Onconetix, Inc. (ONCO)

Nasdaq: ONCO · Pharmaceutical Preparations · Cincinnati, OH · filing with the SEC since 2019

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Grade3.3

◀ Past 2.8● Present 2.4▶ Future 4.5

2 est.

Overview Business Financials Grade Forecast Sentiment Ownership People Filings Patents Chart

Who owns Onconetix, Inc.

As filed with the SEC

Holders of 5% or more

Altos Venture AG holds 35.8% of Common Stock, par value $0.00001 per share, as its SCHEDULE 13D/A filed Jul 16, 2025 says.

Directors and officers

report now, of 22 people on the record since 2022. Their holdings as a group are not read here.

Institutions as a whole

n/a

The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 3 named at left.

Holders of 5% or moreshare of the class, as filed

Altos Venture AG

SCHEDULE 13D/A · filed Jul 16, 2025 · Common Stock, par value $0.00001 per share

35.8%

Scablis AG

SCHEDULE 13G · filed Sep 27, 2024 · Common stock, par value $0.00001 per share

Keystone Capital Partners, LLC

SCHEDULE 13G · filed Jul 27, 2026 · Common stock, par value $0.00001 per share

6.1%

Ralph Schiess

SCHEDULE 13D/A · filed Feb 14, 2025 · Common Stock, $0.00001 par value per share · reported falling below 5%

under 5%

Christian Bruhlmann

SCHEDULE 13D/A · filed Feb 14, 2025 · Common Stock, $0.00001 par value per share · reported falling below 5%

under 5%

Zurcher Kantonalbank (Zurich Cantonalbank)

SCHEDULE 13G/A · filed Feb 7, 2025 · Common stock, par value $0.00001 per share · reported falling below 5%

under 5%

American Financial Group, Inc.

SCHEDULE 13G/A · filed Feb 13, 2025 · Common, $0.00001 par value · reported falling below 5%

under 5%

What ONCO reports owning in othersstakes of 5% or more, and other ties

1 subsidiary in 1 country, from the list filed with the 10-K filed Mar 13, 2026.

Insider tradesForm 4

0sales

0purchases

0sales on a scheduled plan

0people selling

$0sold, in dollars

$0bought, in dollars

Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.

By calendar yearSoldBought

2022 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.

People who traded in the window1 of 26 on the roster

Person	Role as filed	Sales	Sold	On a plan	Buys	Bought
Hrt Financial LP	10% owner	3	$100,000	0	3	$200,000

SI Assistanton ONCO · research, not advice