JOINT FILING AGREEMENT
EXHIBIT 99.1
The undersigned hereby agree that the statement on Schedule 13G with respect to the Shares of CARTESIAN GROWTH CORP IV dated as of June 30, 2026 is, and any amendments thereto (including amendments on Schedule 13G) signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the previsions of Rule13d-1(k) under the Securities Exchange Act of 1934, as amended.
| Date: August 13, 2026 | magnetar financial llc | |
| By: | Magnetar Capital Partners LP, its Sole Member | |
| By: | /s/ ▇▇▇▇▇▇ ▇▇▇▇▇ | |
| Name: | ▇▇▇▇▇▇ ▇▇▇▇▇ | |
| Title: | Attorney-in-fact for ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇, Administrative Manager of Supernova Management LLC | |
| Date: August 13, 2026 | magnetar capital partners LP | |
| By: | Supernova Management LLC, its General Partner | |
| By: | /s/ ▇▇▇▇▇▇ ▇▇▇▇▇ | |
| Name: | ▇▇▇▇▇▇ ▇▇▇▇▇ | |
| Title: | Attorney-in-fact for ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇, Administrative Manager of Supernova Management LLC | |
| Date: August 13, 2026 | supernova management llc | |
| By: | /s/ ▇▇▇▇▇▇ ▇▇▇▇▇ | |
| Name: | ▇▇▇▇▇▇ ▇▇▇▇▇ | |
| Title: | Attorney-in-fact for ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇, Administrative Manager | |
| Date: August 13, 2026 | ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇ | |
| By: | /s/ ▇▇▇▇▇▇ ▇▇▇▇▇ | |
| Name: | ▇▇▇▇▇▇ ▇▇▇▇▇ | |
| Title: | Attorney-in-fact for ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇ | |