OneIM Sponsor LLC (OIMAU) discloses 7,187,500 Class B SPAC shares

Rhea-AI Filing Summary

OneIM Sponsor LLC, a 10% owner of OneIM Acquisition Corp., filed an initial Form 3 reporting its beneficial holding of 7,187,500 Class B ordinary shares, par value $0.0001 per share. The holding is reported as directly owned.

The Class B shares will automatically convert into Class A ordinary shares on a one-for-one basis at the time of the company’s initial business combination, subject to certain adjustments, and they have no expiration date. The position includes up to 937,500 Class B shares that may be forfeited depending on the underwriters’ over-allotment.

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

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1. Name and Address of Reporting Person^*

OneIM Sponsor LLC

(Last) (First) (Middle)

C/O ONEIM ACQUISITION CORP.

11TH FLOOR, 390 PARK AVENUE

(Street)

NEW YORK NY 10022

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
01/13/2026

3. Issuer Name and Ticker or Trading Symbol
OneIM Acquisition Corp. [ OIM ]

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

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

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, par value $0.0001 per share.	(1)	(1)	Class A ordinary shares, par value $0.0001 per share.	7,187,500	(1)	D(2)

Explanation of Responses:

1. As described in the Issuer's registration statement on Form S-1 (No. 333-292356), 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 on a one-for-one basis subject to certain adjustments and have no expiration date.

2. These shares represent the shares of Class B ordinary shares held directly by OneIM Sponsor LLC (the "Sponsor"), acquired pursuant to a subscription agreement by and between the Sponsor and the Issuer. The shares of Class B ordinary shares owned by the Sponsor includes up to 937,500 shares which are subject to forfeiture depending on the underwriters' over-allotment.

	/s/ Grigorios Kapenis, Authorized Person	01/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider position does OneIM Sponsor LLC report in OneIM Acquisition Corp. (OIMAU)?

OneIM Sponsor LLC reports beneficial ownership of 7,187,500 Class B ordinary shares of OneIM Acquisition Corp., as disclosed in its Form 3.

How will OneIM Sponsor LLC’s Class B shares in OneIM Acquisition Corp. (OIMAU) convert?

The Class B ordinary shares will automatically convert into Class A ordinary shares on a one-for-one basis at the time of OneIM Acquisition Corp.’s initial business combination, subject to certain adjustments.

Are any of OneIM Sponsor LLC’s Class B shares in OIMAU subject to forfeiture?

Yes. The Form 3 states that the Class B shares held by OneIM Sponsor LLC include up to 937,500 shares that are subject to forfeiture depending on the underwriters’ over-allotment.

Is OneIM Sponsor LLC a 10% owner of OneIM Acquisition Corp. (OIMAU)?

Yes. The reporting information identifies OneIM Sponsor LLC as a 10% owner of OneIM Acquisition Corp.

Does the Form 3 for OneIM Acquisition Corp. report any option or warrant exercises?

No specific option or warrant exercises are reported; the filing discloses beneficial ownership of Class B ordinary shares that automatically convert into Class A shares at the initial business combination.