Investor presentation

Investor presentation 2017-19 strategic plan June 2017

Investor presentation Agenda Enel today Page 2 2017-19 strategic plan - Key pillars Page 8 2017-19 strategic plan - Key financials Page 26 1Q 2017 consolidated results Page 34 FY 2016 consolidated results Page 40 2017-19 strategic plan - Annexes Page 46 1Q 2017 consolidated results - Annexes Page 62 FY 2016 consolidated results - Annexes Page 92 Appendix - Focus on global business lines and countries Page 110 Global Infrastructure & Networks Page 111 Global Renewable Energies Page 120 Global Thermal Generation Page 129 Global Trading and Upstream gas Page 135 Country Italy Page 139 Country Iberia Page 149 Region Latin America Page 154 1

Investor presentation Enel today

Investor presentation Enel today: global and diversified operator 1 40 bn Regulated Asset Base 62 mn distribution end users #1 in Italy, Spain, Chile, Peru #2 in Argentina, Colombia 38 GW renewable capacity 2 Global leadership in renewables 18.3 mn free retail customers #1 in Italy and Spain 47 GW thermal capacity Highly flexible and efficient generation fleet 1. As of 2016 2. Consolidated and managed capacity including 24.9 GW of large hydro 3. Presence with operating assets Countries of presence 3 3

Investor presentation Enel today: global and diversified operator 1 North & Central America Italy Iberia Europe 0.8 bn 5% 100% 6.6 bn 43% 29% 15% 54% -2% 18% 10% 3.6 bn 23% 22% 50% 49% 0.8 bn 5% 18% 30% 3% Latin America 2016 Group ordinary EBITDA 46% 39% 3.6 bn 24% 15% 1. As of 2016. Breakdown excludes -0.1 bn from holding and services 2. Presence with operating assets Networks Thermal generation Renewables Retail Countries of presence 2 47% 17% 15.2 bn 26% 10% 75% regulated / quasi-regulated 4

120 % 100 % 80% 60% 40% 20% 0% 120 % 100 % 80% 60% 40% 20% 0% Investor presentation EBITDA risk profile Retail Thermal Generation Renewables Networks 15.2 bn 15.2 bn 17 % 10 % 26 % 47 % 85% natural hedge of merchant generation 15% regulated 60% contracted under long term PPAs 40% merchant and sold forward with one year contracts 75% contracted under long term PPAs 25% merchant exposure 100% regulated 15 % 10 % 75 % Retail free market Merchant generation Regulated Quasi-regulated 2016 EBITDA 2016 EBITDA Integrated along the energy value chain with very limited EBITDA risk profile 5

Investor presentation Enel transformation: how are we changing 2013 2016 More efficient 12.6 bn Cash-cost 11.4 bn -10% Greener 6.4 GW Renewable capacity 1 11.0 GW +70% Investing for growth 2.4 bn Growth capex 5.9 bn 2 +145% Improved cash generation 20% FFO/Net Debt 26% +6 p.p. Higher profitability & return 19% 8.7% Net income/ebitda ROE 21% 9.0% +2 p.p. +0.3 p.p. Higher DPS 0.13 Dividend per share 0.18 +38% 1. Excludes large hydro 2. Includes 0.7 bn of capex related to deconsolidated renewables assets 6

Investor presentation A sustainable strategy United Nations Sustainable Development Goals (SDGs) Enel SDGs 2016 results 2020 targets 300,000 people 400,000 people 1.2 mn people 3 mn people, mainly in Africa, Asia and Latin America 1.1 mn people 1.5 mn people 1 ~395 gco2/kwheq < 350 gco2/kwheq 2 1. Target upgraded from the original 0.5 billion people commitment that was achieved in 2016 2. -25% base year 2007 7

Investor presentation 2017-19 strategic plan Key pillars

Digitalization Customer focus Investor presentation Industrial strategic pillars revisited Operational efficiency Industrial growth Group simplification Shareholder remuneration Active portfolio management 9

Investor presentation Delivery on industrial strategic pillars 1 Operational efficiency -8% of cash costs in nominal terms in 2016-7% additional savings by 2019 2 Industrial growth 0.8 bn 2016 growth EBITDA achieved 85% of 2017 growth EBITDA already addressed 3 Group simplification Simplification at holding level completed Second step at country level started 4 Active portfolio management 3 bn of total disposals in 2016 4.5 bn use of funds by 2019 5 Shareholder remuneration DPS CAGR 2016-19 ~+22% Floor at 0.21 /share for 2017 10

6,00 0.00 5,00 0.00 4,00 0.00 3,00 0.00 2,00 0.00 1,00 0.00-13,0 00.00 12,5 00.00 12,0 00.00 11,5 00.00 11,0 00.00 10,5 00.00 10,0 00.00 9,50 0.00 9,00 0.00 8,50 0.00 8,00 0.00 Investor presentation Operational efficiency 1 ( mn) Maintenance capex Opex Cash cost -16% -14% -15% 3,316 3.0 bn 2.8 bn 2,934 2,800 9,081 8.6 bn 8,494 8.3 bn 7,800 12,397 11.6 bn 11,428 11.1 bn 10,600 2015A 2016A 2019E 2015A 2016A 2019E 2015A 2016A 2019E Beating efficiency targets 1. In nominal terms. Adjusted figures net of one-offs - 2016 target - Previous plan target 11

20.0 18.0 16.0 14.0 12.0 10.0 8.0 6.0 4.0 2.0 - Investor presentation Operational efficiency: focus on opex Opex evolution 1 Opex by business 3-9% Networks /end user -16% 56.8 50.6 47.7 8.6 2016E 0.6 0.1 (0.5) CPI & Forex 2 (1.0) 0.5 bn from digitalization Growth Disposals Efficiency 7.8 2019E Renewables k /MW Thermal Generation 4 k /MW Retail 5 Cost to serve ( /customer) 2015A 2016A 2019E -26% 42.1 39.6 31.1 2015A 2016A 2019E -6% 38.7 35.5 36.3 2015A 2016A 2019E -18% 18.9 17.9 15.5 2015A 2016A 2019E Digitalization will accelerate opex reduction 1. Total fixed costs in nominal terms (net of capitalizations). Impact from acquisitions is not included. 2. Of which CPI +0.7 bn and forex -0.1 bn. 3. In nominal terms. Adjusted for delta perimeter 4. Excludes nuclear in Iberia 5. Revised target including direct overhead costs (vs. CMD 2016 target at 16.0 and 2019 target at 13.3) 12

25 20 15 10 5 0 14 12 10 8 6 4 2 0 14 12 10 8 6 4 2 0 Investor presentation Industrial growth: 2017-19 capex plan Total capex ( bn) Growth capex by business line ( bn) Growth capex by geography ( bn) 21.2 20.9 12.7 12.4 12.7 12.4 0.3 0.5 0.6 95% 0.8 95% 7.3-29% 5.2 12.7 12.4 1.5 1.5 1.1 0.5 1.2 0.5 4.5 4.8 8.5 8.5 4.6 +26% 5.8 1.5 2.3 2.9 2.8 2017-19 previous plan 2017-19 new plan 2017-19 previous plan 2017-19 new plan 2017-19 previous plan 2017-19 new plan Maintenance Growth Networks Thermal generation Renewables Retail Regulated quasi-regulated Italy Latam America 1 Iberia Europe Africa/Asia Rebalancing capex between networks and renewables 1. North & Central America 13

Investor presentation Industrial growth: focus on Global Infrastructure & Networks (1/2) Growth capex by area Growth capex by technology Key figures 38% 32% + 2 mn connected end users 5.8 bn 21% 5.8 bn 31% 37% 36% 5% Cumulative growth EBITDA 2.2 bn Italy Iberia Romania Latam Smart grid & E-mobility Connections & transmission Quality & efficiency Average time to EBITDA < 2 years Spread over WACC 300-400 bps Digitalization as key lever 14

Investor presentation Industrial growth: focus on Global Infrastructure & Networks (2/2) Italy Spain Romania Latam 2016 WACC real pre tax 5.6% 6.5% 1 7.7% 10% / 13.7% 2 Next regulatory cycle 2024 TOTEX mechanism from 2020 2020 2019 Argentina 2017 Approved Chile 2017 Approved Colombia 2017 Under review Brazil Rio 3 2018 Approved Brazil Caerà 4 2019 Peru 2018 RAB 2016 ( bn) ~20 ~11 ~1 ~8 Stable and visible regulatory framework in all the geographies 1. Nominal pre-tax 2. Colombia value as of 2016 under regulatory review 3. Ex Ampla 4. Ex Coelce 15

35 30 25 20 15 10 5 0 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 Investor presentation Industrial growth: renewables, Build, Sell and Operate model (BSO) Gross pipeline 1 by technology Coverage ratio Capacity additions (GW) 3% 1% 40% 56% Wind Solar Hydro Geo 19.5 GW Other 6.7 3.2 3.5 2017-19 capacity additions 2 3x 19.5 Gross pipeline 2.1 0.4 1.7 2016A Consolidated additions 2.6 1.7 0.9 2018E BSO Decreasing risk profile and pipeline monetization 1. Excludes large hydro 2. Includes BSO additions for 3.2 GW 16

3 2.5 2 1.5 1 0.5 0 Investor presentation Industrial growth: focus on capex in execution 2017-19 growth capex In execution by business By COD 1 Growth EBITDA by year ( bn) 1% 42% 4% 12.4 bn 6.5 bn 53% 46% 2% 3% 49% 2017 39% 2018 22% 2019 27% >2019 12% 0.8 1.4 1.9 0.8 1.3 2.6 1.9 In operation In execution Tenders awarded To be addressed Networks Thermal generation Renewables Retail 2016A 2017E 2018E 2019E COD 2017-19 EBITDA COD 2015-16 EBITDA EBITDA secured 60% of growth capex already addressed, retaining flexibility within vast pipeline of projects 1. Refers to capacity in Thermal generation and Renewables 17

Investor presentation Digitalization 2017-19 cumulative benefits 1 2017-19 cumulative digitalization capex Margins Opex EBITDA Asset 15% 3.9 bn 0.9 bn (0.2) bn 1.1 bn 83% 4.7 bn 2% Customer 0.7 bn 0.2 bn (0.2) bn 0.4 bn Asset Customers People People 0.1 bn - (0.1) bn 0.1 bn 1.1 bn (0.5) bn 1.6 bn Focus on assets, customers and people development 1. In real terms 18

70.0 68.0 66.0 64.0 62.0 60.0 58.0 600 550 500 450 400 350 300 250 200 150 80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0 0.0 380 330 280 230 180 130 80 30-20 Investor presentation Customer focus End-users and electricity distributed 1 Free customers and volumes Key drivers 426 447 262 293 Integrated energy management 62.2 62.6 63.2 64.0 213 18.3 19.5 5.5 5.3 12.8 14.2 230 32.2 34.0 5.5 5.6 26.7 28.4 Merchant risk mitigation Expiration of regulated market in Italy Further liberalization in Latam 2016A 2017E 2018E 2019E 2016A 2017E 2018E 2019E Electricity distributed (TWh) Energy sold 2 (TWh) Net production (TWh) End users (mn) Power customers (mn) Gas customers (mn) From long energy to long customers over the medium term 1. Excludes non organic growth related to CELG-D acquisition 2. Free market + PPAs 19

6.0 5.0 4.0 3.0 2.0 1.0 0.0 Investor presentation Customer focus EBITDA retail ( bn) Key drivers Key figures +20% Growth of retail customer base worldwide +16.5 mn power customers +0.4 mn gas customers 2.6 3.0 Higher focus on corporate customers in Latam +50% increase in volumes -11% reduction in unit margin 1.9 1 2.1 1 Digitalization in customer relationship Cost to serve -26% Decreasing churn rate to around 12% 2016A 2019E Increasing value per customers 15% take up rate of new services in 2019 on over 60 mn end-users Commodity business Additional services Customers as a new dimension to our strategy 1. Includes only Italy and Iberia 20

Future offering Current offering Investor presentation Customer focus: high potential for additional value creation Public lighting Design, installation and management of public lighting B2B, B2C, distributed generation storage + solar PV Traditional VAS Consolidation in offering heat pumps, boilers, LED e-home Platform Combined offer of gas, energy efficiency and renewables New services Full deployment of demand response services e-mobility: vehicle-to-grid and vehicle-to-home Recharging infrastructure - e-home e-mobility Mini utility (off-grid) New global business line to leverage on over 60 million end-users 21

470.00 450.00 430.00 410.00 390.00 370.00 350.00 40.0 0 35.0 0 30.0 0 25.0 0 20.0 0 15.0 0 10.0 0 5.00-350.00 300.00 250.00 200.00 150.00 100.00 50.0 0-55. 0 50. 0 45. 0 40. 0 35. 0 30. 0 25. 0 20. 0 15. 0 50.0 0 45.0 0 40.0 0 35.0 0 30.0 0 25.0 0 20.0 0 15.0 0 10.0 0 5.00 - Investor presentation Operational targets by business Networks Retail Renewables Thermal generation End users (mn) Smart meters (mn) 41.2 62.2 2016A 426 2016A 48.1 64.0 2019E Electricity distributed (TWh) 447 2019E 1. Includes only power and free gas customers 2. Free market + PPAs 3. Includes nuclear in Iberia Free customer base 1 (mn) 18.3 2016A Energy sold 2 (TWh) 213 2016A 34.0 2019E 293 2019E Managed capacity (GW) Consolidated capacity (GW) Large hydro (GW) 37.8 45.7 6.5 1.9 11.0 14.2 24.9 25.0 2016A Net production 23% 13% 10% 2016A 262 TWh 11% 28% 15% 2019E Installed capacity 3 (GW) 11% 46.8 2016A 30% 2019E 230 TWh 15% 26% 7% 11% 46% emission free 56% emission free 36.5 2019E Hydro Renewables Oil & Gas CCGT Coal Nuclear 22

Investor presentation Group simplification: Latin America restructuring New corporate structure 2016 key metrics 2 Key highlights Enel Americas 51.8% (1) Enel Chile 60.6% Enel Americas 2.4 $bn 0.6 $bn EBITDA Net income 3 Enel Chile 1.1 $bn 0.6 $bn Target to reduce the number of companies, from 66 to <30 470 $mn of total efficiency 2 by 2019 112 $mn Chile, 358 $mn Americas 99.1% 60.0% 1.5 $bn Net debt 0.9 $bn Positive regulatory revision in distribution in Argentina ARG BRA COL PER Enel Dx Chile Enel Gx Chile 11.5 $bn Market cap 4 5.2 $bn New regulation in distribution in Brazil Pending regulatory review in Colombia Reorganization process completed 1. Including treasury shares in Enel Americas 2. In local GAAP 3. Attributable net income 4. As of March 16, 2017 23

5.00 4.50 4.00 3.50 3.00 2.50 2.00 1.50 1.00 0.50 - Investor presentation Active portfolio management Disposals 1 completed in 2016 ( bn) Acquisitions completed in 2016 ( bn) 2017-19 active portfolio management program 3 Slovenske Elektrarne 1.3 Open Fiber 0.4 ~4.5 bn EGP North America 2 Hydro Dolomiti 1.2 0.3 Latam restructuring Latam minorities 0.2 0.1 ~3 bn Minority buy-out Share buy back 2 bn Romania put option 0.4 bn El Quintero & other 0.3 Other 0.2 Acquisition 2 bn CELG-D 1.2 bn Total 3.1 Total 0.9 Growth capex 0.5 bn Source of funds Use of funds Strong delivery on asset rotation with over 3 bn disposals 1. Impact on net debt 2. Includes 0.45 bn for debt deconsolidation of US JV, 0.75 bn for BSO disposals 3. As of March 2017 24

