FORM 10-Q (MARK ONE)☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2026 ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period fromtoCommission file number: 001-43368 CARTESIAN GROWTH CORPORATION IV (Exact Name of Registrant as Specified in Its Charter) Not Applicable(Former name or former address, if changed since last report) Securities registered pursuant to Section 12(b) of the Act: Check whether the issuer (1) filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act during the past 12 months(or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements forthe past 90 days. Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submittedpursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that theregistrant was required to submit such files). Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smallerreporting company or an emerging growth company. See definitions of “large accelerated filer”, “accelerated filer”, “smaller reportingcompany”, and “emerging growth company” in Rule12b-2 of the Exchange Act. Accelerated filer☐Smaller reporting company☒Emerging growth company☒ Large accelerated filer☐Non-accelerated filer☒ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period forcomplying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes☒No☐ As of August 7, 2026, there were 27,500,000 Class A ordinary shares, $0.0001 par value and 7,187,500 Class B ordinary shares,$0.0001 par value, issued and outstanding. CARTESIAN GROWTH CORPORATION IV FORM 10-Q FOR THE QUARTER ENDED JUNE 30, 2026TABLE OF CONTENTS Part I. Financial InformationItem 1. Financial Statements1Condensed Balance Sheet as of June 30, 2026 (unaudited)1Condensed Statements of Operations for the Three Months Ended June 30, 2026 and for the Period from February20, 2026 (Inception) Through June 30, 2026 (Unaudited)2Condensed Statements of Changes in Shareholders’ Deficit for the Three Months Ended June 30, 2026 and for thePeriod from February 20, 2026 (Inception) Through June 30, 2026 (Unaudited)3Condensed Statement of Cash Flows for the Period from February 20, 2026 (Inception) Through June 30, 2026(Unaudited)4Notes to Condensed Financial Statements (Unaudited)5Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations17Item 3. Quantitative and Qualitative Disclosures Regarding Market Risk19Item 4. Controls and Procedures19Part II. Other InformationItem 1. Legal Proceedings20Item 1A. Risk Factors20Item 2. Unregistered Sales of Equity Securities and Use of Proceeds20Item 3. Defaults Upon Senior Securities20Item 4. Mine Safety Disclosures20Item 5. Other Information20Item 6. Exhibits21Part III. Signatures22 PART I - FINANCIAL INFORMATION CARTESIAN GROWTH CORPORATION IVCONDENSED BALANCE SHEET(UNAUDITED) Commitments and Contingencies (Note6)Class A ordinary shares subject to possible redemption, $0.0001 par value; 27,500,000 shares at redemption value of approximately $10.00 per share275,054,127 (1)On June 26, 2026, the underwriters partially exercised their over-allotment option for 2,500,000 Units, resulting in 625,000founder shares no longer subject to surrender. The remaining 1,250,000-unit over-allotment option expired unexercised on August8, 2026, and the Sponsor surrendered the remaining 312,500 founder shares. The accompanying notes are an integral part of these unaudited condensed financial statements. CARTESIAN GROWTH CORPORATION IVCONDENSED STATEMENTS OF OPERATIONS(UNAUDITED) (1)On June 26, 2026, the underwriters partially exercised their over-allotment option for 2,500,000 Units, resulting in 625,000founder shares no longer subject to surrender. The remaining 1,250,000-unit over-allotment option expired unexercised on August8, 2026, and the Sponsor surrendered the remaining 312,500 founder shares. The accompanying notes are an integral part of these unaudited condensed financial statements. CARTESIAN GROWTH CORPORATION IVCONDENSED STATEMENTS OF CHANGES IN SHAREHOLDERS’ DEFICITFOR THE THREE MONTHS ENDED JUNE 30, 2026AND FOR THE PERIOD FROM FEBRUARY 20, 2026 (INCEPTION) THROUGH JUNE 30, 2026(UNAUDITED) CARTESIAN GROWTH CORPORATION IVCONDENSED STATEMENT OF CASH FLOWSFOR THE PERIOD FROM FEBRUARY 20, 2026 (INCEPTION) THROUGH JUNE 30, 2026(UNAUDITED) Cash flows from operating activities:Net lo