CGC IV Sponsor discloses 7.09M Class B shares in Cartesian Growth (CGCFU)

Rhea-AI Filing Summary

Cartesian Growth Corp IV filed an initial ownership report showing that CGC IV Sponsor LLC directly holds 7,087,500 Class B ordinary shares. These Class B shares automatically convert into Class A ordinary shares on a one-for-one basis upon the company’s initial business combination or earlier at the holder’s option.

The holding includes up to 937,500 shares that may be forfeited depending on the IPO underwriters’ over-allotment option. The Sponsor is controlled by Chairman and CEO Peter Yu, who may be deemed to share voting and dispositive power but disclaims beneficial ownership beyond his pecuniary interest.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider CGC IV Sponsor LLC, Yu Peter

Role 10% Owner | Chairman and CEO

Type	Security	Shares	Price	Value
holding	Class B ordinary shares	--	--	--

Holdings After Transaction: Class B ordinary shares — 7,087,500 shares (Direct)

Footnotes (1)

1. The Class B ordinary shares of Cartesian Growth Corporation IV (the "Issuer") have no expiration date and will automatically convert into Class A ordinary shares concurrently with or immediately following the consummation of the Issuer's initial business combination, or earlier at the option of the holder, on a one-for-one basis, subject to adjustment, as described in the Registration Statement on Form S-1 (File No. 333-296614) (the "Registration Statement") related to the Issuer's initial public offering (the "IPO"). Includes up to 937,500 shares subject to forfeiture by CGC IV Sponsor LLC (the "Sponsor") depending on the extent to which the IPO underwriters' over-allotment option is exercised, as described in the Registration Statement. Represents 7,087,500 shares held directly by the Sponsor. CGC IV Sponsor Manager LLC is the sole member of the Sponsor and is controlled by Peter Yu. Consequently, Mr. Yu may be deemed to share voting and dispositive control over the securities held by the Sponsor, and thus to share beneficial ownership of such securities. Mr. Yu disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

Key Figures

Class B shares held: 7,087,500 shares Shares subject to forfeiture: 937,500 shares Conversion ratio: 1-for-1 +1 more

4 metrics

Class B shares held 7,087,500 shares Directly held by CGC IV Sponsor LLC

Shares subject to forfeiture 937,500 shares Contingent on IPO underwriters’ over-allotment option

Conversion ratio 1-for-1 Class B ordinary shares into Class A ordinary shares

Exercise/conversion price $0.0000 per share Stated for Class B ordinary shares into Class A

Key Terms

Class B ordinary shares, initial business combination, over-allotment option, beneficial ownership

4 terms

Class B ordinary shares financial

"The Class B ordinary shares of Cartesian Growth Corporation IV have no expiration date and will automatically convert..."

Class B ordinary shares are a type of ownership stake in a company that typically come with different voting rights or privileges compared to other share classes. For investors, they represent a way to hold part of the company’s value and influence its decisions, often with fewer voting rights than Class A shares. Understanding these shares helps investors assess their level of control and potential returns within a company.

initial business combination financial

"...will automatically convert into Class A ordinary shares concurrently with or immediately following the consummation of the Issuer's initial business combination..."

An initial business combination is the deal in which a special-purpose acquisition company (SPAC) merges with or acquires an operating business to bring that business onto public markets. Think of the SPAC as an empty shell that raises money from investors, then uses that cash to buy a private company—this transaction turns the private company into a public one and often changes its ownership, valuation, and access to capital, so investors should watch for shifts in risk, future growth prospects, and shareholder rights.

over-allotment option financial

"Includes up to 937,500 shares subject to forfeiture... depending on the extent to which the IPO underwriters' over-allotment option is exercised..."

An over-allotment option is a special agreement that allows underwriters to sell more shares than initially planned if demand is high. Think of it like a retailer offering extra units of a popular product to meet additional customer interest. This option helps ensure the full sale is completed and can also give investors extra shares if they want more.

beneficial ownership financial

"Mr. Yu may be deemed to share voting and dispositive control... and thus to share beneficial ownership of such securities."

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

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FAQ

What insider ownership does Cartesian Growth Corp IV (CGCFU) report on this Form 3?

The filing reports that CGC IV Sponsor LLC directly holds 7,087,500 Class B ordinary shares of Cartesian Growth Corp IV. These shares give the Sponsor significant equity exposure and are tied to the company’s initial public offering structure and future business combination.

How do the Class B ordinary shares of CGCFU convert into Class A shares?

The Class B ordinary shares automatically convert into Class A ordinary shares concurrently with or immediately after the initial business combination, or earlier at the holder’s option. The conversion ratio is one-for-one, subject to adjustment as described in the company’s S-1 registration statement.

What portion of CGCFU sponsor shares are subject to possible forfeiture?

The holding includes up to 937,500 Class B shares that may be forfeited by CGC IV Sponsor LLC. The forfeiture depends on how much of the IPO underwriters’ over-allotment option is exercised, as outlined in the S-1 registration statement for the IPO.

What is Peter Yu’s relationship to the CGCFU sponsor’s shareholding?

CGC IV Sponsor Manager LLC is the sole member of CGC IV Sponsor LLC and is controlled by Peter Yu. He may be deemed to share voting and dispositive control over the sponsor’s 7,087,500 shares but disclaims beneficial ownership beyond his pecuniary interest.

Do the CGCFU Class B ordinary shares have an expiration date?

The Class B ordinary shares have no expiration date. They remain outstanding until they automatically convert into Class A ordinary shares with the initial business combination or earlier at the holder’s option, based on terms in the IPO registration statement.

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

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

CGC IV Sponsor LLC

(Last) (First) (Middle)

505 FIFTH AVENUE, 15TH FLOOR

(Street)

NEW YORK NEW YORK 10017

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
06/24/2026

3. Issuer Name and Ticker or Trading Symbol
Cartesian Growth Corp IV [ CGCF ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

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

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

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	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	7,087,500(2)	(1)	D(3)

1. Name and Address of Reporting Person^*

CGC IV Sponsor LLC

(Last) (First) (Middle)

505 FIFTH AVENUE, 15TH FLOOR

(Street)

NEW YORK NEW YORK 10017

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Yu Peter

(Last) (First) (Middle)

505 FIFTH AVENUE, 15TH FLOOR

(Street)

NEW YORK NEW YORK 10017

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. The Class B ordinary shares of Cartesian Growth Corporation IV (the "Issuer") have no expiration date and will automatically convert into Class A ordinary shares concurrently with or immediately following the consummation of the Issuer's initial business combination, or earlier at the option of the holder, on a one-for-one basis, subject to adjustment, as described in the Registration Statement on Form S-1 (File No. 333-296614) (the "Registration Statement") related to the Issuer's initial public offering (the "IPO").

2. Includes up to 937,500 shares subject to forfeiture by CGC IV Sponsor LLC (the "Sponsor") depending on the extent to which the IPO underwriters' over-allotment option is exercised, as described in the Registration Statement.

3. Represents 7,087,500 shares held directly by the Sponsor. CGC IV Sponsor Manager LLC is the sole member of the Sponsor and is controlled by Peter Yu. Consequently, Mr. Yu may be deemed to share voting and dispositive control over the securities held by the Sponsor, and thus to share beneficial ownership of such securities. Mr. Yu disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein.

Remarks:

See Exhibit 24.1 - Power of Attorney (CGC IV Sponsor LLC); See Exhibit 24.3 - Power of Attorney (Peter Yu)

	/s/ Yangyang Jia, Attorney-in-Fact	06/24/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)