BEST SPAC I Acquisition Corp.: 5%+ holders

As of November 10, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of BEST SPAC I Acquisition Corp. The largest reported stake is Tsang Claudius', at 80%. 18 filings are on record since July 11, 2025 (Schedule 13D, September 29, 2026).

RIVERNORTH CAPITAL MANAGEMENT, LLC also filed stake reports on 23 other companies ↓

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Key facts

• Event date 2026-09-29 · Holder: Tsang Claudius · Percent: 80% · Shares: 1,652,000 · SCHEDULE 13D
• Event date 2026-09-29 · Holder: Yun Chen · Percent: 0% · Shares: 0 · SCHEDULE 13G/A
• Filing 2026-08-13 · Reporting person: Mizuho Financial Group, Inc. · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-13
• Filing 2026-08-05 · Reporting person: W. R. Berkley Corporation · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-05
• Filing 2026-07-09 · Reporting person: Rivernorth Capital Management, LLC · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-07-09

BEST SPAC I Acquisition Corp. has 18 Schedule 13D or 13G filings on record since 2025-07-11. 2 holders' latest filing reports 5% or more of class a ordinary shares, no par value. Each figure below is the holder's own, as filed, with the filing linked.

Holders

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More on BEST SPAC I Acquisition Corp. and the records around it.

BEST SPAC I Acquisition Corp. elsewhere on the record

• Who owns it

Companies that share a holder

• RIVERNORTH CAPITAL MANAGEMENT, LLC also filed stake reports on 23 other companies: FG Merger II Corp. (Oct 2026), YHN Acquisition I Ltd (Oct 2026), BLACKROCK MUNIYIELD QUALITY FUND III, INC. (Aug 2026)
• Feis Equities LLC also filed stake reports on 44 other companies: SPACCircle Acquisition Corp. (Oct 2026), Aperture AC (Oct 2026), Pine Tree Acquisition Corp. (Oct 2026)
• Mizuho Financial Group, Inc. also filed stake reports on 74 other companies: Aeon Acquisition I Corp. (Aug 2026), Alpex Acquisition Corp (Aug 2026), Aperture AC (Aug 2026)

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Voting and dispositive power, as filed

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The latest filing identifies BEST SPAC I Acquisition Corp. by CUSIP G1069P103 and gives its principal executive office as 701, 7/Floor, United Building, 17-19 Jubilee Street, Hong Kong (SCHEDULE 13D, 2026-09-29).

Source of funds (Item 3)

The information set forth in Items 4 and 5 of this Schedule 13D is hereby incorporated by reference into this Item 3. On September 29, 2026, Naoda Investments Limited and A SPAC (Holdings) Group Corp. (the "Buyer") entered into an instrument of transfer (the "Instrument of Transfer"). Pursuant to the Instrument of Transfer, among other things, the Buyer acquired 100% of the Sponsor's issued and outstanding ordinary shares for $1. The source of these funds used for the purchase of the equity of the Sponsor under the Instrument of Transfer consists of funds from the Reporting Person.Tsang Claudius, SCHEDULE 13D, 2026-09-29

Purpose of Transaction (Item 4)

Tsang Claudius

The information set forth in Item 3 of this Schedule 13D is hereby incorporated by reference into this Item 4. The Reporting Person, at any time and from time to time, may directly or indirectly acquire additional securities of the Issuer, depending upon an ongoing evaluation of its investment in such securities, applicable legal and/or contractual restrictions, prevailing market conditions, other investment opportunities, liquidity requirements of the Reporting Person and/or other investment considerations. Except as described in this Statement, the Reporting Person does not have any present plans or proposals that relate to or would result in any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D, except as set forth herein or such as would occur upon or in connection with completion of, or following, any of the actions discussed herein. The Reporting Person acquired the shares reported herein for investment purposes. The Reporting Person intends to review their investment in the Issuer through the Sponsor on a continuing basis. Depending on various factors including, without limitation, the Issuer's financial position and investment strategy, the price levels of the ordinary shares, conditions in the securities markets and general economic and industry conditions, the Reporting Person may in the future take such actions with respect to their investment in the Issuer as they deem appropriate including, without limitation, engaging in …The first part of Item 4 of the SCHEDULE 13D filed 2026-09-29; the filing has the rest

Timeline

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Questions about who owns BEST SPAC I Acquisition Corp.

Who owns BEST SPAC I Acquisition Corp.?

On this page, 2 holders' latest ownership filings report 5% or more of BEST SPAC I Acquisition Corp.: Tsang Claudius (80%, Schedule 13D, filed 2026-09-29) and BEST SPAC I (Holdings) Corp. (22.3%, Schedule 13G, filed 2025-08-01).

Who are the largest shareholders of BEST SPAC I Acquisition Corp.?

By the share each holder's latest filing reports, the largest holders of BEST SPAC I Acquisition Corp. on this page are Tsang Claudius (80%) and BEST SPAC I (Holdings) Corp. (22.3%).

When did Tsang Claudius buy into BEST SPAC I Acquisition Corp.?

The filings give report dates, not purchase dates. The earliest filing from Tsang Claudius on this page is the Schedule 13D, filed 2026-09-29, reporting 80%.

Is this an audit or a full list?

Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 18 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.

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Where this comes from

Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.

Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.

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