As of September 09, 2026, the three largest insider holders of STI are Henry Ikezi (TenPercentOwner, 3.51Mn shares), Graphene Group, Inc. Global (TenPercentOwner, 1.57Mn shares), Karin-Joyce Tjon (Director, 53.05K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Henry Ikezi | TenPercentOwner | 0 | 3,507,313 | 3,507,313 | 67.5% | 11 Jun, 2026 |
| 2 | Graphene Group, Inc. Global | TenPercentOwner | 1,569,695 | 0 | 1,569,695 | 30.2% | 05 Jun, 2026 |
| 3 | Karin-Joyce Tjon | Director | 53,053 | 0 | 53,053 | 1.0% | 03 Sep, 2026 |
| 4 | John Linzy Davis | Director | 52,853 | 0 | 52,853 | 1.0% | 03 Sep, 2026 |
| 5 | Mark N Schwartz | Director | 4,296 | 0 | 4,296 | 0.1% | 03 Sep, 2026 |
| 6 | Kimi L Ellen | Director | 4,296 | 0 | 4,296 | 0.1% | 03 Sep, 2026 |
| 7 | Dante W Robinson | Director | 4,296 | 0 | 4,296 | 0.1% | 03 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 |
|---|---|---|---|---|---|---|---|---|
| 03 Jun, 2026 | Henry Ikezi | TenPercentOwner | Acquired P | 1,000 | $4.85 | $4.85K | 690,761 | Indirect |
| 04 Jun, 2026 | Henry Ikezi | TenPercentOwner | Acquired P | 23,000 | $24.66 | $567.12K | 713,761 | Indirect |
| 04 Jun, 2026 | Henry Ikezi | TenPercentOwner | Disposed S | 188,951 | $23.43 | $4.43Mn | 524,810 | Indirect |
| 05 Jun, 2026 | Henry Ikezi | TenPercentOwner | Disposed S | 13,500 | $44.89 | $605.99K | 511,310 | Indirect |
| 05 Jun, 2026 | Henry Ikezi | TenPercentOwner | Disposed J | 214,037 | $0.00 | $0 | 2,544,329 | Indirect |
| 05 Jun, 2026 | Henry Ikezi | TenPercentOwner | Acquired J | 214,037 | $0.00 | $0 | 214,037 | Indirect |
| 05 Jun, 2026 | Henry Ikezi | TenPercentOwner | Acquired P | 2,000 | $36.00 | $71.99K | 216,037 | Indirect |
| 05 Jun, 2026 | Henry Ikezi | TenPercentOwner | Disposed S | 192,437 | $37.31 | $7.18Mn | 23,600 | Indirect |
| 05 Jun, 2026 | Henry Ikezi | TenPercentOwner | Acquired M | 214,037 | $3.10 | $662.47K | 237,637 | Indirect |
| 05 Jun, 2026 | Henry Ikezi | TenPercentOwner | Acquired M | 246,664 | $0.00 | $0 | 0 | Indirect |
| 04 Jun, 2026 | Graphene Group, Inc. Global | TenPercentOwner | Disposed S | 175,000 | $21.09 | $3.69Mn | 1,569,695 | Direct |
| 11 Dec, 2025 | Graphene Group, Inc. Global | TenPercentOwner | Disposed S | 568 | $7.87 | $4.47K | 1,745,445 | Direct |
| 12 Dec, 2025 | Graphene Group, Inc. Global | TenPercentOwner | Disposed S | 750 | $7.87 | $5.90K | 1,744,695 | Direct |
| 24 Nov, 2025 | Graphene Group, Inc. Global | TenPercentOwner | Disposed S | 1,865 | $10.89 | $20.30K | 1,754,148 | Direct |
| 25 Nov, 2025 | Graphene Group, Inc. Global | TenPercentOwner | Disposed S | 4,910 | $10.53 | $51.69K | 1,749,238 | Direct |
| 26 Nov, 2025 | Graphene Group, Inc. Global | TenPercentOwner | Disposed S | 3,225 | $10.39 | $33.52K | 1,746,013 | Direct |
| 09 Oct, 2025 | Karin-Joyce Tjon | Director | Acquired A | 40,000 | $0.00 | $0 | 40,000 | Direct |
| 09 Oct, 2025 | John Linzy Davis | Director | Acquired A | 40,000 | $0.00 | $0 | 40,000 | Direct |
| 09 Oct, 2025 | Graphene Group, Inc. Global | TenPercentOwner | Acquired J | 450,000 | $5.08 | $2.29Mn | 1,756,013 | Direct |
| 10 Sep, 2025 | Graphene Group, Inc. Global | TenPercentOwner | Disposed S | 23,468 | $5.38 | $126.32K | 1,316,545 | Direct |