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Report of Foreign Issuer (6-k)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of May, 2020

Commission File Number 001-36487

Atlantica Yield plc

(Exact name of Registrant as specified in its charter)

Not applicable

(Translation of Registrant’s name into English)

Great West House, GW1, 17th floor

Great West Road

Brentford, TW8 9DF

United Kingdom

Tel: +44 203 499 0465

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

☒ Form 20-F

☐ Form 40-F

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐

This Report on Form 6-K is incorporated by reference into the Registration Statement on Form F-3 of the Registrant filed with the Securities and Exchange Commission on August 6, 2018 (File 333-226611).

Q1 2020 Earnings PresentationMay 7, 2020

DISCLAIMER Forward Looking StatementsThis presentation contains forward-looking statements. These forward-looking statements include, but are not limited to, all statements other than statements of historical facts contained in this presentation, including, without limitation, those regarding our future financial position and results of operations, our strategy, plans, objectives, goals and targets, future developments in the markets in which we operate or are seeking to operate or anticipated regulatory changes in the markets in which we operate or intend to operate. In some cases, you can identify forward-looking statements by terminology such as "aim," "anticipate," "believe," "continue," "could," "estimate," "expect," "forecast," "guidance," "intend," "is likely to," "may," "plan," "potential," "predict," "projected," "should" or "will" or the negative of such terms or other similar expressions or terminology. By their nature, forward-looking statements involve risks and uncertainties because they relate to events and depend on circumstances that may or may not occur in the future. Forward-looking statements speak only as of the date of this presentation and are not guarantees of future performance and are based on numerous assumptions. Our actual results of operations, financial condition and the development of events may differ materially from (and be more negative than) those made in, or suggested by, the forward-looking statements. Except as required by law, we do not undertake any obligation to update any forward-looking statements to reflect events or circumstances after the date hereof or to reflect the occurrence of anticipated or unanticipated events or circumstances. Investors should read the section entitled "Item 3D. Key Information—Risk Factors" and the description of our segments and business sectors in the section entitled "Item 4B. Information on the Company—Business Overview", each in our annual report for the fiscal year ended December 31, 2019 filed on Form 20-F, for a more complete discussion of the risks and factors that could affect us. Forward-looking statements include, but are not limited to, statements relating to: expected amounts, payments and closing timelines for investments; business synergies from investments; project growth strategy; accretive investment opportunities; strategic business alternatives to ensure optimal company value; estimated returns and cash available for distribution (“CAFD”) estimates, including from project debt refinancing; net corporate leverage based on CAFD estimates; debt refinancing; ESG initiative improvement; the quality of our long-term contracts; self-amortizing project debt structure and related debt reduction; the use of non-GAAP measures as a useful predicting tool for investors; the possibility to extend asset life; cost improvements from debt refinancing; the impact of COVID-19 and the ongoing economic crisis; dividends; and various other factors, including those factors discussed under “Item 1.A—“Risk Factors” in our Quarterly Report for the three-month period ended March 31, 2020 furnished on Form 6-K on the date hereof and “Item 3.D—Risk Factors” and “Item 5.A—Operating Results” in our Annual Report for the fiscal year ended December 31, 2019 filed on Form 20-F. The CAFD and other guidance incorporated into this presentation are estimates as of February 27, 2020. These estimates are based on assumptions believed to be reasonable as of the date Atlantica published its FY 2019 Financial Results. Atlantica disclaims any current intention to update such guidance, except as required by law. Non-GAAP Financial Information This presentation also includes certain non-GAAP financial measures, including Adjusted EBITDA including unconsolidated affiliates, Adjusted EBITDA including unconsolidated affiliates as a percentage of revenues (margin) and CAFD. Non-GAAP financial measures are not measurements of our performance or liquidity under IFRS as issued by IASB and should not be considered alternatives to operating profit or profit for the period or any other performance measures derived in accordance with IFRS as issued by the IASB or any other generally accepted accounting principles or as alternatives to cash flow from operating, investing or financing activities. Please refer to the appendix of this presentation for a reconciliation of the non-GAAP financial measures included in this presentation to the most directly comparable financial measures prepared in accordance with IFRS as well as the reasons why management believes the use of non-GAAP financial measures in this presentation provides useful information. In our discussion of operating results, we have included foreign exchange impacts in our revenue and Adjusted EBITDA including unconsolidated affiliates by providing constant currency growth. The constant currency presentation is not a measure recognized under IFRS and excludes the impact of fluctuations in foreign currency exchange rates. We believe providing constant currency information provides valuable supplemental information regarding our results of operations. We calculate constant currency amounts by converting our current period local currency revenue and Adjusted EBITDA using the prior period foreign currency average exchange rates and comparing these adjusted amounts to our prior period reported results. This calculation may differ from similarly titled measures used by others and, accordingly, the constant currency presentation is not meant to substitute for recorded amounts presented in conformity with IFRS as issued by the IASB nor should such amounts be considered in isolation.