Investor presentation Shareholder remuneration Dividend policy Minimum DPS ( /sh) +17% +12% NEW 50% 55% 65% 70% 70% 60% 65% 65% 0.16 0.18 0.21 0.20 2015 2016 2017 2018 2019 2015A 2016A 2017E Confidence on strategy delivery allows improved shareholder return - Previous plan 25

Investor presentation 2017-19 strategic plan Key financials

0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 4.5 0 4.0 0 3.5 0 3.0 0 2.5 0 2.0 0 1.5 0 1.0 0 0.5 0-0.4 0.3 0.3 0.2 0.2 0.1 0.1 0.0-0.1-0.1 12% 11% 11% 10% 10% 9% 9% 8% 12% 11% 11% 10% 10% 9% 9% 8% 8% 7% Investor presentation Enel transformation and 2019 targets Profitability & cash generation Leverage Returns 50% >60% >60% 20% 26% 30% 10.4 % 10.5 % 12% 12% 19% 21% 27% 2.5x 2.5x 2.2x 8.7% 9.0% 2013A 2016A 2019E 2013A 2016A 2019E 2013A 2016A 2019E Net income/ebitda FFO/EBITDA Net debt/ebitda FFO/Net debt ROE ROACE Continuous improvement in cash generation and profitability 27

22.0 20.0 18.0 16.0 14.0 12.0 10.0 25. 0 23. 0 21. 0 19. 0 17. 0 15. 0 13. 0 11. 0 9.0 7.0 5.0 Investor presentation EBITDA evolution Ordinary EBITDA ( bn) 2016-19 ordinary EBITDA evolution ( bn) +15% 1.6 1.0 (0.4) 15.0 15.5 16.2 17.2 15.0 17.2 2016E1 2017E 2018E 2019E 2016E Growth Efficiency Active portfolio management 2019E Organic initiatives driving growth 1. 2016 EBITDA as per 2017-19 strategic plan assumption 28

Investor presentation EBITDA evolution 2016-19 EBITDA evolution by business line and country ( bn) 1.0 0.4 0.7 0.6 (0.5) 17.2 15.0 2016E1 Global Infrastructure & Networks Global Thermal Generation & Trading Global Renewable Energies Retail Active portfolio management & other 2019E 1.6 0.1 (0.4) 0.7 0.2 17.2 15.0 1 2016E Italy Iberia Latam Subsaharan Africa & Asia 1. 2016 EBITDA as per 2017-19 strategic plan assumption Active portfolio management 2019E 29

7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 Investor presentation Key financials: Group net income evolution Group net ordinary income ( bn) 2016-19 Group net ordinary income evolution ( bn) +47% 4.7 2.1 (0.1) 0.5 (0.6) 0.1 (0.5) 3.2 3.6 3.4 4.1 4.4 3.2 4.7 2016A 2017E 2018E 2019E 2016A EBITDA D&A Financial charges Taxes BSO model Minorities 2019E 21% Net income/ebitda 27% Accelerating net income accretion - Previous plan 30

4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5-5.0 % 4.5 % 4.0 % 3.5 % 3.0 % 2.5 % Investor presentation Financial plan and strategy Gross and net debt ( bn) Net financial expenses on debt ( bn) -6% -12% 51.4 ~49.5 ~49.5 ~48.5 8.3 5.5 ~6.5 ~5.0 ~6.5 ~5.0 ~6.0 ~5.0 5.0% 4.7% 2.5 2.4 2.3 2.2 37.6 ~38.0 ~38.0 ~37.5 2016A 2017E 2018E 2019E 2016A 2017E 2018E 2019E 2.5x 2.4x 2.3x Net debt/ebitda 2.2x Net financial expenses Cost of gross debt Net debt Financial receivables Cash 31

60. 0 50. 0 40. 0 30. 0 20. 0 10. 0 0.0-10.0 Investor presentation 2017-19 cumulated cash flow ( bn) ~49.0 ~(3.5) - ~(7.0) ~(7.0) ~(8.6) ~31.5 ~(11.9) ~22.9 ~(10.3) ~11.0 ~0.7 ~2.5 ~4.0 Ordinary EBITDA Provisions1 NWC & other Income taxes paid Financial expenses paid FFO Maintenance FFO after capex 2 maintenance capex Net growth capex 3 FCF Dividends paid Net FCF Cash-in from disposals4 Minority buyout & acquisitions Stronger organic cash flow generation versus the previous plan 1. Accruals, releases, utilizations of provisions in EBITDA (i.e. personnel related and risks and charges). Inclusive of bad debt provision accruals equal to 1.8 bn 2. Includes maintenance capex from acquisitions 3. Growth capex net of ~0.5 bn financed by disposals 4. Net of ~0.5 bn invested in growth capex 32

Investor presentation Group targets 2016A 2017E 2018E 2019E CAGR (%) 2016-19 Ordinary EBITDA ( bn) 15.2 15.5 16.2 17.2 ~+4% Net ordinary income ( bn) 3.2 3.6 4.1 4.7 ~+14% Minimum dividend per share ( ) 0.18 0.21 - - ~+22% Pay-out ratio 57% 65% 70% 70% +13 p.p. FFO/Net Debt 26% 26% 27% 30% ~+4 p.p. - Improved vs. previous plan 33

Investor presentation 1Q 2017 consolidated results

Investor presentation 1Q 2017 results: financial highlights ( mn) 1Q 2017 1Q 2016 yoy Adjusted Revenues 19,366 17,872 +8% Reported EBITDA 3,914 4.017-3% Ordinary EBITDA 1 3,763 3,871-3% Stable (4) Reported EBIT 2,525 2,670-5% Ordinary EBIT 2,374 2,524-6% Reported Group net income 983 939 +5% Group net ordinary income 943 795 +19% +23% (5) Capex 2 1,453 1,650-12% Net debt 39,282 37,553 (3) +4% FFO 1,740 1,567 +11% 1. Excludes extraordinary items for 146 mn in 1Q 2016 and for 151 mn in 2017 2. 1Q 2016 figure includes 103 mn capex related to asset held for sale 3. As of December 2016 4. Excludes +19 mn one-offs in 1Q 2016 and -73 mn in 1Q 2017 5. Excludes +16 mn one-offs in 1Q 2016 and -16 mn in 1Q 2017 35

400 0.0 350 0.0 300 0.0 250 0.0 200 0.0 Investor presentation 1Q 2017 results: ordinary EBITDA evolution ( mn) -3% -% (19) 84 86 (31) (136) 130 (149) (73) 3,871 3,852 3,836 3,763 +3% (Net of perimeter) 1Q 2016 ordinary One-offs 1Q 2016 adjusted Growth Efficiency Retail margin Scenario & Energy margin Forex 3 Perimeter 1Q 2017 adjusted 1 2 One-offs 1Q 2017 ordinary 1. Includes +19 mn capital gain on Compostilla RE 2. Includes -60 mn for personnel provisions for CELG, -33 mn for penalties revaluation in Argentina, +20 mn for islands settlement in Iberia 3. Relates mainly to Slovenske Elektrarne and North America JV deconsolidation 36

500 0.0 450 0.0 400 0.0 350 0.0 300 0.0 250 0.0 200 0.0 Investor presentation 1Q 2017 results: adjusted EBITDA by geography ( mn) Italy 1,801 mn -% Italy 1,959 mn Iberia 843 mn Latam 849 mn Europe & North Africa 238 mn North & Central America 180 mn 3,852 162 (169) 41 3 (5) 16 (45) 130 (149) 3,836 Iberia 674 mn Latam 1,029 mn Europe & North Africa 144 mn North & Central America 113 mn Sub-Saharan Africa & Asia -2 mn Sub-Saharan Africa & Asia 12 mn 1Q 2016 adjusted Italy Iberia Latam Europe & North Africa North & Central America Subsaha. Africa & Asia Other Forex Perimeter 1Q 2017 adjusted 37

900.00 800.00 700.00 600.00 500.00 400.00 300.00 200.00 100.00-25.0 0 20.0 0 15.0 0 10.0 0 5.00-30.0 0 25.0 0 20.0 0 15.0 0 10.0 0 5.00-25.0 0 24.0 0 23.0 0 22.0 0 21.0 0 20.0 0 19.0 0 18.0 0 17.0 0 16.0 0 Investor presentation 1Q 2017 results: Italian retail market Power unitary margin ( /MWh) -21% Ordinary EBITDA ( mn) Free market energy sold (TWh) 28 22 +14% +20% Free Regulated 560 641 461 541 99 100 1Q 2016 1Q 2017 B2C B2B Free power customers (mn) 15.1 12.6 3.3 +6% 3.5 9.3 +25% 11.6 1Q 2016 1Q 2017 6.5 7.3 1Q 2016 1Q 2017 Cost-to-serve ( /customer) -2% 20.3 19.9 FY 2016 LTM Volumes and efficiencies drive EBITDA improvement 38

Investor presentation 1Q 2017 results: forward sales 1 Italy 2017 Italy 2018 Regulated / quasi regulated Price driven Spread driven 59 TWh 30% 35% 35% Expected production 100% Hedged production Price 1 Spread 2 Achieved 43 /MWh vs. plan +4 /MWh Regulated / quasi regulated Price driven Spread driven Spain 2017 Spain 2018 61 TWh 2% 38% 60% Expected production 15% Hedged production Price 1 Spread 2 Achieved 44 /MWh vs. plan - Regulated / quasi regulated Price driven Spread driven 75 TWh 30% 40% 30% 100% Price 1 Spread 2 Achieved 55 /MWh vs. plan +3 /MWh Regulated / quasi regulated Price driven Spread driven 75 TWh 26% 44% 30% 25% Price 1 Spread 2 Achieved 54 /MWh vs. plan - Expected production Hedged production Expected production Hedged production 3 3 1. Average hedged price. Wholesale price for Italy, Retail price for Spain. 2. Average on clean spark spread and clean dark spread. 3. Includes only mainland production. 39

Investor presentation FY 2016 consolidated results

Investor presentation Financial highlights: FY 2016 results ( mn) FY 2016 FY 2015 yoy Like-for-like Revenues 70,592 75,658-7% Reported EBITDA 15,276 15,297 -% Ordinary EBITDA 1 15,174 15,040 +1% +3% (5) Reported EBIT 8,921 7,685 +16% Ordinary EBIT 2 9,435 9,215 +2% Reported Group net income 2,570 2,196 +17% Group net ordinary income 3,243 2,887 +12% +18% (6) Capex 3 8,842 7,762 +14% Net debt 4 37,553 37,545 -% FFO 1. Excludes extraordinary items for 102 mn in 2016 (+124 mn Hydro Dolomiti capital gain, +173 mn capital gain Quintero (Chile), -195 mn write down in Chile and Peru) and for 257 mn in 2015 (+141 mn SE Hydropower capital gain and +116 mn 3Sun) 2. Excludes impairments on D&A for 616 mn in 2016 and for 1,787 mn in 2015 3. Includes capex related to assets held for sale related to Slovenské Elektrárne for 283 mn and Upstream gas for 7 mn in FY 2016 and 649 mn in FY 2015 4. FY 2015: net of assets held for sale (841 mn mainly for Slovenské Elektrárne) 5. Excludes +264 mn one-offs in 2015 and -72 mn in 2016 6. Excludes +6 mn one-offs in 2015 and -168 mn in 2016 9,846 9,572 +3% 41

170 00.0 160 00.0 150 00.0 140 00.0 130 00.0 120 00.0 110 00.0 100 00.0 Investor presentation Ordinary EBITDA evolution: FY 2016 results ( mn) +1% +3% (264) 478 529 704 (725) (133) (383) (72) 15,040 14,776 15,246 15,174 +6% (Net of forex) FY 2015 ordinary One-offs FY 2015 adjusted Growth Efficiency Retail margin Scenario & Energy margin 3 Perimeter Forex FY 2016 adjusted 1 2 One-offs FY 2016 ordinary 1. Includes: +184 mn CO2 swap transaction in Iberia generation, +56 mn in distrubution in Argentina, -24 mn bad weather extra costs in distribution In Italy; +23 mn Ecotax Almaraz, +550 mn release of provision in Slovenske Electrarne, +450 mn in distribution in Italy, -884 mn personnel provisions and +91 mn other 2. Includes: Gas price review in Italy +311 mn, -439 mn in generation in Italy for Future-E and sale of CO2 allowances, +111 mn settlement on domestic coal in Iberia, -120 mn personnel provision in Iberia, +88 mn Catalonian nuclear tax in Iberia generation, -23 mn other 3. Relates to Slovenske Elektrarne deconsolidation 42

170 00.0 165 00.0 160 00.0 155 00.0 150 00.0 145 00.0 140 00.0 135 00.0 130 00.0 125 00.0 120 00.0 Investor presentation Adjusted EBITDA by geography: FY 2016 results ( mn) Italy 6,755 mn Iberia 3,494 mn +3% 713 17 256 8 12 (133) (383) Italy 6,688 mn Iberia 3,536 mn Latam 3,249 mn Europe & North Africa 909 mn North & Central America 575 mn 14,776 (61) 41 15,246 Latam 3,605 mn Europe & North Africa 776 mn North & Central America 833 mn Sub-Saharan Africa & Asia 7 mn Sub-Saharan Africa & Asia 14 mn FY 2015 adjusted Italy Iberia Latam Europe & North Africa North & Central America Subsaha. Africa & Asia Other Perimeter Forex FY 2016 adjusted 43

2.50 2.00 1.50 1.00 0.50-80.0 0 70.0 0 60.0 0 50.0 0 40.0 0 30.0 0 20.0 0 10.0 0-30.0 0 25.0 0 20.0 0 15.0 0 10.0 0 5.00-25.0 0 24.0 0 23.0 0 22.0 0 21.0 0 20.0 0 19.0 0 18.0 0 17.0 0 16.0 0 Investor presentation Italian retail market: FY 2016 results Power unitary margin ( /MWh) -% Adjusted EBITDA 1 ( bn) Free market energy sold (TWh) 27 27 +36% +24% Free Regulated 1.9 1.4 1.5 1.1 0.3 0.4 2015A 2016A B2C B2B Free power customers (mn) 41.6 51.6 +5% 12.4 11.9 29.7 +32% 39.2 2015A 2016A 6.4 7.1 2015A 2016A Cost-to-serve ( /customer) -7% 21.8 20.3 2015A 2016A Robust trend across the board 1. Excludes personnel provisions 44

15,5 00 13,5 00 11,5 00 9,50 0 7,50 0 5,50 0 3,50 0 1,50 0-500 -2,500 Investor presentation Cash flow ( mn): FY 2016 results 15,174 (1,512) 719 (1,959) (2,576) 9,846 (8,842) Maint. 2,934 Growth 5,909 750 1,754 (2,506) 1,494 742 Ordinary EBITDA Provisions 1 Working capital & other Income taxes Financial expenses 2 3 FFO Capex BSO disposals Free cash flow Dividends paid Active portfolio mgmt Net free cash flow FY 2015 ( bn) 15.0 (0.9) (0.4) (1.5) (2.6) 9.6 (7.8) - 1.8 (2.3) 1.3 0.8 Delta YoY +1% +62% n.m. +29% -1% +3% +14% n.a. -2% +9% +19% -2% FFO supporting more than record growth capex and efficiency program 1. Accruals, releases, utilizations of provisions in EBITDA (i.e. personnel related and risks and charges) 2. Includes dividends received from equity investments 3. Funds from operations 45

