Scope of Consolidation at December 31, 2010

List of equity investments

(pursuant to Article 126 of Consob Resolution No. 11971 of May 14, 1999)

A) Investments in companies included in the scope of consolidation

A.1) Companies consolidated line by line

Company name Head office Currency Share capital Consolidated Group interest (a) Interest held in share capital Voting securities held Exercisable voting rights Type of investment relationship Notes




12.31.2010 12.31.2009 % (b) by % (c) % (d) (e)
Group Parent Company










Edison Spa Milan EUR 5,291,700,671







Electric Power Operations










Compagnia Energetica Bellunese CEB Spa (single shareholder) Milan (IT) EUR 1,200,000 86.12 86.12 100.00 Sistemi di Energia Spa - - S (i)
Dolomiti Edison Energy Srl Trento (IT) EUR 5,000,000 49.00 49.00 49.00 Edison Spa - - S -
Ecofuture Srl (single shareholder) Milan (IT) EUR 10.200 100.00 100.00 100.00 Edison Spa - - S (i)
Edison Energia Spa (single shareholder) Attività Energia Elettrica Milan (IT) EUR 22,000,000 100.00 100.00 100.00 Edison Spa - - S (i)
Edison Energie Speciali Calabria Spa (single shareholder) Milan (IT) EUR 120,000 100.00 - 100.00 Edison Spa - - S (i)
Edison Energie Speciali Sicilia Srl (single shareholder) Palermo (IT) EUR 20,000 100.00 100.00 100.00 Edison Energie Speciali Spa (single shareholder) - - S (i)
Edison Energie Speciali Spa (single shareholder) Milan (IT) EUR 4,200,000 100.00 100.00 100.00 Edison Spa - - S (i)
Edison Engineering Sa Athens (GR) EUR 260,001 100.00 100.00 100.00 Edison Spa - - S -
Edison Power Energy Srl (single shareholder) Ex Hydro Power Energy Srl - HPE Srl (single shareholder) Milan (IT) EUR 50,000 100.00 100.00 100.00 Edison Spa - - S (i)
Edison Trading Spa (single shareholder) Milan (IT) EUR 30,000,000 100.00 100.00 100.00 Edison Spa - - S (i)
Eneco Energia Spa (single shareholder) Bolzano (IT) EUR 222,000 100.00 100.00 100.00 Edison Spa - - S (i)
Gever Spa Milan (IT) EUR 10,500,000 51.00 51.00 51.00 Edison Spa - - S -
Hydros Srl - Hydros Gmbh Bolzano (IT) EUR 30,018,000 40.00 40.00 40.00 Edison Spa - - S -
Jesi Energia Spa Milan (IT) EUR 100,000 100.00 - 100.00 Edison Spa - - S (i)
Parco Eolico San Francesco Srl (single shareholder) Milan (IT) EUR 5,350,000 70.00 70.00 70.00 Edison Energie Speciali Spa (single shareholder) - - S (i)
Presenzano Energia Srl Milan (IT) EUR 120,000 90.00 100.00 90.00 Edison Spa - - S (i)
Sarmato Energia Spa Milan (IT) EUR 14,420,000 55.00 55.00 55.00 Edison Spa - - S -
Sistemi di Energia Spa Milan (IT) EUR 10,083,205 86.12 86.12 86.12 Edison Spa - - S (i)
Sondel Dakar Bv Breda (NL) EUR 18,200 100.00 100.00 100.00 Edison International Holding Nv - - S -
Termica Cologno Srl Milan (IT) EUR 9,296,220 65.00 65.00 65.00 Edison Spa - - S (i)
Termica Milazzo Srl Milan (IT) EUR 23,241,000 60.00 60.00 60.00 Edison Spa - - S (i)
Hydrocarbons Operations










Amg Gas Srl Palermo (IT) EUR 100,000 80.00 80.00 80.00 Edison Spa - - S (i)
Edison D.G. Spa (single shareholder) Selvazzano Dentro (PD) (IT) EUR 460,000 100.00 100.00 100.00 Edison Spa - - S (i)
Edison Energia Spa (single shareholder) - Attività Idrocarburi Milan (IT) EUR 22,000,000 100.00 100.00 100.00 Edison Spa - - S (i)
Edison Idrocarburi Sicilia Srl (single shareholder) Ragusa (IT) EUR 10,000 100.00 100.00 100.00 Edison Spa - - S (i)
Edison International Spa Milan (IT) EUR 75,000,000 100.00 100.00 92.86 Edison Spa - - S (i)






