Groupe Bruxelles Lambert SA

Transaction in Own Shares • Dec 2, 2024

Transactions on GBL Shares

Disclosure of transaction on GBL shares from November 25, 2024 until November 29, 2024 (included) Implementation of the authorization of the Extraordinary General Shareholders' Meeting of April 28, 2020

Purchases

GBL, directly and through its subsidiaries, acquired during the period from November 25, 2024 until November 29, 2024 included, as part of:

• The share buyback program: 0 GBL share
• The share buyback program by an independent financial institution on the basis of a discretionary mandate (until March 14, 2025) in the central order book of a regulated market or MTF: 93,052 GBL shares

Trade date	Number of shares	Average price (EUR)	Lowest price (EUR)	Highest price (EUR)	Amount (EUR)	Market (MIC Code)
11/25/2024	1,108	65.41	65.15	65.85	72,478	AQEU
11/25/2024	7,900	65.45	65.15	65.90	517,082	CEUX
11/25/2024	2,026	65.45	65.20	65.85	132,597	TQEX
11/25/2024	18,750	65.48	65.15	65.90	1,227,679	XBRU
11/26/2024	810	65.23	65.00	65.45	52,836	AQEU
11/26/2024	5,850	65.25	65.00	65.55	381,737	CEUX
11/26/2024	1,189	65.24	65.00	65.55	77,568	TQEX
11/26/2024	12,204	65.21	65.00	65.55	795,765	XBRU
11/27/2024	903	65.04	64.80	65.20	58,729	AQEU
11/27/2024	4,528	65.05	64.75	65.20	294,562	CEUX
11/27/2024	1,714	65.05	64.85	65.20	111,495	TQEX
11/27/2024	4,836	65.02	64.75	65.20	314,457	XBRU
11/28/2024	2,001	65.32	65.20	65.50	130,700	AQEU
11/28/2024	2,116	65.40	65.20	65.55	138,380	CEUX
11/28/2024	941	65.41	65.25	65.55	61,548	TQEX
11/28/2024	5,023	65.40	65.20	65.55	328,528	XBRU
11/29/2024	1,570	65.35	65.20	65.55	102,604	AQEU
11/29/2024	8,901	65.38	65.20	65.55	581,969	CEUX
11/29/2024	2,282	65.37	65.20	65.55	149,184	TQEX
11/29/2024	8,400	65.36	65.20	65.55	549,017	XBRU

• The liquidity agreement: 0 GBL share

Sales

GBL, directly and through its subsidiaries, sold during the period from November 25, 2024 until November 29, 2024 included, as part of:

• The liquidity agreement: 0 GBL share

As of November 29, 2024, GBL holds directly and through its subsidiaries 12,429,800 GBL shares representing 9.0% of the issued capital and holds no shares under the liquidity agreement. On that date, 52.3% of the seventh share buyback program is executed1.

Following GBL's decision to use the safe harbour2 regime for the on-the-market share buybacks in the context of a EUR 500 million envelope, the liquidity contract with an independent financial institution has been suspended for an indefinite period.

For more information, please contact:

Tel: +32 2 289 17 72 Tel: +32 2 289 17 64 xlikin@gbl.com adonohoe@gbl.com

Xavier Likin Alison Donohoe

Chief Financial Officer Head of Investor Relations

About Groupe Bruxelles Lambert

Groupe Bruxelles Lambert ("GBL") is an established investment holding company, with seventy years of stock exchange listing and a net asset value of €16.3bn at the end of September 2024. As a leading and active investor in Europe, GBL focuses on long-term value creation with the support of a stable family shareholder base. As a responsible company and investor, GBL perceives ESG factors as being inextricably linked to value creation.

GBL aims to grow its diversified high-quality portfolio of listed, private and alternative investments.

GBL is focused on delivering meaningful growth by providing attractive returns to its shareholders through a combination of growth in its net asset value per share, a sustainable dividend and share buybacks.

GBL is listed on Euronext Brussels (Ticker: GBLB BB; ISIN code: BE0003797140) and is included in the BEL20 index.

¹ cf. http://www.gbl.com/en/transactions-gbl-shares

² Provided for in Regulation (EU) No. 596/2014 of 16 April 2014 on market abuse and Delegated Regulation (EU) No. 2016/1052 of 8 March 2016 with regard to regulatory technical standards for the terms of buyback programs and stabilization measures