Julián Martínez-Simancas

Secretary of the Board of Directors

Bilbao, 21 May 2019

To the National Securities Market Commission

Subject: Periodic information about the share buy­back programme of Iberdrola, S.A.

Dear Sirs,

Reference is made to our notice of significant event (comunicación de hechorelevante) of 19 February2019 (official registry number 274,908), relating to the buy­back programme of own shares approved by the Board of Directors of Iberdrola, S.A. (the "Company") in accordance with the authorisation granted by the General Shareholders' Meeting held on 13 April 2018 under item twelve of its agenda (the "Buy­back Programme").

Pursuant to article 227 of the restated text of the Securities Market Law approved by the Royal Legislative Decree 4/2015, of 23 October (texto refundido de la Ley del Mercado de Valores aprobado por el Real Decreto Legislativo 4/2015, de 23 de octubre) and related provisions, and in accordance with the provisions of 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 stabilisation measures, we hereby inform you that between 14 and 20 May of 2019, the Company has carried out the following transactions over its own shares under the Buy- back Programme:

Date

Security

Transaction

Trading venue

Number of securities

Price (€)

14/05/2019

N/A

N/A

N/A

N/A

N/A

15/05/2019

N/A

N/A

N/A

N/A

N/A

16/05/2019

N/A

N/A

N/A

N/A

N/A

17/05/2019

IBE.MC

Acquisition

XMAD

166,923

8.166

17/05/2019

IBE.MC

Acquisition

CHIX

120,000

8.166

17/05/2019

IBE.MC

Acquisition

BATE

61,500

8.166

17/05/2019

IBE.MC

Acquisition

TRQX

34,020

8.165

20/05/2019

IBE.MC

Acquisition

XMAD

727,817

8.143

20/05/2019

IBE.MC

Acquisition

CHIX

209,349

8.145

20/05/2019

IBE.MC

Acquisition

BATE

79,953

8.143

20/05/2019

IBE.MC

Acquisition

TRQX

49,000

8.146

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

NOTICE: This document is a translation of a duly approv ed Spanish-language document, and is prov ided f or inf ormational purposes only . In the ev ent of any discrepancy between the text of this translation and the text of the original Spanish-language document which this translation is intended to ref lect, the text of the original Spanish-language document shall prev ail.

www.iberdrola.com

Take care of the environment.

Printed in black and w hite and only if necessary

1

This information is provided to you for the appropriate purposes.

Yours faithfully,

Secretary of the Board of Directors

NOTICE: This document is a translation of a duly approv ed Spanish-language document, and is prov ided f or inf ormational purposes only . In the ev ent of any discrepancy between the text of this translation and the text of the original Spanish-language document which this translation is intended to ref lect, the text of the original Spanish-language document shall prev ail.

www.iberdrola.com

Take care of the environment.

Printed in black and w hite and only if necessary

2

ANNEX

Detailed information of all the transactions carried out within the context of the share buy­back

programme of Iberdrola, S.A. between 14 and 20 May 2019

Date

Security

Transaction

Trading

Number of

Price (€)

Broker

venue

securities

17/05/2019

IBE.MC

Acquisition

XMAD

2,278

8.170

J.P. Morgan Securities plc

17/05/2019

IBE.MC

Acquisition

XMAD

26,000

8.166

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

XMAD

19,000

8.164

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

XMAD

56,645

8.170

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

XMAD

23,000

8.168

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

XMAD

10,000

8.162

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

XMAD

7,000

8.160

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

XMAD

6,000

8.158

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

XMAD

8,000

8.156

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

XMAD

7,000

8.154

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

XMAD

2,000

8.152

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

CHIX

28,500

8.166

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

CHIX

13,500

8.164

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

CHIX

37,000

8.170

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

CHIX

15,000

8.168

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

CHIX

7,000

8.162

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

CHIX

2,723

8.160

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

CHIX

5,777

8.158

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

CHIX

6,000

8.156

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

CHIX

4,000

8.154

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

CHIX

500

8.152

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

TRQX

10,400

8.166

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

TRQX

1,400

8.164

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

TRQX

9,120

8.170

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

TRQX

3,000

8.168

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

TRQX

2,000

8.162

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

TRQX

3,600

8.160

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

TRQX

4,000

8.156

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

TRQX

500

8.154

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

BATE

11,500

8.166

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

BATE

8,300

8.164

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

BATE

22,000

8.170

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

BATE

7,700

8.168

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

BATE

1,500

8.162

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

BATE

2,800

8.160

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

BATE

3,700

8.158

Auriga Global Investors, Sociedad de Valores, S.A.

