As of November 6, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of Cartesian Growth Corp IV. The largest reported stake is CGC IV Sponsor LLC's, at 19.8%. 4 filings are on record since July 2, 2026 (Schedule 13G, August 13, 2026).
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Key facts
- · Reporting person: LMR Partners LLP · Sole voting: 0 · Shared voting: 1,750,000 · Sole dispositive: 0 · Shared dispositive: 1,750,000 · SCHEDULE 13G, 2026-08-14
- · Reporting person: CGC IV Sponsor LLC · Sole voting: 6,775,000 · Shared voting: 0 · Sole dispositive: 6,775,000 · Shared dispositive: 0 · SCHEDULE 13G, 2026-08-13
- · Reporting person: Magnetar Financial LLC · Sole voting: 0 · Shared voting: 1,750,000 · Sole dispositive: 0 · Shared dispositive: 1,750,000 · SCHEDULE 13G, 2026-08-13
- · Reporting person: MMCAP International Inc. SPC · Sole voting: 0 · Shared voting: 2,350,000 · Sole dispositive: 0 · Shared dispositive: 2,350,000 · SCHEDULE 13G, 2026-07-02
Cartesian Growth Corp IV has 4 Schedule 13D or 13G filings on record since 2026-07-02. 4 holders' latest filing reports 5% or more of class a ordinary shares, par value $0.0001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| CGC IV Sponsor LLC | 19.8% | 6,775,000 | SCHEDULE 13G, 2026-08-13 | 2026-06-26 |
| MMCAP International Inc. SPC | 8.5% | 2,350,000 | SCHEDULE 13G, 2026-07-02 | 2026-06-25 |
| LMR Partners LLP | 6.4% | 1,750,000 | SCHEDULE 13G, 2026-08-14 | 2026-06-30 |
| Magnetar Financial LLC | 6.36% | 1,750,000 | SCHEDULE 13G, 2026-08-13 | 2026-06-30 |
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Keep reading
More on Cartesian Growth Corp IV and the records around it.
Companies that share a holder
- LMR Partners LLP also filed stake reports on 44 other companies: BuzzFeed Inc (Aug 2026), Collective Acquisition Corp. II (Aug 2026), Graf Global Corp. (Aug 2026)
- MMCAP International Inc. SPC also filed stake reports on 52 other companies: BHAV Acquisition Corp II (Nov 2026), Haymaker Acquisition Corp V (Sep 2026), Thunder Bridge Capital Partners V, Ltd. (Aug 2026)
- MAGNETAR FINANCIAL LLC also filed stake reports on 97 other companies: Blue Acquisition Corp. (Sep 2026), CENTURION ACQUISITION CORP. (Sep 2026), Churchill Capital Corp IX (Sep 2026)
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What the Full Report on Cartesian Growth Corp IV covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
7 cited sources found
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| CGC IV Sponsor LLC | 6,775,000 | 0 | 6,775,000 | 0 | SCHEDULE 13G, 2026-08-13 |
| Peter Yu | 6,775,000 | 0 | 6,775,000 | 0 | SCHEDULE 13G, 2026-08-13 |
| MMCAP International Inc. SPC | 0 | 2,350,000 | 0 | 2,350,000 | SCHEDULE 13G, 2026-07-02 |
| MM Asset Management Inc. | 0 | 2,350,000 | 0 | 2,350,000 | SCHEDULE 13G, 2026-07-02 |
| LMR Partners LLP | 0 | 1,750,000 | 0 | 1,750,000 | SCHEDULE 13G, 2026-08-14 |
| LMR PARTNERS Ltd | 0 | 1,750,000 | 0 | 1,750,000 | SCHEDULE 13G, 2026-08-14 |
| LMR Partners LLC | 0 | 1,750,000 | 0 | 1,750,000 | SCHEDULE 13G, 2026-08-14 |
| LMR Partners AG | 0 | 1,750,000 | 0 | 1,750,000 | SCHEDULE 13G, 2026-08-14 |
| LMR PARTNERS (DIFC) Ltd | 0 | 1,750,000 | 0 | 1,750,000 | SCHEDULE 13G, 2026-08-14 |