Investor presentation 2017-19 strategic plan Annexes

Investor presentation - strategic plan annexes Enel transformation: updated organizational structure Italy Global Infrastructure & Networks Global Renewable Energies Global Thermal Generation Global Trading & Upstream Gas Iberia Europe & North Africa Latin America North & Central America Customers Local stakeholders Regulation Revenues Cash flow EBITDA Best practices implementation Efficiencies in capex & opex Capital allocation EBITDA Sub-Saharan Africa & Asia 47

Investor presentation - strategic plan annexes Assumptions: Commodities, prices, macroeconomics and FX Scenario 2016 2017 2018 2019 New Plan Old Plan New Plan Old Plan New Plan Old Plan New Plan Old Plan Brent $/bbl 45 63 48 66 52 70 55 74 Coal $/ton 56 60 50 64 52 68 53 71 Gas TTF /MWh 13 21 14 21 15 22 16 22 CO2 /ton 5 9 7 11 9 13 10 16 Italy /MWh 39 50 41 52 43 53 45 54 Spain /MWh 34 49 43 52 46 55 50 58 Chile /MWh 57 79 60 44 37 44 30 36 Colombia /MWh 89 48 51 46 51 46 49 46 Italy GDP (%) 0.7 1.1 0.9 1.2 1.0 1.1 1.0 1.0 Italy electricity demand (% Change YoY) (1.5) 0.7 0.8 0.9 0.7 0.9 0.7 0.8 Spain GDP (%) 2.6 2.5 2.1 2.1 1.9 1.9 1.8 1.8 Spain electricity demand (% Change YoY) 0.8 1.8 1.2 1.7 1.2 1.5 1.2 1.5 Latam GDP 1 (%) (1.6) 1.2 1.1 2.3 2.1 3.3 2.5 3.4 Latam electricity demand 2 (% Change YoY) 3.2 2.9 3.2 3.6 3.4 4.0 3.6 3.9 EUR/USD 1.1 1.1 1.1 1.1 1.1 1.2 1.1 1.2 EUR/BRL 3.9 4.2 4.1 4.4 4.2 4.5 4.3 4.7 EUR/COP 3,360 3,375 3,268 3,456 3,535 3,575 3,678 3,582 EUR/CLP 747 740 734 759 718 787 704 809 1. Argentina, Brazil, Chile (CIS), Colombia, Peru.GDP weighted by real levels 2. Argentina, Brazil, Chile (CIS), Colombia, Peru. Average growth weighted by Enel s production 48

28.00 23.00 18.00 13.00 8.0 0 70.00 65.00 60.00 55.00 50.00 45.00 40.00 35.00 30.00 85.00 75.00 65.00 55.00 45.00 35.00 70.00 65.00 60.00 55.00 50.00 45.00 40.00 35.00 30.00 20.00 18.00 16.00 14.00 12.00 10.00 8.0 0 6.0 0 4.0 0 2.0 0 Investor presentation - strategic plan annexes Macro scenario: revised assumptions for commodities and prices Gas price - TTF ( /MWh) Coal price - API2 (USD/ton) CO 2 ( /ton) 21.3 21.5 21.6 64.4 68.3 71.4 11.0 13.0 16.0 14.2 15.0 16.3 50.0 51.5 53.0 7.1 8.7 9.6 2017 2018 2019 2017 2018 2019 2017 2018 2019 Italy power price ( /MWh) 52.0 53.0 54.0 Spain power price ( /MWh) 58.0 55.0 52.0 41.0 43.4 44.8 43.0 45.5 49.5 2017 2018 2019 2017 2018 2019 More conservative macro scenario assumptions Previous plan New plan 49

3 2.5 2 1.5 1 0.5 0 Investor presentation - strategic plan annexes Industrial growth: focus on growth EBITDA 2017-19 growth capex by business 2017-19 cumulated growth EBITDA Growth EBITDA by year ( bn) 42% 6% 5% 12.4 bn 47% 55% 45% 37% 27% 4 bn 3% 1% 15% 17% 0.8 1.4 1.9 0.8 1.3 2.6 1.9 Networks Thermal generation Renewables Retail Networks Thermal generation Renewables Retail 2016A 2017E 2018E 2019E COD 2015-16 EBITDA COD 2017-19 EBITDA EBITDA secured Increased contribution from networks and retail - Previous plan 50

35.00 30.00 25.00 20.00 15.00 10.00 5.0 0-18.00 16.00 14.00 12.00 10.00 8.0 0 6.0 0 4.0 0 2.0 0-20.00 18.00 16.00 14.00 12.00 10.00 8.0 0 6.0 0 4.0 0 2.0 0-8.0 0 7.0 0 6.0 0 5.0 0 4.0 0 3.0 0 2.0 0 1.0 0 - Investor presentation - strategic plan annexes Summary by business line Networks Retail Renewables Thermal generation EBITDA CAGR 1 +4.7% EBITDA CAGR 1 +7.2% EBITDA CAGR 1 +3.3% EBITDA CAGR 1 +2% 22.8 2017-19 EBITDA 10.6 2017-19 capex 8.6 2017-19 EBITDA 1.1 2017-19 capex 13.3 2017-19 EBITDA 6.2 2017-19 capex 4.1 2017-19 EBITDA Capex plan Capex plan Capex plan Capex plan 51% 2.6 2017-19 capex 20.9 bn 20.9 bn 20.9 bn 20.9 bn 5% 30% 10% 300-400 bps spread over WACC 100-150 bps spread over WACC 150 bps spread over WACC 250-300 bps spread over WACC 1. 2016-19 CAGR 51

Investor presentation - strategic plan annexes EBITDA targets by Country and Global Business Line ( bn) 2016 2017 2018 2019 Italy 6.6 6.8 7.1 7.5 Global Thermal Generation (0.1) (0.1) (0.1) 0.1 Global I&N 3.6 3.5 3.6 3.8 Global Renewable Energies 1.0 1.2 1.4 1.3 Retail 1.9 2.0 2.1 2.1 Service & Other 0.1 0.1 0.1 0.1 Iberia 3.6 3.4 3.6 3.8 Global Thermal Generation 0.8 0.8 0.7 0.8 Global I&N 1.8 1.9 2.0 2.0 Global Renewable Energies 0.4 0.3 0.3 0.4 Retail 0.7 0.5 0.6 0.6 Service & Other (0.1) (0.1) - (0.1) Latam 3.6 4.2 4.7 5.1 Global Thermal Generation 0.6 0.5 0.6 0.7 Global I&N 1.4 1.6 1.8 2.1 Global Renewable Energies 1.7 1.9 2.1 2.2 Retail - 0.2 0.2 0.3 Service & Other (0.1) - - (0.1) Europe & North Africa 0.8 0.4 0.3 0.3 North & Central America 0.8 0.6 0.5 0.4 Sub-Saharan Africa & Asia 0.0 0.1 0.1 0.1 Other (0.1) - - - Total 15.2 15.5 16.2 17.2 52

Investor presentation - strategic plan annexes EBITDA targets new vs old perimeter ( bn) EGP 1 2016 Large Hydro Global Renew able Energies EGP 1 Global Renewables Energies 2017 2018 2019 Large Hydro Global Renew able Energies EGP 1 Large Hydro Global Renew able Energies Italy 0.6 0.4 1.0 0.5 0.7 1.2 0.7 0.8 1.4 0.7 0.7 1.3 Iberia 0.2 0.2 0.4 0.2 0.1 0.3 0.2 0.2 0.3 0.2 0.2 0.4 Latam 0.3 1.4 1.7 0.4 1.5 1.9 0.6 1.5 2.1 0.6 1.6 2.2 Europe & North Africa 0.1-0.1 0.1-0.1 0.1-0.1 0.1-0.1 North & Central America 0.8-0.8 0.6-0.6 0.5-0.5 0.4-0.4 Sub-Saharan Africa & Asia 0.0-0.0 0.1-0.1 0.1-0.1 0.1-0.1 Other - - - - - - (0.0) - (0.0) (0.1) 0.1 - Total 2.0 2.0 4.0 1.9 2.3 4.2 2.0 2.4 4.5 2.1 2.5 4.6 EGP 1 Large Hydro Global Renew able Energies Global Thermal Generation Global Thermal Generation 2016 2017 2018 2019 Large Hydro Global Generation 2 Global Thermal Generation Large Hydro Global Generation 2 Global Thermal Generation Large Hydro Global Generation 2 Global Thermal Generation Italy (0.1) 0.4 0.3 (0.1) 0.7 0.6 (0.1) 0.8 0.7 0.1 0.7 0.8 Iberia 0.8 0.1 1.0 0.8 0.1 0.9 0.7 0.2 0.9 0.8 0.2 1.0 Latam 0.6 1.4 2.0 0.5 1.5 2.0 0.6 1.5 2.1 0.7 1.6 2.3 Europe & Noth Africa 0.4-0.4 0.1-0.1 - - - - - - North & Central America - - - - - - - - - - - - Sub-Saharan Africa & Asia - - - - - - - - - - - - Other (0.1) - (0.1) - - - - - - - 0.1 0.1 Total 1.6 2.0 3.6 1.3 2.3 3.6 1.2 2.4 3.6 1.6 2.5 4.1 Large Hydro Global Generation 2 53 1. Renewables old organizational structure 2. Global Generation old organizational structure

Investor presentation - strategic plan annexes Capex plan 2016-19 ( bn) 2016 2017 2018 2019 Growth Maintenance Growth Maintenance Growth Maintenance Growth Maintenance Italy 0.5 1.3 0.8 1.2 1.1 1.2 0.9 1.2 Global Thermal Generation 0.0 0.1 0.0 0.1 0.0 0.1 0.0 0.1 Global I&N 0.4 0.9 0.6 0.9 0.9 0.8 0.7 0.8 Global Renewable Energies 0.1 0.2 0.1 0.2 0.1 0.2 0.1 0.2 Retail 0.0 0.1 0.1 0.1 0.1 0.1 0.0 0.1 Service & Other 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Iberia 0.6 0.6 0.6 0.7 0.9 0.7 0.8 0.7 Global Thermal Generation 0.1 0.2 0.1 0.3 0.1 0.3 0.2 0.3 Global I&N 0.4 0.3 0.4 0.3 0.4 0.2 0.3 0.2 Global Renewable Energies 0.0 0.1-0.1 0.3 0.1 0.2 0.1 Retail 0.0 0.0 0.1 0.0 0.1 0.0 0.1 0.0 Latam 2.3 0.7 2.3 0.7 1.2 0.8 1.3 0.7 Global Thermal Generation 0.1 0.2 0.2 0.2 0.1 0.2 0.0 0.2 Global I&N 0.5 0.4 0.6 0.5 0.7 0.5 0.7 0.5 Global Renewable Energies 1.7 0.1 1.4 0.1 0.4 0.1 0.5 0.1 Retail - - 0.1-0.1-0.1 - Service & Other 0.0 0.0 - - - 0.0 - - Europe & North Africa 0.3 0.2 0.2 0.1 0.2 0.1 0.2 0.1 North & Central America 1.8 0.1 0.3 0.0 0.2 0.0 0.0 0.0 Sub-Saharan Africa & Asia 0.3 0.0 0.4 0.0 0.4 0.0 0.7 0.0 Other - - 0.0 0.0 0.0 0.1 0.0 0.1 Total 5.9 2.9 4.5 2.9 4.0 2.8 4.0 2.8 Total Capex 8.8 7.4 6.8 6.8 54

Digitalization Customer focus Investor presentation - ESG annexes ESG strategic pillars Engaging the local communities Engaging the people we work with Aiming at operating efficiency and innovation Decarbonizing the energy mix 55

Investor presentation - ESG annexes Engaging the local communities Related SDGs Industrial actions Related targets/commitments Access to affordable, sustainable and modern energy 3 mn people, mainly in Africa, Asia and Latin America by 2020 Employment and sustained, inclusive and sustainable economic growth 1.5 mn people by 2020 1 High-quality, inclusive and fair education 0.4 mn people by 2020 1. Target upgraded from the original 0.5 billion people commitment that was achieved in 2016 56

Investor presentation - ESG annexes Engaging the people we work with Related SDGs Industrial actions Related targets/commitments Appraise performance of all employees having worked for at least 3 months in the Group Survey corporate climate with a focus on safety Global implementation of the diversity and inclusion policy 2020: 100% of eligible employees involved 2020: 99% of TP 1 appraised 2020: 94% of TP 1 interviewed (feedback) 2020: 100% of eligible employees involved 2020: 84% of target population participating Recruiting should ensure equal gender splitting of the candidates accessing selection (c. 50% by 2020) Ongoing improvement of supply chain safety standards through checking on-site 120 planned Extra Checking on Site (ECoS) by 2020 Promote a safe travels culture 2020: 100% of countries of presence covered 1. TP stands for target population 57

Investor presentation - ESG annexes Aiming at operating efficiency and innovation Related SDGs Industrial actions Related targets/commitments Large scale infrastructure innovation: storage, electric vehicles, grid digitization and smart meters +18 mn smart meters rolled out by 2019 Open fiber: ultrabroadband deployment in Italy 250 Italian municipalities by 2019 9.5 mn homes Foster innovation through global partnerships and high potential startups Selection of 40 new innovative start-ups by 2020 1 Promote actions in line with UN Making cities resilient campaign 400 cities by 2020 1 1. Target introduced in the update of the plan. Does not include 2016 58

Investor presentation - ESG annexes Decarbonizing the energy mix Related SDGs Industrial actions Related targets/commitments Development of renewable capacity +~8 GW of additional renewable capacity by 2019 1 Reduction of thermal capacity -16 GW by 2019 Specific CO 2 emissions reduction < 350 gco2 /KWheq by 2020 (-25% base year 2007) Environmental retrofitting of selected plants ~500 mn of investment by 2020 1. Including managed capacity 59

Investor presentation - ESG annexes Mitigation of other environmental impacts Related SDGs Industrial actions Related targets/commitments Reduction of SO 2 specific emissions -30% by 2020 (vs 2010) Reduction of NO x specific emissions -30% by 2020 (vs 2010) Reduction of particulates specific emissions -70% by 2020 (vs 2010) Reduction of water specific consumption -30% by 2020 (vs 2010) Reduction of waste produced -20% by 2020 (vs 2015) 60

Investor presentation - ESG annexes Digitalization and related risks: cyber security framework Framework highlights Cyber security related targets/commitments Customer Asset People Single strategy approach based on business risk management 100% of internet web applications protected through advanced cybersecurity solutions Cyber security Platform Cloud Business lines involved in key processes: risk assessment, response and recovery criteria definition and prioritization of actions Setting up of Enel s CERT 1 Acknowledgement by CERTs 1 of current main countries of presence individual level Related SDGs Integrated information systems (IT), industrial systems (OT) and Internet of Things (IoT) assessment and management 15 cyber security knowledge sharing events on average by 2020 Cyber security by design to define and spread secure system development standards 1. Computer Emergency Response Team 61

