FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * StoneBridge Acquisition Sponsor II LLC 2. Date of Event Requiring Statement (Month/Day/Year) 09/29/2025 3. Issuer Name and Ticker or Trading Symbol StoneBridge Acquisition II Corp [APAC] (Last) (First) (Middle) ONE WORLD TRADE CENTER, SUITE 8500 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed (Month/Day/Year) (Street) NEW YORK,, NY 10007 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Class B Ordinary Shares	(1)	(1)	Class A Ordinary Shares	1,091,667(2)	(1)	D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
StoneBridge Acquisition Sponsor II LLC ONE WORLD TRADE CENTER SUITE 8500 NEW YORK,, NY 10007		X

Signatures

/s/ Bhargava Marepally, Managing Member of BP SPAC Sponsor II LLC, Managing Member of StoneBridge Acquisition Sponsor II LLC		10/03/2025
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	As described in the issuer's registration statement on Form S-1 (No. 333-286983) under the heading "Description of Securities - Ordinary Shares - Founder Shares", the Class B Ordinary Shares will automatically convert into Class A Ordinary Shares at the time of the issuer's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.
(2)	These shares represent the Class B Ordinary Shares directly held by StoneBridge Acquisition Sponsor II LLC (the "Sponsor"), acquired pursuant to a subscription agreement by and between the Sponsor and the issuer. BP SPAC Sponsor II LLC is the managing member of the Sponsor. Bhargav Marepally and Prabhu Antony are the managing members of BP SPAC Sponsor II LLC, and have voting and investment discretion with respect to the Class B Ordinary Shares held directly by the Sponsor. Each of Mr. Marepally and Mr. Antony disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest each may have therein, directly or indirectly.

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