OTG Acquisition Sponsor LLC - Sep 11, 2025 Form 3 Insider Report for OTG Acquisition Corp. I (OTGA)

Role: 10%+ Owner
Signature: /s/ Steven Siesser, Managing Member of OTG Acquisition Sponsor LLC
Stock symbol: OTGA
Transactions as of: Sep 11, 2025
Transactions value $: $0
Form type: 3
Date filed: 9/11/2025, 07:00 PM
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
OTG Acquisition Sponsor LLC	10%+ Owner	C/O OTG ACQUISITION CORP. I, 12003 CIELO COURT, PALM BEACH GARDENS	/s/ Steven Siesser, Managing Member of OTG Acquisition Sponsor LLC	2025-09-11	0002077978

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	OTGA	Class A ordinary shares, par value $0.0001 per share						500K	Sep 11, 2025	Direct	F1, F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	OTGA	Class B ordinary shares, par value $0.0001 per share							Sep 11, 2025	Class A ordinary shares, par value $0.0001 per share	5.75M		Direct	F1, F3, F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This Form 3 is being filed by OTG Acquisition Sponsor LLC (the "Sponsor"). The Sponsor is controlled by Mr. Steven Siesser, as a result of his role as managing member of the Sponsor. As a result, Mr. Siesser may be deemed to have beneficial ownership of the Class B ordinary shares and the Private Placement Units (as defined below) (including the Private Placement Shares (as defined below) included in such units) held by the Sponsor. Mr. Siesser disclaims such beneficial ownership except to the extent of the Sponsor's pecuniary interest therein.
F2	Represents Class A ordinary shares, par value $0.0001 per share, of the Issuer (the "Private Placement Shares") that are included in the 500,000 private placement units (the "Private Placement Units") that will be purchased by the Sponsor from the Issuer in a private placement at $10.00 per Private Placement Unit, as described in the Issuer's registration statement on Form S-1 (File No. 333-289828) (the "Registration Statement"). Each Private Placement Unit is comprised of one Private Placement Share and one-half of one warrant (the "Private Placement Warrants"), each whole Private Placement Warrant exercisable to purchase one Private Placement Share. Does not represent any Private Placement Shares issuable upon the exercise of Private Placement Warrants.
F3	Pursuant to the Issuer's amended and restated memorandum and articles of association, the Class B ordinary shares have no expiration date and will automatically convert into Class A ordinary shares at the time of the Issuer's initial business combination on a one-for-one basis subject to adjustment pursuant to certain anti-dilution rights.
F4	The Class B ordinary shares reported herein include up to 750,000 Class B ordinary shares that are subject to forfeiture to the extent the underwriters of the initial public offering of the Issuer's securities do not exercise in full their over-allotment option, as described in the Registration Statement. The over-allotment option of the underwriters expires 45 days from the date of the final prospectus related to the Issuer's initial public offering.

Remarks:

Exhibit 24 - Power of Attorney