17/05/2019

IBE.MC

Acquisition

BATE

3,500

8.156

Auriga Global Investors, Sociedad de Valores, S.A.

NOTICE: This document is a translation of a duly approv ed Spanish-language document, and is prov ided f or inf ormational purposes only . In the ev ent of any discrepancy between the text of this translation and the text of the original Spanish-language document which this translation is intended to ref lect, the text of the original Spanish-language document shall prev ail.

www.iberdrola.com

Take care of the environment.

Printed in black and w hite and only if necessary

3

17/05/2019

IBE.MC

Acquisition

BATE

500

8.154

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

7,000

8.166

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

6,000

8.164

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

7,000

8.170

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

4,000

8.168

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

4,000

8.162

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

4,000

8.160

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

4,000

8.158

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

4,000

8.156

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

4,000

8.154

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

15,500

8.152

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

9,000

8.172

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

17,000

8.174

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

54,644

8.150

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

61,200

8.148

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

73,847

8.146

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

74,500

8.144

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

84,000

8.142

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

93,000

8.140

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

14,523

8.138

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

15,533

8.136

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

10,653

8.134

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

15,500

8.132

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

23,000

8.130

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

60,700

8.128

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

18,400

8.126

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

XMAD

42,817

8.124

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

3,500

8.166

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

3,000

8.164

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

1,000

8.170

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

3,000

8.168

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

11,500

8.162

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

2,500

8.158

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

3,000

8.156

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

2,000

8.154

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

10,900

8.152

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

2,700

8.172

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

7,500

8.174

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

12,900

8.150

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

16,755

8.148

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

31,900

8.146

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

12,500

8.144

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

11,694

8.142

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

5,300

8.140

Auriga Global Investors, Sociedad de Valores, S.A.

NOTICE: This document is a translation of a duly approv ed Spanish-language document, and is prov ided f or inf ormational purposes only . In the ev ent of any discrepancy between the text of this translation and the text of the original Spanish-language document which this translation is intended to ref lect, the text of the original Spanish-language document shall prev ail.

www.iberdrola.com

Take care of the environment.

Printed in black and w hite and only if necessary

4

20/05/2019

IBE.MC

Acquisition

CHIX

12,700

8.138

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

8,900

8.136

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

7,936

8.134

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

7,064

8.132

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

13,300

8.130

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

10,800

8.128

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

6,100

8.126

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

CHIX

900

8.124

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,000

8.166

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,000

8.164

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,000

8.170

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,000

8.168

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,000

8.162

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,000

8.160

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,000

8.158

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,000

8.156

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,000

8.154

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,000

8.152

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

2,000

8.172

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

3,000

8.174

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

2,000

8.150

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

3,000

8.148

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

4,000

8.146

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

3,000

8.144

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

3,000

8.142

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

2,000

8.140

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,000

8.138

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

4,000

8.136

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,000

8.134

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

1,500

8.132

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

500

8.130

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

3,500

8.128

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

2,500

8.126

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

TRQX

3,000

8.124

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

BATE

1,000

8.164

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

BATE

2,000

8.170

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

BATE

1,000

8.168

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

BATE

2,000

8.162

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

BATE

1,000

8.160

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

BATE

1,000

8.158

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

BATE

1,000

8.156

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

BATE

1,000

8.154

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

BATE

1,000

8.152

Auriga Global Investors, Sociedad de Valores, S.A.

20/05/2019

IBE.MC

Acquisition

BATE

4,000

8.174

Auriga Global Investors, Sociedad de Valores, S.A.

NOTICE: This document is a translation of a duly approv ed Spanish-language document, and is prov ided f or inf ormational purposes only . In the ev ent of any discrepancy between the text of this translation and the text of the original Spanish-language document which this translation is intended to ref lect, the text of the original Spanish-language document shall prev ail.

www.iberdrola.com

Take care of the environment.

Printed in black and w hite and only if necessary

5

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Iberdrola SA published this content on 21 May 2019 and is solely responsible for the information contained herein. Distributed by Public, unedited and unaltered, on 21 May 2019 08:37:02 UTC