ZeroStack Corp.: 5%+ holders

As of November 7, 2026, 6 holders' latest Schedule 13D or 13G filings report owning 5% or more of ZeroStack Corp. The largest reported stake is Reis-Faria Daniel's, at 37.5%. 15 filings are on record since July 21, 2025 (Schedule 13D/A, July 21, 2026).

Highbridge Capital Management, LLC also filed stake reports on 83 other companies ↓

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Key facts

• Filing 2026-10-19 · Reporting person: Hack VC Management, LLC · Sole voting: 0 · Shared voting: 80,015 · Sole dispositive: 0 · Shared dispositive: 80,015 · SCHEDULE 13G, 2026-10-19
• Filing 2026-09-04 · Reporting person: Blockcat Pte. Ltd. · Sole voting: 1,750,000 · Shared voting: 0 · Sole dispositive: 1,750,000 · Shared dispositive: 0 · SCHEDULE 13G, 2026-09-04
• Filing 2026-09-02 · Reporting person: Puple AI Inc. · Sole voting: 1,750,000 · Shared voting: 0 · Sole dispositive: 1,750,000 · Shared dispositive: 0 · SCHEDULE 13G, 2026-09-02
• Filing 2026-07-21 · Reporting person: Reis-Faria Daniel · Sole voting: 6,925,951 · Shared voting: 0 · Sole dispositive: 6,925,951 · Shared dispositive: 0 · SCHEDULE 13D/A, 2026-07-21
• Filing 2026-07-21 · Reporting person: Heinrich Michael · Sole voting: 5,579,783 · Shared voting: 0 · Sole dispositive: 5,579,783 · Shared dispositive: 0 · SCHEDULE 13D/A, 2026-07-21

ZeroStack Corp. has 15 Schedule 13D or 13G filings on record since 2025-07-21. 6 holders' latest filing reports 5% or more of common stock, $0.0001 par value per share. Each figure below is the holder's own, as filed, with the filing linked.

Holders

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More on ZeroStack Corp. and the records around it.

ZeroStack Corp. elsewhere on the record

• Company profile and every filing Sep 2026
• Form D filing Sep 2026
• Leadership changes Aug 2026
• Who owns it

Companies that share a holder

• Highbridge Capital Management, LLC also filed stake reports on 83 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 ZeroStack Corp. by CUSIP 98957E106 and gives its principal executive office as 2626 Cole Ave, Suite 300, Dallas, TX 75204 (SCHEDULE 13G, 2026-10-19).

What the percentages are based on

Row 11 of each Reporting Person's cover page to this Schedule 13G sets forth the percentages of the shares of common stock of the Issuer beneficially owned by such Reporting Person and is incorporated by reference. The percentage set forth in each row 11 is based upon 22,276,008 shares of common stock outstanding as of September 30, 2026, as reported by the Issuer to the Reporting Persons.Alexander Pack, SCHEDULE 13G, 2026-10-19

Purpose of Transaction (Item 4)

Vaiman Dany

On May 5, 2026, the board of directors of the Issuer approved a grant of 250,000 options to the Reporting Person (the "May 2026 Option Grant"), subject to shareholder approval. The options are exercisable for shares of common stock of the Issuer at an exercise price of $5.10 per share, and vest in five equal installments subject to the Issuer's common stock meeting the following volume weighted average price ("VWAP") thresholds: 20% following VWAP of $7.65; 20% following VWAP of $10.20; 20% following VWAP of $12.75; 20% following VWAP of $15.30; and 20% following VWAP of $17.85. On July 20, 2026, the shareholders approved the May 2026 Option Grant.Item 4 of the SCHEDULE 13D/A filed 2026-07-21

Starke Clifford

Increase in number of outstanding shares of IssuerItem 4 of the SCHEDULE 13D/A filed 2025-07-21

Reis-Faria Daniel

On May 5, 2026, the board of directors of the Issuer approved a grant of 500,000 options to the Reporting Person (the "May 2026 Option Grant"), subject to shareholder approval. The options are exercisable for shares of common stock of the Issuer at an exercise price of $5.10 per share, and vest in five equal installments subject to the Issuer's common stock meeting the following volume weighted average price ("VWAP") thresholds: 20% following VWAP of $7.65; 20% following VWAP of $10.20; 20% following VWAP of $12.75; 20% following VWAP of $15.30; and 20% following VWAP of $17.85. On July 20, 2026, the shareholders approved the May 2026 Option Grant. On July 20, 2026, the Reporting Person exercised pre-funded warrants into 5,954,743 common shares at an exercise price of $0.0001 per share.Item 4 of the SCHEDULE 13D/A filed 2026-07-21

Heinrich Michael

.Item 4 of the SCHEDULE 13D/A filed 2026-07-21

Timeline

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Questions about who owns ZeroStack Corp.

Who owns ZeroStack Corp.?

On this page, 6 holders' latest ownership filings report 5% or more of ZeroStack Corp.: Reis-Faria Daniel (37.5%, Schedule 13D/A, filed 2026-07-21), Heinrich Michael (30.2%, Schedule 13D/A, filed 2026-07-21), Starke Clifford (17.1%, Schedule 13D/A, filed 2025-07-21), Alexander Pack (8.6%, Schedule 13G, filed 2026-10-19) and Puple AI Inc. (8.3%, Schedule 13G, filed 2026-09-02); 1 more is listed above.

Who are the largest shareholders of ZeroStack Corp.?

By the share each holder's latest filing reports, the largest holders of ZeroStack Corp. on this page are Reis-Faria Daniel (37.5%), Heinrich Michael (30.2%) and Starke Clifford (17.1%).

When did Reis-Faria Daniel buy into ZeroStack Corp.?

The filings give report dates, not purchase dates. The earliest filing from Reis-Faria Daniel on this page is the Schedule 13D, filed 2025-10-10, reporting 89.3%; its latest, Schedule 13D/A filed 2026-07-21, reports 37.5%.

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%); 15 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.

Also on the record for ZeroStack Corp.

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ZeroStack Corp.: every filing and event

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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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