Onconetix ONCO Insider Ownership

NASDAQ ONCO
$0.41 -0.02 (-5.55%)
At close: Oct 20, 2026 · 4:00 PM EDT

Insider Holdings by Owner

9.21K Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
0.153%
■0% pp QoQ
Shares Held by Insiders
5.82K
filed for Sep 2026
■0.00% QoQ
Shares Outstanding
3.79Mn
3,793,673 shares
Direct Holdings
5.82K
Indirect: 0
Net Shares Traded (QoQ)
0
no net change in Sep 2026
Insiders Holding Shares
15
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Over the past 12 months, Onconetix insiders made no open-market purchases or sales of the stock.

Form 4 Holdings

Insiders Holding ONCO

Insiders 15
Shares held 9.21K
Of outstanding 0.243%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Venture Ag Altos TenPercentOwner 5,465 0 5,465 59.3% 16 Jul, 2025
2 Financial Lp Hrt TenPercentOwner 3,365 0 3,365 36.5% 22 Apr, 2026
3 Ralph Schiess Interim Ceo, Cso 158 0 158 1.7% 22 Jan, 2025
4 Christian Bruhlmann Chief Strategy Officer 144 0 144 1.6% 22 Jan, 2025
5 Joseph Hernandez Ceo 16 0 16 0.2% 11 May, 2023
6 Simon Tarsh Director 13 0 13 0.1% 19 Aug, 2025
7 Timothy R. Ramdeen Director 13 0 13 0.1% 19 Aug, 2025
8 Thomas Meier Director 13 0 13 0.1% 19 Aug, 2025
9 Andrew John Oakley Director 13 0 13 0.1% 19 Aug, 2025
10 Cornerstone Investors Bwv I, Llc Cincinnati TenPercentOwner 7 0 7 0.1% 10 Apr, 2023
11 Erin Henderson Chief Business Officer 1 0 1 0.0% 11 May, 2023
12 James Sapirstein Director 1 0 1 0.0% 30 Sep, 2024
13 Ajit Singh Director 1 0 1 0.0% 30 Sep, 2024
14 Jon Garfield Chief Financial Officer 1 0 1 0.0% 11 May, 2023
15 Vuk Jeremic Director 0 0 0 0.0% 01 Jun, 2023

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.

Form 4 Filings

60 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
21 Apr, 2026 Financial Lp Hrt TenPercentOwner Disposed S 49,710 $6.90 $343.00K 3,365 Direct
16 Apr, 2026 Financial Lp Hrt TenPercentOwner Disposed S 53,867 $7.30 $393.23K 14,319 Direct
17 Apr, 2026 Financial Lp Hrt TenPercentOwner Acquired P 34,636 $7.30 $252.84K 17,782 Direct
20 Apr, 2026 Financial Lp Hrt TenPercentOwner Disposed S 94,462 $7.50 $708.47K 8,336 Direct
14 Apr, 2026 Financial Lp Hrt TenPercentOwner Acquired P 74,350 $7.70 $572.50K 10,450 Direct
15 Apr, 2026 Financial Lp Hrt TenPercentOwner Acquired P 92,554 $7.60 $703.41K 19,705 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 1 Direct
15 Aug, 2025 Simon Tarsh Director Acquired J 39 $0.00 $0 1 Direct
15 Aug, 2025 Thomas Meier Director Acquired J 39 $0.00 $0 1 Direct
15 Aug, 2025 Thomas Meier Director Acquired A 618 $0.00 $0 13 Direct
15 Aug, 2025 Simon Tarsh Director Acquired A 618 $0.00 $0 13 Direct
15 Aug, 2025 Timothy R. Ramdeen Director Acquired A 618 $0.00 $0 13 Direct
15 Aug, 2025 Andrew John Oakley Director Acquired A 618 $0.00 $0 13 Direct
14 Jul, 2025 Venture Ag Altos TenPercentOwner Acquired J 241,514 — — 5,465 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 0 Direct
20 Dec, 2024 Christian Bruhlmann Chief Strategy Officer Acquired A 177,462 $0.00 $0 144 Direct
20 Dec, 2024 Ralph Schiess Interim Ceo, Cso Acquired A 177,462 $0.00 $0 158 Direct
26 Sep, 2024 Simon Tarsh Director Acquired A 3,318 $0.00 $0 1 Direct