As of September 09, 2026, the three largest insider holders of GCTK are Drew Sycoff (Director, 2.95Mn shares), Andrew K Balo (Director, 0 shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Drew Sycoff | Director, TenPercentOwner | 2,951,258 | 0 | 2,951,258 | 100.0% | 24 Apr, 2024 |
| 2 | Andrew K Balo | Director | 0 | 0 | 0 | 0.0% | 28 Mar, 2025 |
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 |
|---|---|---|---|---|---|---|---|---|
| 26 Mar, 2025 | Andrew K Balo | Director | Acquired A | 4,490 | $0.00 | $0 | 0 | Direct |
| 01 Jul, 2024 | Paul Goode | Chief Executive Officer | Acquired P | 42,000 | — | — | 42,000 | Direct |
| 01 Jul, 2024 | Drew Sycoff | Director, TenPercentOwner | Acquired P | 138,000 | — | — | 138,000 | Direct |
| 01 Jul, 2024 | Paul Goode | Chief Executive Officer | Acquired P | 42,000 | — | — | 42,000 | Direct |
| 01 Jul, 2024 | Paul Goode | Chief Executive Officer | Acquired P | 42,000 | — | — | 42,000 | Direct |
| 01 Jul, 2024 | Drew Sycoff | Director, TenPercentOwner | Acquired P | 138,000 | — | — | 138,000 | Direct |
| 01 Jul, 2024 | Drew Sycoff | Director, TenPercentOwner | Acquired P | 138,000 | — | — | 138,000 | Direct |
| 22 Apr, 2024 | Drew Sycoff | Director, TenPercentOwner | Acquired P | 182,540 | $1.26 | $230.00K | 2,951,258 | Direct |
| 22 Apr, 2024 | Drew Sycoff | Director, TenPercentOwner | Acquired P | 182,540 | $1.26 | $230.00K | 2,951,258 | Direct |
| 22 Apr, 2024 | Drew Sycoff | Director, TenPercentOwner | Acquired P | 182,540 | $1.26 | $230.00K | 2,951,258 | Direct |
| 26 Jun, 2017 | David Podwalski | Chief Commercial Officer | Acquired A | 290,585 | $0.00 | $0 | 290,585 | Direct |
| 26 Jun, 2017 | David Podwalski | Chief Commercial Officer | Acquired A | 290,585 | $0.00 | $0 | 290,585 | Direct |
| 26 Jun, 2017 | David Podwalski | Chief Commercial Officer | Acquired A | 290,585 | $0.00 | $0 | 290,585 | Direct |
| 01 Jun, 2017 | Leslie Seff | Director | Acquired A | 22,727 | $0.00 | $0 | 22,727 | Direct |
| 01 Jun, 2017 | Leslie Seff | Director | Acquired A | 22,727 | $0.00 | $0 | 22,727 | Direct |
| 01 Jun, 2017 | Michael Hauck | Director | Acquired A | 14,894 | $0.00 | $0 | 14,894 | Direct |
| 01 Jun, 2017 | Revan Schwartz | Director | Acquired A | 22,727 | $0.00 | $0 | 22,727 | Direct |
| 01 Jun, 2017 | Leslie Seff | Director | Acquired A | 22,727 | $0.00 | $0 | 22,727 | Direct |
| 01 Jun, 2017 | Revan Schwartz | Director | Acquired A | 22,727 | $0.00 | $0 | 22,727 | Direct |
| 01 Jun, 2017 | Robert Fischell | Director | Acquired A | 22,727 | $0.00 | $0 | 22,727 | Direct |