Key Messages Adjusted EBITDA including unconsolidated affiliates includes our share in EBITDA of unconsolidated affiliates (see reconciliation on page 30). +5.4% year-over-year CAFD growth in Q1 2020 up to $47.6 million Adj. EBITDA incl. unconsolidated affiliates1 decreased by 8.4% mostly due to FX and lower solar radiation in EMEA ~$320 million Green Private Placement closed in April 2020 with ~$10 million interest cost improvement per year starting in 2021 Q1 2020 dividend of $0.41 per share Continued delivery on accretive growth strategy:Option to buy Solana’s tax equity investor extendedCreation of a Renewable Energy Growth Platform with financial partners in ChilePTS reached COD, expected closing by Q3 2020$143 million recap closed and available for new investments No material impact from Covid-19 situation as of today

COVID-19 UPDATENo material impact from Covid-19 as of today Resilient business modelAll our assets are subject to long-term contracted, take-or-pay and/or regulated revenuesStrong financial position, with long-dated debt maturitiesNevertheless, difficult to forecast potential future impacts Health and Safety remains our top priorityReinforced safety measures and protocolsSituation at the plants closely monitored100% office employees working remotely with no disruptions We continue to provide reliable service to our clientsNo significant disruptions in availability or production due to COVID-19Managing Supply Chain:Increased purchases of spare parts and equipment required for operationsNo material impact, some delays in certain maintenance activities

1. Financial Results Sustainable Infrastructure

HIGHLIGHTS+5% CAFD Growth in Q1 2020 Adjusted EBITDA including unconsolidated affiliates includes our share in EBITDA of unconsolidated affiliates (see reconciliation on page 30).Adjusted EBITDA Margin including unconsolidated affiliates is defined as Adjusted EBITDA including unconsolidated affiliates divided by revenue (see reconciliation on page 32). First Quarter US $ in millions 2020 2019 ∆ Reported ∆ Excluding FX impact Revenue 210.4 221.5 (5.0)% (3.0)% Adjusted EBITDA incl. unconsolidated affiliates1 166.0 181.1 (8.4)% (6.4)% Margin2 79% 82% CAFD 47.6 45.1 +5.4%

WATER Q1 2020 Q1 2019 ∆ 6.6 5.8 +15% 5.9 5.5 +7% 90% 95% RENEWABLES Q1 2020 Q1 2019 ∆ 150.8 156.8 (4)% 113.7 123.5 (8)% 75% 79% EFFICIENT NATURAL GAS Q1 2020 Q1 2019 ∆ 26.4 34.0 (22)% 24.5 30.5 (20)% 93% 90% TRANSMISSION Q1 2020 Q1 2019 ∆ 26.6 24.9 +7% 21.9 21.7 +1% 82% 87% HIGHLIGHTSPerformance by Sector and Region By Sector US $ in millions Revenue Adjusted EBITDA incl. unconsolidated affiliates1 Margin2 EMEA NORTH AMERICA Q1 2020 Q1 2019 ∆ 59.3 60.4 (2)% 52.7 50.9 +4% 89% 84% SOUTH AMERICA Q1 2020 Q1 2019 ∆ 115.5 127.5 (9)% 84.9 102.0 (17)% 74% 80% By Region US $ in millions Revenue Adjusted EBITDA incl. unconsolidated affiliates1 Margin2 Adjusted EBITDA including unconsolidated affiliates includes our share in EBITDA of unconsolidated affiliates (see reconciliation on page 30).Adjusted EBITDA Margin including unconsolidated affiliates is defined as Adjusted EBITDA including unconsolidated affiliates divided by revenue (see reconciliation on page 32). Q1 2020 Q1 2019 ∆ 35.7 33.5 +6% 28.4 28.2 +1% 80% 84%

Includes curtailment in wind assets for which we received compensation.Represents total installed capacity in assets owned at the end of the period, regardless of our percentage of ownership in each of the assets.Electric availability refers to operational MW over contracted MW. Major maintenance overhaul in ACT held in Q1 and Q2 2019, as scheduled, which reduced production and electric availability as per contract. GWh produced also includes 30% production from Monterrey since August 2019.Includes 30% share of the investment in Monterrey since August 2, 2019.Availability refers to actual availability divided by contracted availability. KEY OPERATIONAL METRICSSteady Operational Performance WATER RENEWABLES TRANSMISSION EFFICIENT NATURAL GAS Q1 2020 Q1 2019 Availability5 101.8% 99.8% Mft3 in operation2 10.5 10.5 Q1 2020 Q1 2019 GWh produced1 526 MW in operation2 1,496 1,496 Q1 2020 Q1 2019 GWh produced3 644 Electric availability3 102.4% 87.1% MW in operation4 343 300 Q1 2020 Q1 2019 Availability5 99.9% 99.9% Miles in operation 1,166 1,152 581 383

