BEST SPAC I Acquisition Corp. Unit Insider Trading Activity

Insider Trade Summary

Net Buyer: 554,000 shares

Net Buy 2 txns

Insider BEST SPAC I (Holdings) Corp.

Role 10% Owner

Bought 554,000 shs ($0.00)

Type	Security	Shares	Price	Value
Purchase	Rights to receive Class A ordinary shares	277,000	$0.00	$0.00
Purchase	Class A ordinary shares	277,000	$0.00	$0.00

Holdings After Transaction: Rights to receive Class A ordinary shares — 277,000 contracts (Direct); Class A ordinary shares — 277,000 shares (Direct)

Footnotes (2)

1. F1. Reflects the 277,000 units owned by BEST SPAC I (Holdings) Corp., the Issuer's sponsor. Each unit consists of one Class A ordinary shares and one right to receive one-tenth (1/10) of one Class A ordinary share upon consummation of the Issuer's initial business combination. The units were purchased at $10.00 per unit for an aggregate purchase price of $2,770,000. Mr. Yun Chen and Mr. Kam Chi Kin share voting and dispositive power over our securities held by the sponsor.
2. F2. The rights convert automatically into Class A ordinary shares at the completion of the Issuer's initial business combination.

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Accepted by SEC EDGAR 06/18/2025 - 04:15 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

BEST SPAC I (Holdings) Corp.

(Last) (First) (Middle)

C/O BEST SPAC I ACQUISITION CORP.

701, 7 FLR, UNITED BLDG 17-19 JUBILEE ST

(Street)

CENTRAL K3 00000

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
BEST SPAC I Acquisition Corp. [ BSAA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
06/16/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A ordinary shares	06/16/2025		P		277,000	A	(1)	277,000	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Rights to receive Class A ordinary shares	(2)	06/16/2025		P		277,000		(2)	(2)	Class A ordinary shares	27,700	(1)(2)	277,000	D

Explanation of Responses:

1. Reflects the 277,000 units owned by BEST SPAC I (Holdings) Corp., the Issuer's sponsor. Each unit consists of one Class A ordinary shares and one right to receive one-tenth (1/10) of one Class A ordinary share upon consummation of the Issuer's initial business combination. The units were purchased at $10.00 per unit for an aggregate purchase price of $2,770,000. Mr. Yun Chen and Mr. Kam Chi Kin share voting and dispositive power over our securities held by the sponsor.

2. The rights convert automatically into Class A ordinary shares at the completion of the Issuer's initial business combination.

	/s/ Yun Chen, as Authorized Signatory	06/18/2025
	** Signature of Reporting Person	Date
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.