| Item 1. | |
| (a) | Name of issuer:
BEST SPAC I Acquisition Corp. |
| (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") |
| (b) | Address or principal business office or, if none, residence:
701, 7/Floor, United Building, 17-19 Jubilee Street, Hong Kong |
| (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. |
| (d) | Title of class of securities:
Class A Ordinary Shares, no par value |
| (e) | CUSIP No.:
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);
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| (c) | Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
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| (d) | Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
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| (e) | An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
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| (f) | An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
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| (g) | A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
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| (h) | A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
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| (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);
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| (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).
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| | |
| 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
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| Item 5. | Ownership of 5 Percent or Less of a Class. |
| | |
| Item 6. | Ownership of more than 5 Percent on Behalf of Another Person. |
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Not Applicable
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| Item 7. | Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person. |
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Not Applicable
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| Item 8. | Identification and Classification of Members of the Group. |
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Not Applicable
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| Item 9. | Notice of Dissolution of Group. |
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Not Applicable
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Rule 13d-1(d)