7.14 Selm Holding International Sa (in liquidation) - -

Edison Stoccaggio Spa (single shareholder) Milan (IT) EUR 81,497,301 100.00 100.00 100.00 Edison Spa - - S (i)
Euroil Exploration Ltd London (GB) GBP 9,250,000 100.00 100,00 0.00 Edison Spa - - S -






100.00 Selm Holding International Sa (in liquidation) - -

Corporate Activities and other operations










Atema Limited Dublino 2 (IRL) EUR 1,500,000 100,00 100,00 100,00 Edison Spa - - S -
Edison Hellas Sa Athens (GR) EUR 263,700 100,00 100,00 100,00 Edison Spa - - S -
Edison International Abu Qir Bv Amsterdam (NL) EUR 18,000 100,00 100,00 100,00 Edison International Holding Nv - - S -
Edison International Exploration & Production Bv Amsterdam (NL) EUR 18,000 100,00 100,00 100,00 Edison International Holding Nv - - S -
Edison International Finance Abu Qir Bv Amsterdam (NL) EUR 18,000 100,00 100,00 100,00 Edison International Holding Nv - - S -
Edison International Holding Nv Amsterdam (NL) EUR 50,000,000 100,00 100,00 100,00 Edison Spa - - S -
Montedison Srl (single shareholder) Milan (IT) EUR 2,583,000 100,00 100,00 100,00 Edison Spa - - S (i)
Nuova Alba Srl (single shareholder) Milan (IT) EUR 2,016,457 100,00 100,00 100,00 Edison Spa - - S (i)
Selm Holding International Sa (in liquidation) Luxembourg (LU) EUR 24,000,000 100,00 100,00 100,00 Edison Spa - - S -

A.2) Companies consolidated by the proportional method

Company name Head office Currency Share capital Consolidated Group interest (a) Interest held in share capital Voting securities held Exercisable voting rights Type of investment relationship Notes




12.31.2010 12.31.2009 % (b) by % (c) % (d) (e)
Electric Power Operations










Edipower Spa Milan (IT) EUR 1,441,300,000 50.00 50.00 50.00 Edison Spa - - JV -
Elpedison Power Sa Marousi Athens (GR) EUR 98,198,000 37.89 37.50 75.78 Elpedison Bv - - JV -
Elpedison Trading Sa Marousi Athens (GR) EUR 500,000 50.00 50.00 100.00 Elpedison Bv - - JV -
Ibiritermo Sa Ibirité - Estado de Minas Gerais (BR) BRL 7,651,814 50.00 50.00 50.00 Edison Spa - - JV -
Kinopraxia Thisvi N. Kiffissia (GR) EUR 20,000 65.00 65,00 65.00 Edison Engineering Sa - - JV (iii)
Parco Eolico Castelnuovo Srl Castelnuovo di Conza (SA) (IT) EUR 10,200 50.00 50.00 50.00 Edison Energie Speciali Spa (single shareholder) - - JV -
Sel Edison Spa Castelbello (BZ) (IT) EUR 84,798,000 42.00 42.00 42.00 Edison Spa - - JV -
Hydrocarbons Operations










Abu Qir Petroleum Company Alexandria (ET) EGP 20,000 50.00 50.00 50.00 Edison International Spa - - JV -
Ed-Ina D.o.o. Zagabria (HR) HRK 20,000 50.00 50.00 50.00 Edison International Spa - - JV -
IGI Poseidon Sa-Nat. Gas Subm. Interc. Gre-Ita-Poseidon Herakleio Attiki (GR) EUR 22,100,000 50.00 50.00 50.00 Edison International Holding Nv - - JV -
Corporate Activities and other operations










Elpedison Bv Amsterdam (NL) EUR 20,000 50.00 50.00 50.00 Edison International Holding Nv - - JV -

B) Investments in companies valued by the equity method

Company name Head office Currency Share capital Consolidated Group interest (a) Interest held in share capital Voting securities held Exercisable voting rights Carrying value (in millions of euros) (f) Type of investment relationship Notes