CASH FLOWStable Operating Cash Flow Adjusted EBITDA including unconsolidated affiliates includes our share in EBITDA of unconsolidated affiliates (see reconciliation on page 30).Includes proceeds for $7.4 million Q1 2019 related to the amounts received by Solana in relation to the consent with the DOE. Consolidated cash as of March 31, 2020 increased by $127.4 million vs December 31, 2019 including FX translation differences of $(17.3) million. First Quarter US $ in millions 2020 2019 Adjusted EBITDA incl. unconsolidated affiliates1 166.0 181.1 Share in Adjusted EBITDA of unconsolidated affiliates (3.6) (2.0) Net interest and income tax paid (11.4) (13.9) Variations in working capital (59.3) (54.5) Non-monetary adjustments and other (6.0) (13.8) OPERATING CASH FLOW 85.7 96.9 INVESTING CASH FLOW2 (0.8) (22.2) FINANCING CASH FLOW 59.8 (44.7) Net change in consolidated cash3 144.7 30.0

NET DEBT POSITION1 Net debt corresponds to gross debt including accrued interest less cash and cash equivalents.Corporate Net Debt defined as indebtedness where Atlantica Yield Plc is the primary obligor minus cash and cash equivalents held at Atlantica Yield plc. Project Net Debt is defined as indebtedness where one of our subsidiaries is the primary obligor minus cash and cash equivalents held by one of our subsidiaries.Net corporate leverage calculated as corporate net debt divided by midpoint 2020 CAFD guidance before corporate debt service. US $ in millions As of Mar. 31,2020 As of Dec. 31,2019 Corporate Net Debt2 652.4 657.8 Project Net Debt3 4,241.9 4,355.6 ~$115 million NET DEBTConservative Corporate Leverage Corporate net debt / CAFD pre corporate debt service4 2.4x

2. Strategic Update Sustainable Infrastructure

STRATEGIC UPDATEHealthy Balance Sheet and Strong Liquidity Strong Liquidity and No Significant Corporate Debt Maturities in the Short-term >$400 million @ 31/03/20 Corporate Liquidity ~4.7 years average maturity1 of current corporate debt RCF’s maturities in 2021 and 2022, we intend to seek renewal as usual ~$406 million available liquidity, out of which $155 million is corporate cash as of March 31, 2020Corporate debt maturities in 2025 and 2026 Corporate Debt Maturities1 RCF As of May 7, 2020

GROWTH STRATEGYAccretive Growth Strategy Update 3 Renewable Energy Platform in Chile Solana’s TEI Acquisition 1 Option extended until August 2020 PTS acquisition 2 COD reached in Q1 2020Closing of the investment expected by late Q2 / Q3 2020 36% ownership: strategic partnerLong list of pipeline opportunities Creation of a renewable energy platform with financial partners in Chile Acquisition of a ~50 MW solar PV plant Excellent solar resourceGood operating track record$5 million first investment First Investment

FINANCINGNew Green Project Financing to Fund New Investments ~$143 million1 Recap Highlights of the New Green Financing Leveraging on our core ESG focus Net proceeds to be used for new investments Capital for growth without increasing corporate leverage $143 million Recap Already Available Entered into by the Holding Company of certain of our Spanish solar assetsNon-recourse to Atlantica. Guaranteed by assets’ distributionsExisting non-recourse projects’ debt remains in-placeAttractive conditions~3.1% interest cost275% bullet in year 5 and 25% amortizedGreen Financing in compliance with 2018 Green Loan Principles E G S Green secured finance denominated in Euros, net of 2020 debt service and fees. Amount of the facility has been converted to U.S. dollars for reporting purposes at an EUR/USD exchange rate of 1.10.The interest rate for the loan is a floating rate based on six-month EURIBOR plus a margin of 3.25%. Additionally, we have hedged the floating rate with a cap at 0% strike.

