Company: NKLR
Filing Date: 2025-09-16
Form Type: 424B3
Source: 0001213900-25-087981
Chunk: 662

Company: Terra Innovatum Global N.V.
Filing Date: 2025-09-16
Form: 424B3
Chunk 662
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| Name:                   |     | Gus Garcia                 |
| Title:                  |     | Co-Chief Executive Officer |
| Location: Austin, Texas |     |                            |

Signature Page to Sponsor Support Agreement

Annex C-7

Accepted and Agreed:

| GSR III ACQUISITION CORP. |     |                            |
| By:                       |     | /s/ Gus Garcia             |
| Name:                     |     | Gus Garcia                 |
| Title:                    |     | Co-Chief Executive Officer |
| Location: Austin, Texas   |     |                            |

Signature Page to Sponsor Support Agreement

Annex C-8

| TERRA INNOVATUM S.R.L. |     |                         |
| By:                    |     | /s/ Alessandro Petruzzi |
| Name:                  |     | Alessandro Petruzzi     |
| Title:                 |     | Chief Executive Officer |
| Location: Lucca, Italy |     |                         |

Signature Page to Sponsor Support Agreement

Annex C-9 Annex D Final Form AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT THIS AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT (this “ Agreement ”), dated as of [•], 2025, is made and entered into by and among GSR III Acquisition Corp. (the “ GSR III ”), Terra Innovatum s.r.l., an Italian Società a responsabilità limitata (“ Terra OpCo ), each individual identified on the signature pages hereto as a “Management Holder” (each, a “ Management Holder ” and together, the “ Management Holders ”) and GSR III Sponsor LLC, a Delaware limited liability company (the “ Sponsor ” and, together the Management Holders, and any person or entity who is identified on the signature pages hereto as a “Holder” or hereafter becomes a party to this Agreement pursuant to Section 6.2 of this Agreement, the “ Holders ” and each, a “ Holder ”). Each capitalized term used, but not defined herein shall have meaning ascribed to such term in the Business Combination Agreement. RECITALS WHEREAS , GSR III, SPAC Advisory Partners, LLC (the “ Underwriter ”) and the Sponsor are party to that certain Registration Rights Agreement, dated as of November 7, 2024 (the “ Original Agreement ”); WHEREAS , GSR III, Terra OpCo and such other parties that will sign joinders to the Business Combination Agreement in accordance