HRT FINANCIAL LP (ONCO) discloses 104,498 Class A Shares in Form 3

Rhea-AI Filing Summary

Onconetix, Inc. disclosed that HRT FINANCIAL LP is a ten percent owner and filed an initial ownership report. The filing shows HRT FINANCIAL LP directly holds 104,498 Class A Shares of Onconetix common equity. This is a status report of existing holdings, not a new purchase or sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider HRT FINANCIAL LP

Role 10% Owner

Type	Security	Shares	Price	Value
holding	Class A Shares	--	--	--

Holdings After Transaction: Class A Shares — 104,498 shares (Direct)

Footnotes (1)

Key Figures

Class A Shares held: 104,498 shares Insider status: Ten percent owner Transaction direction: No buy or sell reported

3 metrics

Class A Shares held 104,498 shares Direct ownership reported in Form 3

Insider status Ten percent owner HRT FINANCIAL LP reporting person classification

Transaction direction No buy or sell reported Form 3 initial ownership, holding entry only

Key Terms

Form 3, ten percent owner, Class A Shares, direct ownership, +1 more

5 terms

Form 3 regulatory

"INSIDER FILING DATA (Form 3):"

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

ten percent owner regulatory

""is_ten_percent_owner": 1"

Class A Shares financial

""security_title": "Class A Shares""

Class A shares are one of a company’s distinct types of stock that come with a specific set of rights—commonly different voting power, dividend treatment, or transfer rules—defined in the company’s charter. Investors care because those rights affect control, income and resale value; like holding a seat at a table that has different rules or stronger chips than other seats, owning Class A changes how much influence and return you can expect.

direct ownership financial

""direct_or_indirect": "D""

transaction_code regulatory

""transaction_code_description": "Unknown transaction code""

Understanding Insider Trading Forms →

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

HRT FINANCIAL LP

(Last) (First) (Middle)

3 WORLD TRADE CENTER, 175 GREENWICH STRE

76TH FLOOR

(Street)

NEW YORK NEW YORK 10007

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
04/14/2026

3. Issuer Name and Ticker or Trading Symbol
Onconetix, Inc. [ ONCO ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Shares	104,498	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	Adam Nunes	04/16/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does HRT FINANCIAL LP report in its Form 3 for ONCO?

HRT FINANCIAL LP reports an existing position in Onconetix, Inc., directly holding 104,498 Class A Shares. This Form 3 is an initial ownership statement, not a record of new buying or selling activity.

Is HRT FINANCIAL LP a 10% owner of Onconetix (ONCO)?

Yes. The Form 3 identifies HRT FINANCIAL LP as a ten percent owner of Onconetix, Inc. This status typically reflects a significant equity stake and triggers the requirement to file ownership reports.

How many Onconetix Class A Shares does HRT FINANCIAL LP hold?

HRT FINANCIAL LP reports holding 104,498 Class A Shares of Onconetix, Inc. These shares are listed as directly owned, providing a baseline view of the firm’s reported equity position in ONCO.

Does this Onconetix (ONCO) Form 3 show insider buying or selling?

No. The Form 3 functions as an initial ownership statement. It reports that HRT FINANCIAL LP holds 104,498 Class A Shares but does not record any new purchase, sale, or derivative transaction in this filing.

What type of security does HRT FINANCIAL LP hold in Onconetix?

HRT FINANCIAL LP holds Class A Shares of Onconetix, Inc. The filing lists this as the security title, indicating a position in the company’s primary equity class rather than in derivatives or preferred stock.