Comparable stake leader
Daniel Reis-Faria
SEC ownership of ZeroStack Corp.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001790169.
Disclosed value leader
Daniel Reis-Faria
Comparable rows
9/37
Latest evidence
19 Aug 2026
- Public ticker
- ZSTK on Nasdaq
- Parsed ownership sources
-
3/4/5, 13D/G, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Daniel Reis-Faria
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
9 of 37
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Daniel Reis-Faria
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
19 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001790169
- Issuer location
- Dallas, TX
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of ZeroStack Corp. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Daniel Reis-Faria
Disclosed value leader
Daniel Reis-Faria
Comparable rows
9/37
Latest evidence
19 Aug 2026
3/4/5
13D/G
13F
Lead comparable stake: 38%
28 rows are not safely comparable across share classes.
13D/G row: Daniel Reis-Faria
Showing 1-8 of 37 holder rows.
Quick read
Daniel Reis-Faria leads the comparable SEC ownership view at 38%.
9 of 37 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Daniel Reis-Faria's linked filing trail.
Comparable ownership
Top 5
Daniel Reis-Faria
38%
Michael Heinrich
30%
Clifford Starke
17%
Hack VC Management, LLC
8.6%
BLOCKCAT PTE. LTD.
8.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 37 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Daniel Reis-Faria |
3/4/5
13D/G
CEO, Director · Reis-Faria Daniel
|
38%
Reported 13D/G
· 20 Jul 2026
|
$186,799,691
6,454,743 shares
mixed-class rows
|
— | 20 Jul 2026 |
| Michael Heinrich |
3/4/5
13D/G
Executive Chairman, Director · Heinrich Michael
|
30%
Reported 13D/G
· 20 Jul 2026
|
$28,480,993
5,579,783 shares
mixed-class rows
|
— | 20 Jul 2026 |
| Clifford Starke |
3/4/5
13D/G
CEO, Director · Starke Clifford
|
17%
Reported 13D/G
· 09 May 2025
|
$2,134,557
2,822,221 shares
mixed-class rows
|
— | 30 Jun 2025 |
| Hack VC Management, LLC |
13D/G
Alexander Pack
|
8.6%
Reported 13D/G
· 20 Jul 2026
|
$9,294,542
1,920,360 shares
|
$0 | 20 Jul 2026 |
| BLOCKCAT PTE. LTD. |
13D/G
|
8.3%
Reported 13D/G
· 19 Aug 2026
|
$3,185,000
1,750,000 shares
|
$0 | 19 Aug 2026 |
| Puple AI Inc. |
13D/G
|
8.3%
Reported 13D/G
· 19 Aug 2026
|
$3,185,000
1,750,000 shares
|
$0 | 19 Aug 2026 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC |
13D/G
|
4.4%
Reported 13D/G
· 30 Jun 2025
|
$726,768
1,038,240 shares
|
$0 | 30 Jun 2025 |
| Dany Vaiman |
3/4/5
13D/G
CFO · Vaiman Dany
|
2.9%
Reported 13D/G
· 20 Jul 2026
|
—
622,500 shares
mixed-class rows
|
— | 20 Jul 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$7,570.
