OneIM Acquisition Corp. Schedule 13G reports that five RP-affiliated funds and their adviser, RP Investment Advisors LP, collectively disclose shared voting and dispositive power over specified Class A ordinary shares. The filing cites 28,750,000 Class A ordinary shares outstanding as of May 11, 2026 and lists individual holdings and percentages for each fund.
The largest reported position is 1,812,994 shares (6.3%) held with shared voting/dispositive power by RP Investment Advisors-related entities. The filing is a joint statement signed by Richard Pilosof on behalf of the reporting persons.
Positive
None.
Negative
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Insights
Joint Schedule 13G shows RP-related funds hold multiple passive stakes totaling several percentiles of the class.
The filing lists specific shared voting and dispositive powers for five RP-affiliated funds and states the issuer had 28,750,000 Class A ordinary shares outstanding as of May 11, 2026. Each fund's reported share count and percent-of-class are provided on the cover pages.
The filing repeatedly emphasizes passive reporting and contains standard group and non‑admission language referencing Section 13(d) or 13(g). Future filings would show any changes in reported percentages or voting arrangements.
"This statement is jointly filed by and on behalf of each of RP Investment Advisors"
A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.
shared voting powerfinancial
"Shared Voting Power 1,812,994.00"
Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.
beneficial ownerregulatory
"neither the filing of this statement nor anything herein shall be construed as an admission ... the beneficial owner"
A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.
Section 13(d) or 13(g)regulatory
"for the purposes of Section 13(d) or 13(g) of the Act"
What stake does RP Investment Advisors report in OneIM Acquisition (OIM)?
RP-related entities report shared voting and dispositive power over individual holdings such as 1,812,994 shares (6.3%). The statement is a joint Schedule 13G filed and signed by Richard Pilosof on behalf of the reporting persons.
What is the total number of OneIM Class A shares used to calculate percentages?
The filing cites 28,750,000 Class A ordinary shares outstanding as of May 11, 2026. Reported percentages for each fund are calculated using that outstanding share figure as stated in the filing.
Which RP funds are named as beneficial owners in the Schedule 13G?
The Schedule 13G names five RP-affiliated holders: 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.
Does the filing state the RP group is acting as an acquiring group under Sections 13(d) or 13(g)?
The filing includes explicit language that the reporting persons do not admit they are beneficial owners under Section 13(d) or 13(g) and that they may be deemed members of a group; those are standard Schedule 13G qualifiers.
Who signed the Schedule 13G for the RP reporting persons?
The joint statement is signed by Richard Pilosof, Chief Executive Officer of RP Investment Advisors LP, signing on behalf of the reporting persons with dates shown as 06/18/2026.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
OneIM Acquisition Corp.
(Name of Issuer)
Class A ordinary shares
(Title of Class of Securities)
G6S74K106
(CUSIP Number)
06/11/2026
(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)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
G6S74K106
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
ONTARIO, CANADA
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,812,994.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,812,994.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,812,994.00
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)
6.3 %
12
Type of Reporting Person (See Instructions)
PN, IA, FI
Comment for Type of Reporting Person: Based upon 28,750,000 Class A ordinary shares outstanding, as reported by the Issuer in its current report on Form 10-Q filed with the Securities and Exchange Commission on May 11, 2026.
SCHEDULE 13G
CUSIP Number(s):
G6S74K106
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
875,762.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
875,762.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
875,762.00
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)
3.1 %
12
Type of Reporting Person (See Instructions)
FI
Comment for Type of Reporting Person: Based upon 28,750,000 Class A ordinary shares outstanding, as reported by the Issuer in its current report on Form 10-Q filed with the Securities and Exchange Commission on May 11, 2026.
SCHEDULE 13G
CUSIP Number(s):
G6S74K106
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
271,119.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
271,119.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
271,119.00
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)
0.9 %
12
Type of Reporting Person (See Instructions)
FI
Comment for Type of Reporting Person: Based upon 28,750,000 Class A ordinary shares outstanding, as reported by the Issuer in its current report on Form 10-Q filed with the Securities and Exchange Commission on May 11, 2026.
SCHEDULE 13G
CUSIP Number(s):
G6S74K106
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
ONTARIO, CANADA
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
538,478.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
538,478.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
538,478.00
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: Based upon 28,750,000 Class A ordinary shares outstanding, as reported by the Issuer in its current report on Form 10-Q filed with the Securities and Exchange Commission on May 11, 2026.
SCHEDULE 13G
CUSIP Number(s):
G6S74K106
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
ONTARIO, CANADA
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
127,635.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
127,635.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
127,635.00
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)
3.4 %
12
Type of Reporting Person (See Instructions)
FI
Comment for Type of Reporting Person: Based upon 28,750,000 Class A ordinary shares outstanding, as reported by the Issuer in its current report on Form 10-Q filed with the Securities and Exchange Commission on May 11, 2026.
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
OneIM Acquisition Corp.
(b)
Address of issuer's principal executive offices:
390 PARK AVE., 11TH FLOOR, NEW YORK, NEW YORK, 10022
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 (the "Funds"). 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 contrued 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, 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
(e)
CUSIP Number(s):
G6S74K106
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:
06/18/2026
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:
06/18/2026
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:
06/18/2026
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:
06/18/2026
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.
