Groupe Bruxelles Lambert SA

Transaction in Own Shares • Mar 3, 2025

Transactions on GBL Shares

Disclosure of transaction on GBL shares from February 24, 2025, until February 28, 2025 (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 February 24, 2025 until February 28, 2025 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: 170,039 GBL shares

Trade date	Number of shares	Average price (EUR)	Lowest price (EUR)	Highest price (EUR)	Amount (EUR)	Market (MIC Code)
02/24/2025	1,334	69.04	68.80	69.25	92,099	AQEU
02/24/2025	6,896	69.01	68.75	69.30	475,870	CEUX
02/24/2025	2,880	68.97	68.75	69.25	198,630	TQEX
02/24/2025	20,755	69.02	68.80	69.30	1,432,431	XBRU
02/25/2025	1,430	69.19	68.95	69.45	98,946	AQEU
02/25/2025	6,813	69.20	68.80	69.45	471,470	CEUX
02/25/2025	2,896	69.23	68.95	69.50	200,504	TQEX
02/25/2025	24,799	69.28	68.85	69.50	1,718,112	XBRU
02/26/2025	1,440	69.98	69.55	70.15	100,778	AQEU
02/26/2025	7,038	69.96	69.55	70.15	492,355	CEUX
02/26/2025	2,580	69.91	69.55	70.15	180,373	TQEX
02/26/2025	22,976	69.93	69.55	70.15	1,606,806	XBRU
02/27/2025	2,438	69.26	69.00	69.60	168,868	AQEU
02/27/2025	10,894	69.26	68.90	69.65	754,552	CEUX
02/27/2025	3,385	69.25	69.05	69.65	234,420	TQEX
02/27/2025	21,248	69.20	68.90	69.65	1,470,457	XBRU
02/28/2025	1,687	68.93	68.70	69.10	116,279	AQEU
02/28/2025	7,286	68.90	68.65	69.15	501,998	CEUX
02/28/2025	3,104	68.89	68.70	69.10	213,820	TQEX
02/28/2025	18,160	68.80	68.65	69.15	1,249,452	XBRU

• The liquidity agreement: 0 GBL share

Sales

GBL, directly and through its subsidiaries, sold during the period from February 24, 2025 until February 28, 2025 included, as part of:

• The liquidity agreement: 0 GBL share

As of February 28, 2025, GBL holds directly and through its subsidiaries 14,145,660 GBL shares representing 10.2% of the issued capital and holds no shares under the liquidity agreement. On that date, 75.1% 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