Quick Takeaways
- ZSTK - ZeroStack Corp. has 25 insiders with reported activity on this page.
- Net insider value flow over the last year: +$149,999,381.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
Insider Transactions Reported by 25 Insiders of ZeroStack Corp.
- Symbol
- ZSTK on Nasdaq
- Location
- Toronto
What Changed
- Buy value: $149,999,381; sell value: $0.
- Net share flow: +5,954,743.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsNet insider flow leans to buying over the last 12 months. Net value: +$149,999,381.
Buys
$149,999,381
Shares: 5,954,743
Insiders: 1
Sells
$0
Shares: 0
Insiders: 0
Net
+$149,999,381
Shares: +5,954,743
Insiders: 1
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 5,954,743 | 0 | $149,999,381 | $0 | +$149,999,381 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
ZeroStack Corp. executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Daniel Reis-Faria | CEO, Director | $149,999,380 | +$149,999,381 | +100% | Filing P/S | 19 Dec 2025 |
| 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 | 15 Dec 2024 | ||
| Thomas Solomon | Director | $67,955 | Mixed | 15 Nov 2023 | ||
| Harold Wolkin | Director | $24,475 | Filing P/S | 30 Jun 2025 | ||
| Laurence Zeifman | Director | Mixed | 06 Jan 2026 | |||
| Dany Vaiman | Cfo | Mixed | 19 Dec 2025 | |||
| Brendan Cahill | Director | Mixed | 02 May 2024 | |||
| Annabelle Manalo Morgan | Director | Mixed | 01 Jan 2023 | |||
| Elshad Garayev | Cfo | Mixed | 01 Jan 2023 | |||
| Manfred Leventhal | Director | Mixed | 30 Jun 2025 | |||
| Michael John Brown | Director | Mixed | 22 Oct 2025 | |||
| Michael Heinrich | Executive Chairman, Director | Mixed | 31 Mar 2026 |
Top shareholders of ZeroStack Corp. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Daniel Reis-Faria |
3/4/5
13D/G
|
CEO, Director · Reis-Faria Daniel |
88%
from 13D/G
|
6,425,951
mixed-class rows
|
$149,999,380 | +$149,999,381 | 19 Dec 2025 | |
| Juan Carlos Gomez Roa |
3/4/5
|
Director |
—
class O/S missing
|
2,042,509
|
$3,880,767 | — | 17 Mar 2023 | |
| Luis Merchan |
3/4/5
|
CEO & Chairman of the Board, Director |
—
class O/S missing
|
1,975,149
|
$3,752,783 | — | 01 Jan 2023 | |
| Clifford Starke |
3/4/5
13D/G
|
CEO, Director · Starke Clifford |
17%
from 13D/G
|
2,822,221
mixed-class rows
|
$2,134,557 | — | 30 Jun 2025 | |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC |
13D/G
|
— |
4.4%
|
1,038,240
|
$726,768 | $0 | 30 Jun 2025 | |
| Hussein Rakine |
3/4/5
|
Director |
—
class O/S missing
|
348,750
|
$662,625 | — | 25 Jun 2023 | |
| Jason Warnock |
3/4/5
|
CCO |
—
class O/S missing
|
335,801
|
$638,022 | — | 01 Jan 2023 | |
| Matthew S. Cohen |
3/4/5
|
General Counsel |
—
class O/S missing
|
329,610
|
$626,259 | — | 18 May 2023 | |
| Jessie Casner |
3/4/5
|
CMO |
—
class O/S missing
|
219,693
|
$417,417 | — | 01 Jan 2023 | |
| Marc Mastronardi |
3/4/5
|
Director |
—
class O/S missing
|
160,000
|
$304,000 | — | 17 Mar 2023 | |
| Beverley Richardson |
3/4/5
|
Director |
—
class O/S missing
|
