Onconetix, Inc. (ONCO) Insider Ownership

Historic Insider Ownership Trends

ONCO's three largest insider shareholders as of March 23, 2026 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).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Joseph Hernandez Ceo 2,800,351 0 11 May, 2023
Cornerstone Investors Bwv I, Llc Cincinnati 1,161,201 0 10 Apr, 2023
Ralph Schiess Interim Ceo, Cso 673,365 0 22 Jan, 2025
Christian Bruhlmann Chief Strategy Officer 611,372 0 22 Jan, 2025
Venture Ag Altos 273,230 0 16 Jul, 2025
Erin Henderson Chief Business Officer 174,752 0 11 May, 2023
Jon Garfield Chief Financial Officer 100,000 0 11 May, 2023
Vuk Jeremic 6,360 0 01 Jun, 2023
James Sapirstein 3,477 0 30 Sep, 2024
Ajit Singh 3,396 0 30 Sep, 2024
Timothy R. Ramdeen 658 0 19 Aug, 2025
Simon Tarsh 658 0 19 Aug, 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.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
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 Andrew John Oakley Common Stock A 20 $0.00 20 D J
15 Aug, 2025 Thomas Meier Common Stock A 39 $0.00 39 D J
15 Aug, 2025 Andrew John Oakley Common Stock A 618 $0.00 638 D A
15 Aug, 2025 Simon Tarsh Common Stock A 618 $0.00 658 D A
15 Aug, 2025 Thomas Meier Common Stock A 618 $0.00 657 D A
15 Aug, 2025 Timothy R. Ramdeen Common Stock A 618 $0.00 658 D A
14 Jul, 2025 Venture Ag Altos Common Stock A 241,514 - 273,230 D J
14 Jul, 2025 Venture Ag Altos Make-whole right (right to acquire) D 241,514 - 0 D J
23 Mar, 2025 Andrew John Oakley Common Stock A 1,709 $0.00 1,709 D A
20 Dec, 2024 Ralph Schiess Common Stock A 177,462 $0.00 673,365 D A
20 Dec, 2024 Christian Bruhlmann Common Stock A 177,462 $0.00 611,372 D A
26 Sep, 2024 Timothy R. Ramdeen Common Stock A 3,318 $0.00 3,477 D A
26 Sep, 2024 Thomas Meier Common Stock A 3,318 $0.00 3,318 D A
26 Sep, 2024 James Sapirstein Common Stock A 3,318 $0.00 3,477 D A
26 Sep, 2024 Ajit Singh Common Stock A 3,318 $0.00 3,396 D A
26 Sep, 2024 Simon Tarsh Common Stock A 3,318 $0.00 3,477 D A
24 Sep, 2024 Ralph Schiess Common Stock A 489,160 - 495,903 D A
24 Sep, 2024 Christian Bruhlmann Common Stock A 428,010 - 433,910 D A