Onconetix's three largest insider shareholders as of September 29, 2026 are Joseph Hernandez (Ceo, 70.01K shares), Cornerstone Investors Bwv I, Llc Cincinnati (TenPercentOwner, 29.03K shares), Erin Henderson (Chief Business Officer, 4.37K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Joseph Hernandez | Ceo | 70,009 | 0 | 70,009 | 65.8% | 11 May, 2023 |
| 2 | Cornerstone Investors Bwv I, Llc Cincinnati | TenPercentOwner | 29,030 | 0 | 29,030 | 27.3% | 10 Apr, 2023 |
| 3 | Erin Henderson | Chief Business Officer | 4,369 | 0 | 4,369 | 4.1% | 11 May, 2023 |
| 4 | Jon Garfield | Chief Financial Officer | 2,500 | 0 | 2,500 | 2.3% | 11 May, 2023 |
| 5 | Ralph Schiess | Interim Ceo, Cso | 198 | 0 | 198 | 0.2% | 22 Jan, 2025 |
| 6 | Christian Bruhlmann | Chief Strategy Officer | 180 | 0 | 180 | 0.2% | 22 Jan, 2025 |
| 7 | Vuk Jeremic | Director | 159 | 0 | 159 | 0.1% | 01 Jun, 2023 |
| 8 | Venture Ag Altos | TenPercentOwner | 16 | 0 | 16 | 0.0% | 16 Jul, 2025 |
| 9 | James Sapirstein | Director | 1 | 0 | 1 | 0.0% | 30 Sep, 2024 |
| 10 | Ajit Singh | Director | 1 | 0 | 1 | 0.0% | 30 Sep, 2024 |
| 11 | Financial Lp Hrt | TenPercentOwner | 0 | 0 | 0 | 0.0% | 22 Apr, 2026 |
| 12 | Andrew John Oakley | Director | 0 | 0 | 0 | 0.0% | 19 Aug, 2025 |
| 13 | Simon Tarsh | Director | 0 | 0 | 0 | 0.0% | 19 Aug, 2025 |
| 14 | Timothy R. Ramdeen | Director | 0 | 0 | 0 | 0.0% | 19 Aug, 2025 |
| 15 | Thomas Meier | Director | 0 | 0 | 0 | 0.0% | 19 Aug, 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 |
|---|---|---|---|---|---|---|---|---|
| 21 Apr, 2026 | Financial Lp Hrt | TenPercentOwner | Disposed S | 49,710 | $117,346.94 | $5.83Bn | 0 | Direct |
| 16 Apr, 2026 | Financial Lp Hrt | TenPercentOwner | Disposed S | 53,867 | $124,149.66 | $6.69Bn | 1 | Direct |
| 17 Apr, 2026 | Financial Lp Hrt | TenPercentOwner | Acquired P | 34,636 | $124,149.66 | $4.30Bn | 1 | Direct |
| 20 Apr, 2026 | Financial Lp Hrt | TenPercentOwner | Disposed S | 94,462 | $127,551.02 | $12.05Bn | 0 | Direct |
| 14 Apr, 2026 | Financial Lp Hrt | TenPercentOwner | Acquired P | 74,350 | $130,952.38 | $9.74Bn | 1 | Direct |
| 15 Apr, 2026 | Financial Lp Hrt | TenPercentOwner | Acquired P | 92,554 | $129,251.70 | $11.96Bn | 1 | Direct |
| 15 Aug, 2025 | Andrew John Oakley | Director | Acquired J | 20 | $0.00 | $0 | 0 | Direct |
| 15 Aug, 2025 | Timothy R. Ramdeen | Director | Acquired J | 39 | $0.00 | $0 | 0 | Direct |
| 15 Aug, 2025 | Simon Tarsh | Director | Acquired J | 39 | $0.00 | $0 | 0 | Direct |
| 15 Aug, 2025 | Thomas Meier | Director | Acquired J | 39 | $0.00 | $0 | 0 | Direct |
| 15 Aug, 2025 | Thomas Meier | Director | Acquired A | 618 | $0.00 | $0 | 0 | Direct |
| 15 Aug, 2025 | Simon Tarsh | Director | Acquired A | 618 | $0.00 | $0 | 0 | Direct |
| 15 Aug, 2025 | Timothy R. Ramdeen | Director | Acquired A | 618 | $0.00 | $0 | 0 | Direct |
| 15 Aug, 2025 | Andrew John Oakley | Director | Acquired A | 618 | $0.00 | $0 | 0 | Direct |
| 14 Jul, 2025 | Venture Ag Altos | TenPercentOwner | Acquired J | 241,514 | — | — | 16 | Direct |
| 14 Jul, 2025 | Venture Ag Altos | TenPercentOwner | Disposed J | 241,514 | — | — | 0 | Direct |
| 23 Mar, 2025 | Andrew John Oakley | Director | Acquired A | 1,709 | $0.00 | $0 | 1 | Direct |
| 20 Dec, 2024 | Christian Bruhlmann | Chief Strategy Officer | Acquired A | 177,462 | $0.00 | $0 | 180 | Direct |
| 20 Dec, 2024 | Ralph Schiess | Interim Ceo, Cso | Acquired A | 177,462 | $0.00 | $0 | 198 | Direct |
| 26 Sep, 2024 | Simon Tarsh | Director | Acquired A | 3,318 | $0.00 | $0 | 1 | Direct |