Cartesian Growth Corp IV (CGCFU) backer reports 19.8% stake via Class B shares

Rhea-AI Filing Summary

CGC IV Sponsor LLC, together with Peter Yu, reports beneficial ownership of Cartesian Growth Corp IV’s equity. The sponsor holds 6,775,000 Class B ordinary shares, which on an as-converted basis represent 19.8% of the issuer’s outstanding Class A ordinary shares.

The Class B shares automatically convert into Class A shares on a one-for-one basis upon completion of Cartesian Growth Corp IV’s initial business combination or earlier at the holder’s option, with no expiration date. Peter Yu controls the sponsor’s managing entity, and may be deemed to share voting and dispositive power, as well as an economic interest, over these securities.

Key Figures

Beneficially owned shares: 6,775,000 Class B ordinary shares Ownership percentage: 19.8% Shares outstanding: 27,500,000 Class A Shares +2 more

5 metrics

Beneficially owned shares 6,775,000 Class B ordinary shares Held by CGC IV Sponsor LLC, convertible into Class A shares

Ownership percentage 19.8% Beneficial ownership of Class A ordinary shares on an as-converted basis

Shares outstanding 27,500,000 Class A Shares Outstanding as of August 7, 2026, used to calculate ownership percentage

Conversion ratio One-for-one Class B ordinary shares convert into Class A ordinary shares

CUSIP G19316101 Identifier for Cartesian Growth Corp IV Class A ordinary shares

Key Terms

beneficial ownership, Class B ordinary shares, as-converted basis, initial business combination, +1 more

5 terms

beneficial ownership financial

"The aggregate percentage of Class A Shares beneficially owned by each of the Reporting Persons"

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.

Class B ordinary shares financial

"CGC IV Sponsor LLC holds 6,775,000 Class B ordinary shares, par value $0.0001 per share"

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.

as-converted basis financial

"representing 19.8% of the outstanding Class A Shares, on an as-converted basis"

As-converted basis means counting securities that can become common stock—like convertible bonds or preferred shares—as if they already were common shares when calculating totals such as shares outstanding, ownership percentages, or per-share metrics. Investors use it to see the potential dilution and the “what-if” size of the shareholder base; it’s like imagining all restaurant coupons have been redeemed so you know how crowded the table could become and how slices of the pie would shrink.

initial business combination financial

"The Class B Shares will automatically convert into Class A 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.

voting and dispositive control financial

"Mr. Yu may be deemed to share voting and dispositive control over the securities held by the Sponsor"

FAQ

What stake in Cartesian Growth Corp IV (CGCFU) does CGC IV Sponsor LLC report?

CGC IV Sponsor LLC reports beneficial ownership of 6,775,000 Class B ordinary shares of Cartesian Growth Corp IV, representing 19.8% of the outstanding Class A ordinary shares on an as-converted basis, based on 27,500,000 Class A shares outstanding.

How are CGC IV Sponsor LLC’s Class B shares in Cartesian Growth Corp IV (CGCFU) treated?

The sponsor’s Class B ordinary shares will automatically convert into Class A shares on a one-for-one basis concurrently with or immediately after the initial business combination, or earlier at the holder’s option, and have no expiration date.

What percentage of Cartesian Growth Corp IV (CGCFU) is owned by the reporting persons?

The reporting persons disclose beneficial ownership of 19.8% of Cartesian Growth Corp IV’s Class A ordinary shares on an as-converted basis, calculated using 27,500,000 Class A shares outstanding as of August 7, 2026, plus shares issuable upon conversion of the Class B shares.

What is Peter Yu’s relationship to CGC IV Sponsor LLC in the Cartesian Growth Corp IV (CGCFU) filing?

Peter Yu is identified as controlling CGC IV Sponsor Manager LLC, the sole member of CGC IV Sponsor LLC. Through this control, he may be deemed to share voting and dispositive power and beneficial ownership over the shares held by the sponsor.

What class of securities is reported in the Cartesian Growth Corp IV (CGCFU) Schedule 13G?

The filing covers Cartesian Growth Corp IV Class A ordinary shares, par value $0.0001 per share, CUSIP G19316101. The reported holdings are Class B shares that are convertible into Class A shares on a one-for-one basis.

On what share count is the 19.8% ownership of Cartesian Growth Corp IV (CGCFU) based?

The 19.8% beneficial ownership figure is calculated using 27,500,000 Class A shares outstanding as of August 7, 2026, as reported by Cartesian Growth Corp IV, adjusted to include the Class A shares issuable upon conversion of the sponsor’s Class B shares.

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Available on EDGAR 08/13/2026 - 08:01 AM Accepted by SEC EDGAR 08/13/2026 - 08:00 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Cartesian Growth Corp IV

(Name of Issuer)

Class A Ordinary Shares, par value $0.0001 per share

(Title of Class of Securities)

G19316101

(CUSIP Number)

06/26/2026

(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): G19316101

1

Names of Reporting Persons

CGC IV Sponsor LLC

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 6,775,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 6,775,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

6,775,000.00

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)

19.8 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP Number(s): G19316101

1

Names of Reporting Persons

Peter Yu

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 6,775,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 6,775,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

6,775,000.00

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)

19.8 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Cartesian Growth Corp IV
(b)	Address of issuer's principal executive offices: 505 Fifth Avenue, 15th Floor, New York, NY 10017
Item 2.
(a)	Name of person filing: This statement is filed on behalf of each of the following persons (collectively, the "Reporting Persons"): (i) CGC IV Sponsor LLC (ii) Peter Yu
(b)	Address or principal business office or, if none, residence: The principal business address of each of the Reporting Persons is 505 Fifth Avenue, 15th Floor, New York, NY 10017.
(c)	Citizenship: CGC IV Sponsor LLC is a Delaware limited liability company, and Peter Yu is a citizen of the United States of America.
(d)	Title of class of securities: Class A Ordinary Shares, par value $0.0001 per share
(e)	CUSIP Number(s): G19316101
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: The information required by Items 4(a) - (c) is set forth in Rows (5) - (11) of the cover page for each Reporting Person and is incorporated herein by reference for each Reporting Person. CGC IV Sponsor LLC (the "Sponsor") holds 6,775,000 Class B ordinary shares, par value $0.0001 per share, of the Issuer (the "Class B Shares"), representing 19.8% of the outstanding Class A Shares, on an as-converted basis. The Class B Shares will automatically convert into Class A 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 set forth in the Issuer's registration statement on Form S-1 (File No. 333-296614) and have no expiration date. The securities described above are 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 also has an economic interest in the Sponsor. Mr. Sorrells disclaims any beneficial ownership of the securities held by the Sponsor other than to the extent of his pecuniary interest therein. The aggregate percentage of Class A Shares beneficially owned by each of the Reporting Persons is calculated based upon 27,500,000 Class A Shares outstanding as of August 7, 2026, as reported by the Issuer in its Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 12, 2026, adjusted for the Class A Shares issuable upon conversion of the Class B Shares held by the Sponsor.
(b)	Percent of class: See 4(a)
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See 4(a)
	(ii) Shared power to vote or to direct the vote: See 4(a)
	(iii) Sole power to dispose or to direct the disposition of: See 4(a)
	(iv) Shared power to dispose or to direct the disposition of: See 4(a)
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:
	N/A

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.

CGC IV Sponsor LLC

Signature:	/s/ Peter Yu
Name/Title:	Peter Yu/Manager
Date:	08/13/2026

Peter Yu

Signature:	/s/ Peter Yu
Name/Title:	Peter Yu
Date:	08/13/2026

Exhibit Information

Exhibit 1 - Joint Filing Agreement