12.31.2009 % (b) by % (c) % (d)
(e)
Centrale Elettrica Winnebach Soc. Consortile Arl Terento (BZ) (IT) EUR 100,000
30.00 Hydros Srl - Hydros Gmbh - - - AC -
Centrale Prati Società Consortile Arl Val di Vizze (BZ) (IT) EUR 300,000
30.00 Hydros Srl - Hydros Gmbh - - - AC -
Consorzio Barchetta Jesi (AN) (IT) EUR 2,000
50.00 Jesi Energia Spa - - - AC -
E L.IT.E Spa Milan (IT) EUR 3,888,500
48.45 Edison Spa - - 2.8 AC -
Energia Senales Srl - Es Srl Senales (BZ) (IT) EUR 100,000
40.00 Hydros Srl - Hydros Gmbh - - - AC -
Eta 3 Spa Arezzo (IT) EUR 2,000,000
33.01 Edison Spa - - 1.2 AC -
GTI Dakar Ltd George Town Gran Caiman (KY) EUR 14,686,479
30.00 Sondel Dakar Bv - - - AC -
Iniziativa Universitaria 1991 Spa Varese (IT) EUR 16,120,000
32.26 Montedison Srl (single shareholder) - - 4.4 AC -
Kraftwerke Hinterrhein Ag Thusis (CH) CHF 100,000,000
20.00 Edison Spa - - 17.9 AC -
Soc. Svil. Rea. Gest. Gasdot. Alg-ITA V. Sardeg. Galsi Spa Milan (IT) EUR 37,242,300
20.81 Edison Spa - - 17.7 AC -
Utilità Spa Milan (IT) EUR 2,307,692
35.00 Edison Spa - - 1.5 AC -
Total investments in companies valued by the equity method







45.5

C) Investments in companies in liquidation or subject to permanent restrictions

Company name Head office Currency Share capital Consolidated Group interest (a) Interest held in share capital Voting securities held Exercisable voting rights Carrying value (in millions of euros) (f) Type of investment relationship Notes




12.31.2009 % (b) by % (c) % (d)
(e)
Auto Gas Company S.A.E. (in liquidation) Il Cairo (ET) EGP 1,700,000
30.00 Edison International Spa - - - AC -
Cempes Scrl (in liquidation) Rome (IT) EUR 15,492
33.33 Nuova C.I.S.A. Spa (In liq.) - (single shareholder) - - - AC -
Compagnia Elettrica Lombarda Spa (in liquidation) Milan (IT) EUR 408,000
60.00 Sistemi di Energia Spa - - - S -
Coniel Spa (in liquidation) Rome (IT) EUR 1,020
35.25 Edison Spa - - - AC -
Groupement Gambogi-Cisa (in liquidation) Dakar (SN) XAF 1,000,000
50.00 Nuova C.I.S.A. Spa (In liq.) (single shareholder) - - - AC -
Inica Soc. de Iniciativas Mineiras e Industriais Sa Lisbon (PT) PTE 1,000,000
20.00 Edison Spa - - - AC -
International Water Holdings Bv (in liquidation) Amsterdam (NL) EUR 40,000 50.00 50.00 Edison Spa - - - JV -
Nuova C.I.S.A. Spa (in liquidation) (single shareholder) Milan (IT) EUR 1,549,350
100.00 Edison Spa - - 2.4 S (i)
Nuova I.S.I. Impianti Selez. Inerti Srl (in bankruptcy) Vazia (RI) (IT) LIT in Euros 150,000,000 77,468.53
33.33 Montedison Srl (single shareholder) - - - AC -
Poggio Mondello Srl (single shareholder) Palermo (IT) EUR 364.000
100.00 Nuova C.I.S.A. Spa (In liq.) (single shareholder) - - - S (i)
Sistema Permanente di Servizi Spa (in bankruptcy) Rome (IT) EUR 154,950
12.60 Edison Spa - - - NG -
Soc. Gen. per Progr. Cons. e Part. Spa (in receivership) Roma (IT) LIT in Euros 300,000,000 154,937.07
59.33 Edison Spa - - - S -
Sorrentina Scarl (in liquidation) Rome (IT) EUR 46,480
25.00 Nuova C.I.S.A. Spa (In liq.) (single shareholder) - - - AC -
Total investments in companies in liquidation or subject to permanent restrictions







2.4

D) Investments in other companies valued at fair value

D.1) Investments held for trading

Company name Head office Currency Share capital Consolidated Group interest (a) Interest held in share capital Voting securities held Exercisable voting rights Carrying value (in millions of euros) Type of investment relationship Notes




