Julián Martínez-Simancas Secretary of the Board of Directors

Bilbao, 15 March 2019

To the National Securities Market Commission

Subject: Periodic information about the share buy-back programme of Iberdrola, S.A.

Dear Sirs,

Reference is made to our notice of significant event (comunicación de hecho relevante) of 19 February 2019

(official registry number 274,908), relating to the buy-back 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 "Buy-back 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 8 and 14 March of 2019, the Company has carried out the following transactions over its own shares under the Buy-back Programme:

Date

Security

Transaction

Trading venueNumber of securitiesPrice (€)

08/03/2019

IBE.MC

Acquisition

XMAD

860,000

7.567

11/03/2019

IBE.MC

Acquisition

XMAD

124,680

7.540

11/03/2019

IBE.MC

Acquisition

CHIX

18,909

7.553

11/03/2019

IBE.MC

Acquisition

BATE

10,760

7.555

11/03/2019

IBE.MC

Acquisition

TRQX

10,457

7.552

12/03/2019

IBE.MC

Acquisition

XMAD

25,291

7.574

12/03/2019

IBE.MC

Acquisition

CHIX

8,935

7.572

12/03/2019

IBE.MC

Acquisition

BATE

3,950

7.576

12/03/2019

IBE.MC

Acquisition

TRQX

3,950

7.576

13/03/2019

IBE.MC

Acquisition

XMAD

964,928

7.609

13/03/2019

IBE.MC

Acquisition

CHIX

445,636

7.609

13/03/2019

IBE.MC

Acquisition

BATE

168,732

7.607

13/03/2019

IBE.MC

Acquisition

TRQX

158,363

7.605

14/03/2019

IBE.MC

Acquisition

XMAD

1,167,425

7.584

14/03/2019

IBE.MC

Acquisition

BATE

6,553

7.592

14/03/2019

IBE.MC

Acquisition

CHIX

18,782

7.592

14/03/2019

IBE.MC

Acquisition

TRQX

13,571

7.592

14/03/2019

IBE.MC

Acquisition

AQXE

4,133

7.592

NOTICE: This document is a translation of a duly approved Spanish-language document, and is provided for informational purposes only. In the event of any discrepancy between the text of this translation and the text of the original Spanish-language document which this translation is intended to reflect, the text of the original Spanish-language document shall prevail.

www.iberdrola.com

Take care of the environment.

Printed in black and white and only if necessary

1

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

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 approved Spanish-language document, and is provided for informational purposes only. In the event of any discrepancy between the text of this translation and the text of the original Spanish-language document which this translation is intended to reflect, the text of the original Spanish-language document shall prevail.

www.iberdrola.com

Take care of the environment.

Printed in black and white and only if necessary

2

ANNEX

Detailed information of all the transactions carried out within the context of the share buy-back programme of Iberdrola, S.A. between 8 and 14 March 2019

DateSecurityTransaction

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

08/03/2019

11/03/2019

11/03/2019

11/03/2019

11/03/2019

11/03/2019

11/03/2019

11/03/2019

11/03/2019

11/03/2019

11/03/2019

11/03/2019

11/03/2019

IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC IBE.MC

Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition Acquisition

Trading venue XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD XMAD

Number of securitiesPrice (€)

Broker

6,869

  • 7.600 Mercados y Gestión de Valores, A.V., S.A.

    5,423

  • 7.598 Mercados y Gestión de Valores, A.V., S.A.

    3,000

  • 7.596 Mercados y Gestión de Valores, A.V., S.A.

    23,577

  • 7.592 Mercados y Gestión de Valores, A.V., S.A.

    11,873

  • 7.588 Mercados y Gestión de Valores, A.V., S.A.

    53,336

  • 7.582 Mercados y Gestión de Valores, A.V., S.A.

    46,027

  • 7.584 Mercados y Gestión de Valores, A.V., S.A.

    7,536

  • 7.586 Mercados y Gestión de Valores, A.V., S.A.

    38,787

  • 7.578 Mercados y Gestión de Valores, A.V., S.A.

    20,006

  • 7.580 Mercados y Gestión de Valores, A.V., S.A.

    10,000

  • 7.576 Mercados y Gestión de Valores, A.V., S.A.

    5,566

  • 7.574 Mercados y Gestión de Valores, A.V., S.A.

    3,000

  • 7.590 Mercados y Gestión de Valores, A.V., S.A.

    35,000

  • 7.572 Mercados y Gestión de Valores, A.V., S.A.

    85,000

  • 7.566 Mercados y Gestión de Valores, A.V., S.A.

    80,000

  • 7.570 Mercados y Gestión de Valores, A.V., S.A.

    35,000

  • 7.556 Mercados y Gestión de Valores, A.V., S.A.

    54,424

  • 7.560 Mercados y Gestión de Valores, A.V., S.A.

    17,000

  • 7.564 Mercados y Gestión de Valores, A.V., S.A.

    15,000

  • 7.550 Mercados y Gestión de Valores, A.V., S.A.

    80,000

  • 7.552 Mercados y Gestión de Valores, A.V., S.A.

    63,576

  • 7.568 Mercados y Gestión de Valores, A.V., S.A.

    25,000

  • 7.562 Mercados y Gestión de Valores, A.V., S.A.

