Groupe Bruxelles Lambert SA

Transaction in Own Shares • Dec 9, 2024

Transactions on GBL Shares

Disclosure of transaction on GBL shares from December 2, 2024 until December 6, 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 December 2, 2024 until December 6, 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: 103,639 GBL shares

Trade date	Number of shares	Average price (EUR)	Lowest price (EUR)	Highest price (EUR)	Amount (EUR)	Market (MIC Code)
12/02/2024	811	65.43	65.15	65.60	53,068	AQEU
12/02/2024	5,548	65.41	65.20	65.65	362,893	CEUX
12/02/2024	1,532	65.42	65.20	65.60	100,230	TQEX
12/02/2024	13,548	65.34	65.15	65.60	885,179	XBRU
12/03/2024	1,028	65.37	65.05	65.70	67,204	AQEU
12/03/2024	6,292	65.36	65.05	65.90	411,229	CEUX
12/03/2024	1,808	65.40	65.00	65.85	118,239	TQEX
12/03/2024	13,000	65.29	65.05	65.90	848,743	XBRU
12/04/2024	1,272	65.54	65.25	65.70	83,362	AQEU
12/04/2024	6,732	65.44	65.10	65.70	440,549	CEUX
12/04/2024	1,409	65.45	65.20	65.60	92,217	TQEX
12/04/2024	10,078	65.51	65.10	65.60	660,183	XBRU
12/05/2024	1,264	65.70	65.55	65.85	83,043	AQEU
12/05/2024	3,538	65.71	65.60	65.85	232,499	CEUX
12/05/2024	1,355	65.71	65.55	65.85	89,032	TQEX
12/05/2024	10,790	65.73	65.60	65.85	709,271	XBRU
12/06/2024	1,298	66.04	65.85	66.15	85,724	AQEU
12/06/2024	5,961	66.05	65.85	66.15	393,732	CEUX
12/06/2024	1,751	66.04	65.85	66.15	115,636	TQEX
12/06/2024	14,624	66.07	65.85	66.15	966,247	XBRU

• The liquidity agreement: 0 GBL share

Sales

GBL, directly and through its subsidiaries, sold during the period from December 2, 2024 until December 6, 2024 included, as part of:

• The liquidity agreement: 0 GBL share

As of December 6, 2024, GBL holds directly and through its subsidiaries 12,533,439 GBL shares representing 9.1% of the issued capital and holds no shares under the liquidity agreement. On that date, 53.6% 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