Groupe Bruxelles Lambert : Transactions on GBL shares from May 25, 2026, until May 29, 2026 (included)

June 1, 2026 - After 5:45pm CET

Regulated information

Delivering meaningful growth

Transactions on GBL Shares

Disclosure of transaction on GBL shares from May 25, 2026, until May 29, 2026 (included)

Implementation of the authorization of the Extraordinary General Shareholders' Meeting of May 7, 2026

Purchases

GBL, directly and through its subsidiaries, acquired during the period from May 25, 2026 until May 29, 2026 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 July 31, 2026) in the central order book of a regulated market or MTF: 64,195 GBL shares

  Trade date

  Number of shares

  Average price (EUR)

  Lowest price (EUR)

  Highest price (EUR)

  Amount (EUR)

  Market (MIC Code)

  05/25/2026	700	81.96	81.30	82.20	57,372	AQEU
  05/25/2026	3,869	81.97	81.35	82.20	317,142	CEUX
  05/25/2026	688	81.90	81.45	82.20	56,347	TQEX
  05/25/2026	4,076	81.84	81.35	82.20	333,580	XBRU
  05/26/2026	1,500	81.01	80.50	81.60	121,515	AQEU
  05/26/2026	5,863	81.04	80.55	81.65	475,138	CEUX
  05/26/2026	1,300	81.01	80.50	81.65	105,313	TQEX
  05/26/2026	2,953	81.04	80.50	81.65	239,311	XBRU
  05/27/2026	1,343	81.41	80.90	81.70	109,334	AQEU
  05/27/2026	5,068	81.44	80.85	81.75	412,738	CEUX
  05/27/2026	1,100	81.39	80.90	81.70	89,529	TQEX
  05/27/2026	11,234	81.03	80.90	81.70	910,291	XBRU
  05/28/2026	1,400	80.36	80.05	80.80	112,504	AQEU
  05/28/2026	6,649	80.36	80.05	80.80	534,314	CEUX
  05/28/2026	1,197	80.35	80.10	80.75	96,179	TQEX
  05/28/2026	3,958	80.37	80.05	80.85	318,104	XBRU
  05/29/2026	1,400	80.37	80.00	80.80	112,518	AQEU
  05/29/2026	6,032	80.30	80.00	80.80	484,370	CEUX
  05/29/2026	1,161	80.37	80.00	80.75	93,310	TQEX
  05/29/2026	2,704	80.31	80.00	80.75	217,158	XBRU
  Total	64,195	80.94			5,196,066

• The liquidity agreement: 0 GBL share

  
  
  

  Sales

  GBL, directly and through its subsidiaries, sold during the period from May 25, 2026 until May 29, 2026 included, as part of:

• The liquidity agreement: 0 GBL share

As of May 29, 2026, GBL holds directly and through its subsidiaries 9,839,059 GBL shares representing 7.6% of the issued capital and holds no shares under the liquidity agreement. On that date, 39.5% of the eighth 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 598.9 million envelope, the liquidity contract with an independent financial institution has been suspended for an indefinite period.

For more information, please contact:

Xavier Likin Alison Donohoe

Chief Financial Officer Head of Investor Relations

Tel: [phone] Tel: [phone]

[e-mail] [e-mail]

About Groupe Bruxelles Lambert

Groupe Bruxelles Lambert ("GBL") is an established investment holding company, with over seventy years of stock exchange listing and a net asset value of €13.3bn at the end of March 2026. As a leading and active investor in Europe, GBL focuses on long-term value creation with the support of a stable family shareholder base.

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

Regulated information of June 1, 2026 // Page