In the last 12 months, insiders at ZeroStack made open-market purchases of $3.48 million (4.61Mn shares) and open-market sales of $7,570 (1K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Daniel Reis-Faria | Ceo | 5,954,743 | 0 | 5,954,743 | 56.1% | 20 Jul, 2026 |
| 2 | Michael Heinrich | Executive Chairman | 0 | 4,608,575 | 4,608,575 | 43.4% | 20 Jul, 2026 |
| 3 | Clifford Starke | Ceo | 23,252 | 0 | 23,252 | 0.2% | 16 Dec, 2024 |
| 4 | Sammy Dorf | Executive Chairman | 6,410 | 0 | 6,410 | 0.1% | 16 Dec, 2024 |
| 5 | Dany Vaiman | Cfo | 4,381 | 0 | 4,381 | 0.0% | 15 Nov, 2023 |
| 6 | Edward Woo | Director | 3,454 | 0 | 3,454 | 0.0% | 16 Dec, 2024 |
| 7 | Kevin Taylor | Chairman | 3,184 | 0 | 3,184 | 0.0% | 14 Nov, 2023 |
| 8 | Juan Carlos Gomez Roa | Director | 2,619 | 0 | 2,619 | 0.0% | 21 Mar, 2023 |
| 9 | Thomas Solomon | Director | 917 | 0 | 917 | 0.0% | 15 Nov, 2023 |
| 10 | Harold Wolkin | Director | 641 | 0 | 641 | 0.0% | 11 Sep, 2024 |
| 11 | Marc Mastronardi | Director | 205 | 0 | 205 | 0.0% | 21 Mar, 2023 |
| 12 | Beverley Richardson | Director | 192 | 0 | 192 | 0.0% | 21 Mar, 2023 |
| 13 | John Timothy Leslie | Director | 178 | 0 | 178 | 0.0% | 21 Mar, 2023 |
| 14 | Brandon Konigsberg | Director | 128 | 0 | 128 | 0.0% | 21 Mar, 2023 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 19 Aug, 2026 | Rudy Rong | President | Disposed S | 1,000 | $7.57 | $7.57K | 0 | Direct |
| 20 Jul, 2026 | Michael Heinrich | Executive Chairman | Acquired P | 4,608,575 | $0.75 | $3.48Mn | 4,608,575 | Indirect |
| 20 Jul, 2026 | Daniel Reis-Faria | Ceo | Acquired X | 5,954,743 | $0.00 | $595 | 5,954,743 | Direct |
| 20 Jul, 2026 | Dany Vaiman | Cfo | Acquired A | 250,000 | $0.00 | $0 | 250,000 | Direct |
| 20 Jul, 2026 | Michael Heinrich | Executive Chairman | Acquired A | 500,000 | $0.00 | $0 | 500,000 | Direct |
| 20 Jul, 2026 | Daniel Reis-Faria | Ceo | Acquired A | 500,000 | $0.00 | $0 | 500,000 | Direct |
| 20 Jul, 2026 | Daniel Reis-Faria | Ceo | Disposed X | 5,954,743 | $25.19 | $150.00Mn | 0 | Direct |
| 05 May, 2026 | Laurence Zeifman | Director | Acquired A | 28,000 | $0.00 | $0 | 28,000 | Direct |
| 05 May, 2026 | Edward Woo | Director | Acquired A | 35,000 | $0.00 | $0 | 35,000 | Direct |
| 05 May, 2026 | Manfred Leventhal | Director | Acquired A | 35,000 | $0.00 | $0 | 35,000 | Direct |
| 31 Mar, 2026 | Michael Heinrich | Executive Chairman | Disposed J | 4,902,220 | — | — | 0 | Indirect |
| 19 Dec, 2025 | Daniel Reis-Faria | Ceo | Acquired A | 471,208 | $0.00 | $0 | 471,208 | Direct |
| 19 Dec, 2025 | Michael Heinrich | Executive Chairman | Acquired A | 471,208 | $0.00 | $0 | 471,208 | Direct |
| 19 Dec, 2025 | Dany Vaiman | Cfo | Acquired A | 235,604 | $0.00 | $0 | 235,604 | Direct |
| 23 Oct, 2025 | Michael Heinrich | Executive Chairman | Acquired X | 4,902,220 | — | — | 4,902,220 | Indirect |
| 22 Oct, 2025 | Michael John Brown | Director | Acquired A | 7,468 | $0.00 | $0 | 94,421 | Direct |
| 09 Oct, 2025 | Daniel Reis-Faria | Ceo | Acquired P | 5,954,743 | $25.19 | $150.00Mn | 5,954,743 | Direct |
| 30 Jun, 2025 | Manfred Leventhal | Director | Disposed D | 5,000 | — | — | 0 | Direct |
| 30 Jun, 2025 | Harold Wolkin | Director | Disposed D | 30,000 | — | — | 0 | Direct |
| 30 Jun, 2025 | Dany Vaiman | Cfo | Disposed D | 342,888 | — | — | 0 | Direct |