| LMR Partners (Ireland) Limited | 0 | 1,750,000 | 0 | 1,750,000 | SCHEDULE 13G, 2026-08-14 |
| Ben Levine | 0 | 1,750,000 | 0 | 1,750,000 | SCHEDULE 13G, 2026-08-14 |
| Stefan Renold | 0 | 1,750,000 | 0 | 1,750,000 | SCHEDULE 13G, 2026-08-14 |
| Magnetar Financial LLC | 0 | 1,750,000 | 0 | 1,750,000 | SCHEDULE 13G, 2026-08-13 |
| Magnetar Capital Partners LP | 0 | 1,750,000 | 0 | 1,750,000 | SCHEDULE 13G, 2026-08-13 |
| Supernova Management LLC | 0 | 1,750,000 | 0 | 1,750,000 | SCHEDULE 13G, 2026-08-13 |
| David J. Snyderman | 0 | 1,750,000 | 0 | 1,750,000 | SCHEDULE 13G, 2026-08-13 |
The latest filing identifies Cartesian Growth Corp IV by CUSIP G19316127 and gives its principal executive office as 505 Fifth Avenue, 15th Floor, New York, NY 10017 (SCHEDULE 13G, 2026-08-14).
What the percentages are based on
The Class A Ordinary Shares held by each of LMR Master Fund and LMR CCSA Master Fund represent approximately 3.2% and the LMR Shares in the aggregate represent approximately 6.4% of the outstanding Class A Ordinary Shares, based on 27,500,000 Class A Ordinary Shares of the Issuer outstanding as of June 26, 2026, as reported in the Issuer's Form 8-K filed with the Securities and Exchange Commission on July 8, 2026.LMR Partners LLP, SCHEDULE 13G, 2026-08-14
As of June 30, 2026, each of the Reporting Persons were deemed to be the beneficial owner constituting approximately 6.36% of the total number of shares outstanding (based upon the information provided by the Issuer in the Form 8-K filed on July 8, 2026 there were approximately 27,500,000 Shares outstanding).Magnetar Financial LLC, SCHEDULE 13G, 2026-08-13
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2026-07-02 | MMCAP International Inc. SPC | 8.5% | SCHEDULE 13G |
| 2026-08-13 | Magnetar Financial LLC | 6.36% | SCHEDULE 13G |
| 2026-08-13 | CGC IV Sponsor LLC | 19.8% | SCHEDULE 13G |
| 2026-08-14 | LMR Partners LLP | 6.4% | SCHEDULE 13G |
Questions about who owns Cartesian Growth Corp IV
Who owns Cartesian Growth Corp IV?
On this page, 4 holders' latest ownership filings report 5% or more of Cartesian Growth Corp IV: CGC IV Sponsor LLC (19.8%, Schedule 13G, filed 2026-08-13), MMCAP International Inc. SPC (8.5%, Schedule 13G, filed 2026-07-02), LMR Partners LLP (6.4%, Schedule 13G, filed 2026-08-14) and Magnetar Financial LLC (6.36%, Schedule 13G, filed 2026-08-13).
Who are the largest shareholders of Cartesian Growth Corp IV?
By the share each holder's latest filing reports, the largest holders of Cartesian Growth Corp IV on this page are CGC IV Sponsor LLC (19.8%), MMCAP International Inc. SPC (8.5%) and LMR Partners LLP (6.4%).
When did CGC IV Sponsor LLC buy into Cartesian Growth Corp IV?
The filings give report dates, not purchase dates. The earliest filing from CGC IV Sponsor LLC on this page is the Schedule 13G, filed 2026-08-13, reporting 19.8%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 4 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Cartesian Growth Corp IV
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| June 30, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
| June 25, 2026 | IPO filing, Form 424B4 | — | IPO filings | Source |
| June 8, 2026 | IPO filing, Form S-1 | — | IPO filings | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.