Company: KYIV
Filing Date: 2025-06-05
Form Type: F-4
Source: 0001213900-25-051575
Chunk: 744

Company: Kyivstar Group Ltd.
Filing Date: 2025-06-05
Form: F-4
Chunk 744
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 or (c) if sent by any other method approved by the recipient, upon the recipient giving written confirmation of receipt. Any party may change any of its notice details by giving written notice of such to each other party. Such notice shall take effect two Business Days after it is given (or on any later date specified in such notice). This Section 4.11 does not apply to the formal service of any court proceedings. 4.12 Counterparts . This Agreement may be executed in counterparts, all of which shall be considered one and the same document and shall become effective when such counterparts have been signed by each of the Parties and delivered to the other Parties, it being understood that all Parties need not sign the same counterpart. Delivery by electronic transmission to counsel for the other Parties of a counterpart executed by a Party shall be deemed to meet the requirements of the previous sentence. The exchange of a fully executed Agreement (in counterparts or otherwise) in pdf, DocuSign or similar format and transmitted by facsimile or email shall be constitute an original, and all of which taken together shall constitute one and the same instrument. 4.13 Entire Agreement . This Agreement and the agreements referenced herein constitute the entire agreement and understanding of the parties hereto in respect of the subject matter hereof and supersedes all prior understandings, agreements or representations by or among the parties hereto to the extent they relate in any way to the subject matter hereof. 4.14 No Third-Party Beneficiaries . This Agreement is not intended to confer upon any other Person other than the Parties any rights or remedies. [ Signature Page Follows ] Annex D-5

IN WITNESS WHEREOF, the parties hereto have each caused this Seller Lock-Up Agreement to be duly executed as of the date first written above.

| COHEN CIRCLE SPONSOR I, LLC |     |                      |
| By:                         |     | /s/ Betsy Z. Cohen   |
|                             |     | Name: Betsy Z. Cohen |
|                             |     | Title:   Manager     |

| COHEN CIRCLE ADVISORS I, LLC |     |                      |
| By:                          |     | /s/ Betsy Z. Cohen   |
|                              |     | Name: Betsy Z. Cohen |
|                              |     | Title:   Manager     |

[ Signature Page to Seller Lock-Up Agreement ]

Annex D-6

| KYIVSTAR GROUP LTD. |     |                      |
| By:                 |