BSAA: Chen Yun discloses securities transactions

By AlphaYouPublished Sep 29, 2026Form 4

Stocks in this disclosure

Reported activity

Chen Yun

Reporting filer

Chen Yun reported Other (see filing) in BEST SPAC I Acquisition Corp.: 277000 units of Class A ordinary shares, dated 2026-09-29. The full Form 4 contains 3 transaction entries.

Disclosed: Sep 29, 2026

Reported details

3 entries

All validated entries in this disclosure
Security	Owner	Date	Code	Action	Quantity	Price	Filed terms and references
Class A ordinary shares	Chen Yun	2026-09-29	J	Other (see filing)	277000	Not stated (see footnotes)	Filed terms security Title: Class A ordinary shares transaction Date: 2026-09-29 deemed Execution Date: transaction Form Type: 4 transaction Code: J equity Swap Involved: 0 id: F1 transaction Timeliness: transaction Shares: 277000 id: F1 transaction Acquired Disposed Code: D shares Owned Following Transaction: 0 id: F1 direct Or Indirect Ownership: I nature Of Ownership: See Footnote id: F1
Class B ordinary shares (derivative)	Chen Yun	2026-09-29	J	Other (see filing)	1375000	Not stated (see footnotes)	Filed terms security Title: Class B ordinary shares id: F2 transaction Date: 2026-09-29 deemed Execution Date: transaction Form Type: 4 transaction Code: J equity Swap Involved: 0 id: F1 transaction Timeliness: transaction Shares: 1375000 id: F1 transaction Acquired Disposed Code: D id: F2 id: F2 underlying Security Title: Class A ordinary shares underlying Security Shares: 1375000 shares Owned Following Transaction: 0 id: F1 direct Or Indirect Ownership: I nature Of Ownership: See Footnote id: F1
Rights to receive Class A ordinary shares (derivative)	Chen Yun	2026-09-29	J	Other (see filing)	277000	Not stated (see footnotes)	Filed terms security Title: Rights to receive Class A ordinary shares id: F3 transaction Date: 2026-09-29 deemed Execution Date: transaction Form Type: 4 transaction Code: J equity Swap Involved: 0 id: F1 transaction Timeliness: transaction Shares: 277000 id: F1 transaction Acquired Disposed Code: D id: F3 id: F3 underlying Security Title: Class A ordinary shares underlying Security Shares: 27700 shares Owned Following Transaction: 0 id: F1 direct Or Indirect Ownership: I nature Of Ownership: See Footnote id: F1

Class A ordinary shares

Owner: Chen Yun
Date: 2026-09-29
Code: J
Action: Other (see filing)
Quantity: 277000
Price: Not stated (see footnotes)
Following holdings: 0
Reporting delay: 0 days
Filed terms and references: Filed terms
security Title: Class A ordinary shares
transaction Date: 2026-09-29
deemed Execution Date:
transaction Form Type: 4
transaction Code: J
equity Swap Involved: 0
id: F1
transaction Timeliness:
transaction Shares: 277000
id: F1
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 0
id: F1
direct Or Indirect Ownership: I
nature Of Ownership: See Footnote
id: F1

Class B ordinary shares (derivative)

Owner: Chen Yun
Date: 2026-09-29
Code: J
Action: Other (see filing)
Quantity: 1375000
Price: Not stated (see footnotes)
Following holdings: 0
Reporting delay: 0 days
Filed terms and references: Filed terms
security Title: Class B ordinary shares
id: F2
transaction Date: 2026-09-29
deemed Execution Date:
transaction Form Type: 4
transaction Code: J
equity Swap Involved: 0
id: F1
transaction Timeliness:
transaction Shares: 1375000
id: F1
transaction Acquired Disposed Code: D
id: F2
id: F2
underlying Security Title: Class A ordinary shares
underlying Security Shares: 1375000
shares Owned Following Transaction: 0
id: F1
direct Or Indirect Ownership: I
nature Of Ownership: See Footnote
id: F1

Rights to receive Class A ordinary shares (derivative)

Owner: Chen Yun
Date: 2026-09-29
Code: J
Action: Other (see filing)
Quantity: 277000
Price: Not stated (see footnotes)
Following holdings: 0
Reporting delay: 0 days
Filed terms and references: Filed terms
security Title: Rights to receive Class A ordinary shares
id: F3
transaction Date: 2026-09-29
deemed Execution Date:
transaction Form Type: 4
transaction Code: J
equity Swap Involved: 0
id: F1
transaction Timeliness:
transaction Shares: 277000
id: F1
transaction Acquired Disposed Code: D
id: F3
id: F3
underlying Security Title: Class A ordinary shares
underlying Security Shares: 27700
shares Owned Following Transaction: 0
id: F1
direct Or Indirect Ownership: I
nature Of Ownership: See Footnote
id: F1

Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.
Chen Yun: 10% owner.
F1: On September 29, 2026, Naoda Investments Limited, of which Mr. Yun Chen serves as the sole director, sold 100% of its interests in BEST SPAC I (Holdings) Corp., the sponsor of BEST SPAC I Acquisition Corp. (the "Issuer"), to A SPAC (Holdings) Group Corp. for $1. Mr. Chen was previously deemed a beneficial owner of the Issuer's securities by virtue of having shared voting and dispositive power with Kam Chi Kin over the securities held by the sponsor. Mr. Chen did not previously file a Form 3 with respect to such indirect beneficial ownership. As of the date of this report, Mr. Chen no longer has any voting or dispositive power over the Issuer's securities held by BEST SPAC I (Holdings) Corp.
F2: The Class B ordinary shares will automatically convert into Class A ordinary shares at the time of the Issuer's initial business combination, or earlier at the option of the holder, on a one-for-one basis, subject to adjustment. The Class B ordinary shares have no expiration date.
F3: Each holder of a right will receive one-tenth (1/10) of one Class A ordinary share upon consummation of the Issuer's initial business combination. The rights will expire worthless if the Issuer does not consummate an initial business combination within the required time period.

Original sources

SEC ownership filing

Prepared automatically from public filing data. Report a correction.

Security

Owner

Date

Code

Action

Quantity

Price

Following holdings

Reporting delay

Filed terms and references

Class A ordinary shares

Chen Yun

2026-09-29

Other (see filing)

277000

Not stated (see footnotes)

0 days

Filed terms

security Title: Class A ordinary shares
transaction Date: 2026-09-29
deemed Execution Date:
transaction Form Type: 4
transaction Code: J
equity Swap Involved: 0
id: F1
transaction Timeliness:
transaction Shares: 277000
id: F1
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 0
id: F1
direct Or Indirect Ownership: I
nature Of Ownership: See Footnote
id: F1

Class B ordinary shares (derivative)

Chen Yun

2026-09-29

Other (see filing)

1375000

Not stated (see footnotes)

0 days

Filed terms

security Title: Class B ordinary shares
id: F2
transaction Date: 2026-09-29
deemed Execution Date:
transaction Form Type: 4
transaction Code: J
equity Swap Involved: 0
id: F1
transaction Timeliness:
transaction Shares: 1375000
id: F1
transaction Acquired Disposed Code: D
id: F2
id: F2
underlying Security Title: Class A ordinary shares
underlying Security Shares: 1375000
shares Owned Following Transaction: 0
id: F1
direct Or Indirect Ownership: I
nature Of Ownership: See Footnote
id: F1

Rights to receive Class A ordinary shares (derivative)

Chen Yun

2026-09-29

Other (see filing)

277000

Not stated (see footnotes)

0 days

Filed terms

security Title: Rights to receive Class A ordinary shares
id: F3
transaction Date: 2026-09-29
deemed Execution Date:
transaction Form Type: 4
transaction Code: J
equity Swap Involved: 0
id: F1
transaction Timeliness:
transaction Shares: 277000
id: F1
transaction Acquired Disposed Code: D
id: F3
id: F3
underlying Security Title: Class A ordinary shares
underlying Security Shares: 27700
shares Owned Following Transaction: 0
id: F1
direct Or Indirect Ownership: I
nature Of Ownership: See Footnote
id: F1

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.

Chen Yun: 10% owner.

F1: On September 29, 2026, Naoda Investments Limited, of which Mr. Yun Chen serves as the sole director, sold 100% of its interests in BEST SPAC I (Holdings) Corp., the sponsor of BEST SPAC I Acquisition Corp. (the "Issuer"), to A SPAC (Holdings) Group Corp. for $1. Mr. Chen was previously deemed a beneficial owner of the Issuer's securities by virtue of having shared voting and dispositive power with Kam Chi Kin over the securities held by the sponsor. Mr. Chen did not previously file a Form 3 with respect to such indirect beneficial ownership. As of the date of this report, Mr. Chen no longer has any voting or dispositive power over the Issuer's securities held by BEST SPAC I (Holdings) Corp.

F2: The Class B ordinary shares will automatically convert into Class A ordinary shares at the time of the Issuer's initial business combination, or earlier at the option of the holder, on a one-for-one basis, subject to adjustment. The Class B ordinary shares have no expiration date.

F3: Each holder of a right will receive one-tenth (1/10) of one Class A ordinary share upon consummation of the Issuer's initial business combination. The rights will expire worthless if the Issuer does not consummate an initial business combination within the required time period.