Investor presentation 1Q 2017 consolidated results Annexes

3,5 00.0 3,0 00.0 2,5 00.0 2,0 00.0 1,5 00.0 1,0 00.0 500.0 0.0 20.0 18.0 16.0 14.0 12.0 10.0 8.0 6.0 4.0 2.0 - Investor presentation - 1Q 2017 results Operational efficiency: focus on opex Opex evolution 1 Opex by business 3 2,084 1Q 2016 +2% 128 25 (24) (86) 2,127 CPI & Forex 2 Growth Perimeter Efficiency 1Q 2017 Networks /end user Renewables k /MW Thermal Generation 4 k /MW Retail Cost to serve ( /customer) +1% 50.6 50.9 FY 2016 LTM -1% 39.6 39.3 FY 2016 LTM -% 35.5 35.6 FY 2016 LTM -2% 17.9 17.6 FY 2016 LTM Efficiency counterbalancing growth and forex 1. Adjusted figure: excludes +60 mn one-off in 1Q 2017 2. Includes +77 mn CPI effect and +50 mn forex effect 3. In nominal terms. Adjusted for delta perimeter 4. Excludes nuclear in Iberia 63

70.0 0 65.0 0 60.0 0 55.0 0 50.0 0 45.0 0 40.0 0 140.00 120.00 100.00 80.0 0 60.0 0 40.0 0 20.0 0-19.5 0 18.5 0 17.5 0 16.5 0 15.5 0 14.5 0 13.5 0 12.5 0 65.0 0 60.0 0 55.0 0 50.0 0 45.0 0 40.0 0 55 50 45 40 35 30 25 20 15 55.0 0 50.0 0 45.0 0 40.0 0 35.0 0 30.0 0 Investor presentation - 1Q 2017 results Industrial growth: operational targets by business Networks Retail Renewables Thermal generation End users (mn) Smart meters (mn) +3.9 Free customer base 1 (mn) +1.6 Managed capacity (GW) Consolidated capacity (GW) Large hydro (GW) Installed capacity 3 (GW) +0.7-3.5 61.9 39.2 65.8 41.8 17.1 18.7 37.5 38.2 0.2 2.2 10.8 11.1 26.4 24.9 50.2 46.7 1Q 2016 1Q 2017 1Q 2016 1Q 2017 1Q 2016 1Q 2017 1Q 2016 1Q 2017 Electricity distributed (TWh) Energy sold 2 (TWh) Net production 4 +3% 106 109 1Q 2016 1Q 2017 54 +7% 58 1Q 2016 1Q 2017 1. Includes only power and free gas customers 2. Free market + PPAs 3. Includes nuclear capacity 4. Includes production from renewable managed capacity 22% 16% 1Q 2016 66 TWh 26% 13% 11% 12% 22% 11% 13% 1Q 2017 65 TWh 28% 10% 16% 49% emission free 46% emission free Hydro Renewables Oil & Gas CCGT Coal Nuclear 64

200 0 180 0 160 0 140 0 120 0 100 0 800 600 400 200 0 140 0 120 0 100 0 800 600 400 200 0 Investor presentation - 1Q 2017 results Industrial growth: capex Total capex 1 ( mn) Growth capex by business line ( mn) -12% -13% 1,650 1,142-13% 1,453 997 6 1,142 997 125-82% 22 783-13% 684 6 508-10% 456 228 +25% 285 1Q 2016 1Q 2017 1Q 2016 1Q 2017 Maintenance Growth Networks Thermal generation Renewables Other Further acceleration in networks growth 1. 1Q 2016 figure includes 103 mn related to assets held for sale 65

18.0 16.0 14.0 12.0 10.0 8.0 6.0 4.0 8 7 6 5 4 3 2 1 0 Investor presentation Industrial growth: renewables, Build, Sell and Operate model (BSO) Consolidated capacity 1 (GW) BSO in 2016 2017-19 BSO capacity additions (GW) 10.6 2.0 (1.6) 11.0 Impact on net debt -450 mn JV deconsolidation -750 mn BSO disposals 130 mn capital gain 1.9 1.0 3.2 Average increase of 200 bps on project return 0.3 2015A Built capacity BSO 2016A Drop down 1Q 2017 Projects in execution Residual target 2017-19 additions Decreasing risk profile and pipeline monetization 1. Excludes 26.4 GW of Large Hydro in 2015 and 24.9 GW in 2016 66

120 0.0 100 0.0 800.0 600.0 400.0 200.0 0.0 Investor presentation - 1Q 2017 results Global Renewable Energies: ordinary EBITDA analysis ( mn) -10% 1,044 65 11 (183) 62 (67) 932 EGP 462 EGP 433 Large Hydro 582-4% (Net of perimeter) Large Hydro 499 1Q 2016 ordinary Growth Efficiency Scenario & resource Forex Perimeter 1Q 2017 ordinary 1. Includes personnel provisions 2. Includes capital gain on transmission line in Peru 67

220 0.0 210 0.0 200 0.0 190 0.0 180 0.0 170 0.0 160 0.0 150 0.0 140 0.0 130 0.0 120 0.0 Investor presentation - 1Q 2017 results Italy: ordinary EBITDA analysis by business ( mn) +8% Retail 560 mn Renewables 281 mn 1,801 (26) 106 81 (1) (2) 1,959 Retail 641 mn Renewables 280 mn Generation 50 mn Generation 156 mn Networks 889 mn Networks 863 mn 1Q 2016 ordinary Infrastructure & Networks Thermal Generation & Trading Retail Renewables Services & holding 1Q 2017 ordinary 68

Investor presentation - 1Q 2017 results From ordinary EBITDA to net ordinary income ( mn) 3,763 (1,389) (625) 2,374 1,749 (554) (252) 943 Ordinary EBITDA D&A EBIT Financial expenses & other 1 EBT Income taxes Minorities Group net ordinary income 1Q 2016 ( bn) 3.9 (1.3) 2.5 (0.8) 1.7 (0.5) Change YoY -3% +3% -6% -24% +2% +1% (0.4) -31% 0.8 +19% Double digit Group net income accretion 1. Includes other financial expenses (-202 mn in 1Q 2016, -65 mn in 1Q 2017) and results from equity investments (+35 mn in 1Q 2016, +39 mn in 1Q 2017) 69

4,00 0 3,00 0 2,00 0 1,00 0 - -1,000-2,000 Investor presentation - 1Q 2017 results Cash flow ( mn) (284) (1,049) 3,763 (35) (655) (1,453) 1,740 Growth 997 287 (1,289) (757) (1,759) Ordinary EBITDA Provisions 1 Working capital & other Income taxes Financial expenses 2 3 FFO Capex Free cash flow Dividends paid Active portfolio mgmt Net free cash flow 1Q 2016 ( bn) 3.9 (0.3) (1.2) (0.1) (0.8) 1.6 (1.6) (0.1) (0.2) 0.2 (0.2) Delta YoY -3% -2% -10% -59% -15% +12% -12% n.m. n.m. n.m. n.m. FFO growth mainly due to net working capital and net financial expenses improvement 1. Accruals, releases, utilizations of provisions in EBITDA (i.e. personnel related and risks and charges) 2. Includes dividends received from equity investments 3. Funds from operations 70

Investor presentation - 1Q 2017 results Net debt evolution ( mn) +1,727 Dec 31, 2016 continuing operations Free cash flow after dividends Active portfolio management Forex Mar 31, 2017 continuing operations 37,553 1,002 757 (30) 39,282 Net debt evolution affected by acquisitions and interim dividends 1. Net debt related to assets held for sale 71

Investor presentation - 1Q 2017 results Debt and financial expenses ( mn) Gross and net debt Net financial expenses on debt -2% -8% 51,388 50,455 8,326 5,647 5,509 5,526 37,553 39,282 651 598 FY 2016 1Q 2017 1Q 2016 1Q 2017 Net debt Financial receivables Cash Financial expenses reduction in line with guidance 72

Investor presentation - 1Q 2017 results From EBITDA to net income ( mn) 1Q 2017 1Q 2016 1Q 2017 1Q 2016 yoy reported reported ordinary ordinary yoy EBITDA 3,914 4,017-2.6% 3,763 3,871-2.8% D&A 1,389 1,347 1,389 1,347 EBIT 2,525 2,670-5.4% 2,374 2,524-5.9% Net financial charges (664) (852) (664) (852) Net income from equity investments using equity method 39 35 39 35 EBT 1,900 1,853 2.5% 1,749 1,707 2.5% Income tax (596) (548) (554) (546) Net income 1,304 1,305 1,195 1,161 Minorities 321 366 252 366 Group net income 983 939 4.7% 943 795 18.6% 1 73

Investor presentation - 1Q 2017 results Reported EBITDA matrix ( mn) Global Generation & Trading Global Infrastructures & Netw orks Renew able Energies 1Q 2017 1Q 2016 1Q 2017 1Q 2016 1Q 2017 1Q 2016 1Q 2017 1Q 2016 1Q 2017 1Q 2016 1Q 2017 1Q 2016 Italy 156 196 863 889 280 281 641 560 19 21 1,959 1,947 Iberia 92 124 446 478 51 124 89 133 16 (16) 694 843 Latam 278 108 374 318 454 445 - - (19) (22) 1,087 849 Argentina 15 22 43 30 8 6 - - - - 66 58 Brazil 33 15 100 97 64 44 - - (9) (7) 188 149 Chile 184 35 59 55 205 199 - - (2) (5) 446 284 Colombia 9 (5) 119 86 143 154 - - - - 271 235 Peru 37 41 53 50 32 40 - - - - 122 131 Uruguay - - - - 2 2 - - (8) (10) (6) (8) Europe & North Africa 90 143 25 45 48 40 (20) 9 1 1 144 238 Romania - (2) 25 45 37 26 (20) 10 1 1 43 80 Russia 90 37 - - - - - - - - 90 37 Slovakia - 108 - - - - - 1 - - - 109 Other 1 - - - - 11 14 - (2) - - 11 12 North & Central America 2 - - - - 113 180 - - - - 113 180 Sub-Saharan Africa & Asia 3 - - - - 12 (2) - - - - 12 (2) Other (1) (8) 1 3 (26) (24) - - (69) (9) (95) (38) Total 615 563 1,709 1,733 932 1,044 710 702 (52) (25) 3,914 4,017 Retail Services & Other Total Total 1. Includes Belgium, Greece, France, Bulgaria 2. Includes Mexico, USA, Panama, Canada, Guatemala, Costa Rica 3. Includes South Africa, India 74

Investor presentation - 1Q 2017 results Reported EBITDA matrix ( mn): new vs old perimeter Global Thermal Generation & Trading Global Renewable Energies Global Thermal Generation Global Generation 1. Includes Belgium, Greece, France, Bulgaria 2. Includes Mexico, USA, Panama, Canada, Guatemala, Costa Rica 3. Includes South Africa, India 1Q 2017 1Q 2016 1Q 2017 1Q 2016 Global Thermal Generation Global Generation Global Renew able Energies EGP Global Renew able Energies Italy 156 279 196 305 280 157 281 172 Iberia 92 99 124 199 51 44 124 49 Latin America 278 647 108 504 454 85 445 49 Argentina 15 23 22 28 8-6 - Brazil 33 66 15 42 64 31 44 17 Chile 184 335 35 203 205 54 199 31 Colombia 9 153 (5) 150 143 (1) 154 (1) Peru 37 70 41 81 32 (1) 40 - Uruguay - - - - 2 2 2 2 Europe & North Africa 90 90 143 143 48 48 40 40 Romania - - (2) (2) 37 37 26 26 Russia 90 90 37 37 - - - - Slovakia - - 108 108 - - - - Other 1 - - - - 11 11 14 14 North & Central America 2 - - - - 113 113 180 180 Sub-Saharan Africa & Asia 3 - - - - 12 12 (2) (2) Other (1) (1) (8) (6) (26) (26) (24) (26) Total 615 1,114 563 1,145 932 433 1,044 462 EGP 75

Investor presentation - 1Q 2017 results Ordinary 1 EBITDA matrix ( mn) Global Thermal Generation & Trading Global Infrastructures & Netw orks Global Renew able Energies 1Q 2017 1Q 2016 1Q 2017 1Q 2016 1Q 2017 1Q 2016 1Q 2017 1Q 2016 1Q 2017 1Q 2016 1Q 2017 1Q 2016 Italy 156 50 863 889 280 281 641 560 19 21 1,959 1,801 Iberia 92 124 446 478 51 124 89 133 16 (16) 694 843 Latam 127 108 374 318 454 445 - - (19) (22) 936 849 Argentina 15 22 43 30 8 6 - - - - 66 58 Brazil 33 15 100 97 64 44 - - (9) (7) 188 149 Chile 33 35 59 55 205 199 - - (2) (5) 295 284 Colombia 9 (5) 119 86 143 154 - - - - 271 235 Peru 37 41 53 50 32 40 - - - - 122 131 Uruguay - - - - 2 2 - - (8) (10) (6) (8) Europe & North Africa 90 143 25 45 48 40 (20) 9 1 1 144 238 Romania - (2) 25 45 37 26 (20) 10 1 1 43 80 Russia 90 37 - - - - - - - - 90 37 Slovakia - 108 - - - - - 1 - - - 109 Other 2 - - - - 11 14 - (2) - - 11 12 North & Central America 3 - - - - 113 180 - - - - 113 180 Sub-Saharan Africa & Asia 4 - - - - 12 (2) - - - - 12 (2) Other (1) (8) 1 3 (26) (24) - - (69) (9) (95) (38) Total 464 417 1,709 1,733 932 1,044 710 702 (52) (25) 3,763 3,871 Retail Services & Other Total Total 1. Excludes extraordinary items for +151 mn in 2017 of Electrogas Chile capital gain and for +146 mn in 2016 of Hydro Dolomiti capital gain 2. Includes Belgium, Greece, France, Bulgaria 3. Includes Mexico, USA, Panama, Canada, Guatemala, Costa Rica 4. Includes South Africa, India 76

Investor presentation - 1Q 2017 results Ordinary EBITDA matrix ( mn): new vs old perimeter Global Thermal Generation & Trading Global Renewable Energies Global Thermal Generation 1Q 2017 1Q 2016 1Q 2017 1Q 2016 Global Generation Global Thermal Generation Global Generation Global Renew able Energies EGP Global Renew able Energies Italy 156 279 50 159 280 157 281 172 Iberia 92 99 124 199 51 44 124 49 Latin America 127 496 108 504 454 85 445 49 Argentina 15 23 22 28 8-6 - Brazil 33 66 15 42 64 31 44 17 Chile 33 184 35 203 205 54 199 31 Colombia 9 153 (5) 150 143 (1) 154 (1) Peru 37 70 41 81 32 (1) 40 - Uruguay - - - - 2 2 2 2 Europe & North Africa 90 90 143 143 48 48 40 40 Romania - - (2) (2) 37 37 26 26 Russia 90 90 37 37 - - - - Slovakia - - 108 108 - - - - Other 1 - - - - 11 11 14 14 North & Central America 2 - - - - 113 113 180 180 Sub-Saharan Africa & Asia 3 - - - - 12 12 (2) (2) Other (1) (1) (8) (6) (26) (26) (24) (26) Total 464 963 417 999 932 433 1,044 462 EGP 1. Includes Belgium, Greece, France, Bulgaria 2. Includes Mexico, USA, Panama, Canada, Guatemala, Costa Rica 3. Includes South Africa, India 77

