Data spanning the past 90 days through February 19, 2026 reveals that Onconetix's three principal insider shareholders consist of TenPercentOwner Venture Ag Altos (273.23K shares), Interim Ceo And Cso Ralph Schiess (7.92K shares), Chief Strategy Officer Christian Bruhlmann (7.19K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Joseph Hernandez | Ceo | 10 | 11 May, 2023 |
| Cornerstone Investors Bwv I, Llc Cincinnati | 4 | 10 Apr, 2023 | |
| Ralph Schiess | Interim Ceo And Cso | 7,919 | 22 Jan, 2025 |
| Christian Bruhlmann | Chief Strategy Officer | 7,190 | 22 Jan, 2025 |
| Venture Ag Altos | 273,230 | 16 Jul, 2025 | |
| Erin Henderson | Chief Business Officer | 1 | 11 May, 2023 |
| Jon Garfield | Chief Financial Officer | 0 | 11 May, 2023 |
| Vuk Jeremic | 0 | 01 Jun, 2023 | |
| James Sapirstein | 41 | 30 Sep, 2024 | |
| Ajit Singh | 40 | 30 Sep, 2024 | |
| Timothy R. Ramdeen | 658 | 19 Aug, 2025 | |
| Simon Tarsh | 658 | 19 Aug, 2025 | |
| Thomas Meier | 657 | 19 Aug, 2025 | |
| Andrew John Oakley | 638 | 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 |
|---|---|---|---|---|---|---|---|---|
| 15 Aug, 2025 | Simon Tarsh | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Simon Tarsh | Common Stock | A | 618 | $0.00 | 658 | D | A |
| 15 Aug, 2025 | Timothy R. Ramdeen | Common Stock | A | 39 | $0.00 | 40 | D | J |
| 15 Aug, 2025 | Timothy R. Ramdeen | Common Stock | A | 618 | $0.00 | 658 | D | A |
| 15 Aug, 2025 | Thomas Meier | Common Stock | A | 39 | $0.00 | 39 | D | J |
| 15 Aug, 2025 | Thomas Meier | Common Stock | A | 618 | $0.00 | 657 | D | A |
| 15 Aug, 2025 | Andrew John Oakley | Common Stock | A | 20 | $0.00 | 20 | D | J |
| 15 Aug, 2025 | Andrew John Oakley | Common Stock | A | 618 | $0.00 | 638 | D | A |
| 14 Jul, 2025 | Venture Ag Altos | Common Stock | A | 241,514 | - | 273,230 | D | J |
| 23 Mar, 2025 | Andrew John Oakley | Common Stock | A | 1,709 | $0.00 | 20 | D | A |
| 20 Dec, 2024 | Christian Bruhlmann | Common Stock | A | 177,462 | $0.00 | 7,190 | D | A |
| 20 Dec, 2024 | Ralph Schiess | Common Stock | A | 177,462 | $0.00 | 7,919 | D | A |
| 20 Dec, 2024 | Ralph Schiess | - | - | 7,919 | D | |||
| 26 Sep, 2024 | James Sapirstein | - | - | 41 | D | |||
| 26 Sep, 2024 | James Sapirstein | Common Stock | A | 3,318 | $0.00 | 41 | D | A |
| 26 Sep, 2024 | Ajit Singh | Common Stock | A | 3,318 | $0.00 | 40 | D | A |
| 26 Sep, 2024 | Simon Tarsh | Common Stock | A | 3,318 | $0.00 | 41 | D | A |
| 26 Sep, 2024 | Timothy R. Ramdeen | Common Stock | A | 3,318 | $0.00 | 41 | D | A |
| 26 Sep, 2024 | Thomas Meier | Common Stock | A | 3,318 | $0.00 | 39 | D | A |
| 24 Sep, 2024 | Christian Bruhlmann | Common Stock | A | 428,010 | - | 5,103 | D | A |