# EDGAR Filing Document

**Accession Number:** 0002051637
**File Stem:** 0001213900-25-070634
**Filing Date:** 2025-8
**Character Count:** 16664
**Document Hash:** 492201f29208637c1d17835ffb4d029b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-25-070634.hdr.sgml**: 20250801

**ACCESSION NUMBER**: 0001213900-25-070634

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13G

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250801

**DATE AS OF CHANGE**: 20250801

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BEST SPAC I Acquisition Corp.
- **CENTRAL INDEX KEY:** 0002051587
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 000000000
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-95116
- **FILM NUMBER:** 251176581

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 701, 7/FLOOR, UNITED BUILDING
- **STREET 2:** 17-19 JUBILEE STREET
- **CITY:** HONG KONG
- **PROVINCE COUNTRY:** K3
- **BUSINESS PHONE:** 852-9828-3397

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 701, 7/FLOOR, UNITED BUILDING
- **STREET 2:** 17-19 JUBILEE STREET
- **CITY:** HONG KONG
- **PROVINCE COUNTRY:** K3

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BEST SPAC I Acquistion Corp.
- **DATE OF NAME CHANGE:** 20250110
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BEST SPAC I (Holdings) Corp.
- **CENTRAL INDEX KEY:** 0002051637

**ORGANIZATION NAME:**
- **EIN:** 000000000

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G

**BUSINESS ADDRESS:**
- **STREET 1:** RM 401-402, 4/F WESTLANDS CTR
- **STREET 2:** 20 WESTLANDS RD
- **CITY:** QUARRY BAY
- **STATE:** K3
- **ZIP:** 00000
- **BUSINESS PHONE:** 852-9828-3397

**MAIL ADDRESS:**
- **STREET 1:** RM 401-402, 4/F WESTLANDS CTR
- **STREET 2:** 20 WESTLANDS RD
- **CITY:** QUARRY BAY
- **STATE:** K3
- **ZIP:** 00000

## Ex-1

**Exhibit 1**

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that this Statement is being jointly filed, and all amendments thereto will be jointly filed, by BEST SPAC I (Holdings) Corp., as the main and designated filer, on behalf of each of the persons and entities named below that is named as a reporting person in such filing. Each of the undersigned is responsible for the timely filing of this Statement and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that such information is inaccurate. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

Dated: August 1, 2025

---

| | |
|:---|:---|
| **BEST SPAC I (Holdings) Corp.** | **BEST SPAC I (Holdings) Corp.** |
| By: | /s/ Yun Chen |
| Name: | Yun Chen |
| Title: | Director |

---

---

| | |
|:---|:---|
| **Yun Chen** | **Yun Chen** |
| By: | /s/ Yun Chen |

---

---

| | |
|:---|:---|
| **Kam Chi Kin** | **Kam Chi Kin** |
| By: | /s/ Kam Chi Kin |

---

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

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**Issuer:** BEST SPAC I Acquisition Corp.

**Title of Class of Securities:** Class A Ordinary Shares, no par value

**CUSIP Number:** G1069P103

**Date of Event Which Requires Filing of this Statement:** 07/30/2025

**Check the appropriate box to designate the rule pursuant to which this Schedule is filed:**

- [ ] Rule 13d-1(b)

- [ ] Rule 13d-1(c)

- [x] Rule 13d-1(d)

---

| 1. | Names of Reporting Persons<br>BEST SPAC I (Holdings) Corp. | Names of Reporting Persons<br>BEST SPAC I (Holdings) Corp. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>D8 | Citizenship or Place of Organization<br>D8 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>1652000.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>1652000.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1652000.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1652000.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>22.3% | Percent of Class Represented by Amount in Row (9)<br>22.3% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

**Comment for Type of Reporting Person:** The 1,652,000 shares referred to in Rows 6, 8 and 9 includes the Issuer's Class B ordinary shares with no par value ("Class B Ordinary Shares") which are automatically convertible into the Issuer's Class A ordinary shares with no par value ("Class A Ordinary Shares") immediately following the Issuer's initial business combination (the "Business Combination") and may be converted at any time prior to the Business Combination at the option of the holder, as more fully described under the heading "Description of Securities " in the Issuer's Registration Statement on Form S-1 (File No. 333- 286237). Mr. Yun Chen and Mr. Kam Chi Kin share voting and dispositive power over the securities held of record by BEST SPAC I (Holdings) Corp. The percentage in Row 11 is based on 6,024,500 Class A Ordinary Shares, including Class A Ordinary Shares underlying the units, and 1,375,000 Class B Ordinary Shares issued and outstanding as of July 30, 2025.

---

| 1. | Names of Reporting Persons<br>Yun Chen | Names of Reporting Persons<br>Yun Chen |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>F4 | Citizenship or Place of Organization<br>F4 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>1652000.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>1652000.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1652000.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1652000.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>22.3% | Percent of Class Represented by Amount in Row (9)<br>22.3% |
| 12. | Type of Reporting Person (See Instructions)<br>IN | Type of Reporting Person (See Instructions)<br>IN |

**Comment for Type of Reporting Person:** The 1,652,000 shares referred to in Rows 6, 8 and 9 includes the Issuer's Class B Ordinary Shares which are automatically convertible into the Issuer's Class A Ordinary Shares immediately following the Issuer's Business Combination and may be converted at any time prior to the Business Combination at the option of the holder, as more fully described under the heading "Description of Securities " in the Issuer's Registration Statement on Form S-1 (File No. 333- 286237). Mr. Yun Chen and Mr. Kam Chi Kin share voting and dispositive power over the securities held of record by BEST SPAC I (Holdings) Corp. The percentage in Row 11 is based on 6,024,500 Class A Ordinary Shares, including Class A Ordinary Shares underlying the units, and 1,375,000 Class B Ordinary Shares issued and outstanding as of July 30, 2025.

