ACS Actividades de Construccion y Servicios S A : Share buy-back, stabilisation and treasury stock programmes

ACS Actividades de Construcción y Servicios S.A. N.I.F A28004885

Avenida de Pío XII, 102 28036 Madrid

English translation for information purposes only. In the event of a discrepancy, the Spanish-language version prevails.

Madrid, 18 February 2021

Dear Sirs.:

Pursuant to article 227 of the Consolidated Text of the Spanish Securities Market Act (Texto Refundido de la Ley del Mercado de Valores), ACS Actividades de Construcción y Servicios S.A. (the "Company" or "ACS"), reports on the following:

OTHER RELEVANT INFORMATION

Reference is made to our notices to CNMV of other relevant information of 24 February 2020 (official registry number 218), 25 May 2020 (official registry number 2402), 23 June 2020 (official registry number 2953) and 14 August 2020 (official registry number 4065) relating to the buy-back programme of own shares approved by the Board of Directors of ACS on 24 February 2020, (the "Buy-back Programme").

Pursuant to articles 2.2 and 2.3 of Commission Delegated Regulation (EU) 2016/1052, of 8 March 2016, supplementing Regulation (EU) No 596/2014, of the European Parliament and of the Council, with regard to regulatory technical standards for the conditions applicable to buy-back programmes and stabilization measures, we hereby inform you that between 11 and 17 February 2021, the Company has carried out the following transactions over its own shares under the Buy-back Programme:

Date	Security	Trading Venue	Number of Shares	Weighted Avarage Price (€)	Intermediary
11/02/2021	ACS. MC	AQE	61	25,000	SOCIETE GENERALE
11/02/2021	ACS. MC	DXE	240	24,996	SOCIETE GENERALE
11/02/2021	ACS. MC	MAD	285	25,000	SOCIETE GENERALE
11/02/2021	ACS. MC	TQE	80	25,000	SOCIETE GENERALE
12/02/2021	ACS. MC	AQE	85	24,998	SOCIETE GENERALE
12/02/2021	ACS. MC	DXE	114	25,000	SOCIETE GENERALE
12/02/2021	ACS. MC	MAD	663	25,000	SOCIETE GENERALE
12/02/2021	ACS. MC	TQE	80	25,000	SOCIETE GENERALE

Detailed information of the transactions carried out within the referred period attached as annex.

Sincerely,

José Luis del Valle Pérez

Board member - Secretary General

ACS Actividades de Construcción y Servicios S.A. - N.I.F A28004885 Avenida de Pío XII, 102 - 28036 Madrid

Value: ACS.MC

Intermediary: SOCIETE GENERALE

Date	Trading venue	Number of shares	Price € / share
11/02/2021	MAD	81	25,000
11/02/2021	DXE	72	24,990
11/02/2021	DXE	8	24,980
11/02/2021	TQE	80	25,000
11/02/2021	DXE	160	25,000
11/02/2021	MAD	204	25,000
11/02/2021	AQE	61	25,000
12/02/2021	TQE	19	25,000
12/02/2021	DXE	11	25,000
12/02/2021	DXE	28	25,000
12/02/2021	DXE	66	25,000
12/02/2021	DXE	9	25,000
12/02/2021	TQE	54	25,000
12/02/2021	MAD	80	25,000
12/02/2021	AQE	69	25,000
12/02/2021	TQE	7	25,000
12/02/2021	MAD	61	25,000
12/02/2021	MAD	24	25,000
12/02/2021	MAD	58	25,000
12/02/2021	MAD	53	25,000
12/02/2021	MAD	6	25,000
12/02/2021	MAD	5	25,000
12/02/2021	MAD	50	25,000
12/02/2021	MAD	9	25,000
12/02/2021	MAD	73	25,000
12/02/2021	MAD	30	25,000
12/02/2021	MAD	150	25,000
12/02/2021	MAD	55	25,000
12/02/2021	MAD	9	25,000
12/02/2021	AQE	11	24,990
12/02/2021	AQE	5	24,990
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