| Item 1. | |
| (a) | Name of issuer:
Stonebridge Acquisition II Corporation |
| (b) | Address of issuer's principal executive offices:
One World Trade Center, Suite 8500, New York, NY 10007 |
| Item 2. | |
| (a) | Name of person filing:
Wolverine Asset Management, LLC
Wolverine Holdings, LLC
Christopher L. Gust
Robert R. Bellick |
| (b) | Address or principal business office or, if none, residence:
c/o Wolverine Asset Management, LLC
175 West Jackson Boulevard, Suite 340
Chicago, IL 60604 |
| (c) | Citizenship:
Wolverine Asset Management, LLC - Illinois
Wolverine Holdings, LLC - Delaware
Christopher L. Gust - U.S. Citizen
Robert R. Bellick - U.S. Citizen |
| (d) | Title of class of securities:
Class A Ordinary Shares, par value $0.0001 per share |
| (e) | CUSIP No.:
G850961080 |
| 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:
Wolverine Asset Management, LLC ("WAM") is an investment adviser and has voting and dispositive power over 401,013 Class A ordinary shares of the Issuer. 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 401,013 Class A ordinary shares of the Issuer. |
| (b) | Percent of class:
WAM may be deemed the beneficial owner of 6.54% of the Issuer's outstanding Class A ordinary shares and each of Wolverine Holdings, Mr. Bellick, and Mr. Gust may be deemed the beneficial owner of 6.54% of the Issuer's outstanding Class A Ordinary Shares. Percentages were calculated by dividing the number of shares deemed beneficially owned by each reporting person by 6,133,750 (the number of shares outstanding as of March 18, 2026 according to the Issuer's 10-K filed March 18, 2026). |
| (c) | Number of shares as to which the person has:
|
| | (i) Sole power to vote or to direct the vote:
0
|
| | (ii) Shared power to vote or to direct the vote:
WAM has shared power to vote or direct the vote of 401,013 Class A ordinary shares of the Issuer, and each of Wolverine Holdings, Mr. Bellick, and Mr. Gust has shared power to vote or direct the vote of 401,013 Class A ordinary shares of the Issuer, in each case as set forth in Item4(a) above.
|
| | (iii) Sole power to dispose or to direct the disposition of:
0
|
| | (iv) Shared power to dispose or to direct the disposition of:
WAM has shares power to dispose or direct the disposition of 401,013 Class A ordinary shares of the Issuer, and each of Wolverine Holdings, Mr. Bellick, and Mr. Gust has shared power to dispose or direct the disposition of 401,013 Class A ordinary shares of the Issuer, in each case as set forth in Item4(a) above.
|
| 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. |
| |
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
Wolverine Flagship Fund Trading Limited is known to have the right to receive the receipt of dividends from, or the proceeds from the sale of, the shares of the Issuer's Class A Ordinary Shares covered by this statement that may be deemed to be beneficially owned by WAM. |
| 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
|