As of September 29, 2026, Helio's top three insider holders are Paul Stuart Turin (Chief Engineer, 7.73Mn shares), Gregory Townsend Delory (Cto, 5.52Mn shares), Mark Harry Knauf (Chief Financial Officer, 380 shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Paul Stuart Turin | Chief Engineer | 7,730,239 | 0 | 7,730,239 | 58.3% | 04 Dec, 2025 |
| 2 | Gregory Townsend Delory | Cto | 5,522,780 | 0 | 5,522,780 | 41.7% | 23 Jun, 2026 |
| 3 | Mark Harry Knauf | Chief Financial Officer | 380 | 0 | 380 | 0.0% | 18 Sep, 2026 |
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 |
|---|---|---|---|---|---|---|---|---|
| 16 Sep, 2026 | Mark Harry Knauf | Chief Financial Officer | Acquired P | 5,166 | $1.55 | $8.01K | 5,166 | Direct |
| 17 Sep, 2026 | Mark Harry Knauf | Chief Financial Officer | Acquired P | 10,700 | $1.46 | $15.62K | 10,700 | Direct |
| 18 Sep, 2026 | Mark Harry Knauf | Chief Financial Officer | Acquired P | 380 | $1.33 | $505 | 380 | Direct |
| 22 Jun, 2026 | Gregory Townsend Delory | Cto | Disposed J | 33,000 | — | — | 5,522,780 | Direct |
| 02 Jun, 2026 | Gregory Townsend Delory | Cto | Disposed J | 15,000 | — | — | 5,585,780 | Direct |
| 02 Jun, 2026 | Gregory Townsend Delory | Cto | Disposed J | 12,500 | — | — | 5,573,280 | Direct |
| 02 Jun, 2026 | Gregory Townsend Delory | Cto | Disposed J | 2,500 | — | — | 5,570,780 | Direct |
| 02 Jun, 2026 | Gregory Townsend Delory | Cto | Disposed J | 5,000 | — | — | 5,565,780 | Direct |
| 02 Jun, 2026 | Gregory Townsend Delory | Cto | Disposed J | 10,000 | — | — | 5,555,780 | Direct |
| 28 Apr, 2026 | Gregory Townsend Delory | Chief Technology Officer | Acquired M | 149,979 | — | — | 5,600,780 | Direct |
| 02 Dec, 2025 | Gregory Townsend Delory | Ceo And President | Acquired M | 2,204,561 | — | — | 5,490,801 | Direct |
| 02 Dec, 2025 | Paul Stuart Turin | Chief Engineer | Acquired M | 5,193,898 | — | — | 7,730,239 | Direct |
| 04 Dec, 2025 | Gregory Townsend Delory | Ceo And President | Disposed J | 20,000 | — | — | 5,470,801 | Direct |
| 04 Dec, 2025 | Gregory Townsend Delory | Ceo And President | Disposed J | 20,000 | — | — | 5,450,801 | Direct |