Investor presentation - 1Q 2017 results EBITDA from Reported to Adjusted: breakdown by geography ( mn) 1Q 2017 Italy Iberia Latam Europe & North Africa North & Central America Sub-Saharan Africa & Asia Reported 1,959 694 1,087 144 113 12 (95) 3,914 Extraordinary items - - (151) - - - - (151) Ordinary 1,959 694 936 144 113 12 (95) 3,763 One-offs - (20) 93 - - - - 73 Adjusted 1,959 674 1,029 144 113 12 (95) 3,836 Other Total 1Q 2016 Italy Iberia Latam Europe & North Africa North & Central America Sub-Saharan Africa & Asia Reported 1,947 843 849 238 180 (2) (38) 4,017 Extraordinary items (146) - - - - - - (146) Ordinary 1,801 843 849 238 180 (2) (38) 3,871 One-offs - - - - - - (19) (19) Adjusted 1,801 843 849 238 180 (2) (57) 3,852 Other Total 78

Investor presentation - 1Q 2017 results EBITDA from Reported to Adjusted: breakdown by business line ( mn) 1Q 2017 Global Thermal Generation & Trading Global Infrastructure & Networks Global Renewable Energies Retail Services & Holding Reported 615 1,709 932 710 (52) 3,914 Extraordinary items (151) - - - - (151) Ordinary 464 1,709 932 710 (52) 3,763 One-offs (20) 93 73 Adjusted 444 1,802 932 710 (52) 3,836 Total 1Q 2016 Global Thermal Generation & Trading Global Infrastructure & Networks Global Renewable Energies Retail Services & Holding Reported 563 1,733 1,044 702 (25) 4,017 Extraordinary items (146) - - - - (146) Ordinary 417 1,733 1,044 702 (25) 3,871 One-offs - - - - (19) (19) Adjusted 417 1,733 1,044 702 (44) 3,852 Total 79

2,30 0 1,80 0 1,30 0 800 300 (2 00) 2,30 0.00 1,80 0.00 1,30 0.00 800.00 300.00 (2 00.00 ) Investor presentation - 1Q 2017 results Operational efficiency: opex ( mn) +5% +2% 2,084 0 2,084 2,127 60 2,187 Personnel 1,097 1,097-4% 1,058 1,118 External costs 1,132 1,132 +8% 1,224 1,224 Capitalized costs (145) (145) 1Q 2016 Reported 1 One-offs 1Q 2016 Adjusted (155) (155) 1Q 2017 Adjusted 1 One-offs 1Q 2017 Reported 1. Includes delta provisions 80

Investor presentation - 1Q 2017 results Forward sales Latam Chile Colombia 100% 100% 85% 100% 90% 75% 2017 2018 2020 75 77 84 2017 2018 2020 59 61 74 Peru Brazil 100% 100% 100% 100% 100% 80% 2017 2018 2020 49 50 54 2017 2018 2020 52 58 68 Hedged production Unhedged production - Average price (USD/MWh) 81

Investor presentation - 1Q 2017 results Gross debt 1 structure Long term debt by currency After swap Interest rate composition Long term credit ratings 57% 83% 24% Standard & Poors Rating BBB Outlook Positive 48.4 bn 10% 4% 21% 4% 1% 3% 2% 4% 1% 4% 6% 48.4 bn 51.2 bn 76% Moody s Fitch Baa2 BBB+ Stable Stable EUR USD BRL CLP EUR USD BRL Floating Fixed + Hedged COP Other GBP CLP COP Other 1. In nominal terms 82

Investor presentation - 1Q 2017 results Debt structure by instrument ( bn) Debt by instrument Enel Spa EFI Central Others Italy Iberia Latin America North & Central America Europe & North Africa Sub-Saharan Africa & Asia Total Bonds 13.36 19.55 - - 0.06 4.04-0.17-37.18 Bank Loans 0.05 - - 4.59 1.03 2.13 0.43 0.25 0.24 8.72 Tax Partnership - - - - - - 0.57 - - 0.57 Other Loans - - - 0.10 0.52 0.30 0.05-0.20 1.17 Other short term debt 1.25 - - 0.10 0.21 0.06 - - - 1.62 Commercial Paper - - - - 1.20 - - - - 1.20 Gross debt 14.66 19.55-4.79 3.02 6.53 1.05 0.42 0.44 50.46 Financial Receivables -0.01 - -0.43-1.21-0.52-0.94-0.17 - - -3.28 Tariff Deficit - - - - -0.26 - - - - -0.26 Other short term financial receivables -0.95-0.14 - -0.34-0.04-0.04-0.47 - -0.01-1.99 Cash and cash equivalents -1.07 - -0.16-0.23-0.40-2.23-0.19-1.31-0.06-5.65 Net Debt Third Parties 12.63 19.41-0.59 3.01 1.80 3.32 0.22-0.89 0.37 39.28 Net Debt Intercompany 2.30-20.83 3.55 8.53 3.00 1.42 1.75 0.31-0.03 - Net Debt Group View 14.93-1.42 2.96 11.54 4.80 4.74 1.97-0.58 0.34 39.28 83

Investor presentation - 1Q 2017 results Debt maturity coverage split by typology ( bn) 19.7 25.2 5.1 Available committed credit lines 1 14.1 Cash 5.6 1Q 2017 Short Term 2 Bank Loans and Others Bonds 20.1 6.9 6.9 5.5 2.8 1.3 1.2 3.5 0.9 2.5 5.6 1.1 3.2 4.3 0.9 2.4 1.6 2017 2018 2019 2020 2021 After 2021 1. Of which 13.8 bn of long term committed credit lines with maturities beyond March 2018 2. Includes commercial paper 84

Investor presentation - 1Q 2017 results Group total net installed capacity: breakdown by technology and geography MW Hydro 1 Wind Geothermal Solar & Other Nuke Coal CCGT Oil&Gas ST/OCGT Italy 12,415 718 761 97-6,478 4,535 2,739 27,742 Iberia 4,764 1,618-14 3,318 5,168 5,445 2,417 22,744 Latam 9,600 1,092-504 - 835 4,240 2,652 18,922 Argentina 1,328 - - - - - 1,922 1,169 4,419 Brazil 890 400-12 - - 319-1,621 Chile 3,548 642-492 - 611 1,532 609 7,434 Colombia 3,056 - - - - 224-187 3,467 Peru 778 - - - - - 467 686 1,932 Uruguay - 50 - - - - - - 50 Europa & North Africa 19 741-106 - 3,623 809 4,447 9,744 Romania - 498-36 - - - - 534 Russia - - - - - 3,623 809 4,447 8,878 Slovakia - - - - - - - - - Other 2 19 242-71 - - - - 332 North/Central Americas 631 2,018-173 - - - - 2,822 Mexico 53 675-0 - - - - 728 Panama 300 - - 54 - - - - 354 USA 34 1,267-119 - - - - 1,420 Other 3 245 76 - - - - - - 321 Africa Subsahariana & Asia 4-371 - 323 - - - - 695 Total 27,429 6,558 761 1,218 3,318 16,103 15,028 12,254 82,670 TOTAL 1. Includes 24,890 MW of Large Hydro (10,895 MW in Italy, 4,721 MW in Iberia, 9,273 MW in Latam) 2. Includes Belgium, Greece, France, Bulgaria 3. Includes Canada, Guatemala, Costa Rica 4. Includes South Africa, India 85

Investor presentation - 1Q 2017 results Group total net production: breakdown by technology and geography GWh Hydro 1 Wind Geothermal Solar & Other Nuke Coal CCGT Oil&Gas ST/OCGT Italy 3,367 352 1,451 30-6,826 1,967 224 14,218 Iberia 1,512 960-5 7,184 5,723 1,992 1,603 18,980 Latam 8,581 658-289 - 899 5,050 1,104 16,581 Argentina 580 - - - - - 2,856 719 4,155 Brazil 831 245-4 - - 580-1,660 Chile 2,187 377-285 - 835 1,220 192 5,096 Colombia 3,694 - - - - 64-22 3,780 Peru 1,289 - - - - - 394 170 1,853 Uruguay - 36 - - - - - - 36 Europa & North Africa 14 536-27 - 4,760 1,606 3,747 10,689 Romania - 402-8 - - - - 410 Russia - - - - - 4,760 1,606 3,747 10,113 Slovakia - - - - - - - - - Other 2 14 134-19 - - - - 166 North/Central Americas 661 1,849-15 - - - - 2,525 Mexico 46 558-0 - - - - 604 Panama 440 - - 11 - - - - 450 USA 21 1,229-5 - - - - 1,255 Other 3 154 62 - - - - - - 216 Africa Subsahariana & Asia 4-143 - 158 - - - - 301 Total 14,135 4,498 1,451 523 7,184 18,209 10,616 6,677 63,293 TOTAL 1. Includes 11,774 GWh of Large Hydro (2,256 GWh in Italy, 1,483 GWh in Iberia, 8,035 GWh in Latam) 2. Includes Belgium, Greece, Bulgaria 3. Includes Canada, Guatemala, Costa Rica 4. Includes South Africa, India 86

Investor presentation - 1Q 2017 results Group total additional capacity: breakdown by technology and geography MW Hydro 1 Wind Geothermal Solar & Other Nuke Coal CCGT Oil&Gas ST/OCGT Italy - - - 1 - - - - 1 Iberia - - - - - - - - - Latam - - - - - - - - - Argentina - - - - - - - - - Brazil - - - - - - - - - Chile - - - - - - - - - Colombia - - - - - - - - - Perù - - - - - - - - - Uruguay - - - - - - - - - Europa & North Africa - - - - - - - - - Romania - - - - - - - - - Russia - - - - - - - - - Slovakia - - - - - - - - - Other 2 - - - - - - - - - North/Central Americas - - - 29 - - - - 29 Mexico - - - - - - - - - Panama - - - 29 - - - - 29 USA - - - - - - - - - Other 3 - - - - - - - - - Africa Subsahariana & Asia 4-36 - - - - - - 36 Total - 36-30 - - - - 66 TOTAL 1. Of which 0 MW of Large Hydro 2. Includes Belgium, Greece and Bulgaria 3. Includes Canada, Guatemala, Costa Rica 4. Includes South Africa, India 87

Investor presentation - 1Q 2017 results Renewable projects in execution: breakdown by technology and geography 1,2 MW Wind Hydro Geothermal Solar Biomass Total Italy - 24 4-0 29 Iberia - 6 - - - 6 Latam 568 174 41 987-1,770 Europe & North Africa 154 - - - - 154 North & Central America 1,095 - - 1,024-2,119 Sub-Saharan Africa & Asia 705 - - 34-739 Total 2,522 204 45 2,045 0 4,816 1. Includes BSO projects 2. As of March 31 st, 2017 88

Investor presentation - 1Q 2017 results Renewable projects under construction : breakdown by technology and geography 1,2 MW Wind Hydro Geothermal Solar Biomass Total Italy 4 0 4 Iberia - Latam 568 170 41 987 1,766 Europe & North Africa - North & Central America 796 1,024 1,820 Sub-Saharan Africa & Asia - Total 1,364 174 41 2,011 0 3,590 1. Includes BSO projects 2. As of March 31 st, 2017 89

Investor presentation - 1Q 2017 results Renewable projects ready to build : breakdown by technology and geography 1,2 MW Wind Hydro Geothermal Solar Biomass Total Italy - 20 4 - - 25 Iberia 6 6 Latam 4 4 Europe & North Africa 154 154 North & Central America 299 299 Sub-Saharan Africa & Asia 705 34 739 Total 1,158 30 4 34-1,226 1. Includes BSO projects 2. As of March 31 st, 2017 90

Investor presentation - 1Q 2017 results Global Renewable Energies gross pipeline 1 Pipeline by technology Pipeline by geography Pipeline by COD 1% 11% 3% 1% 2% 55% 31% 64% 3% 17.8 GW 17.8 GW 17.8 GW 38% 42% 33% 16% Wind Solar Hydro Geo Other Italy Iberia Latam Europe & North Africa North & Central America Sub-Saharan Africa & Asia 2017 2018 >2018 1. As of March 31 st, 2017 91

Investor presentation FY 2016 consolidated results Annexes

440.00 430.00 420.00 410.00 400.00 390.00 380.00 370.00 360.00 350.00 19.5 0 18.5 0 17.5 0 16.5 0 15.5 0 14.5 0 13.5 0 12.5 0 230.00 220.00 210.00 200.00 190.00 180.00 170.00 160.00 150.00 140.00 55. 0 50. 0 45. 0 40. 0 35. 0 30. 0 25. 0 20. 0 15. 0 55.0 0 50.0 0 45.0 0 40.0 0 35.0 0 30.0 0 Investor presentation - FY 2016 results annexes Industrial growth: operational targets by business Networks Retail Renewables Thermal generation End users (mn) Smart meters (mn) +0.7 Free customer base 1 (mn) +1.6 Managed capacity (GW) Consolidated capacity (GW) Large hydro (GW) Installed capacity 3 (GW) +0.6-5.9 61.5 62.2 38.5 41.2 16.7 18.3 37.2 37.8 0.2 1.9 10.6 11.0 26.4 24.9 52.7 46.8 2015A 2016A 2015A 2016A 2015A 2016A 2015A 2016A Electricity distributed (TWh) Energy sold 2 (TWh) Net production 4 427 426 2015A -% 2016A 193 2015A +10% 213 2016A 14% 30% 23% 2015A 284 TWh 15% 8% 10% 23% 13% 10% 2016A 262 TWh 11% 28% 15% 45% emission free 46% emission free Hydro Renewables Oil & Gas CCGT Coal Nuclear 1. Includes only power and free gas customers 2. Free market + PPAs 3. Includes nuclear capacity 4. Consolidated production 93

10, 000.0 9,5 00.0 9,0 00.0 8,5 00.0 8,0 00.0 7,5 00.0 7,0 00.0 20.0 18.0 16.0 14.0 12.0 10.0 8.0 6.0 4.0 2.0 - Investor presentation - FY 2016 results annexes Operational efficiency: focus on opex Opex evolution 1 Opex by business 3-6% Networks /end user -11% 56.8 50.6 9,081 (10) 30 (78) (529) Renewables k /MW 2015A 2016A -6% 42.1 39.6 2015A CPI & Forex 2 Growth Disposals Efficiency 8,494 2016A Thermal Generation 4 k /MW Retail Cost to serve ( /customer) 2015A 2016A -8% 38.7 35.5 2015A 2016A -5% 18.9 17.9 2015A 2016A Savings across all global business lines 1. Adjusted figure: excludes +491 mn one-off in 2015 and +261 mn in 2016 2. Includes +295 mn CPI effect and -305 mn forex effect 3. In nominal terms. Adjusted for delta perimeter 4. Excludes nuclear in Iberia 94

100 00 900 0 800 0 700 0 600 0 500 0 400 0 300 0 200 0 100 0 0 700 0 600 0 500 0 400 0 300 0 200 0 100 0 0 Investor presentation - FY 2016 results annexes Industrial growth: capex Total capex ( mn) Growth capex by business line ( mn) +14% +33% 7,762 4,433 +33% 8,842 5,909 46 4,433 752 2,698-38% +47% 5,909 466 3,961 70 3,329-12% 2,933 937 +51% 1,412 2015A 2016A 2015A 2016A Maintenance Growth Networks Thermal generation Renewables Other Significant acceleration on growth 95

