Company: KYIV
Filing Date: 2025-07-22
Form Type: 424B3
Source: 0001213900-25-066705
Chunk: 748

Company: Kyivstar Group Ltd.
Filing Date: 2025-07-22
Form: 424B3
Chunk 748
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 Name:                        |     | Betsy Z. Cohen     |
| Title:                       |     | Manager            |

[ Signature Page to Sponsor Agreement ]

Annex C-11

| Cantor Fitzgerald & Co. |     |                                   |
| By:                     |     | /s/ Sage Kelly                    |
| Name:                   |     | Sage Kelly                        |
| Title:                  |     | Global Head of Investment Banking |

[ Signature Page to Sponsor Agreement ]

Annex C-12

| KYIVSTAR GROUP LTD. |     |                    |
| By:                 |     | /s/ Kaan Terzioglu |
| Name:               |     | Kaan Terzioglu     |
| Title:              |     | Director           |

[ Signature Page to Sponsor Agreement ]

Annex C-13

| VEON AMSTERDAM B.V. |     |                      |
| By:                 |     | /s/ Kaan Terzioglu   |
| Name:               |     | Kaan Terzioglu       |
| Title:              |     | Director             |
| By:                 |     | /s/ Maciej Wojtaszek |
| Name:               |     | Maciej Wojtaszek     |
| Title:              |     | Director             |

[ Signature Page to Sponsor Agreement ]

Annex C-14 ANNEX A Sponsors’ New PubCo Common Shares immediately after the Closing [***] Annex C-15 ANNEX B Notices [***] Annex C-16 Annex D EXECUTION VERSION SELLER LOCK-UP AGREEMENT This SELLER LOCK-UP AGREEMENT (this “ Agreement ”) is made and entered into as of March 17, 2025, by and among (1) KYIVSTAR GROUP LTD., an exempted company with limited liability, incorporated and existing under the laws of Bermuda with registration number 202504557, with its registered office at Victoria Place, 31 Victoria Street, Hamilton, HM10, Bermuda, and its principal business address at Index Tower (East Tower), Unit 1703, DIFC (Dubai International Financial Center), United Arab Emirates (“ New PubCo ”); (2) COHEN CIRCLE SPONSOR I, LLC, a Delaware limited liability company (“ CCS I ”), (3) COHEN CIRCLE ADVISORS I, LLC, a Delaware limited liability company (“ CCA I ,” and together with CSS I, the “ Sponsors ”), and (4) VEON AM