Simon Tarsh - Aug 15, 2025 Form 4 Insider Report for Onconetix, Inc. (ONCO)

Role: Director
Signature: /s/ Simon Tarsh
Stock symbol: ONCO
Transactions as of: Aug 15, 2025
Transactions value $: $0
Form type: 4
Date filed: 8/19/2025, 04:05 PM
Previous filing: Nov 6, 2024
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Tarsh Simon	Director	C/O ONCONETIX, INC., 201 E. FIFTH STREET, SUITE 1900, CINCINNATI	/s/ Simon Tarsh	2025-08-19	0001943931

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ONCO	Common Stock	Other	$0	+39	+3900%	$0.00	40	Aug 15, 2025	Direct	F1, F2
transaction	ONCO	Common Stock	Award	$0	+618	+1545%	$0.00	658	Aug 15, 2025	Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents a restricted stock award originally granted to the Reporting Person on September 26, 2024 pursuant to the Issuer's 2022 Equity Incentive Plan, as amended ("2022 Plan" and the grant on such date, the "Original Award"). On August 15, 2025, the Original Award was modified to change the vesting terms, such that the award, which was to vest in full on August 31, 2025, was changed to vest in full on August 31, 2026, so long as the Reporting Person continues to serve as a non-employee director of the Issuer until such date. Except as set forth herein, the Original Award remains unmodified.
F2	On June 13, 2025, the Issuer effected a 1-for-85 reverse split of its Common Stock. The amounts set forth herein are presented on a post-split basis.
F3	Represents a restricted stock award granted to the Reporting Person pursuant to the 2022 Plan. The award will vest in full on August 31, 2026 so long as the Reporting Person continues to serve as a non-employee director of the Issuer until such date.