120.00 100.00 80.0 0 60.0 0 40.0 0 20.0 0-3.00 2.50 2.00 1.50 1.00 0.50 - CELG-D Equatorial 2 CPFL Energisa 3 AES Eletropaulo Investor presentation - FY 2016 results annexes CELG-D acquisition Key figures Opex/customer (USD/customer) SAIDI (hours of interruption) 1 Valuation multiple (EV/RAB) 3 million customers 13 TWh electricity consumption 0.8 USD bn RAB 84 113 CELG-D Regulatory reference 42 Coelce 45 43.2 30 15 12.3 0 2000 2005 2010 2015 1.6x 2.4x 2.2x 1.8x 1.5x CELG-D COLCE Coelce Second largest distribution company in Brazil with 10 mn customers Significant turn-around opportunity 1. SAIDI - System Average Interruption Duration Index - Hours of Interruption per year/customer 2. Adjusted to consider power distribution segment only 3. Includes pension fund liabilities and Eletrobras dispute liability according to AES estimates 96

500 0.0 450 0.0 400 0.0 350 0.0 300 0.0 250 0.0 200 0.0 150 0.0 100 0.0 500.0 0.0 Investor presentation - FY 2016 results annexes Global Renewable Energies: ordinary EBITDA analysis ( mn) -% -1% 365 80 (457) 3,995 92 25 (113) 22 4,009 EGP 1,705 4,020 3,987 EGP 2,015 Large Hydro 2,290 Large Hydro 1,994 FY 2015 ordinary One-offs FY 2015 adjusted Growth Efficiency Scenario & resource Active portfolio management Forex FY 2016 adjusted One-offs FY 2016 ordinary 1. Includes personnel provisions 2. Includes capital gain on transmission line in Peru 97

750 0.0 700 0.0 650 0.0 600 0.0 550 0.0 500 0.0 Investor presentation - FY 2016 results annexes Italy: ordinary EBITDA analysis by business ( mn) -2% -1% Retal 1,336 mn Renewables 1,315 mn 6,659 96 6,755 (98) (186) 508 (275) (16) 6,688 (133) 6,555 Retail 1,932 mn Renewables 1,040 mn Generation 43 mn Generation -142 mn Networks 3,933 mn Networks 3,620 mn FY 2015 ordinary 1 One-offs FY 2015 adjusted Infrastructure & Networks Thermal Generation & Trading Retail Renewables Services & holding FY 2016 adjusted 2 One-offs FY 2016 ordinary 1. Includes -24 mn bad weather extra costs in distribution, +450 mn in distribution in Italy, -564 mn personnel provisions and +42 mn other 2. Includes gas price review +311 mn, -439 mn in generation, -72 mn personnel provision utilization, -67 mn other 98

Investor presentation - FY 2016 results annexes From ordinary EBITDA to net ordinary income ( mn) (5,739) 15,174 9,435 (2,702) 6,733 (2,135) (1,355) 3,243 Ordinary EBITDA D&A EBIT Financial expenses & other 1 EBT Income taxes Minorities Group net ordinary income FY 2015 ( bn) 15.0 (5.8) 9.2 (2.4) 6.8 (2.3) Change YoY +1% -1% +2% +13% -1% -6% (1.6) -18% 2.9 +12% Double digit net income accretion 1. Includes other financial expenses (-243 mn in 2016, +158 mn in 2015) and results from equity investments (+65 mn in 2016, +52 mn in 2015) 99

Investor presentation - FY 2016 results annexes Net debt evolution ( mn) -833 Dec 31, 2015 continuing operations Free cash flow after dividends Active portfolio management Forex Dec 31, 2016 continuing operations 37,545 37,553 841 1 752 (1,494) (91) Net debt unchanged vs. previous year 1. Net debt related to assets held for sale 100

Investor presentation - FY 2016 results annexes Debt and financial expenses ( mn) Gross and net debt Net financial expenses on debt -3% -3% 52,760 51,388 10,640 8,326 4,575 5,509 37,545 37,553 2,613 2,524 FY 2015 FY 2016 FY 2015 FY 2016 Net debt Financial receivables Cash Financial expenses reduction in line with guidance 101

Investor presentation - FY 2016 results annexes From EBITDA to net income ( mn) FY 2016 FY 2015 FY 2016 FY 2015 yoy reported reported ordinary ordinary yoy EBITDA 15,276 15,297-0.1% 15,174 15,040 0.9% D&A 6,355 7,612 5,739 5,825 EBIT 8,921 7,685 16.1% 9,435 9,215 2.4% Net financial charges (2,987) (2,456) (2,767) (2,456) Net income from equity investments using equity method (154) 52 65 52 EBT 5,780 5,281 9.5% 6,733 6,811-1.1% Income tax (1,993) (1,909) (2,135) (2,280) Net income 3,787 3,372 4,598 4,531 Minorities 1,217 1,176 1,355 1,644 Group net income 2,570 2,196 17.0% 3,243 2,887 12.3% 1 102

Investor presentation - FY 2016 results annexes Ordinary 1 EBITDA matrix ( mn) Global Thermal Generation & Trading Global Infrastructures & Netw orks Global Renew able Energies FY 2016 FY 2015 FY 2016 FY 2015 FY 2016 FY 2015 FY 2016 FY 2015 FY 2016 FY 2015 FY 2016 FY 2015 Italy (142) 43 3,620 3,933 1,040 1,315 1,932 1,336 105 32 6,555 6,659 Iberia 812 780 1,815 1,643 351 419 677 557 (93) (46) 3,562 3,353 Latam 575 341 1,429 1,400 1,692 1,640 - - (118) (75) 3,578 3,306 Argentina 98 76 155 165 23 38 - - - - 276 279 Brazil 73 56 433 372 199 137 - - (36) (29) 669 536 Chile 227 53 252 266 799 762 - - (25) 1 1,253 1,082 Colombia 51 17 398 406 531 547 - - - - 980 970 Peru 126 139 191 191 132 154 - - - - 449 484 Other 2 - - - - 8 2 - - (57) (47) (49) (45) Europe & North Africa 373 1,040 225 260 138 136 25 12 1 3 762 1,451 Romania (1) (1) 225 260 84 83 30 19 1 3 339 364 Russia 186 164 - - - - - - - - 186 164 Slovakia 191 871 - - - - - - - - 191 871 Other 3 (3) 6 - - 54 53 (5) (7) - - 46 52 North & Central America 4 - - - - 833 575 - - - - 833 575 Sub-Saharan Africa & Asia 5 - - - - 14 7 - - - - 14 7 Other (54) (42) (13) 6 (59) (97) - - (4) (178) (130) (311) Total 1,564 2,162 7,076 7,242 4,009 3,995 2,634 1,905 (109) (264) 15,174 15,040 1. Excludes extraordinary items for 102 mn in 2016 (+124 mn Hydro Dolomiti capital gain, +173 mn capital gain Quintero (Chile), -195 mn write down in Chile and Peru) and for 257 mn in 2015 (+141 mn SE Hydropower capital gain and +116 mn 3Sun) 2. Includes Uruguay and other 3. Includes Belgium, Greece, France, Bulgaria 4. Includes Mexico, USA, Panama, Canada, Guatemala, Costa Rica 5. Includes South Africa, India Retail Services & Other Total Total 103

Investor presentation - FY 2016 results annexes Ordinary EBITDA matrix ( mn): new vs old perimeter Global Thermal Generation & Trading Global Renewable Energies Global Thermal Generation FY 2016 FY 2015 FY 2016 FY 2015 Global Generation Global Thermal Generation Global Generation Global Renew able Energies EGP Global Renew able Energies Italy (142) 305 43 655 1,040 593 1,315 703 Iberia 812 950 780 958 351 213 419 241 Latin America 575 1,984 341 1,841 1,692 283 1,640 140 Argentina 98 121 76 115 23-38 (1) Brazil 73 186 56 148 199 86 137 45 Chile 227 834 53 718 799 192 762 97 Colombia 51 584 17 567 531 (2) 547 (3) Peru 126 260 139 293 132 (2) 154 - Other 1 - - - - 8 8 2 2 Europe & North Africa 373 373 1,040 1,040 138 138 136 136 Romania (1) (1) (1) (1) 84 84 83 83 Russia 186 186 164 164 - - - - Slovakia 191 191 871 871 - - - - Other 2 (3) (3) 6 6 54 54 53 53 North & Central America 3 - - - - 833 833 575 575 Sub-Saharan Africa & Asia 4 - - - - 14 14 7 7 Other (54) (54) (42) (42) (59) (59) (97) (97) Total 1,564 3,558 2,162 4,452 4,009 2,015 3,995 1,705 EGP 1. Includes Uruguay and other 2. Includes Belgium, Greece, France, Bulgaria 3. Includes Mexico, USA, Panama, Canada, Guatemala, Costa Rica 4. Includes South Africa, India 104

9,40 0 7,40 0 5,40 0 3,40 0 1,40 0 (6 00) 9,40 0.00 7,40 0.00 5,40 0.00 3,40 0.00 1,40 0.00 (6 00.00 ) Investor presentation - FY 2016 results annexes Operational efficiency: opex ( mn) -9% -6% 9,572 (491) 9,081 8,494 261 8,755 Personnel 3,665 4,603-5% 4,372 4,393 External costs 6,541 5,112-7% 4,752 4,992 Capitalized costs (634) (634) 1 FY 2015 One-offs FY 2015 Reported Adjusted (630) (630) FY 2016 1 One-offs FY 2016 Adjusted Reported 1. Includes delta provisions 105

Investor presentation - FY 2016 results annexes Group total net production: breakdown by technology and geography GWh Hydro 1 Wind Geothermal Solar & Other Nuke Coal CCGT Oil&Gas ST/OCGT Italy 16,052 1,298 5,832 122-28,145 8,913 551 60,913 Iberia 7,288 3,422-167 25,921 21,336 7,425 6,764 72,323 Latam 32,619 2,451-827 - 3,653 18,029 4,586 62,165 Argentina 2,256 - - - - - 8,559 2,309 13,124 Brazil 2,787 1,099-16 - - 1,572-5,474 Chile 9,375 1,162-811 - 3,061 4,985 333 19,727 Colombia 14,031 - - - - 592-329 14,952 Peru 4,170 - - - - - 2,914 1,615 8,698 Uruguay - 189 - - - - - - 189 Europa & North Africa 1,235 1,715-147 7,523 19,209 5,936 17,848 53,613 Romania - 1,192-43 - - - - 1,236 Russia - - - - - 18,254 4,959 17,848 41,062 Slovakia 1,201 - - 5 7,523 954 - - 9,684 Other 2 34 522-99 - - 977-1,632 North/Central Americas 2,837 9,007 362 62 - - - - 12,268 Mexico 214 1,567-0 - - - - 1,781 Panama 1,347 - - 20 - - - - 1,367 USA 784 7,120 362 42 - - - - 8,308 Other 3 491 320 - - - - - - 811 Africa Subsahariana & Asia 4-401 - 129 - - - - 530 Total 60,031 18,294 6,194 1,455 33,444 72,343 40,303 29,749 261,812 TOTAL 1. Includes 49,921 GWh of Large Hydro (10,791 GWh in Italy, 7,173 GWh in Iberia, 30,755 GWh in Latam, 1,201 GWh in Europe & North Africa) 2. Includes Belgium, Greece, Bulgaria 3. Includes Canada, Guatemala, Costa Rica 4. Includes South Africa, India 106

Investor presentation: FY 2016 results annexes Regulatory update: focus on Argentina, Brazil and Colombia Previous regulation Proposed framework Approved 2017-19 EBITDA 1 impact Argentina Temporary tariff based on historical opex and capex from February 2016 Expected RAB 2017 ~2 bn WACC 12.5% Recognized Opex at 2016 level Depreciation: 2.7% yearly RAB 2.3 bn +0.40 bn Potential upside vs. Strategic Plan Brazil (Ampla) 3rd cycle until 2019 (WACC 11.4%) Bad debt recognition updated every 5 yrs Recognized losses: based on Aneel model 4th cycle from 2018 (WACC 12.3%) Recognition of bad debt updated yearly Recognized losses: new target from 2017 Agreement reached +0.14 bn Current regulation Colombia RAB calculation: price cap model RAB updated every 5 years Opex connected to quality indicators WACC: 13.7% RAB calculation: revenue cap model updated with investments New opex as a % of new assets and historical recognized opex WACC: Pending to be defined Revision ongoing -0.05 bn +0.5 bn 1. Cumulative 2017-19 EBITDA impact as per 2017-19 strategic plan 107

Investor presentation - FY 2016 results annexes Argentina regulatory update New regulatory framework VAD (Valor Agregado de Distribución) Enel s commitments Price cap model Recognition of USD 914 mn 0.9 USD bn capex over 2017-19 WACC 12.46% real pre-tax Determined in real terms and adjusted by inflation, efficiency and investments Improving quality level RAB recognition of USD 2.5bn 1 Gradual tariff increase in 3 different steps Reduction in energy losses 10% regulatory target by 2019 Upside in EBITDA versus strategic plan assumptions 1. Internal source 108

Investor presentation - FY 2016 results annexes Open Fiber Open Fiber business plan: A&B areas Infratel auctions: C&D areas Padova Milano 2 Venezia Torino 2 Bologna 2 Genova Firenze Perugia Merger with Metroweb effective since April 2016 3.9 bn total capex Open Fiber awarded all available lots in the first tender 1.4 bn public funds Cagliari Napoli Bari 270 municipalities 1 9.6 mn homes 3,000 municipalities 4.6 mn homes - Works already started 1 st Infratel auction area Palermo Catania EBITDA of 300 mn in 2021 75% EBITDA margin 2 nd auction bids already submitted Accelerating Open Fiber business plan 1. Includes Milan s interland 109

Investor presentation Appendix Focus on global business lines and countries

Investor presentation Global Infrastructure and Networks

Investor presentation Positioning and key figures Brazil (8%) 1 Argentina (18%) 1 19 TWh distributed energy 2.5 mn end-users 23 TWh distributed energy 6.8 mn end-users Chile (33%) 1 16 TWh distributed energy 1.8 mn end-users Colombia (22%) 1 15 TWh distributed energy 3.2 mn end-users Italy (85%) 1 224 TWh distributed energy 31.5 mn end-users Iberia (42%) 1 Peru (31%) 1 8 TWh distributed energy 1.4 mn end-users 1. 2015 market share in terms of number of end-users Romania (34%) 1 106 TWh distributed energy 12 mn end-users 15 TWh distributed energy 2.8 mn end-users Key figures 2016A Distributed energy (TWh) 426 End users (mn) 62.2 Financials ( bn) 2016 EBITDA 7.1 Opex 3.2 Maintenance capex 1.6 Growth capex 1.4 Total capex 3.0 112

Investor presentation Regulatory scenario: Europe 2017 WACC real pre-tax Italy Iberia Romania 5.6% 6.5% 1 7.7% Next regulatory cycle Italy Iberia Romania 2024 2020 2019 Regulatory frameworks already set 40% of Group EBITDA safe and stable RAB ~ 32 bn stable over the plan Long term stability 1. Nominal pre-tax 113

