Acquisition Corporation
Principal executive office address
1185 Avenue of the Americas, Suite 349, New York, NY 10036
Item 2
Citizenship
Wolverine Asset Management, LLC - Illinois Wolverine Holdings, LLC - Delaware Christopher L. Gust - U.S. Citizen Robert R. Bellick - U.S. Citizen
Filing person
Wolverine Asset Management, LLC Wolverine Holdings, LLC Christopher L. Gust Robert R. Bellick
Principal business or residence address
c/o Wolverine Asset Management, LLC 175 West Jackson Boulevard, Suite 340 Chicago, IL 60604
Item 3
Not applicable indication
N
Type of filing person
IA · HC
Item 4
Percent of class
WAM may be deemed the beneficial owner of 2.95% of the Issuer's outstanding Ordinary Shares and each of Wolverine Holdings, Mr. Bellick, and Mr. Gust may be deemed the beneficial owner of 2.95% of the Issuer's outstanding Ordinary Shares. Percentage calculated by dividing the number of shares deemed beneficially owned by each reporting person by 11,406,650 (the number of Ordinary Shares outstanding as of August 14, 2026 according to the Issuer's Form 10-Q filed August 14, 2026).
Amount beneficially owned
Wolverine Asset Management, LLC ("WAM") is an investment adviser and has voting and dispositive power over 335,957 of the Issuer's Ordinary Shares. The sole member and manager of WAM is Wolverine Holdings, LLC ("Wolverine Holdings"). Robert R. Bellick and Christopher L. Gust, may be deemed to control Wolverine Holdings in their roles as Managers of Wolverine Holdings. Each of Wolverine Holdings, Mr. Bellick, and Mr. Gust have voting and dispositive power over 335,957 of the Issuer's Ordinary Shares.
Sole voting power
0
Shared voting power
WAM has shared power to vote or direct the vote of 335,957 of the Issuer's Ordinary Shares, and each of Wolverine Holdings, Mr. Bellick, and Mr. Gust has shared power to vote or direct the vote of 335,957 of the Issuer's Ordinary Shares, in each case as set forth in Item 4(a) above.
Sole dispositive power
0
Shared dispositive power
WAM has shared power to dispose or direct the disposition of 335,957 of the Issuer's Ordinary Shares, and each of Wolverine Holdings, Mr. Bellick, and Mr. Gust has shared power to dispose or direct the disposition of 335,957 of the Issuer's Ordinary Shares, in each case as set forth in Item 4(a) above.
Item 5
Not applicable indication
N
Ownership of 5% or less
Y
Item 6
Not applicable indication
Y
Item 7
Not applicable indication
Y
Item 8
Not applicable indication
Y
Item 9
Not applicable indication
Y
Item 10
Not applicable indication
N
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 1
- Reporting person
- Wolverine Asset Management, LLC
- Signed
- /s/ Kenneth L. Nadel
- Title
- Kenneth L. Nadel, Chief Operating Officer
- Date
- 10/05/2026
Signature 2
- Reporting person
- Wolverine Holdings, LLC
- Signed
- /s/ Christopher L. Gust
- Title
- Christopher L. Gust, Manager
- Date
- 10/05/2026
Signature 3
- Reporting person
- Christopher L. Gust
- Signed
- /s/ Christopher L. Gust
- Title
- Christopher L. Gust
- Date
- 10/05/2026
Signature 4
- Reporting person
- Robert R. Bellick
- Signed
- /s/ Robert R. Bellick
- Title
- Robert R. Bellick
- Date
- 10/05/2026
Company context
We are a newly formed blank check company incorporated as a Cayman Islands exempted company on July 23, 2024 under the laws of the Cayman Islands with limited liability. We are formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or similar business combination with one or more businesses or entities, which we refer to throughout this prospectus as our initial business combination. Our efforts to identify a prospective target business will not be limited to a particular geographic region or industry. We do not have any specific business combination under consideration and we have not (nor has anyone on our behalf), directly or indirectly, contacted any prospective target business or had any substantive discussions, formal or otherwise, with respect to such a transaction with our company. Our ability to identify and evaluate a target company may be impacted by significant competition among other SPACs in pursuing a business combination transaction candidate and the significant competition may impact the attractiveness of the acquisition terms that we will be able to negotiate.