Buys
$0
Insiders: 0
Sells
$7,570
Insiders: 1
Net
-$7,570
Shares: -1,000
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 1,000
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 1,000 | $0 | $7,570 | -$7,570 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 26 reporting-owner rows connected to ZeroStack Corp.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
26
Largest Forms 3/4/5 holder
Daniel Reis-Faria
Net 12M change
-$7.57K
Full value: -$7,570 · USD · 12-month changeLatest report
19 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Daniel Reis-Faria | CEO, Director | $186,799,691 | Mixed | 20 Jul 2026 | ||
| Michael Heinrich | Executive Chairman, Director | $28,480,993 | Mixed | 20 Jul 2026 | ||
| Juan Carlos Gomez Roa | Director | $3,880,767 | Mixed | 17 Mar 2023 | ||
| Luis Merchan | CEO & Chairman of the Board, Director | $3,752,783 | Mixed | 01 Jan 2023 | ||
| Clifford Starke | CEO, Director | $2,134,557 | Mixed | 30 Jun 2025 | ||
| Hussein Rakine | Director | $662,625 | Mixed | 25 Jun 2023 | ||
| Jason Warnock | Cco | $638,022 | Mixed | 01 Jan 2023 | ||
| Matthew S. Cohen | General Counsel | $626,259 | Mixed | 18 May 2023 | ||
| Jessie Casner | Cmo | $417,417 | Mixed | 01 Jan 2023 | ||
| Marc Mastronardi | Director | $304,000 | Mixed | 17 Mar 2023 | ||
| Beverley Richardson | Director | $285,000 | Mixed | 17 Mar 2023 | ||
| Kevin Taylor | Chairman, Director | $263,598 | Mixed | 15 Nov 2023 | ||
| John Timothy Leslie | Director | $263,291 | Mixed | 17 Mar 2023 | ||
| Sammy Dorf | Executive Chairman, Director | $237,500 | Mixed | 15 Dec 2024 | ||
| Brandon Konigsberg | Director | $190,000 | Mixed | 17 Mar 2023 | ||
| Edward Woo | Director | $129,883 | Mixed | 05 May 2026 | ||
| Thomas Solomon | Director | $67,955 | Mixed | 15 Nov 2023 | ||
| Harold Wolkin | Director | $24,475 | Filing P/S | 30 Jun 2025 | ||
| Rudy Rong | President | $0 | -$7,570 | -100% | Mixed | 19 Aug 2026 |
| Elshad Garayev | Cfo | Mixed | 01 Jan 2023 |
Recent insider transactions for ZeroStack Corp.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Rudy Rong | ZSTK | Common Shares | Sale | -100% | -$7,570 | $7.57 | -1,000 | 0 | 19 Aug 2026 | Direct |
| Michael Heinrich | ZSTK | Common Shares | Purchase | 4,608,575 | 4,608,575 | 20 Jul 2026 | Held by Zero Gravity Labs, Inc. | |||
| Michael Heinrich | ZSTK | Employee Stock Option (Right to Buy) | Award | 500,000 | 500,000 | 20 Jul 2026 | Direct | |||
| Daniel Reis-Faria | ZSTK | Common Shares | Exercise of in-the-money or at-the-money derivative security | 5,954,743 | 5,954,743 | 20 Jul 2026 | Direct | |||
| Daniel Reis-Faria | ZSTK | Pre-Funded Token Warrants | Exercise of in-the-money or at-the-money derivative security | -100% | -5,954,743 | 0 | 20 Jul 2026 | Direct | ||
| Daniel Reis-Faria | ZSTK | Employee Stock Option (Right to Buy) | Award | 500,000 | 500,000 | 20 Jul 2026 | Direct | |||
| Dany Vaiman | ZSTK | Employee Stock Option ("Right to Buy") | Award | 250,000 | 250,000 | 20 Jul 2026 | Direct | |||
| Laurence Zeifman | ZSTK | Director Stock Option ("Right to Buy") | Award | 28,000 | 28,000 | 05 May 2026 | Direct | |||
| Edward Woo | ZSTK | Director Stock Option ("Right to Buy") | Award | 35,000 | 35,000 | 05 May 2026 | Direct | |||
| Manfred Leventhal | ZSTK | Director Stock Option ("Right to Buy") | Award | 35,000 | 35,000 | 05 May 2026 | Direct | |||
| Michael Heinrich | ZSTK | Convertible Promissory Note | Other | -100% | -4,902,220 | 0 | 31 Mar 2026 | Held by Zero Gravity Labs Inc., a corporation owned and controlled by the Reporting Person | ||
| Dany Vaiman | FLGC | Employee Stock Option ("Right to Buy") | Award | 235,604 | 235,604 | 19 Dec 2025 | Direct | |||
| Daniel Reis-Faria | FLGC | Employee Stock Option (Right to Buy) | Award | 471,208 | 471,208 | 19 Dec 2025 | Direct | |||
| Michael Heinrich | FLGC | Director Stock Option (Right to Buy) | Award | 471,208 | 471,208 | 19 Dec 2025 | Direct |
* marks a reported price that did not pass the local price check.