ZeroStack Corp. has 14 Schedule 13D or 13G filings on record since 2025-07-21. 5 holders' latest filing reports 5% or more of common shares, no par value. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Reis-Faria Daniel | 37.5% | 6,925,951 | SCHEDULE 13D/A, 2026-07-21 | 2026-07-20 |
| Heinrich Michael | 30.2% | 5,579,783 | SCHEDULE 13D/A, 2026-07-21 | 2026-07-20 |
| Starke Clifford | 17.1% | 3,850,886 | SCHEDULE 13D/A, 2025-07-21 | 2025-05-09 |
| Puple AI Inc. | 8.3% | 1,750,000 | SCHEDULE 13G, 2026-09-02 | 2026-08-19 |
| Blockcat Pte. Ltd. | 8.3% | 1,750,000 | SCHEDULE 13G, 2026-09-04 | 2026-08-19 |
| Highbridge Capital Management, LLC | 4.4% | 1,038,240 | SCHEDULE 13G/A, 2025-08-14 | 2025-06-30 |
| Vaiman Dany | 2.9% | 513,249 | SCHEDULE 13D/A, 2026-07-21 | 2026-07-20 |
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
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-21 | Vaiman Dany | 4.8% | SCHEDULE 13D/A |
| 2025-07-21 | Starke Clifford | 17.1% | SCHEDULE 13D/A |
| 2025-08-14 | Highbridge Capital Management, LLC | 4.4% | SCHEDULE 13G/A |
| 2025-10-10 | Reis-Faria Daniel | 89.3% | SCHEDULE 13D |
| 2025-10-27 | Heinrich Michael | 87% | SCHEDULE 13D |
| 2025-12-23 | Reis-Faria Daniel | 88.3% | SCHEDULE 13D/A |
| 2025-12-23 | Vaiman Dany | 23.8% | SCHEDULE 13D/A |
| 2025-12-23 | Heinrich Michael | 86.4% | SCHEDULE 13D/A |
| 2026-04-02 | Heinrich Michael | 10% | SCHEDULE 13D/A |
| 2026-07-21 | Heinrich Michael | 30.2% | SCHEDULE 13D/A |
| 2026-07-21 | Vaiman Dany | 2.9% | SCHEDULE 13D/A |
| 2026-07-21 | Reis-Faria Daniel | 37.5% | SCHEDULE 13D/A |
| 2026-09-02 | Puple AI Inc. | 8.3% | SCHEDULE 13G |
| 2026-09-04 | Blockcat Pte. Ltd. | 8.3% | SCHEDULE 13G |
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.