# EDGAR Filing Document

**Accession Number:** 0002089984
**File Stem:** 0001829126-25-007896
**Filing Date:** 2025-10
**Character Count:** 5547
**Document Hash:** b6ff16ac168027a4b069b3f4f5038ddc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001829126-25-007896.hdr.sgml**: 20251003

**ACCESSION NUMBER**: 0001829126-25-007896

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250929

**FILED AS OF DATE**: 20251003

**DATE AS OF CHANGE**: 20251003

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** BP SPAC Sponsor II LLC
- **CENTRAL INDEX KEY:** 0002089984

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** TX
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42871
- **FILM NUMBER:** 251375412

**BUSINESS ADDRESS:**
- **STREET 1:** 1104 LINNEA LANE
- **CITY:** SOUTHLAKE
- **STATE:** TX
- **ZIP:** 76092
- **BUSINESS PHONE:** 5857430049

**MAIL ADDRESS:**
- **STREET 1:** 1104 LINNEA LANE
- **CITY:** SOUTHLAKE
- **STATE:** TX
- **ZIP:** 76092
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** StoneBridge Acquisition II Corp
- **CENTRAL INDEX KEY:** 0002043630
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 000000000

**BUSINESS ADDRESS:**
- **STREET 1:** ONE WORLD TRADE CENTER
- **STREET 2:** SUITE 8500
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10007
- **BUSINESS PHONE:** 646-314-3555

**MAIL ADDRESS:**
- **STREET 1:** ONE WORLD TRADE CENTER
- **STREET 2:** SUITE 8500
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10007

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>BP SPAC Sponsor II LLC<br><sub>(Last) (First) (Middle)</sub><br>1104 LINNEA LN<br>SUITE 8500<br><sub>(Street)</sub><br>SOUTHLAKE,, TX 76092<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>StoneBridge Acquisition II Corp [ APAC ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2025-09-29 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [X] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Class B Ordinary Shares | <sup>(1)</sup> | <sup>(1)</sup> | Class A Ordinary Shares | 1091667<sup>(2)</sup> | <sup>(1)</sup> | I | See footnote<sup>(2)</sup> |

---

### Footnotes:

(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.

**Signature:** /s/ Bhargava Marepally, as Managing Member of BP SPAC Sponsor II LLC  
**Date:** 2025-10-03

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (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).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**