---

| 1. | Names of Reporting Persons<br>Kam Chi Kin | Names of Reporting Persons<br>Kam Chi Kin |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>F4 | Citizenship or Place of Organization<br>F4 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>1652000.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>1652000.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1652000.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1652000.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>22.3% | Percent of Class Represented by Amount in Row (9)<br>22.3% |
| 12. | Type of Reporting Person (See Instructions)<br>IN | Type of Reporting Person (See Instructions)<br>IN |

**Comment for Type of Reporting Person:** The 1,652,000 shares referred to in Rows 6, 8 and 9 includes both the Issuer's Class B Ordinary Shares which are automatically convertible into the Issuer's Class A Ordinary Shares immediately following the Issuer's Business Combination and may be converted at any time prior to the Business Combination at the option of the holder, as more fully described under the heading "Description of Securities " in the Issuer's Registration Statement on Form S-1 (File No. 333- 286237). Mr. Yun Chen and Mr. Kam Chi Kin share voting and dispositive power over the securities held of record by BEST SPAC I (Holdings) Corp. The percentage in Row 11 is based on 6,024,500 Class A Ordinary Shares, including Class A Ordinary Shares underlying the units, and 1,375,000 Class B Ordinary Shares issued and outstanding as of July 30, 2025.

---

**Item 1(a). Name of Issuer:**
BEST SPAC I Acquisition Corp.

**Item 1(b). Address of Issuer's Principal Executive Offices:**
701, 7/Floor, United Building, 17-19 Jubilee Street, Hong Kong

**Item 2(a). Name of Person Filing:**
BEST SPAC I (Holdings) Corp., Yun Chen and Kam Chi Kin (collectively, the "Reporting Persons")

**Item 2(b). Address of Principal Business Office:**
701, 7/Floor, United Building, 17-19 Jubilee Street, Hong Kong

**Item 2(c). Citizenship:**
BEST SPAC I (Holdings) Corp. is a British Virgin Islands company. Yun Chen is a citizen of the People's Republic of China. Kam Chi Kin is a citizen of Macau, China.

**Item 2(d). Title of Class of Securities:**
Class A Ordinary Shares, no par value

**Item 2(e). CUSIP Number:**
G1069P103

**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:**

As of July 30, 2025, the Reporting Persons may be deemed to beneficially own 1,652,000 of the Issuer's Class A Ordinary Shares and Class B Ordinary Shares. BEST SPAC I (Holdings) Corp. is the record holder of the ordinary shares reported herein. Mr. Yun Chen is the sole director of BEST SPAC I (Holdings) Corp. and directs its day-to-day operations. Mr. Kam Chi Kin and Mr. Yun Chen share voting and dispositive power with respect to the securities held of record by BEST SPAC I (Holdings) Corp., and they may be deemed the beneficial owners of the securities held by BEST SPAC I (Holdings) Corp. This Statement shall not be construed as an admission that the Reporting Persons are, for purposes of Section 13(d) and 13(g), beneficial owners of any securities covered by this Statement.

**(b) Percent of class:**

The 1,652,000of the Issuer's Class A Ordinary Shares and Class B Ordinary Shares owned by the Reporting Persons constitute 22.3% of the total number of Class A Ordinary Shares and Class B Ordinary Shares issued and outstanding, assuming the conversion of all issued and outstanding Class B Ordinary Shares of the Issuer. The Class B Ordinary Shares are automatically convertible into Class A Ordinary Shares with or immediately following the Business Combination on a one-for-one basis and may be converted at any time prior to the Business Combination at the option of the holder on a one-for-one basis, subject to certain adjustments, as more fully described under the heading "Description of Securities" in the Issuer's Registration Statement on Form S-1 (File No. 333-286237). The percentage of the total ordinary shares held is based on 6,024,500 Class A Ordinary Shares, including Class A Ordinary Shares underlying the units, and 1,375,000 Class B Ordinary Shares issued and outstanding as of July 30, 2025, assuming the conversion of all Class B Ordinary Shares.

**(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:**

1,652,000

**(iii) Sole power to dispose or to direct the disposition of:**

0

**(iv) Shared power to dispose or to direct the disposition of:**

1,652,000

**Item 5. Ownership of Five Percent or Less of a Class.**

[x] If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.

**Item 6. Ownership of More than 5 Percent on Behalf of Another Person.**

Not Applicable

**Item 7. Identification and Classification of the Subsidiary**

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. Certification:**

—

### 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.

**BEST SPAC I (Holdings) Corp.**

**Date:** 08/01/2025

**By:** /s/ Yun Chen

**Name & Title:** Yun Chen/Director

**Yun Chen**

**Date:** 08/01/2025

**By:** /s/ Yun Chen

**Name & Title:** Yun Chen/Individual

**Kam Chi Kin**

**Date:** 08/01/2025

**By:** /s/ Kam Chi Kin

**Name & Title:** Kam Chi Kin/Individual