12.31.2009 % (b) by % (c) % (d) (f) (e)
Acegas-Aps Spa Trieste (IT) EUR 283,690,763
1.30 Edison Spa - - 2.6 NG -
Acsm-Agam Spa Monza (IT) EUR 76,619,105
1.94 Edison Spa - - 1.6 NG -
Amsc-American Superconductor Devens (US) USD 507,017
0.32 Edison Spa - - 3.4 NG -

D.2) Available-for-sale investments

Company name Head office Currency Share capital Consolidated Group interest (a) Interest held in share capital Voting securities held Exercisable voting rights Carrying value (in millions of euros) Type of investment relationship Notes




12.31.2009 % (b) by % (c) % (d) (f) (e)
Emittenti Titoli Spa Milan (IT) EUR 4,264,000
3.89 Edison Spa - - 0.2 NG -
European Energy Exchange Ag – Eex Lipsia (DE) EUR 40,050,000
0.76 Edison Spa - - 0.7 NG -
Istituto Europeo di Oncologia Srl Milan (IT) EUR 80,579,007
4.28 Edison Spa - - 3.5 NG -
MB Venture Capital Fund I Participating Comp. E Nv Amsterdam (NL) EUR 50,000
7.00 Edison Spa - - 0.5 NG -
Prometeo Spa Osimo (AN) (IT) EUR 2,292,436
17.76 Edison Spa - - 0.5 NG -
Rashid Petroleum Company - Rashpetco Il Cairo (ET) EGP 20,000
10.00 Edison International Spa - - - NG -
RCS Mediagroup Spa Milan (IT) EUR 762,019,050
1.02 Edison Spa 1.06 1.06 8.0 NG -
Syremont Spa Messina (IT) EUR 1,250,000
24.00 Edison Spa - - - AC (ii)
Terminale GNL Adriatico Srl Milan (IT) EUR 200,000,000
10.00 Edison Spa - - 278.4 NG -
Sundry investments







1.2

Total investments in other companie s valued at fair value







300.6

Total equity investments







348.5

Companies added to the scope of consolidation in the year ended 12.31.2010

Company name Head office Currency Share capital at 12.31.2010 Consolidated Group interest at 12.31.2010
Acquired companies



Parco Eolico San Francesco Srl (single shareholder) Milan (IT) EUR 100,000 100.00
Companies previously valued by the equity method



Edison Energie Speciali Calabria Spa (single shareholder) Crotone (IT) EUR 120,000 100.00
Company name Head office Currency Share capital at 12.31.2009 Share capital at 12.31.2010 Consolidated Group interest at 12.31.2010
Companies removed from the scope of consolidation in the year ended 12.31.2010




Companies placed in liquidation




International Water Holdings Bv Amsterdam (NL) EUR 40,000 50.00 50.00
Liquidated companies




Ascot Srl Bressanone (BZ) (IT) EUR 10,330 50.00 50.00

Notes

(a) The consolidated Group interest is computed on the basis of the interest held in the respective share capital by the Parent Company or subsidiaries consolidated on a line-by-line basis, and by jointly controlled companies consolidated by the proportional method.

(b) The interest in the share capital is equivalent to the ratio between the aggregate par value of all equity securities held directly and the total share capital. In this computation, the denominator (total share capital) is net of any treasury shares held.

(c) The percentage of the voting securities held is equivalent to the ratio between the number of voting securities held directly (irrespective of the ownership of the voting rights) and the total number of voting securities (e.g. common and preferred shares) included in the share capital. The percentage is shown only if it is different from the overall interest held.

(d) The percentage of securities with exercisable voting rights is the ratio between the number of votes which can be effectively cast by the investor company attending an Ordinary Shareholders’ Meeting and the total number of votes that can be cast at an Ordinary Shareholders’ Meeting. The percentage is shown only if it is different from the overall interest held.

(e) S = subsidiary JV = joint venture AC = affiliated company NG = non-Group company

(f) The carrying value is shown only for companies valued by the equity method or at cost, owned directly by the Parent Company. For other companies consolidated on a line-by-line basis or by the proportional method, it is shown only if it is equal to or greater than one million euros.

(i) Company subject to the oversight and coordination of Edison Spa.

(ii) On 1/30/07 Edison exercised the option to sell its equity investment, with respect to which the counterparty is now in default.

(iii) This company is a contractual joint venture.


The currency codes used in this report are those of the ISO 4217 International Standard.

BRL Brazilian real

CHF Swiss franc

EGP Egyptian pound

EUR Euro

GBP British pound

HRK Croatian kuna

PTE Portuguese escudo

USD U.S. dollar

XAF Central African franc

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