DIVIDEND Q1 2020 Dividend1 of $0.41 per share Quarterly dividends declared by the Board of Directors and paid during the following quarter. On May 6, 2020, the Board of Directors declared a dividend of $0.41 per share corresponding to the first quarter of 2020 The dividend is expected to be paid on June 15, 2020, to shareholders of record as of June 1, 2020

3. Appendix Sustainable Infrastructure

ESG FOCUSGood Progress on our ESG Commitments Improved ESG Ratings in 2019 Performance Rank Percentile Renewable Power Production 1 out of 48 1st Utilities 1 out of 442 1st Global Universe 58 out of 12,228 1st 9.7 ESG Risk Score “Negligible Risk”1 “B” rating1 Active Player in Green Financing 14% Reduction of GHG Emissions 14% reduction of GHG emissionsReporting Scope 1, 2 and 34.7 million tons of CO2 emissions avoided2 We have issued in the last 12 months: A Green Project Finance FacilityA Green Private PlacementAn ESG-linked Financial Guarantee Line According to Sustanalytics ESG Risk Rating Summary Report dated February 12, 2020 and CDP Score Report - Climate Change 2019. For further information please see both reports on our website.Calculated taking into account GHG emissions Scope 1 and 2 and energy generation of our power generation assets, both electric and thermal energy. The GHG Equivalences Calculator uses the Avoided Emissions and Generation Tool (AVERT) U.S. national weighted average CO2 marginal emissions rate to convert reductions of Kilowatt-hours into avoided units of carbon dioxide emissions. Commitment to maintain 80% of our revenues generated from low-carbon footprint assets Rating issued in January 2020Risk score improved versus last year

Weighted Average Life Project debt term 20 Represents weighted average years remaining as of December 31, 2019, and includes the acquisitions of new assets closed as of December 31, 2019. (2) Regulation term in the case of Spain and Chile TL3.(3) Mini-perm structure: semiannually sculpted debt service payments using an underlying tenor of 15 years but with contractual legal maturity in 2028. (4) Weighted average maturity of the different debt tranches. 3 3 PPAs with predefined prices for ~18 years on average1 Refinancing opportunities could increase CAFD in earlier years Possibility to extend life in many assets (excluding ATN and ATS) Tails in most assets after debt amortization 4 4 Year Contract term2 LONG-TERM STABLE CASH FLOWStrong Portfolio of Assets

FINANCINGSelf-Amortizing Project Debt Structure Key principle: non-recourse project financing in ring-fenced subsidiaries100% project debt self-amortizing progressively before the end of the contracted lifeLow interest rate risk, with +90% of interest rates fixed or hedged >$1.1B planned debt reduction in the next 4 years

Includes short-term financial investments. Exchange rates as of March 31, 2020 (EUR/USD = 1.1031) and December 31, 2019 (EUR/USD = 1.1213).Restricted cash is cash which is restricted generally due to requirements of project finance lenders. US $ in millions2 As of March 312020 As of Dec. 312019 Corporate cash at Atlantica 154.9 66.0 Existing available revolver capacity 251.0 341.0 Total Corporate Liquidity 405.9 407.0 Cash at project companies1 535.3 531.5 - Restricted3 331.9 373.6 - Other 203.4 157.9 LIQUIDITYStrong Liquidity Position1

CORPORATE DEBT DETAILSCorporate Debt as of March 31, 2020No significant maturities in the short term Exchange rates as of March 31, 2020 (EUR/USD = 1.1031).Amounts include principal amounts outstanding and interests to be paid in the short term.Total RCF limit of $425 million: $37.5 million with maturity in 2021 and $387.5 million in 2022.Other facilities include other credit lines and the commercial paper program issued in October 2019.NIFA means Note Issuance Facility Agreement. 2017 NIFA refers to the senior secured note facility dated February 10, 2017, of €275 million. 2019 NIFA refers to the senior secured note facility dated April 30, 2019, of Euro equivalent of $300 million. US $ in millions1 Maturity Amounts2 Credit Facilities (2022 Revolving CF) 20223 171.9 (Other facilities) 4 2020 / 2021 37.4 2017 NIFA5 (€ denominated) (Note 1) Repaid in April 2020 99.7 (Note 2) 99.0 (Note 3) 99.0 2019 NIFA5(€ denominated) 2025 300.3 Total 807.3 Repaid in full in April 2020, with the proceeds of the New Green Senior Secured Notes maturing in 2026 2026 319.9

Board Independent Board4 independent Directors plus CEO 3 AlgonquinAlgonquin’s voting rights and director appointment rights limited to 41.5%Board strengthening with increased diversityDeep and diverse experience and expertise: Independence, public boards, C-suite, infrastructure/renewables, ESG, M&A,... 25% of the directors are womenWill focus on continuing to execute on strategic plansNo IDRs and only one class of shares Ensuring that Atlantica benefits from strong corporate governance and effective Board oversight in the best interests of Atlantica and all of its shareholders.… BOARD COMPOSITIONStrong Corporate Governance

