As of August 04, 2026, Onconetix's top three insider holders are Joseph Hernandez (Ceo, 2.80Mn shares), Cornerstone Investors Bwv I, Llc Cincinnati (TenPercentOwner, 1.16Mn shares), Ralph Schiess (Interim Ceo, Cso, 673.37K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Jon Garfield | Chief Financial Officer | 100,000 | 0 | 11 May, 2023 |
| Financial Lp Hrt | - | 197,052 | 0 | 16 Apr, 2026 |
| James Sapirstein | - | 3,477 | 0 | 30 Sep, 2024 |
| Ajit Singh | - | 3,396 | 0 | 30 Sep, 2024 |
| Joseph Hernandez | Ceo | 2,800,351 | 0 | 11 May, 2023 |
| Cornerstone Investors Bwv I, Llc Cincinnati | - | 1,161,201 | 0 | 10 Apr, 2023 |
| Erin Henderson | Chief Business Officer | 174,752 | 0 | 11 May, 2023 |
| Simon Tarsh | - | 658 | 0 | 19 Aug, 2025 |
| Vuk Jeremic | - | 6,360 | 0 | 01 Jun, 2023 |
| Timothy R. Ramdeen | - | 658 | 0 | 19 Aug, 2025 |
| Christian Bruhlmann | Chief Strategy Officer | 611,372 | 0 | 22 Jan, 2025 |
| Ralph Schiess | Interim Ceo, Cso | 673,365 | 0 | 22 Jan, 2025 |
| Venture Ag Altos | - | 273,230 | 0 | 16 Jul, 2025 |
| Thomas Meier | - | 657 | 0 | 19 Aug, 2025 |
| Andrew John Oakley | - | 638 | 0 | 19 Aug, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 21 Apr, 2026 | Financial Lp Hrt | Class A Shares | D | 49,710 | $0.69 | 33,649 | D | S |
| 16 Apr, 2026 | Financial Lp Hrt | Class A Shares | D | 53,867 | $0.73 | 143,185 | D | S |
| 17 Apr, 2026 | Financial Lp Hrt | Class A Shares | A | 34,636 | $0.73 | 177,821 | D | P |
| 20 Apr, 2026 | Financial Lp Hrt | Class A Shares | D | 94,462 | $0.75 | 83,359 | D | S |
| 14 Apr, 2026 | Financial Lp Hrt | Class A Shares | A | 74,350 | $0.77 | 104,498 | D | P |
| 15 Apr, 2026 | Financial Lp Hrt | Class A Shares | A | 92,554 | $0.76 | 197,052 | D | P |
| 15 Aug, 2025 | Simon Tarsh | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Timothy R. Ramdeen | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Andrew John Oakley | Common Stock | A | 20 | $0.00 | 20 | D | J |
| 15 Aug, 2025 | Simon Tarsh | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Simon Tarsh | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Timothy R. Ramdeen | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Timothy R. Ramdeen | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Simon Tarsh | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Simon Tarsh | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Timothy R. Ramdeen | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Timothy R. Ramdeen | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Simon Tarsh | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Thomas Meier | Common Stock | A | 39 | $0.00 | 39 | D | J |
| 15 Aug, 2025 | Timothy R. Ramdeen | Common Stock | A | 39 | $0.00 | 40 | D | J |