    30,000

  • 7.558 Mercados y Gestión de Valores, A.V., S.A.

    5,000

  • 7.554 Mercados y Gestión de Valores, A.V., S.A.

    100,000

  • 7.548 Mercados y Gestión de Valores, A.V., S.A.

9,408

7.554

8,482

7.556

11,518

7.558

10,266

7.560

9,054

7.552

23,081

7.550

4,529

7.548

13,370

7.544

13,612

7.546

12,161

7.542

6,312

7.540

125

7.536

J.P. Morgan Securities plc J.P. Morgan Securities plc J.P. Morgan Securities plc J.P. Morgan Securities plc J.P. Morgan Securities plc J.P. Morgan Securities plc J.P. Morgan Securities plc J.P. Morgan Securities plc J.P. Morgan Securities plc J.P. Morgan Securities plc J.P. Morgan Securities plc J.P. Morgan Securities plc

NOTICE: This document is a translation of a duly approved Spanish-language document, and is provided for informational purposes only. In the event of any discrepancy between the text of this translation and the text of the original Spanish-language document which this translation is intended to reflect, the text of the original Spanish-language document shall prevail.

www.iberdrola.com

Take care of the environment.

Printed in black and white and only if necessary

3

11/03/2019

IBE.MC

Acquisition

XMAD

2,762

7.538

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

BATE

4,933

7.554

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

BATE

14

7.556

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

BATE

3,387

7.560

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

BATE

2,426

7.548

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

CHIX

4,735

7.554

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

CHIX

574

7.556

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

CHIX

2,946

7.558

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

CHIX

2,762

7.560

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

CHIX

1,973

7.552

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

CHIX

1,973

7.550

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

CHIX

1,973

7.548

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

CHIX

1,973

7.542

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

TRQX

4,538

7.554

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

TRQX

1,973

7.558

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

TRQX

1,973

7.550

J.P. Morgan Securities plc

11/03/2019

IBE.MC

Acquisition

TRQX

1,973

7.544

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

XMAD

6,694

7.580

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

XMAD

1,975

7.576

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

XMAD

4,887

7.578

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

XMAD

1,050

7.570

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

XMAD

2,644

7.566

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

XMAD

2,661

7.560

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

XMAD

1,960

7.572

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

XMAD

3,420

7.574

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

BATE

1,975

7.580

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

BATE

1,975

7.572

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

CHIX

2,875

7.580

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

CHIX

240

7.576

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

CHIX

490

7.578

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

CHIX

4,110

7.566

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

CHIX

1,220

7.572

J.P. Morgan Securities plc

12/03/2019

IBE.MC

Acquisition

TRQX

3,950

7.576

J.P. Morgan Securities plc

13/03/2019

IBE.MC

Acquisition

XMAD

13,795

7.586

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

154,395

7.588

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

84,418

7.590

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

15,987

7.592

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

54,938

7.594

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

58,220

7.596

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

74,092

7.598

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

40,885

7.600

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

14,724

7.602

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

20,333

7.604

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

16,518

7.606

CM Capital Markets Bolsa, S.V., S.A.

NOTICE: This document is a translation of a duly approved Spanish-language document, and is provided for informational purposes only. In the event of any discrepancy between the text of this translation and the text of the original Spanish-language document which this translation is intended to reflect, the text of the original Spanish-language document shall prevail.

www.iberdrola.com

Take care of the environment.

Printed in black and white and only if necessary

4

13/03/2019

IBE.MC

Acquisition

XMAD

16,740

7.608

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

28,823

7.610

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

57,654

7.612

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

15,832

7.614

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

48,129

7.616

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

11,376

7.618

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

9,990

7.620

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

20,122

7.622

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

15,140

7.624

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

24,924

7.626

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

15,016

7.628

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

5,285

7.630

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

1,409

7.634

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

20,997

7.638

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

10,912

7.640

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

5,338

7.642

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

2,789

7.644

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

55,265

7.646

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

2,292

7.648

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

5,038

7.650

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

15,183

7.654

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

1,415

7.656

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

5,124

7.660

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

1,230

7.662

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

1,622

7.664

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

1,848

7.666

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

1,491

7.668

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

5,739

7.670

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

2,500

7.674

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

5,686

7.676

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

XMAD

1,714

7.682

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

4,941

7.586

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

2,000

7.588

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

8,630

7.590

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

2,535

7.592

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

19,511

7.594

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

9,801

7.596

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

36,448

7.598

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

10,488

7.600

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

2,470

7.602

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

2,926

7.604

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

3,535

7.606

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

2,446

7.608

CM Capital Markets Bolsa, S.V., S.A.

13/03/2019

IBE.MC

Acquisition

BATE

2,821

7.610

CM Capital Markets Bolsa, S.V., S.A.

NOTICE: This document is a translation of a duly approved Spanish-language document, and is provided for informational purposes only. In the event of any discrepancy between the text of this translation and the text of the original Spanish-language document which this translation is intended to reflect, the text of the original Spanish-language document shall prevail.

www.iberdrola.com

Take care of the environment.

Printed in black and white and only if necessary

5

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Iberdrola SA published this content on 15 March 2019 and is solely responsible for the information contained herein. Distributed by Public, unedited and unaltered, on 15 March 2019 10:38:07 UTC