HISTORICAL FINANCIAL REVIEWKey Financials by Quarter Debt details Key Financials US $ in thousands US $ in millions (3) Dividends are paid to shareholders in the quarter after they are declared.Ratios presented are the ratios shown on each earnings presentations.(3) Excludes Solana debt repayments with proceeds received from Abengoa $52.5M in Mar’18. 1Q18 2Q18 3Q18 4Q18 FY 2018 1Q19 2Q19 3Q19 4Q19 FY 2019 1Q20 Revenues 225,265 287,848 323,812 206,897 1,043,822 221,452 283,338 293,373 213,289 1,011,452 210,403 F.A. EBITDA margin (%) 79.8% 91.5% 83.7% 69.7% 81.5% 81.8% 80.9% 83.4% 75.1% 80.2% 77.3% Adj. EBITDA incl. unconsolidated affiliates 179,800 263,458 271,188 144,270 858,717 181,106 229,352 247,668 163,429 821,255 165,962 Atlantica’s pro-rata share of EBITDA from unconsolidated affiliates (1,832) (2,071) (2,183) (2,024) (8,110) (2,017) (2,043) (3,062) (3,229) (10,351) (3,553) Adjusted EBITDA 177,968 261,388 269,005 142,246 850,607 179,089 227,309 244,606 160,200 811,204 162,409 Dividends from unconsolidated affiliates - - 4,432 - 4,432 - - 26,945 3,498 30,443 5,120 Non-monetary items (8,839) (60,629) (14,755) (15,057) (99,280) (14,632) (7,729) (10,288) (4,783) (37,432) (4,334) Interest and income tax paid (26,760) (133,844) (29,212) (143,721) (333,537) (13,925) (129,405) (24,339) (131,845) (299,514) (11,436) Principal amortization of indebtedness net of new indebtedness at projects (17,647) (71,028) (13,025) (127,947) (229,647) (15,176) (93,935) (22,115) (123,568) (254,794) (14,898) Deposits into/withdrawals from debt service accounts (16,631) (2,643) (26,128) 4,205 (41,197) 21,461 25,564 (52,463) 4,721 (717) 32,921 Change in non-restricted cash at project companies (63,782) 85,444 (93,166) 93,857 22,352 (61,445) 69,866 (58,847) 119,707 69,281 (50,467) Dividends paid to non-controlling interests - (6,787) (2,958) - (9,745) - (5,105) (18,978) (5,156) (29,239) (4,915) Changes in other assets and liabilities (1,278) (25,195) (51,465) 85,499 7,562 (50,253) (37,183) (38,792) 27,271 (98,957) (66,842) Cash Available For Distribution (CAFD) 43,031 46,706 42,728 39,082 171,547 45,119 49,382 45,729 50,045 190,275 47,558 Dividends declared1 32,070 34,074 36,078 37,080 139,302 39,625 40,641 41,657 41,657 163,579 41,657 # of shares at the end of the period 100,217,260 100,217,260 100,217,260 100,217,260 100,217,260 100,217,260 101,601,662 101,601,662 101,601,662 101,601,662 101,601,662 DPS (in $ per share) 0.32 0.34 0.36 0.37 1.39 0.39 0.40 0.41 0.41 1.61 0.41 Project debt 5,533.8 5,218.8 5,214.7 5,091.1 5,091.1 5,076.4 4,997.4 4,931.3 4,852.3 4,852.3 4,777.2 Project cash (604.5) (504.9) (609.6) (524.8) (524.8) (546.7) (469.0) (568.5) (496.8) (496.8) (535.3) Net project debt 4,929.3 4,713.9 4,605.1 4,566.3 4,566.3 4,529.6 4,528.4 4,362.8 4,355.6 4,355.6 4,241.9 Corporate debt 657.3 639.0 641.8 684.1 684.1 697.5 689.6 686.4 723.8 723.8 807.3 Corporate cash (151.4) (152.3) (135.1) (106.7) (106.7) (107.9) (107.0) (73.2) (66) (66) (154.9) Net corporate debt 505.9 486.8 506.7 577.4 577.4 589.7 582.6 613.2 657.8 657.8 652.4 Total net debt 5,435.2 5,200.6 5,111.8 5,143.6 5,143.6 5.119.3 5,111.0 4,976.0 5,013.3 5,013.3 4,894.4 Net Corporate Debt/CAFD pre corporate interests2 2.3x 2.2x 2.3x 2.7x 2.7x 2.5x 2.5x 2.7x 2.9x 2.9x 2.4x (4) “Deposits into/ withdrawals from restricted accounts” and “Change in non-restricted cash at project level” are calculated on a constant currency basis to reflect actual cash movements isolated from the impact of variations generated by foreign exchange changes during the period. Prior periods have been recalculated to conform this presentation. (4) (4)

