Claudius Tsang - 29 Sep 2026 Form 3 Insider Report for BEST SPAC I Acquisition Corp. (BSAA)

Reporting relationship: 10%+ Owner
Issuer ticker: BSAA
Reported as of: 29 Sep 2026
Net transaction value: $0
SEC form: 3
Accepted by SEC: 29 Sep 2026, 16:45:05 UTC
Prior SEC filing: 31 Jul 2025
Source filing: View source filing
Reporting owner signature: /s/ Claudius Tsang

Filing notes and source

Key filing fact

Claudius Tsang filed Form 3 for BEST SPAC I Acquisition Corp. (BSAA) on 29 Sep 2026.

Key facts

This page summarizes Claudius Tsang's Form 3 filing for BEST SPAC I Acquisition Corp. (BSAA).
0 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 29 Sep 2026, 16:45.

Change

Previous filing in this sequence was filed on 31 Jul 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (1)

CIK 0001845870 Primary reporting owner

Tsang Claudius

Relationship: 10%+ Owner
Address: C/O BEST SPAC I ACQUISITION CORP., 701, 7 FLR, UNITED BLDG 17-19 JUBILEE ST, HONG KONG, HONG KONG
Signature: /s/ Claudius Tsang
Signature date: 29 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

BSAA holding

Class A ordinary shares

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 277,000
Date: 29 Sep 2026
Ownership: See Footnote
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

BSAA holding Derivative

Class B ordinary shares

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 29 Sep 2026
Ownership: See Footnote
Underlying class: Class A ordinary shares
Underlying amount: 1,375,000
Exercise price
Footnotes: F1, F2

BSAA holding Derivative

Rights to receive Class A ordinary shares

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 29 Sep 2026
Ownership: See Footnote
Underlying class: Class A ordinary shares
Underlying amount: 27,700
Exercise price
Footnotes: F1, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

The securities reported herein are held by BEST SPAC I (Holdings) Corp. ("Sponsor"). On September 29, 2026, A SPAC (Holdings) Group Corp. acquired from Naoda Investments Limited 100% of Sponsor's issued and outstanding ordinary shares. In connection with such acquisition, Claudius Tsang, a director of A SPAC (Holdings) Group Corp., was appointed the sole director of the Sponsor and shares voting and dispositive power over the securities held by the Sponsor with Kam Chi Kin . The reporting person disclaims any beneficial ownership in the securities held by the Sponsor, except to the extent of his pecuniary interest therein.

Footnote 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.

Footnote 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.