Clear Street reports 5% stake in StoneBridge Acquisition II

Clear Street LLC reported beneficial ownership of common stock of StoneBridge Acquisition II Corporation.

Rhea-AI Filing Summary

Clear Street LLC reported beneficial ownership of common stock of StoneBridge Acquisition II Corporation. Clear Street holds 308,923 shares, representing 5.0% of the outstanding common stock. The firm has sole power to vote and dispose of all 308,923 shares and no shared voting or dispositive power.

Key Figures

Shares beneficially owned: 308,923 shares Percent of class: 5.0% Sole voting power: 308,923 shares +3 more

6 metrics

Shares beneficially owned 308,923 shares Common stock of StoneBridge Acquisition II Corporation reported by Clear Street LLC

Percent of class 5.0% Portion of StoneBridge Acquisition II Corporation common stock class held by Clear Street LLC

Sole voting power 308,923 shares Shares over which Clear Street LLC has sole power to vote or direct the vote

Shared voting power 0 shares Shares over which Clear Street LLC has shared power to vote or direct the vote

Sole dispositive power 308,923 shares Shares over which Clear Street LLC has sole power to dispose or direct disposition

Shared dispositive power 0 shares Shares over which Clear Street LLC has shared power to dispose or direct disposition

Key Terms

beneficially owned, sole power to vote, sole power to dispose, Percent of class, +1 more

5 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 308923"

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 power to vote financial

"sole power to vote or to direct the vote: 308923"

sole power to dispose financial

"sole power to dispose or to direct the disposition of: 308923"

Percent of class financial

"(b) | Percent of class: 5.0 %"

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.

CUSIP Number financial

"(e) | CUSIP Number(s): G85096108"

A CUSIP number is a nine-character code that uniquely identifies a specific U.S. or Canadian stock, bond, or other security, similar to a barcode or a social-security number for a financial instrument. It matters to investors because it removes confusion between similar securities, ensures trades and settlements are applied to the correct issue, and helps locate official documents and transaction records quickly.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What percentage of StoneBridge Acquisition II Corporation (APAC) does Clear Street LLC own?

Clear Street LLC reports beneficial ownership of 5.0% of StoneBridge Acquisition II Corporation’s common stock. This percentage is based on its holding of 308,923 shares as disclosed in the Schedule 13G ownership statement.

How many APAC common shares does Clear Street LLC beneficially own?

Clear Street LLC beneficially owns 308,923 shares of StoneBridge Acquisition II Corporation common stock. These shares give Clear Street 5.0% of the class, according to the ownership information provided in the Schedule 13G filing.

Does Clear Street LLC have sole or shared voting power over its APAC shares?

Clear Street LLC has sole voting power over 308,923 shares of StoneBridge Acquisition II Corporation and no shared voting power. It also holds sole dispositive power over the same number of shares, with no shared dispositive power reported.

Who signed the APAC Schedule 13G on behalf of Clear Street LLC?

The Schedule 13G was signed by John DiBacco, identified as Head of Markets Trading at Clear Street LLC. The signature date on the document is 06/30/2026, confirming the reported beneficial ownership as of that time.

What class of APAC securities is reported in Clear Street LLC’s Schedule 13G?

The filing covers common stock of StoneBridge Acquisition II Corporation. The class is identified as common stock with CUSIP number G85096108, and Clear Street’s beneficial ownership relates specifically to this class.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/14/2026 - 05:30 PM Accepted by SEC EDGAR 08/14/2026 - 05:30 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

StoneBridge Acquisition II Corporation

(Name of Issuer)

Common Stock

(Title of Class of Securities)

G85096108

(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): G85096108

1

Names of Reporting Persons

Clear Street LLC

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

NEW YORK

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 308,923.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

308,923.00

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)

5.0 %

12

Type of Reporting Person (See Instructions)

BD

SCHEDULE 13G

Item 1.
(a)	Name of issuer: StoneBridge Acquisition II Corporation
(b)	Address of issuer's principal executive offices: ONE WORLD TRADE CENTER SUITE 8500NEW YORK NY 10007
Item 2.
(a)	Name of person filing: Clear Street LLC
(b)	Address or principal business office or, if none, residence: 4 WORLD TRADE CENTER, 150 Greenwich St Floor 45 New York, NY 10007
(c)	Citizenship: United States
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): G85096108
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: 308923
(b)	Percent of class: 5.0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 308923
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 308923
	(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:

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.

Clear Street LLC

Signature:	John DiBacco
Name/Title:	Head of Markets Trading
Date:	06/30/2026