1RT Acquisition Corp. Schedule 13G filing reports that a group led by RP Investment Advisors LP beneficially holds 865,500 Class A ordinary shares, representing 5.0% of the class.
The filing states the 17,250,000 Ordinary Shares outstanding as of November 13, 2025 is the basis for the percentage. The statement is jointly filed on behalf of four funds and the advisor and includes shared voting and dispositive power figures for each fund.
Positive
None.
Negative
None.
Insights
Group filing discloses passive/beneficial holdings and voting arrangements.
The statement lists beneficial ownership by RP-managed funds totaling 865,500 shares and shows shared voting and dispositive power across the funds. The November 13, 2025 outstanding-share count is cited as the basis for the 5.0% stake.
Filing language emphasizes non‑admission of acting as a group under Sections 13(d)/13(g). Subsequent disclosures may clarify any changes in voting coordination; timing of such disclosures is not provided in the excerpt.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
1RT ACQUISITION CORP.
(Name of Issuer)
Class A ordinary shares, par value $0.0001 per share
(Title of Class of Securities)
02/24/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
SCHEDULE 13G
CUSIP Number(s):
1
Names of Reporting Persons
RP Investment Advisors LP
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
CANADA (FEDERAL LEVEL)
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
865,500.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
865,500.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
865,500.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.0 %
12
Type of Reporting Person (See Instructions)
IA, PN, FI
Comment for Type of Reporting Person: The figure in Item 11 is based upon 17,250,000 Class A ordinary shares, par value $0.0001 per share ("Ordinary Shares") of 1RT Acquisition Corp. (the "Issuer") outstanding as of November 13, 2025, as disclosed in the Issuer's quarterly report on Form 10-Q for the quarterly period ended September 30, 2025, filed with the U.S. Securities and Exchange Commission (the "SEC") on November 13, 2025.
SCHEDULE 13G
CUSIP Number(s):
1
Names of Reporting Persons
RP Select Opportunities Master Fund Ltd.
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
CAYMAN ISLANDS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
320,783.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
320,783.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
320,783.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
1.9 %
12
Type of Reporting Person (See Instructions)
FI
Comment for Type of Reporting Person: The figure in Item 11 is based upon 17,250,000 Ordinary Shares outstanding as of November 13, 2025, as disclosed in the Issuer's quarterly report on Form 10-Q for the quarterly period ended September 30, 2025, filed with the SEC on November 13, 2025.
SCHEDULE 13G
CUSIP Number(s):
1
Names of Reporting Persons
RP Debt Opportunities Fund Ltd.
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
CAYMAN ISLANDS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
194,886.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
194,886.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
194,886.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
1.1 %
12
Type of Reporting Person (See Instructions)
FI
Comment for Type of Reporting Person: The figure in Item 11 is based upon 17,250,000 Ordinary Shares outstanding as of November 13, 2025, as disclosed in the Issuer's quarterly report on Form 10-Q for the quarterly period ended September 30, 2025, filed with the SEC on November 13, 2025.
SCHEDULE 13G
CUSIP Number(s):
1
Names of Reporting Persons
RP Alternative Global Bond Fund
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
CANADA (FEDERAL LEVEL)
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
264,822.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
264,822.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
264,822.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
1.5 %
12
Type of Reporting Person (See Instructions)
FI
Comment for Type of Reporting Person: The figure in Item 11 is based upon 17,250,000 Ordinary Shares outstanding as of November 13, 2025, as disclosed in the Issuer's quarterly report on Form 10-Q for the quarterly period ended September 30, 2025, filed with the SEC on November 13, 2025.
SCHEDULE 13G
CUSIP Number(s):
1
Names of Reporting Persons
RP Alternative Credit Opportunities Fund
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
CANADA (FEDERAL LEVEL)
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
85,009.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
85,009.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
85,009.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.5 %
12
Type of Reporting Person (See Instructions)
FI
Comment for Type of Reporting Person: The figure in Item 11 is based upon 17,250,000 Ordinary Shares outstanding as of November 13, 2025, as disclosed in the Issuer's quarterly report on Form 10-Q for the quarterly period ended September 30, 2025, filed with the SEC on November 13, 2025.
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
1RT ACQUISITION CORP.
(b)
Address of issuer's principal executive offices:
205 West 28th Street, 2nd Floor Suite C, New York, New York 10001
Item 2.
