Activities and functions of the main Group companies

The Group’s operational set-up as of 31 December 2012, by business area is outlined in chart No. 4. The activities carried out by the main operating companies9are described in summary form in the following diagram.

Chart No. 4 - OPERATIONAL SET-UP AS OF 31 DECEMBER 2012 (direct investee companies of Acea SpA)

Chart No. 4 - OPERATIONAL SET-UP AS OF 31 DECEMBER 2012 (direct investee companies of Acea SpA)

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Water

Acea Ato 2 SpA: this company manages the integrated water service in ATO 2 – Central Lazio (Rome and another 111 municipalities in the Lazio region). The SII – integrated water service – is involved in water collection, transportation and distribution activities, sewerage system management and waste water treatment. Acea Ato 2, besides looking after the plants and their enhancement, protects and monitors the drinking water supply sources, manages the monumental fountains, drinking fountains, fire hydrants and irrigation services.

Acea Ato 5 SpA: this company manages the integrated water service in the ATO 5 - Southern Lazio – Frosinone which includes 86 municipalities.

Ombrone SpA:holds shareholdings in Acquedotto del Fiora SpA, operator of the integrated water service in ATO 6 – Ombrone, in Tuscany, which serves 56 municipalities in the provinces of Grosseto and Siena.

Sarnese Vesuviano Srl:this company has shareholdings in Gori SpA, operator of the integrated water service in ATO 3 – Sarnese Vesuviano, in Campania, which serves 76 municipalities in the provinces of Naples and Salerno.

Acque Blu Arno Basso SpA: holds shareholdings in Acque SpA, operator of the integrated water service in ATO 2 – Basso Valdarno, in Tuscany, which serves 57 municipalities in the provinces of Pisa, Florence, Siena, Pistoia and Lucca.

Acque Blu Fiorentine SpA:holds shareholdings in Publiacqua SpA, operator of the integrated water service in ATO 3 – Medio Valdarno, in Tuscany, which serves 49 municipalities in the provinces of Florence, Prato, Pistoia and Arezzo.

Acque Blu Srl:55% owned by Acea SpA, it was established in December 2008 in accordance with the joint venture between Suez Environment and Acea SpA, for the purpose of gathering together the equity investments held by the two parties in various water management companies active in the Tuscan ATOs, within a single industrial entity.

Crea Group: it controls a number of water services management companies which operate in the ATOs of Lucca, Terni, Rieti and Benevento.

Intesa Aretina Scarl: 35% owned by Acea SpA as from 2009, it controls Nuove Acque SpA an integrated water service management company in ATO 4 – Alto Valdarno, which includes 37 municipalities in the provinces of Arezzo and Siena.

Umbra Acque SpA: it is the operator of the integrated water service in ATI 1 and 2 - Umbria, which serve 38 municipalities, including Perugia and Assisi.

9 The companies APICE SpA and Voghera Energia Vendita SpA were placed in liquidation during December 2012, therefore they are no longer included in the diagram.

LaboratoRI SpA: it carries out laboratory, research and development services, studies and consultancy, engineering services (planning and supervision of works) mainly in the water area, provided to Acea Group companies and the external market; it also offers technical and scientific support for the development of the Group on the national and international market.

Networks

Acea Distribuzione SpA: this company handles the services for the distribution and gauging of electricity, under high, medium and low voltage (HV, MV, LV), in the municipalities of Rome and Formello; it is devoted to the planning, design, construction and maintenance of high-voltage primary distribution plants and medium and low-voltage secondary distribution networks. Via a dedicated project Unit, it creates and runs the public and cemetery lighting systems in the municipality of Rome.

Acea Illuminazione Pubblica SpA: established in2010 is involved in the development of the public lighting systems and the management of the installations.

Acea Reti e Servizi Energetici SpA:since 2005 it has seen to the activities linked to the obligations to increase energy efficiency (Ministerial Decree dated 20 July 2004) on behalf of Acea Distribuzione; it ensures the supervision of technological innovation with regards to energy saving, develops the use of renewable sources in the production of energy and co-generation and tri-generation activities, and offers energy services in its capacity as an E.S.Co. (Energy Service Company).

Ecogena SpA:  established in 2007 by the joint venture between Astrim and Acea (which has a holding in the share capital of 51%), it designs and builds high efficiency co-generation/tri-generation energy plants (combined production of heat, electricity and cooling energy) for industrial and non-industrial buildings, availing itself of technologically advanced solutions. Since 2010, it holds 49% of EUR Power Srl, a company tasked with building and running co-generation/tri-generation plants and generating plants with heat pumps with geothermal integrations.

Energy

Acea Energia holding SpA:this company oversees the performance of the administration functions for the subsidiary companies - Acea Energia and Acea Produzione – seeing to the coherence with the operating policies of Acea SpA. Furthermore, it ensures the supply of electricity, gas and fuels for Acea Energy and Acea Produzione, monitors the reference markets and turns to account the energy production of the plants and the associated certificates (green certificates, CO2 issue rights, RECS-COFER).

Acea Energia SpA:this company is involved in the sale of electricity and gas for the eligible market and for the protected service. Acea Energia holds shareholdings in the share capital of Elgasud SpA and Umbria Energy SpA, companies involved in the marketing of energy, gas and related services with territorial interests in Puglia, Basilicata and Umbria.

Acea Produzione SpA: this company handles the electricity and heat production activities via its own group of plants, made up of 7 hydroelectric plants and 2 thermoelectric plants, mainly concentrated in Lazio.

Waste management

A.R.I.A. (Acea Risorse e Impianti per l’Ambiente): 100% owned by Acea SpA, it carries out activities for the production of electricity by means of the use of different types of waste and operates within the sphere of environmental services. It runs two waste-to-energy plants, situated in Terni and San Vittore del Lazio, a waste selection and composting plant and associated landfill in Orvieto and a WDF (Waste-Derived Fuel) production plant in Paliano (Frosinone).

Aquaser Srl: it is involved in the recovery and disposal of sludge which derives from the treatment of water. Aquaser controls the companies Kyklos Srl and Solemme SpA, both owners of composting plants. In March 2011, it acquired investment holdings in Innovazione Sostenibilità Ambientale Srl (ISA), which is involved in logistics and the transportation of sludge.

Corporate

Acea8cento: its purpose is to handle customer care activities, and in particular the remote contact channels, for the Acea Group companies