Groupe Bruxelles Lambert SA

Transaction in Own Shares • Nov 12, 2024

Transactions on GBL Shares

Disclosure of transaction on GBL shares from November 4, 2024until November 8, 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 4, 2024 until November 8, 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 November 8, 2024) in the central order book of a regulated market or MTF: 133,444 GBL shares

Trade date	Number of shares	Average price (EUR)	Lowest price (EUR)	Highest price (EUR)	Amount (EUR)	Negotiation method / market
11/04/2024	26,957	66.69	66.50	67.10	1,797,706	Stock Exchange CBOE, Turquoise, Euronext
11/05/2024	11,963	66.54	66.35	66.85	795,976	Stock Exchange CBOE, Turquoise, Euronext
11/06/2024	32,905	66.21	65.40	67.35	2,178,538	Stock Exchange CBOE, Turquoise, Euronext
11/07/2024	33,468	66.93	65.15	67.25	2,239,896	Stock Exchange CBOE, Turquoise, Euronext
11/08/2024	28,151	66.61	66.05	67.10	1,875,048	Stock Exchange CBOE, Turquoise, Euronext
Total	133,444	66.60			8,887,163

• The liquidity agreement: 0 GBL share

Sales

GBL, directly and through its subsidiaries, sold during the period from November 4, 2024 until November 8, 2024 included, as part of:

• The liquidity agreement: 0 GBL share

As of November 8, 2024, GBL holds directly and through its subsidiaries 12,075,009 GBL shares representing 8.7% of the issued capital and holds no shares under the liquidity agreement. On that date, 47.7% 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