SES S.A.: SES: NOTIFICATION OF MAJOR HOLDINGS

Regulatory News:

Filing reference	15278
Submitted at (Luxembourg time)	2026-08-17 18:38

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

SES S.A.

2. Reason for the notification:

An acquisition or disposal of voting rights

3. Details of person subject to the notification obligation:

Name: Davide Leone and Partners Investment Company Limited

City and country of registered office (if applicable): London, UK

4. Full name of shareholder(s):

The person is the same as the person subject to the notification (section 3)

5. Date on which the threshold was crossed or reached:

2026-08-13

6. Total positions of person(s) subject to the notification obligation:

	of voting rights attached to shares (total of 7.A)	of voting rights through financial instruments (total of 7.B.1 7.B.2)	Total of both in (7.A 7.B)	Total number of voting rights of issuer
Resulting situation on the date on which threshold was crossed or reached	5.01	0.00	5.01	521,257,776
Position of previous notification (if applicable)	N/A

7. Notified details of the resulting situation on the date on which the threshold was crossed or reached:

A: Voting rights attached to shares

Class/type of shares (ISIN code if possible)	Number of voting rights direct	Number of voting rights indirect	of voting rights direct	of voting rights indirect
LU0088087324	0	26,115,926	0.00	5.01
SUBTOTAL A (Direct Indirect)	26,115,926		5.01

B.1: Financial Instruments according to Art. 12(1)(a) of the Transparency Law

Type of financial instrument	Expiration date	Exercise/ Conversion Period	Number of voting rights that may be acquired if the instrument is exercised/ converted	of voting rights
N/A

B.2: Financial Instruments with similar economic effect according to Art. 12(1)(b) of the Transparency Law

Type of financial instrument	Expiration date	Exercise/Conversion Period	Physical or cash settlement	Number of voting rights	of voting rights
N/A

8. Information in relation to the person subject to the notification obligation:

Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person or legal entity:

N	Name	of voting rights held by ultimate controlling person or entity or held directly by any subsidiary if it equals or is higher than the notifiable threshold	of voting rights through financial instruments held by ultimate controlling person or entity or held directly by any subsidiary if it equals or is higher than the notifiable threshold	Total of both	Directly controlled by (use number(s) from 1st column)
0	N/A	0.00	0.00	0.00

9. In case of proxy voting:

N/A

10. Additional information:

N/A

View source version on businesswire.com: https://www.businesswire.com/news/home/20260901178035/en/

Contacts:

SES
Evgenia Paliy
Senior Legal Counsel Company Secretary
Tel. [phone]
[e-mail]