HISTORICAL FINANCIAL REVIEWSegment Financials by Quarter 1Q18 2Q18 3Q18 4Q18 FY 2018 1Q19 2Q19 3Q19 4Q 19 FY 2019 1Q20 by Geography NORTH AMERICA 61,781 110,534 122,309 62,553 357,177 60,441 104,095 109,378 59,052 332,965 59,283 SOUTH AMERICA 29,536 30,345 31,928 31,405 123,214 33,493 35,597 36,671 36,447 142,207 35,654 EMEA 133,948 146,969 169,576 112,938 563,431 127,518 143,646 147,325 117,790 536,280 115,466 by Business Sector RENEWABLES 167,225 224,988 259,922 141,422 793,557 156,817 223,269 229,742 151,261 761,090 150,793 EFFICIENT NAT. GAS 28,387 33,050 33,918 35,444 130,799 34,009 27,689 31,193 29,390 122,281 26,403 TRANSMISSION 23,840 24,063 24,018 24,076 95,998 24,867 26,231 25,926 26,429 103,453 26,608 WATER 5,813 5,747 5,955 5,954 23,468 5,759 6,149 6,511 6,209 24,629 6,599 Total Revenue 225,265 287,848 323,813 206,896 1,043,822 221,452 283,338 293,373 213,289 1,011,452 210,403 1Q18 2Q18 3Q18 4Q18 FY 2018 1Q19 2Q19 3Q19 4Q19 FY 2019 1Q20 by Geography NORTH AMERICA 60,247 94,411 117,498 36,591 308,748 50,870 96,293 108,198 51,881 307,242 52,661 97.5% 85.4% 96.1% 58.5% 86.4% 84.2% 92.5% 98.9% 88.8% 92.3% 88.8% SOUTH AMERICA1 24,180 25,067 26,987 23,999 100,233 28,212 29,252 30,293 27,589 115,346 28,422 81.9% 82.6% 84.5% 76.4% 81.3% 84.2% 82.2% 82.6% 75.6% 81.1% 79.7% EMEA 95,373 143,979 126,703 83,681 449,736 102,024 103,807 109,177 83,959 398,968 84,879 71.2% 98.0% 74.7% 74.1% 79.8% 80.0% 72.3% 74.1% 71.3% 74.4% 73.5% by Business Sector RENEWABLES 131,434 213,952 220,529 98,514 664,429 123,484 177,910 192,168 110,517 604,079 113,670 78.6% 95.1% 84.8% 69.7% 83.7% 78.7% 79.7% 83.6% 73.1% 79.4% 75.4% EFFICIENT NAT. GAS 23,330 23,652 24,742 22,134 93,858 30,476 23,826 27,983 26,915 109,200 24,462 82.2% 71,.6% 72.9% 62.4% 71.8% 89.6% 86.1% 89.7% 91.6% 89.3% 92.6% TRANSMISSION1 19,837 20,463 20,148 18,014 78,463 21,650 21,936 21,548 20,524 85,658 21,922 83.2% 85.0% 83.9% 74.8% 81.7% 87.1% 83.6% 83.1% 77.6% 82.7% 82.4% WATER 5,199 5,392 5,769 5,608 21,967 5,496 5,680 5,969 5,473 22,619 5,908 89.4% 93.8% 96.9% 94.2% 93.6% 95.4% 92.4% 91.7% 88.1% 91.8% 89.5% Total Adj. EBITDA incl. unconsolidated affiliates1 179,800 263,458 271,188 144,270 858,717 181,106 229,352 247,668 163,429 821,556 165,962 79.8% 91.5% 83.7% 69.7% 82.3% 81.8% 80.9% 82.5% 76.6% 81.2% 78.7% US $ in thousands Revenue Adj. EBITDA incl. unconsolidated affiliates Adjusted EBITDA includes our share in EBITDA of unconsolidated affiliates. Additionally, it includes the dividend from our preferred equity investment in Brazil (or its compensation) of $10.4M in Q1 2017.

