ZSTK's three largest insider shareholders as of July 26, 2026 are Juan Carlos Gomez Roa (Director, 2.04Mn shares), Clifford Starke (Ceo, 906.85K shares), Clifford Starke (Ceo, 565.71K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Harold Wolkin | - | 25,000 | 0 | 11 Sep, 2024 |
| Kevin Taylor | Chairman | 124,186 | 0 | 14 Nov, 2023 |
| Brandon Konigsberg | - | 100,000 | 0 | 21 Mar, 2023 |
| Juan Carlos Gomez Roa | - | 2,042,509 | 0 | 21 Mar, 2023 |
| Beverley Richardson | - | 150,000 | 0 | 21 Mar, 2023 |
| Dany Vaiman | Cfo | 170,850 | 0 | 15 Nov, 2023 |
| Clifford Starke | Ceo | 906,846 | 0 | 16 Dec, 2024 |
| Marc Mastronardi | - | 160,000 | 0 | 21 Mar, 2023 |
| John Timothy Leslie | - | 138,574 | 0 | 21 Mar, 2023 |
| Edward Woo | - | 134,698 | 0 | 16 Dec, 2024 |
| Thomas Solomon | - | 35,766 | 0 | 15 Nov, 2023 |
| Sammy Dorf | Executive Chairman | 250,000 | 0 | 16 Dec, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 31 Mar, 2026 | Michael Heinrich | Convertible Promissory Note | D | 4,902,220 | - | 0 | I | J |
| 19 Dec, 2025 | Daniel Reis-Faria | Employee Stock Option (Right to Buy) | A | 471,208 | $0.00 | 471,208 | D | A |
| 19 Dec, 2025 | Dany Vaiman | Employee Stock Option (Right to Buy) | A | 235,604 | $0.00 | 235,604 | D | A |
| 19 Dec, 2025 | Daniel Reis-Faria | Employee Stock Option (Right to Buy) | A | 471,208 | $0.00 | 471,208 | D | A |
| 19 Dec, 2025 | Dany Vaiman | Employee Stock Option (Right to Buy) | A | 235,604 | $0.00 | 235,604 | D | A |
| 19 Dec, 2025 | Dany Vaiman | Employee Stock Option (Right to Buy) | A | 235,604 | $0.00 | 235,604 | D | A |
| 19 Dec, 2025 | Daniel Reis-Faria | Employee Stock Option (Right to Buy) | A | 471,208 | $0.00 | 471,208 | D | A |
| 19 Dec, 2025 | Michael Heinrich | Director Stock Option (Right to Buy) | A | 471,208 | $0.00 | 471,208 | D | A |
| 23 Oct, 2025 | Michael Heinrich | Convertible Promissory Note | A | 4,902,220 | - | 4,902,220 | I | X |
| 22 Oct, 2025 | Michael John Brown | Deferred Share Units (DSUs) | A | 7,468 | $0.00 | 94,421 | D | A |
| 09 Oct, 2025 | Daniel Reis-Faria | Pre-Funded Token Warrants | A | 5,954,743 | $25.19 | 5,954,743 | D | P |
| 09 Oct, 2025 | Daniel Reis-Faria | Pre-Funded Token Warrants | A | 5,954,743 | $25.19 | 5,954,743 | D | P |
| 09 Oct, 2025 | Daniel Reis-Faria | Pre-Funded Token Warrants | A | 5,954,743 | $25.19 | 5,954,743 | D | P |
| 30 Jun, 2025 | Harold Wolkin | Stock Appreciation Rights (SARs) | D | 30,000 | - | 0 | D | D |
| 30 Jun, 2025 | Dany Vaiman | Stock Appreciation Rights (SARs) | D | 342,888 | - | 0 | D | D |
| 30 Jun, 2025 | Harold Wolkin | Stock Appreciation Rights (SARs) | D | 30,000 | - | 0 | D | D |
| 30 Jun, 2025 | Clifford Starke | Stock Appreciation Rights (SARs) | D | 1,028,665 | - | 0 | D | D |
| 30 Jun, 2025 | Dany Vaiman | Stock Appreciation Rights (SARs) | D | 342,888 | - | 0 | D | D |
| 30 Jun, 2025 | Manfred Leventhal | Stock Appreciation Rights (SARs) | D | 5,000 | - | 0 | D | D |
| 30 Jun, 2025 | Manfred Leventhal | Stock Appreciation Rights (SARs) | D | 5,000 | - | 0 | D | D |