Investor presentation Regulatory scenario: Latam Argentina 12.5% Chile 10% 2017 WACC real pre-tax Brazil Ampla 11.4% Colombia 13.7% 1 Brazil Coelce 12.3% Peru 12% Argentina 2017 Chile 2017 Next regulatory cycle Brazil Ampla 2018 Colombia 2017 Brazil Coelce 2019 Peru 2018 Argentina/Brazil (Ampla) approved Colombia under review Improved scenarios vs old plan RAB equal to 8 bn growing at over 20% up to 2019 Strong improvement expected in the future regulatory framework 1. Value as of 2016; under regulatory review 114

Investor presentation Infrastructure digitalization Italy Iberia Latam Romania Degree of digitalization Technologies(AS-IS) Smart meter Italy Iberia Latam 100% 75% Pilots Romania 5% 0.4 1.1 0.2 Basic Automated primary substations Customers/Remote control 100% 260 100% 960 95% 1.400 95% 370 1.7 0.1 Intermediate Work force management SIM M2M 1 100% 650k 30% 200k 40% 60k 10% 65k 0.3 Advanced 2.0 bn 0.5 bn 1.1 bn 0.2 bn Total capex 2017-19 ~3.8 bn % of delivery in the plan Significant investment in digitalization in the long term 1. SIM M2M: SIM used to facilitate the communication between devices (M2M: Machine to Machine) 115

140.3 120.3 100.3 80.3 60.3 40.3 20.3 0.3 Investor presentation The industrial rational of network digitalization RES Integration: Power requested to HV operator Italy GW 30 GW distributed generation 30 20 10 0 00:00 04:00 08:00 12:00 16:00 20:00 24:00 29 15 650 k connections to prosumers -48% Quality of service Improvement: Best case Italy 128 80 Smart metering Network automatization Work force Management SAIDI 1-66% /end users -40% Process optimization 48 44 Tech convergence 2001 2005 2010 2015 Year 2010 Year 2016 SAIDI 1 /end users Digitalization enables sustained performance improvement 1. SAIDI: minutes per year 116

8.0 0 7.0 0 6.0 0 5.0 0 4.0 0 3.0 0 2.0 0 1.0 0-120 100 80 60 40 20 0 120 100 80 60 40 20 0 Investor presentation Efficiency Cash cost evolution ( bn) Cash cost/end users nominal ( ) Cash cost/end users real ( ) -1% -4% -12% 4.7 0.4 (0.5) 4.7 1.7 1.6 76.1 72.9 76.1 67.2 3.1 3.1 2016E CPI & Forex Efficiency 2019E 2016E 2019E Maintenance Opex Europe 73.5-7% 68.4 Europe 2016E 2019E 73.5-10% 66.3 Latam 83.5 +1% 84.5 Latam 83.5-17% 68.9 117

10 9 8 7 6 5 4 3 2 1 0 10 9 8 7 6 5 4 3 2 1 0 Investor presentation Efficiency quality of services Minutes of interruption % Losses Europe % Losses Latam 100.0% -4% -15% 95% 85% 84% 67% 62% 2016E 2016 FCT 2017E 2017 2018E 2018 2019 2019E 2016E 2019E 2016E 2019E Italy / Iberia Brasil (Coelce) Romania / Peru Chile / Colombia Argentina / Brasil (Ampla) Italy/Spain 118

9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 Investor presentation Financial targets EBITDA and total capex ( bn) Italy, Iberia: distribution tariff reduction, partially offset by growth projects and cost reduction +13% 2017 0.3 bn Latam: regulation improvement in Argentina (RTI) and Ampla Crash program in Brazil Romania: distribution tariff reduction Italy: digitalization and new smart meter projects 7.1 7.3 7.5 8.0 2018 0.3 bn Iberia: opex efficiency and growth projects (smart meter) Latam: opex efficiency programs in Argentina (Edesur 2020), Chile and Colombia, extraordinary tariff revision Ampla Romania: distribution tariff reduction 3.0 3.5 3.8 3.6 2019 0.5 bn Italy: digitalization and new smart meter projects Iberia: growth projects (remote control) Latam: organic growth and efficiency programs 2016A 2017E 2018E 2019E Romania: new regulatory cycle EBITDA Capex 119

Investor presentation Global Renewable Energies

Investor presentation Positioning and key figures Key figures 2016A Old perimeter Large hydro Capacity 1 (GW) 35.9 11.0 24.9 Production (GWh) 86.0 36.1 49.9 Key financials ( bn) 2016 Old perimeter Large hydro EBITDA 4.0 2.0 2.0 Opex 1.4 0.8 0.6 Maintenance capex 0.3 0.2 0.1 Countries of presence Countries of interest Growth capex 1 4.0 3.8 0.2 Net installed capacity 1 (GW) 6.5 1.1 2.5 0.8 0.1 24.9 1. Consolidated capacity 2. Growth capex includes capex related to BSO model (Build Sell and Operate) Geo Hydro Wind Solar Biomass Large hydro 121

1.2 1.1 1.0 0.9 0.8 0.7 0.6 60.0 55.0 50.0 45.0 40.0 35.0 30.0 25.0 20.0 1.2 1.0 0.8 0.6 0.4 0.2 0.0 65 60 55 50 45 40 35 30 25 20 Investor presentation Equipment value maximization Wind turbine cost by delivery date & LCOE 1 evolution Solar equipment cost 2 by delivery date & LCOE 1 evolution 1.03 1.01 46 0.93-10% 48 43 41 1 39 37 1 0.71-30% 35-24% 34-29% 2014 2015 2016 2017 2018 2019 2014 2015 2016 2017 2018 2019 Wind LCOE ($/MWh) Average wind turbine cost ($m/mw) Solar LCOE ($/MWh) Average solar equipment cost ($m/mw) Effective procurement strategy leveraging on Enel volumes and auctions success 1. Normalised LCOE based on 2014 levels 2. Includes PV module, inverter, tracker, BOP, related service costs 122

120.0% 110.0% 100.0% 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 120.0% 110.0% 100.0% 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% Investor presentation Engineering and technological leadership Wind LCOE 1 evolution Solar LCOE 1 evolution 100% 15% 10% 75% 100% 14% 1 15% 1 71% 2014 LCOE Market improvement Enel improvement 2019 LCOE 2014 LCOE Market improvement Enel improvement 2019 LCOE Best in class in reducing costs and increasing our competitive advantage 1. Normalised LCOE based on 2014 levels 123

80.0 75.0 70.0 65.0 60.0 55.0 50.0 45.0 40.0 35.0 30.0 0.0 9 0.0 7 0.0 5 0.0 3 0.0 1-0.01-0.03-0.05 80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0 0.0 9 0.0 7 0.0 5 0.0 3 0.0 1-0.01-0.03-0.05 100.0 90.0 80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0 0.0 0.0 9 0.0 7 0.0 5 0.0 3 0.0 1-0.01-0.03-0.05 180.0 160.0 140.0 120.0 100.0 80.0 60.0 0.0 8 0.0 6 0.0 4 0.0 2 0-0.02-0.04-0.06 Investor presentation Operational efficiency: key performance indicators 1 Hydro cash cost (k /MW) Wind cash cost (k /MW) Solar cash cost (k /MW) Geothermal cash cost (k /MW) 5.0% 5.0% 4.0% 55.9 1.9% 1.8% 2.2% 2.0% -25% -22% 37.1 44.0 42.0 29.1 28.9 3.3% 51.7 2.1% 1.0% 20.4 19.0-63% 121.8 1.8% 1.8% -11% 111.0 108.0 Historical 2016E 2019E Historical 2016E 2019E Historical 2016E 2019E Historical 2016E 2019E Lost production factor Digitalization and innovative solutions to achieve performance improvement and efficiency 1. O&M Cash Costs/MW at forex 2016 excluding taxes, insurance, contribution and not-recurring, Historical values refer to 2009-11 years, except solar which refer to 2013-14 124

Investor presentation Asset value maximization: in execution capacity returns Brazil South Africa Mexico Peru USA Technology Wind / PV Wind Solar PV Wind / PV / Hydro Wind Capacity (MW) 1,300 800 1,000 326 1,000 Production (GWh) 3,800 3,000 2,250 1,200 4,100 Capex (USD bn) <2 <1.1 <0.9 <0.4 <1.4 COD 2017-18 2017-18 2018 2018 2016-17 PPA duration 20 20 15 20 15-20 PPA currency 1 BRL ZAR USD USD USD Equity IRR 12-14% USD 11-13% EUR 12-14% USD 13-15% USD 10-12% USD Leveraging on its competitive advantages, Enel outbids competition preserving returns 1. Mexico remuneration also includes Green Certificates (20 years); USA remuneration also includes NOLs (5 years) and PTCs (15 years) 125

200.0 150.0 100.0 50.0 0.0 Investor presentation Engineering and Construction Construction capacity 1 2013-19 (GW) Average projects size 2013-19 (MW) 2.5x 2.1 2.3 38% 46% 2x 1 10x 165 1 190 0.9 100% 62% 54% 70 20 100 80 2013-15A 2016A 2017-19E Consolidated BSO 2013-15 2016 2017-19 Wind Solar Record built in one single year reinforces proof of leading internal capabilities 1. Includes hydro, geothermal and biomass projects. 2013-15 and 2017-19 values are averages 126

Investor presentation Industrial growth: 2017-19 capacity additions and growth capex Capacity additions 1 by technology Growth capex by technology Growth capex by geography 35% 21% 6% 2% 3.5 GW 5.2 bn 8% 11% 3% 15% 23% 5.2 bn 5% 6% 57% 60% 48% Wind Solar Hydro Geo Wind Solar Hydro Geo Italy Latam America Iberia Europe Africa/Asia 1. Excludes non-organic growth for 0.9 GW 127

5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 Investor presentation Financial targets EBITDA and total capex ( bn) Europe: price increase partially offset green certificates expiration in Italy +15% 2017 4.2 bn Latam: growth in Brazil and Chile North & Central America: assets deconsolidation - BSO Africa & Asia: strong growth due to installed capacity increase 4.0 4.0 4.2 4.5 4.6 2018 4.5 bn Europe: price increase, non organic growth, partially offset green certificates expiration in Italy Latam: growth of installed capacity, mainly in Peru and Brazil North & Central America: assets deconsolidation - BSO 2.6 1.7 1.9 2019 4.6 bn Africa & Asia: strong growth due to installed capacity increase Europe: price increase partially offset green certificates expiration in Italy Latam: capacity additions, mainly in large hydro Africa & Asia: strong growth due to capacity additions 1 2016A 2017E 2018E 2019E EBITDA Capex 1. 2016 capex includes capex related to BSO model 128

Investor presentation Global Thermal Generation

Investor presentation Positioning and key figures 1 2016A net production by technology 2016A net production by geography Key figures 2016A 28% 21% 142 TWh 51% Coal CCGT Oil & Gas 30% 19% 142 TWh 25% 26% Italy Iberia Latam Europe Installed capacity (GW) 43.5 Net production (TWh) 142 Financials ( bn) EBITDA 2 1.2 Cash cost 2.5 Opex 1.9 Maintenance capex 0.6 Growth capex 0.4 Total capex 1.0 1. Excludes nuclear contribution 2. Excludes 191 mn of Slovenske Elektrarne in 2016, excludes nuclear in Spain 130

120 100 80 60 40 20 - Investor presentation Capacity strategy Key levers Installed capacity 1 (GW) EBITDA per MW 2 (k /MW) Spending allocation based on plant profitability -39% +36% Asset rotation opportunities, leveraging on strategic positioning Efficiencies along the entire value chain 53.4 43.5 21.0 12.3 32.7 7.2 16.2 15.1 14.1 16.2 16.1 11.4 ~33 ~34 ~45 2014E 2016E 2019A Coal CCGT Oil&Gas 2014A 2016E 2019E Ongoing installed capacity optimization 1. Excludes nuclear 2. Net of italian marginal assets effects 131

100 % 80% 60% 40% 20% 0% 240.00 220.00 200.00 180.00 160.00 140.00 120.00 100.00 80. 00 60. 00 Investor presentation Operational performance Availability (%) +5% CCGT start up time 1 (min) CCGT minimum load 2 (% nominal load) 86% 88% 89% 90% 220 48% 100 27% <20% 2016E 2017E 2018E 2019E Focus on availability and efficiency for baseload fleet 2016E 2017-19E best performer 2016E Italy 2016E Spain 2017-19E best performer Constant best practices adoption towards fleet performances excellence 1. 2016 average value Italy and Spain mainland 2. 2016 average value per country 132

Investor presentation Environmental performance New challenges @2020 CO 2 Base year 2007 NO x Base year 2010 SO 2 Base year 2010 Particulates Base year 2010 Thermal Gen. -5% - 30% - 30% - 70% Best technologies assessment worldwide for environmental performances improvement Constant emissions levels reduction through investments in Italy, Spain, Chile, Colombia Coal plants shut for 5.6 GW planned within 2019 Substantial contribution to group commitments Environmental footprint improvement as a driver for the industrial strategy 133

1.4 1.2 1.0 0.8 0.6 0.4 0.2 - Investor presentation Financial targets EBITDA 1 and capex 2 ( bn) +8% 1.2 1.3 1.3 1.1 0.8 0.7 0.7 0.7 0.5 0.4 0.3 0.2 0.3 0.3 0.4 0.5 2016A 2017E 2018E 2019E Investments in coal environmental improvements especially in Italy, Iberia and Chile, sustained by internal profitability Decommissioning program in Italy impacting non recurrent spending throughout the Business Plan Margins in Latam strongly sustained by improved regulation and investments in growth in Argentina Investments in batteries leading an increase in margins EBITDA Recurrent capex Non recurrent capex 3 Value creation through efficiency and cash flow generation 1. Excludes 191 mn of Slovenske Elektrarne in 2016, excludes nuclear in Spain 2. Excludes 511 mn of Slovenske Elektrarne in 2016, excludes nuclear in Spain 3. Includes BD and environmental activities 134

Investor presentation Global Trading

3.0 2.5 2.0 1.5 1.0 0.5 0.0 100 % 80% 60% 40% 20% 0% Investor presentation Delivery on gas contract renegotiation Price review impact ( bn) Portfolio evolution (bcm, %) 25 26 3% 5% 14% 22% 26 18% 1.0 1.0 1.3 0.7 0.6 83% 73% 37% 45% 2016-19 old 2016-19 new 2017E 2019E 2021E Already negotiated To be negotiated Legacy 1 To be contracted/spot US LNG + Tap Improved renegotiation targets and reduced execution risk 1. Mainly oil-linked take or pay contracts Increasing flexibility over the plan 136

5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 Investor presentation US LNG gas portfolio Portfolio evolution (bcm) Typical long term LNG contracts exposure 4.3 0.7 1.4 0.5 0.5 2.9 1 2 Commodity Shipping Flexibility No take or pay obligation 0.7 0.9 0.9 2017 2019 2021 3 Liquefaction No flexibility Sabine pass Corpus Christi Other Starting from 2017 Enel will receive loads of US LNG, up to ~ 4.3 bcm in 2020 137

13.0 12.8 12.6 12.4 12.2 12.0 11.8 11.6 11.4 11.2 11.0 Investor presentation Group energy management Gross margin breakdown Gross margin bn 2016E 74% 2% 24% ~12.6 ~12.6 2015A 77% 1% 22% ~12.1 2014A 82% 2% 16% Generation Trading Retail 1 2014A 2015A 2016E Capturing benefits from natural hedging along the value chain 1. Includes gas retail 138