(a)
Name of person filing:
This statement is jointly filed by and on behalf of each of RP Investment Advisors LP, RP Select Opportunities Master Fund Ltd., RP Debt Opportunities Fund Ltd., RP Alternative Global Bond Fund, and RP Alternative Credit Opportunities Fund. RP Select Opportunities Master Fund Ltd., RP Debt Opportunities Fund Ltd., RP Alternative Global Bond Fund, and RP Alternative Credit Opportunities Fund (the "Funds") are the record and direct beneficial owners of the securities covered by this statement. RP Investment Advisors LP is the investment advisor of, and may be deemed to beneficially own securities owned by, the Funds.
Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) or 13(g) of the Act or any other purpose, the beneficial owner of any securities covered by this statement.
Each of the reporting persons may be deemed to be a member of a group with respect to the Issuer or securities of the Issuer for the purposes of Section 13(d) or 13(g) of the Act. Each of the reporting persons declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) or 13(g) of the Act or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate, or other group for the purpose of acquiring, holding, or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any group with respect to the Issuer or any securities of the Issuer.
(b)
Address or principal business office or, if none, residence:
The address of the principal business office of each of the reporting persons is 39 Hazelton Avenue, Toronto, Ontario, Canada, M5R 2E3.
(c)
Citizenship:
See Item 4 on the cover page(s) hereto.
(d)
Title of class of securities:
Class A ordinary shares, par value $0.0001 per share
(e)
CUSIP No.:
G6757R105
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
See Item 9 on the cover page(s) hereto.
(b)
Percent of class:
See Item 11 on the cover page(s) hereto.
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
See Item 5 on the cover page(s) hereto.
(ii) Shared power to vote or to direct the vote:
See Item 6 on the cover page(s) hereto.
(iii) Sole power to dispose or to direct the disposition of:
See Item 7 on the cover page(s) hereto.
(iv) Shared power to dispose or to direct the disposition of:
See Item 8 on the cover page(s) hereto.
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
Not Applicable
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
RP Investment Advisors LP
Signature:
/s/ Richard Pilosof
Name/Title:
Richard Pilosof, Chief Executive Officer, RP Investment Advisors LP by its General Partner RP Investment Advisors GP Inc.
Date:
03/03/2026
RP Select Opportunities Master Fund Ltd.
Signature:
/s/ Richard Pilosof
Name/Title:
Richard Pilosof, Chief Executive Officer, RP Investment Advisors LP by its General Partner RP Investment Advisors GP Inc.
Date:
03/03/2026
RP Debt Opportunities Fund Ltd.
Signature:
/s/ Richard Pilosof
Name/Title:
Richard Pilosof, Chief Executive Officer, RP Investment Advisors LP by its General Partner RP Investment Advisors GP Inc.
Date:
03/03/2026
RP Alternative Global Bond Fund
Signature:
/s/ Richard Pilosof
Name/Title:
Richard Pilosof, Chief Executive Officer, RP Investment Advisors LP by its General Partner RP Investment Advisors GP Inc.
Date:
03/03/2026
RP Alternative Credit Opportunities Fund
Signature:
/s/ Richard Pilosof
Name/Title:
Richard Pilosof, Chief Executive Officer, RP Investment Advisors LP by its General Partner RP Investment Advisors GP Inc.
What stake does RP Investment Advisors report in ONCH?
The filing reports 865,500 Class A shares held by the RP group, equal to 5.0% of the class. This percentage uses an outstanding share base of 17,250,000 shares as of November 13, 2025.
Which RP entities are listed as beneficial owners of ONCH?
The joint filing lists RP Investment Advisors LP and four funds: RP Select Opportunities Master Fund Ltd., RP Debt Opportunities Fund Ltd., RP Alternative Global Bond Fund, and RP Alternative Credit Opportunities Fund as reporting persons.
Does the filing indicate who has voting or disposal power for ONCH shares?
Yes. The filing shows shared voting and shared dispositive power for the funds; RP Investment Advisors reports shared voting/dispositive power totaling the 865,500 shares disclosed in Item 9.
On what date is the percent-of-class calculation for ONCH based?
The percentage is based on 17,250,000 Ordinary Shares outstanding as of November 13, 2025, as cited in the issuer's Form 10-Q for the quarter ended September 30, 2025, filed on November 13, 2025.
