Julián Martínez-Simancas

Secretary of the Board of Directors

Bilbao, May 22, 2017

To the National Securities Market Commission

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

Dear Sirs,

Reference is made to our notice of significant event (comunicación de hecho relevante) of 21 February 2017 (official registry number 248,327), 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 28 March 2014, under item nine of the agenda (the "Buy-back Programme").

Pursuant to article 17 of Regulation (EU) No. 596/2014 on market abuse and article 228 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 (the "Regulation 2016/1052"), we hereby inform you that between 11 and 22 May of 2017, the Company has carried out the following transactions over its own shares under the Buy-back Programme:

Date

Security

Transaction

Number of securities

Price (€)

11/5/2017

IBE.MC

Acquisitions

3,441,572

6.7402

12/5/2017

IBE.MC

Acquisitions

245,172

6.7060

15/5/2017

IBE.MC

Acquisitions

646,145

6.7397

16/5/2017

IBE.MC

Acquisitions

25,000

6.7602

17/5/2017

IBE.MC

Acquisitions

1,846,547

6.8313

18/5/2017

IBE.MC

Acquisitions

1,425,540

6.7914

19/5/2017

IBE.MC

Acquisitions

159,770

6.9365

22/5/2017

IBE.MC

Acquisitions

1,141,468

6.9267

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

Likewise, we inform you that under the Buy-back Programme, the Company has acquired a total of 31,035,687 own shares, representing approximately 0.480 % of its share capital. These shares, in addition to the shares that the Company held prior to the commencement of the Buy-back Programme, suffice to fully comply with the objectives of reducing the share capital of the Company described in the Buy-back Programme.

The acquisition of own shares under the Buy-back Programme has been communicated on a regular basis, in accordance with the provisions of articles 2.2 and 2.3 of Regulation 2016/1052, and has been carried out pursuant to the terms and conditions established in such regulation.

In light of the above, Iberdrola has concluded today the Buy-back Programme as the purpose for which it was launched has been fully accomplished.

We also hereby inform you that the execution of the share capital reduction, approved by the General Shareholders' Meeting of Iberdrola of 31 March 2017 under item fourteen of the agenda, is expected to take place within one month from the date of conclusion of the programme (that is, before 22 June 2017). In this regard, the following shares will be redeemed: (i) 31,035,687 shares, representing approximately 0.480 % of Iberdrola's share capital, acquired under the Share Buy-back Programme; and (ii) 188,954,313 shares held by Iberdrola as treasury shares before the start of the Buy-back Programme, representing approximately 2.925 % of its share capital.

This information is provided to you for the appropriate purposes. Yours faithfully,

Secretary of the Board of Directors

ANNEX Detailed information of all the transactions carried out within the context of the share buy-back programme of Iberdrola, S.A. between 11 and 22 May 2017

Date

Security

Transaction

Number of securities

Price (€)

Broker

11/5/2017

IBE.MC

Acquisition

107,713

6.760

UBS Limited

11/5/2017

IBE.MC

Acquisition

10,000

6.761

UBS Limited

11/5/2017

IBE.MC

Acquisition

28,043

6.761

UBS Limited

11/5/2017

IBE.MC

Acquisition

184,718

6.762

UBS Limited

11/5/2017

IBE.MC

Acquisition

31,243

6.763

UBS Limited

11/5/2017

IBE.MC

Acquisition

9,193

6.764

UBS Limited

11/5/2017

IBE.MC

Acquisition

155,544

6.765

UBS Limited

11/5/2017

IBE.MC

Acquisition

10,609

6.766

UBS Limited

11/5/2017

IBE.MC

Acquisition

7,979

6.767

UBS Limited

11/5/2017

IBE.MC

Acquisition

133,674

6.770

UBS Limited

11/5/2017

IBE.MC

Acquisition

9,322

6.771

UBS Limited

11/5/2017

IBE.MC

Acquisition

1,702

6.772

UBS Limited

11/5/2017

IBE.MC

Acquisition

92,362

6.773

UBS Limited

11/5/2017

IBE.MC

Acquisition

2,709

6.774

UBS Limited

11/5/2017

IBE.MC

Acquisition

81,900

6.775

UBS Limited

11/5/2017

IBE.MC

Acquisition

12,667

6.776

UBS Limited

11/5/2017

IBE.MC

Acquisition

57,537

6.777

UBS Limited

11/5/2017

IBE.MC

Acquisition

6,714

6.778

UBS Limited

11/5/2017

IBE.MC

Acquisition

12,635

6.779

UBS Limited

11/5/2017

IBE.MC

Acquisition

63,564

6.780

UBS Limited

11/5/2017

IBE.MC

Acquisition

3,151

6.781

UBS Limited

11/5/2017

IBE.MC

Acquisition

3,595

6.782

UBS Limited

11/5/2017

IBE.MC

Acquisition

2,740

6.784

UBS Limited

11/5/2017

IBE.MC

Acquisition

32,565

6.785

UBS Limited

11/5/2017

IBE.MC

Acquisition

1,182

6.788

UBS Limited

11/5/2017

IBE.MC

Acquisition

26,162

6.790

UBS Limited

11/5/2017

IBE.MC

Acquisition

2,413

6.791

UBS Limited

11/5/2017

IBE.MC

Acquisition

437

6.794

UBS Limited

11/5/2017

IBE.MC

Acquisition

20,000

6.795

UBS Limited

11/5/2017

IBE.MC

Acquisition

4,290

6.796

UBS Limited

11/5/2017

IBE.MC

Acquisition

2,743

6.797

UBS Limited

11/5/2017

IBE.MC

Acquisition

8,594

6.799

UBS Limited

11/5/2017

IBE.MC

Acquisition

13,872

6.800

UBS Limited

11/5/2017

IBE.MC

Acquisition

859

6.667

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

727

6.668

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

839

6.670

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

802

6.671

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

4,539

6.672

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

5,854

6.673

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

4,482

6.674

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

21,325

6.675

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

2,331

6.676

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

14,463

6.677

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

15,888

6.678

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

2,495

6.679

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

13,063

6.680

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

10,211

6.681

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

17,460

6.682

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

22,828

6.683

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

2,794

6.684

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

11,849

6.685

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

11,550

6.686

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

31,429

6.687

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

25,965

6.688

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

13,063

6.689

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

21,934

6.690

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

12,917

6.691

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

37,085

6.692

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

85,513

6.693

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

32,735

6.694

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

30,807

6.695

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

13,896

6.696

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

18,351

6.697

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

20,345

6.698

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

63,809

6.699

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

113,046

6.700

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

23,736

6.701

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

55,068

6.702

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

80,931

6.703

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

20,357

6.704

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

14,188

6.705

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

6,182

6.706

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

37,280

6.707

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

46,399

6.708

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

18,988

6.709

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

41,000

6.710

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

18,100

6.711

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

29,463

6.712

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

11,955

6.713

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

6,630

6.714

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

1,617

6.715

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

983

6.716

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

3,008

6.718

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

1,686

6.720

Morgan Stanley & Co. International plc

11/5/2017

IBE.MC

Acquisition

1,093

6.721

Morgan Stanley & Co. International plc

Iberdrola SA published this content on 22 May 2017 and is solely responsible for the information contained herein.
Distributed by Public, unedited and unaltered, on 22 May 2017 17:42:12 UTC.

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