1Q18 2Q18 3Q18 4Q18 FY 2018 1Q19 2Q19 3Q19 4Q19 FY 2019 1Q20 RENEWABLES3 (GWh) 507 939 1,109 504 3,058 581 1,071 1,048 536 3,236 526 (GWh) 547 554 613 603 2,318 383 483 615 694 2,090 644 (electric availability %) 97.9% 99.3% 101.3% 100.9% 99.8% 87.1% 89.9% 101.5% 101.4% 95.0% 102.4% TRANSMISSION (availability %) 100.0% 99.9% 100.0% 99.8% 99.9% 99.9% 100.0% 99.9% 100% 100% 99.9% WATER (availability %) 99.1% 102.6% 103.7% 102.5% 102.0% 99.8% 100.6% 103.6% 100.1% 101.2% 101.8% 1Q18 2Q18 3Q18 4Q18 FY 2018 1Q19 2Q19 3Q19 4Q19 FY 2019 1Q20 RENEWABLES (MW) 1,446 1,446 1,446 1,496 1,496 1,496 1,496 1,496 1,496 1,496 1,496 EFF. NATURAL GAS2 (electric MW) 300 300 300 300 300 300 300 343 343 343 343 TRANSMISSION (Miles) 1,099 1,099 1,099 1,152 1,152 1,152 1,152 1,152 1,166 1,166 1,166 WATER (Mft3/day) 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 Capacity in operation1(at the end of the period) Production / Availability HISTORICAL FINANCIAL REVIEWKey Performance Indicators 5 6 7 Represents total installed capacity in assets owned at the end of the period, regardless of our percentage of ownership in each of the assets.Includes 30% share of the investment in Monterrey since August 2, 2019.Includes curtailment in wind assets for which we receive compensation.Efficient Natural Gas production and availability were impacted by a scheduled major maintenance in Q1 2019 and Q2 2019, which occurs periodically. GWh produced in also includes 30% production from Monterrey since August 2019.Electric availability refers to operational MW over contracted MW with PEMEX. Availability refers to actual availability adjusted as per contract.Availability refers to actual availability divided by contracted availability. EFFICIENT NATURAL GAS4

1Q18 2Q18 3Q18 4Q18 FY 2018 1Q19 2Q19 3Q19 4Q19 FY 2019 1Q20 US 18.8% 39.9% 38.9% 15.0% 28.2% 15.2% 39.8% 35.2% 16.3% 26.6% 18.2% Spain 8.8% 20.8% 30.6% 7.3% 16.9% 12.1% 26.7% 27.2% 6.7% 18.2% 8.0% Kaxu 36.9% 27.6% 29.9% 50.0% 36.0% 48.7% 27.8% 27.5% 45.4% 37.3% 28.9% WIND2 Uruguay 31.2% 34.5% 42.3% 40.7% 37.2% 33.0% 36.3% 40.9% 38.0% 37.2% 34.6% SOLAR Historical Capacity Factors1 HISTORICAL FINANCIAL REVIEWCapacity Factors Capacity factor ratio represents actual electrical energy output over a given period of time to the maximum possible electrical energy output assuming continuous operation at full nameplate capacity over that period. Historical Capacity Factors are calculated from the date of entry into operation or the acquisition of each asset. Some capacity factors are not indicative of a full period of operations.Includes curtailment production in wind assets for which we receive compensation.

SIZEABLE AND DIVERSIFIED ASSET PORTFOLIOPortfolio Breakdown Based on Estimated CAFD1 CURRENCY2 SECTOR GEOGRAPHY Based on CAFD estimates for the 2020-2024 period, including the acquisitions announced. See “Disclaimer – Forward Looking Statements”.Including the effect of currency swap agreements. of long-term interest rates in projects are fixed or hedged2 ~ 90% 90 Denominatedin USD % > 69% Renewable15% Transmission & Transport.13% Efficient Natural Gas 3% Water 45% North America35% Europe12% South America8% RoW