150,000
|
$285,000 | — | 17 Mar 2023 | |
| Kevin Taylor |
3/4/5
|
Chairman, Director |
—
class O/S missing
|
138,736
|
$263,598 | — | 15 Nov 2023 | |
| John Timothy Leslie |
3/4/5
|
Director |
—
class O/S missing
|
138,574
|
$263,291 | — | 17 Mar 2023 | |
| Sammy Dorf |
3/4/5
|
Executive Chairman, Director |
—
class O/S missing
|
250,000
|
$237,500 | — | 15 Dec 2024 | |
| Empery Asset Management, LP |
13D/G
|
— |
1.9%
|
374,065
|
$224,439 | -$331,378 | 31 Mar 2025 | |
| Brandon Konigsberg |
3/4/5
|
Director |
—
class O/S missing
|
100,000
|
$190,000 | — | 17 Mar 2023 | |
| Edward Woo |
3/4/5
|
Director |
—
class O/S missing
|
136,719
|
$129,883 | — | 15 Dec 2024 | |
| Thomas Solomon |
3/4/5
|
Director |
—
class O/S missing
|
35,766
|
$67,955 | — | 15 Nov 2023 | |
| Harold Wolkin |
3/4/5
|
Director |
—
mixed-class rows
|
55,000
mixed-class rows
|
$24,475 | — | 30 Jun 2025 | |
| Dany Vaiman |
3/4/5
13D/G
|
CFO · Vaiman Dany |
24%
from 13D/G
|
608,104
mixed-class rows
|
— | — | 19 Dec 2025 | |
| Michael Heinrich |
3/4/5
13D/G
|
Executive Chairman, Director · Heinrich Michael |
10%
from 13D/G
|
471,208
|
— | — | 31 Mar 2026 | |
| Michael John Brown |
3/4/5
|
Director |
—
class O/S missing
|
94,421
|
— | — | 22 Oct 2025 | |
| Manfred Leventhal |
3/4/5
|
Director |
—
class O/S missing
|
5,000
|
— | — | 30 Jun 2025 |
Recent Insider Transactions by Companies or Individuals for ZeroStack Corp.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |||
| Michael Heinrich | FLGC | Convertible Promissory Note | Exercise of in-the-money or at-the-money derivative security | 4,902,220 | 4,902,220 | 23 Oct 2025 | Held by Zero Gravity Labs Inc., a corporation owned and controlled by the Reporting Person | |||
| Michael John Brown | FLGC | Deferred Share Units ("DSUs") | Award | 8.59% | 7,468 | 94,421 | 22 Oct 2025 | Direct | ||
| Daniel Reis-Faria | FLGC | Pre-Funded Token Warrants | Purchase | $149,999,381 | $25.19 | 5,954,743 | 5,954,743 | 09 Oct 2025 | Direct | |
| Harold Wolkin | FLGC | Stock Appreciation Rights ("SARs") | Award | 30,000 | 30,000 | 30 Jun 2025 | Direct | |||
| Harold Wolkin | FLGC | Stock Appreciation Rights ("SARs") | Disposed to Issuer | -100% | -30,000 | 0 | 30 Jun 2025 | Direct | ||
| Manfred Leventhal | FLGC | Stock Appreciation Rights ("SARs") | Award | 5,000 | 5,000 | 30 Jun 2025 | Direct | |||
| Manfred Leventhal | FLGC | Stock Appreciation Rights ("SARs") | Disposed to Issuer | -100% | -5,000 | 0 | 30 Jun 2025 | Direct | ||
| Clifford Starke | FLGC | Stock Appreciation Rights ("SARs") | Award | 1,603,984 | 1,028,665 | 30 Jun 2025 | Direct | |||
| Clifford Starke | FLGC | Stock Appreciation Rights ("SARs") | Disposed to Issuer | -100% | -1,603,984 | 0 | 30 Jun 2025 | Direct | ||
| Dany Vaiman | FLGC | Stock Appreciation Rights ("SARs") | Award | 907,161 | 372,500 | 30 Jun 2025 | Direct | |||
| Dany Vaiman | FLGC | Stock Appreciation Rights ("SARs") | Disposed to Issuer | -100% | -907,161 | 0 | 30 Jun 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.