Investor presentation Italy

Investor presentation Positioning and key figures 2016 EBITDA 2016 number of customers Key figures 2016A -2% 15% 15% 2% 40% 6.6 bn 30.7 mn 11.1 mn 60% 85% 53% 28% Total customers Free customers Distributed energy (TWh) 224 RAB ( bn) 20 End users (mn) 31.5 Customers (mn) 30.7 Net production 1 (TWh) 60.9 Key financials ( bn) Networks Thermal generation Other Renewables Retail Regulated customers Free customers Residential Business EBITDA 6.6 Opex 4.2 Maintenance capex 1.3 1. Gross of pumped storage Growth capex 0.6 140

50.0 40.0 30.0 20.0 10.0 0.0 350.0 300.0 250.0 200.0 150.0 100.0 50.0 0.0 Investor presentation Retail: Italian power market Customers (mn) Energy sold (TWh) 23.0 3.7 13.7 3.6 10.1 36.7 7.3 223.4 1 199.7 282.5 1 219.9 19.3 29.4 59.1 20.2 38.9 23,7 62.6 Regulated Free Total Regulated Free Total Residential Business Enel market share of around 50% on total number of free customers Source: 2016 Enel estimate based on figures from AEEGSI, Terna 1. Includes 143.5 TWh on high voltage and medium voltage 141

58.0 48.0 38.0 28.0 18.0 8.0 70.0% 60.0% 50.0% 40.0% 30.0% 20.0% 10.0% 0.0 % 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 16.0% 11.0% 6.0 % 1.0 % -4.0% -9.0% 3.0 2.5 2.0 1.5 1.0 0.5 0.0 12.0% 10.0% 8.0 % 6.0 % 4.0 % 2.0 % 0.0 % -2.0% -4.0% -6.0% Investor presentation Retail: Enel positioning and track record Enel power customers (mn) EBITDA evolution ( bn) EBIT evolution ( bn) 49.3% 51.0% 8.6% 5.7% 30.8 30.7 30.8 30.7 4.1% 1.9 1.7% 3.3 3.5 3.8 4.0 5.1 5.7 6.4 7.1 22.4 21.5 20.6 19.6 1.3 1.1 0.9 1.5 0.5 0.7 1.0 0.4 0.4 0.3 0.4 0.4 0.5 0.7 1.3 2013A 2014A 2015A 2016A 2013A 2014A 2015A 2016A 2013A 2014A 2015A 2016A Regulated power Free power Free Gas Regulated market Free market Other EBIT margin Free power market share EBITDA margin Leadership position and very strong track record 142

250 200 150 100 50 0 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 Investor presentation Retail: Enel business evolution Energy sold (TWh) Unitary Margin index 1 Commodity business EBITDA 2 ( bn) 100 Market liberalization 75 +6% 1.8 1.9 1.9 1.9 52 56 82 94 2016A 2017E 2018E 2019E Free power customers (mn) 7.1 7.4 18.4 18.4 Regulated market Free market Free market unitary margin 2016A 2017E 2018E 2019E Sustainable EBITDA evolution thanks to higher number of customers and volumes 1. 2016 equal to 100 (based on /MWh) 2. Including gas business 143

70. 00 60. 00 50. 00 40. 00 30. 00 20. 00 10. 00 0.0 0 100.00 90. 00 80. 00 70. 00 60. 00 50. 00 40. 00 30. 00 20. 00 10. 00 0.0 0 Investor presentation Supply and demand balance 2016E (TWh) 2019E (TWh) Regulated Price driven 62 10% 30% 52 57% Business Regulated Price driven 64 1% 39% 94 40% Business Spread driven 60% 43% Mass Market Spread driven 60% 60% Mass Market Net production Energy sold Net production Energy sold From long energy to long customers 144

Investor presentation Digitalization: operations and customer data Internal processes Accomplished results Bad debt management Digital training Dunning processes Milestones by 2018 Real time request management towards robotization Back office - Integrated CRMT BPR end-to-end with DSO 100% digitalized Customer data Accomplished results Campaign automation Forecasting based automation Basic speech analytics Milestones by 2018 Data insight improvement Learning edge technologies: Artificial intelligence and BOT 1 Main targets at 2019-50% process lead time 85% of claims and written requests digitally managed 50% digital billing Digitalization to improve efficiency and customer profiling 1. Software application that runs automated high-frequency tasks 145

Enel Energia - Efficienza Energetica 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 Investor presentation Digitalization: customers engagement and new services Customer relantionship Development of new product and services Main targets at 2019 Achievements Contacts: new website and co-browsing Sales and post sales: digital sales app Digital platform: >1.2 mn members Milestones by 2018 New generation digital customer experience Achievements New plaftorm products Milestones by 2018 Catalog simplification Digital platform members (mn customers) 1.2 1.6 2.0 2.5 Predictive and custom-tailoring interaction Full digital offer 2016E 2017E 2018E 2019E Digital channels development and customer redirecting to Self- Services E-home E- mobility development E-shop Full digital offer to 100% digital ready customers Digitizalization to improve quality, customize interaction and introduce new services and products 146

35.0 33.0 31.0 29.0 27.0 25.0 23.0 21.0 19.0 17.0 15.0 140 120 100 80 60 40 20 0 20.0 18.0 16.0 14.0 12.0 10.0 8.0 6.0 4.0 2.0 0.0 Investor presentation Operational efficiency Cost to serve ( /customer) Cost to acquire -3% -12% Sales ( /activated customer) 113 110 20 18 2016E -18% 2019E 2016E 2019E Marketing ( /Free customer) 11 9 2016E More than 200 mn of total savings over the plan 2019E 147

8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 14 12 10 8 6 4 2 0 Investor presentation Financial targets EBITDA and capex ( bn) 2017-19E Cash flow generation ( bn) +14% 6.6 6.8 7.1 7.5 13.3 3.7 9.6 2.7 6.9 1.9 2.0 2.3 2.1 2016A 2017E 2018E 2019E EBITDA Capex FFO Maintenance capex FFO after maintenence capex Net growth capex Total More than 60% contribution to Group cash generation 148

Investor presentation Iberia

Investor presentation Positioning and key figures 1 2016A EBITDA 2016A Power and gas customers Key figures 2016A Capacity (GW) 22.7 22% 18% 10% 3.6 bn 11.0 mn Power 49% 18% 1.5 mn Gas RAB ( bn) 11.2 Customers (mn) 12.5 50% 51% 82% Net production (TWh) 72.3 Financials ( bn) Networks Generation Renewables Retail 2 Liberalized market SCVP tariff Liberalized market Last resort tariff EBITDA 3.6 Opex 2.3 Maintenance capex 0.6 Growth capex 0.6 1. Including EGPE fully consolidated in 2016 2. Renewables: large hydro + EGPE Total Capex 1.2 150

120.00 110.00 100.00 90.0 0 80.0 0 70.0 0 60.0 0 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 100.00 90.0 0 80.0 0 70.0 0 60.0 0 50.0 0 40.0 0 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 1.20 00 1.00 00 0.80 00 0.60 00 0.40 00 0.20 00 - Investor presentation Retail: customer base and unitary margin evolution Power market 1 Gas market 2 EBITDA evolution 3 ( bn) +6% +13% +14% 103 105 107 109 36% 37% 38% 38% 70 73 78 79 0.56 0.52 0.63 0.64 17% 17% 17% 18% 2016E 2017E 2018E 2019 2016E 2017E 2018E 2019E 11.0 11.4 1.5 1.7 2016E 2017E 2018E 2019E EBITDA 4.0% 4.1% margin ~8 ~7 ~2.5 ~2.5 Volumes (TWh) Market share % Conventional gas margin ( /MWh) # million customers Liberalized supply margin ( /MWh) 1. Volumes include Spain, Portugal and other international sales. Market share is referred to liberalized demand in Spain 2. Volumes include Spain, Portugal and other international sales (excluding gas consumption in thermal power plants and diversions). Market share is referred to Spain (excluding gas consumption in thermal power plants and diversions) 3. Includes electricity, gas and VAS business line 151

16 15 14 13 12 11 10 Investor presentation Digitalization as a driver for efficiency, quality of service and VAS Key drivers Leverage Cost to serve ( /customer) 1 Accelarate use of electronic bill (e-factura) to achieve digital engagement and reduce postal service cost Promoting digital communication with our customer base: online plattform and App Favouring customers migration from traditional to digital channels (customer website) reducing customer service cost Develop advanced digital sales abilities to maximize value and volumes sales through Digital channels 3.7 mn digital customers in 2019 (from 1.6 million in 2016) 15% digital sales in 2019 (from 8% in 2016) 3.6 mn customers with e-factura in 2019 (from 1.9 million in 2016) -7% 13.7 12.8 2016E 2019E Better quality of service New services development 1. Including Corporate and Structure costs 152

4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 Investor presentation Financial targets EBITDA and capex ( bn) 1 2017-19E Cash flow generation ( bn) +6% 3.6 3.4 3.6 3.8 8.0 2.0 6.0 2.2 1.2 1.3 1.5 1.4 3.8 2016A 2017E 2018E 2019E EBITDA Capex FFO Maintenance capex FFO after maint. capex Net growth capex FCF Strong cash flow generation will support future growth 1. Including EGPE fully consolidated in 2016 153

Investor presentation Latin America

Investor presentation Positioning and key figures 1 2016A EBITDA by business 2016A EBITDA by country Key figures 2016A Installed capacity (GW) 18.9 39% 3.6 bn 16% 27% 12% 8% 3.6 bn 18% RAB ( bn) 2 8.4 Distributed energy (TWh) 78.5 End users (mn) 15.9 46% 35% Key financials ( bn) 2016 Networks Thermal generation Renewables Retail Argentina Chile Peru Brazil Colombia EBITDA 3.6 Opex 1.5 Maintenance capex 0.7 Growth capex 2.3 1. 2016 expected 2. Expected 2 bn in Argentina by 2017 155

Investor presentation Positioning and key figures 2016A Net production by technology 2016A End users by country 29% 7% 5% 6% Hydro 62.2 TWh 53% Renewables Oil & Gas CCGT Coal 19% 12% 9% 16% Argentina Brazil 15.9 mn Chile Colombia 44% Peru 2016A Net production by country 2016A Distributed energy by country 14% 21% Argentina 10% Argentina 24% Brazil 17% Brazil 24% 62.2 TWh 9% Chile Colombia 78.5 TWh Chile Colombia 32% Peru 20% 29% Peru 156

Investor presentation Latam restructuring: efficiencies 1 mn 2016 2 2019 OLD 2019 NEW NEW vs OLD OPEX 115 279 296 +6% SG&A 24 47 69 +47% Cash Pooling 4 14 14 - Tax 45 45 45 - Total 188 385 424 10% Improving efficiency 2019 target 1. Not including renewables 2. Exchange rate /USD 2016: 1.11 157

Investor presentation Regulatory scenario Chile Peru Argentina Brazil Colombia 2016 WACC real pre tax 10.0% 12.0% 12.5%. Ampla 11.4% Coelce 12.3% 13.7% 1. Future WACC pending to be defined Regulatory cycle 4 years 4 years 5 years 5 years Ampla 4 years Coelce 5 years Next regulatory cycle 2017 2018 2017 2018 Ampla 2019 Coelce 2017 RAB 2016 1.8 bn 0.9 bn 2.3 bn 2.0 bn 1.7 bn Stable regulatory framework New framework recently approved Regulatory review ongoing 1. Average medium and high voltage 158

10.0 8.0 6.0 4.0 2.0 0.0 2.5 2.0 1.5 1.0 0.5 0.0 Investor presentation Regulatory scenario: capex and RAB evolution WACC RAB ( bn) EBITDA and capex: focus on networks ( bn) +23% 10.3 +50% 8.4 2.4 12.5% 1 11.4% 2 12.0% 13.7% 3 2.0 1 2.0 0.9 1.7 2.5 1.3 2.1 1.4 0.9 1.6 1.1 1.8 2.1 1.2 1.2 10.0% 1.8 1.9 2016 2019 Chile Colombia Peru Brazil Argentina 1. Expected RAB / expected WACC 2. 3 rd Regulatory Cycle; 4 th Regulatory cycle equals 12.3% 3. Average medium and high voltage WACC 2016A 2017E 2018E 2019E EBITDA Capex 159

Investor presentation Retail: positioning & market liberalization 2016 Total free market sales (TWh) Enel 2016 Free energy sold (TWh) (% of Total) From (2016) market share To (2019) Argentina 3% 4 128 132 0.2 5% 2.7 Brazil 23% 121 416 537 2.3 2% 10.4 5.6 17% 7.2 Chile 50% 34 34 68 3.8 18% 4.5 Colombia 32% 22 46 68 46 Regulated market Free market 4.7 20% 8.8 Peru 53% 24 21 45 16.6 33.6 High potential from further market liberalization: increase in EBITDA reaching ~ 260 mn in 2019 160

Investor presentation Industrial growth 2017-2019 Total capex Growth capex by business Growth capex by country 4% 14% 13% 68% 7.0 bn 32% 48% 4.8 bn 5% 43% 11% 4.8 bn 26% 36% Maintenance Growth Networks Thermal generation Renewables Retail Argentina Brazil Chile Colombia Peru Growth capex concentrated in renewables and networks 161

Investor presentation Financial targets EBITDA and capex ( bn) 2017-19E Cash flow generation ( bn) +42% 3.6 4.2 3.0 3.0 4.7 5.1 2.0 2.0 8.8 2.2 6.5 4.8 1.8 2016A 2017E 2018E 2019E EBITDA Capex FFO Maintenance capex FFO after maint. capex Net growth capex FCF Growth and efficiencies driving a strong EBITDA and solid cash flow generation 162

Investor presentation Disclaimer This presentation contains certain forward-looking statements that reflect the Company s management s current views with respect to future events and financial and operational performance of the Company and its subsidiaries. These forward-looking statements are based on Enel S.p.A. s current expectations and projections about future events. Because these forward-looking statements are subject to risks and uncertainties, actual future results or performance may differ materially from those expressed in or implied by these statements due to any number of different factors, many of which are beyond the ability of Enel S.p.A. to control or estimate precisely, including changes in the regulatory environment, future market developments, fluctuations in the price and availability of fuel and other risks. You are cautioned not to place undue reliance on the forward-looking statements contained herein, which are made only as of the date of this presentation. Enel S.p.A. does not undertake any obligation to publicly release any updates or revisions to any forward-looking statements to reflect events or circumstances after the date of this presentation. The information contained in this presentation does not purport to be comprehensive and has not been independently verified by any independent third party. This presentation does not constitute a recommendation regarding the securities of the Company. This presentation does not contain an offer to sell or a solicitation of any offer to buy any securities issued by Enel S.p.A. or any of its subsidiaries. Pursuant to art. 154-bis, paragraph 2, of the Italian Unified Financial Act of February 24, 1998, the executive in charge of preparing the corporate accounting documents at Enel, Alberto De Paoli, declares that the accounting information contained herein correspond to document results, books and accounting records.

Investor presentation Contact us Luca Passa Head of Group Investor Relations Elisabetta Ghezzi Investor Relations Holding Email investor.relations@enel.com Phone +39 06 8305 7975 Web site www.enel.com Donatella Izzo Investor Relations Sustainability and Other Countries Marco Donati Investor Relations Reporting and Corporate Governance Follow us 164