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

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1. Name and Address of Reporting Person * Tapiero Daniel M. (Last) (First) (Middle) C/O 1RT ACQUISITION CORP. 205 WEST 28TH STREET, 2ND FLOOR SUITE C (Street) NEW YORK NY 10001 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 07/01/2025	3. Issuer Name and Ticker or Trading Symbol 1RT Acquisition Corp. [ ONCH ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner X Officer (give title below) Other (specify below) Chief Executive Officer	5. If Amendment, Date of Original Filed (Month/Day/Year)
			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)

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
Class B Ordinary Shares	(1)	(1)	Class A Ordinary Shares	4,312,500	(1)	I	See footnote (2)

Explanation of Responses:

1. As described in the registration statement on Form S-1 (File No. 333-287941) of 1RT Acquisition Corp. (the "Issuer") under the heading "Description of Securities--Founder Shares," the shares of Class B ordinary shares will automatically convert into shares of Class A ordinary shares at the time of the Issuer's initial business combination, or at any time prior to the Issuer's initial business combination, at the option of the holder, on a one-for-one basis, subject to certain adjustments. The Class B ordinary shares have no expiration date.

2. Interests shown are directly held by 1RT Acquisition Sponsor LLC. The members of 1RT Acquisition Sponsor LLC are 1RT DAE Opportunities Fund, LP and 1RT DAE Opportunities Fund-A, LP (the "Funds"). 1RT Partners GP I, LLC is the general partner of the Funds and has voting control over the Funds. Dan Tapiero is the sole member and holds voting control over 1RT Partners GP I, LLC. As a result of the foregoing, Dan Tapiero may be deemed to have beneficial ownership (as determined under Section 13(d) of the Exchange Act) of the securities directly held by 1RT Acquisition Sponsor LLC.

	/s/ Daniel Tapiero	07/01/2025
	** Signature of Reporting Person	Date
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