Impact Biomedical's top three insider shareholders as of September 29, 2026 are Inc. Dss, (TenPercentOwner, 1.18Mn shares), Heng Fai Ambrose Chan (Director, 734.06K shares), Inc. Dss, (TenPercentOwner, 589.52K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Heng Fai Ambrose Chan | Director, TenPercentOwner | 0 | 734,058 | 734,058 | 40.2% | 02 Apr, 2025 |
| 2 | Inc. Dss, | TenPercentOwner | 589,518 | 0 | 589,518 | 32.3% | 24 Sep, 2026 |
| 3 | Jason Grady | Director | 250,182 | 0 | 250,182 | 13.7% | 25 Mar, 2026 |
| 4 | Todd D Macko | Chief Financial Officer | 155,122 | 0 | 155,122 | 8.5% | 30 Mar, 2026 |
| 5 | Frank D Heuszel | Chief Executive Officer | 97,344 | 0 | 97,344 | 5.3% | 09 Dec, 2024 |
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 |
|---|---|---|---|---|---|---|---|---|
| 22 Sep, 2026 | Inc. Dss, | TenPercentOwner | Disposed S | 723 | $0.55 | $398 | 589,701 | Direct |
| 23 Sep, 2026 | Inc. Dss, | TenPercentOwner | Disposed S | 27 | $6.95 | $188 | 589,674 | Direct |
| 24 Sep, 2026 | Inc. Dss, | TenPercentOwner | Disposed S | 156 | $7.06 | $1.10K | 589,518 | Direct |
| 25 Mar, 2026 | Todd D Macko | Chief Financial Officer | Disposed S | 1,600 | $0.60 | $961 | 198,122 | Direct |
| 27 Mar, 2026 | Todd D Macko | Chief Financial Officer | Disposed S | 43,400 | $0.56 | $24.37K | 155,122 | Direct |
| 23 Mar, 2026 | Jason Grady | Director | Disposed S | 50,000 | $0.65 | $32.51K | 250,182 | Direct |
| 22 May, 2025 | Inc. Dss, | TenPercentOwner | Disposed S | 115,600 | $0.55 | $63.48K | 45,400 | Direct |
| 27 May, 2025 | Inc. Dss, | TenPercentOwner | Disposed S | 45,400 | $0.54 | $24.53K | 0 | Direct |
| 04 Apr, 2025 | Inc. Dss, | TenPercentOwner | Disposed S | 890,800 | $0.95 | $845.01K | 161,100 | Direct |
| 03 Apr, 2025 | Heng Fai Ambrose Chan | Director | Disposed S | 351,555 | $0.50 | $174.02K | 0 | Indirect |
| 02 Apr, 2025 | Heng Fai Ambrose Chan | Director, TenPercentOwner | Disposed S | 300,000 | $0.58 | $174.30K | 553,904 | Indirect |
| 02 Apr, 2025 | Heng Fai Ambrose Chan | Director, TenPercentOwner | Disposed S | 200,000 | $0.67 | $134.80K | 353,904 | Indirect |
| 02 Apr, 2025 | Heng Fai Ambrose Chan | Director, TenPercentOwner | Disposed S | 2,349 | $0.67 | $1.58K | 351,555 | Indirect |
| 02 Apr, 2025 | Heng Fai Ambrose Chan | Director, TenPercentOwner | Disposed S | 382,427 | $0.58 | $222.95K | 351,631 | Indirect |
| 03 Apr, 2025 | Heng Fai Ambrose Chan | Director, TenPercentOwner | Disposed S | 351,631 | $0.58 | $203.59K | 0 | Indirect |
| 03 Apr, 2025 | Heng Fai Ambrose Chan | Director, TenPercentOwner | Disposed S | 273,286 | $0.78 | $212.89K | 180,000 | Indirect |
| 04 Apr, 2025 | Heng Fai Ambrose Chan | Director, TenPercentOwner | Disposed S | 180,000 | $0.96 | $172.80K | 0 | Indirect |
| 31 Mar, 2025 | Heng Fai Ambrose Chan | Director, TenPercentOwner | Disposed S | 300,000 | $1.03 | $308.40K | 1,253,904 | Indirect |
| 01 Apr, 2025 | Heng Fai Ambrose Chan | Director, TenPercentOwner | Disposed S | 400,000 | $0.98 | $392.80K | 853,904 | Indirect |
| 01 Apr, 2025 | Heng Fai Ambrose Chan | Director, TenPercentOwner | Disposed S | 650,000 | $1.45 | $940.55K | 1,910,976 | Indirect |