AT A GLANCESizeable and Diversified Asset Portfolio As of December 31, 2019 ASSET TYPE STAKE LOCATION GROSSCAPACITY OFFTAKER RATING 1 YEARS INCONTRACT LEFT CURRENCY RENEWABLE ENERGY Solana 100%2 USA (Arizona) 280 MW APS A-/A2/A- 24 USD Mojave 100% USA (California) 280 MW PG&E NR/WR/WD 20 USD Solaben 2/3 70% Spain 2x50 MW Kingdom of Spain A/Baa1/A- 18/17 EUR 4 Solacor 1/2 87% Spain 2x50 MW Kingdom of Spain A/Baa1/A- 17/17 EUR 4 PS 10/20 100% Spain 31 MW Kingdom of Spain A/Baa1/A- 12/14 EUR 4 Helioenergy 1/2 100% Spain 2x50 MW Kingdom of Spain A/Baa1/A- 17/17 EUR 4 Helios 1/2 100% Spain 2x50 MW Kingdom of Spain A-/Baa1/A- 18/18 EUR 4 Solnova 1/3/4 100% Spain 3x50 MW Kingdom of Spain A/Baa1/A- 15/15/16 EUR 4 Solaben 1/6 100% Spain 2x50 MW Kingdom of Spain A/Baa1/A- 19/19 EUR 4 Seville PV 80% Spain 1 MW Kingdom of Spain A/Baa1/A- 16 EUR Kaxu 51% South Africa 100 MW Eskom BB/Ba1/BB3 15 ZAR Palmatir 100% Uruguay 50 MW UTE BBB/Baa2/BBB-3 14 USD Cadonal 100% Uruguay 50 MW UTE BBB/Baa2/BBB-3 15 USD Melowind 100% Uruguay 50 MW UTE BBB/Baa2/BBB-3 16 USD Mini-Hydro 100% Peru 4 MW Peru BBB+/A3/BBB+ 13 USD EFFICIENT NATURAL GAS ACT 100% Mexico 300 MW Pemex BBB/Ba2/BB- 13 USD 5 Monterrey 30% Mexico 142 MW Industrial Customers Not rated 19 USD 5 ELECTRICAL TRANSMISSION ATN 100% Peru 379 miles Peru BBB+/A3/BBB+ 21 USD 5 ATS 100% Peru 569 miles Peru BBB+/A3/BBB+ 24 USD 5 ATN 2 100% Peru 81 miles Minera Las Bambas Not rated 13 USD 5 Quadra 1&2 100% Chile 81 miles Sierra Gorda Not rated 15/15 USD 5 Palmucho 100% Chile 6 miles Enel Generacion Chile BBB+/Baa1 /A- 18 USD 5 Chile TL3 100% Chile 50 miles CNE A+/A1/A Regulated USD 5 WATER Skikda 34% Algeria 3.5 Mft3/day Sonatrach & ADE Not rated 14 USD 5 Honaine 26% Algeria 7 Mft3/day Sonatrach & ADE Not rated 18 USD 5 Reflects the counterparties’ issuer credit ratings issued by S&P, Moody’s and Fitch, respectively, as of May 7, 2020.Liberty Interactive Corporation holds $300M in Class A membership interests in exchange for a share of the dividends and the taxable loss generated by Solana.For Kaxu, it refers to the credit rating of the Republic of South Africa, and for Palmatir, Cadonal and Melowind, it refers to the credit rating of Uruguay, as UTE is unrated.Gross cash in euros dollarized through currency hedges.USD denominated but payable in local currency.

NON-GAAP FINANCIAL INFORMATIONReconciliation of Non-GAAP Measures Our management believes Adjusted EBITDA including unconsolidated affiliates and CAFD are useful to investors and other users of our financial statements in evaluating our operating performance because it provides them with an additional tool to compare business performance across companies and across periods. Adjusted EBITDA is widely used by investors to measure a company’s operating performance without regard to items such as interest expense, taxes, depreciation and amortization, which can vary substantially from company to company depending upon accounting methods and book value of assets, capital structure and the method by which assets were acquired. Our management believes CAFD is a relevant supplemental measure of the Company’s ability to earn and distribute cash returns to investors and is useful to investors in evaluating our operating performance because securities analysts and other interested parties use such calculations as a measure of our ability to make quarterly distributions. In addition, CAFD is used by our management team for determining future acquisitions and managing our growth. Adjusted EBITDA and CAFD are widely used by other companies in the same industry. Our management uses Adjusted EBITDA and CAFD as measures of operating performance to assist in comparing performance from period to period on a consistent basis. They also readily view operating trends as a measure for planning and forecasting overall expectations, for evaluating actual results against such expectations, and for communicating with our board of directors, shareholders, creditors, analysts and investors concerning our financial performance.We present non-GAAP financial measures because we believe that they and other similar measures are widely used by certain investors, securities analysts and other interested parties as supplemental measures of performance and liquidity. The non-GAAP financial measures may not be comparable to other similarly titled measures employed by other companies and they may have limitations as analytical tools. These measures may not be fit for isolated consideration or as a substitute for analysis of our operating results as reported under IFRS as issued by the IASB. Non-GAAP financial measures and ratios are not measurements of our performance or liquidity under IFRS as issued by the IASB. Thus, they should not be considered as alternatives to operating profit, profit for the period, any other performance measures derived in accordance with IFRS as issued by the IASB, any other generally accepted accounting principles or as alternatives to cash flow from operating, investing or financing activities. Some of the limitations of these non-GAAP measures are:they do not reflect our cash expenditures, future requirements for capital expenditures or contractual commitments; they do not reflect changes in, or cash requirements for, our working capital needs;they may not reflect the significant interest expense, or the cash requirements necessary, to service interest or principal payments, on our debts;although depreciation and amortization are non-cash charges, the assets being depreciated and amortized will often need to be replaced in the future and Adjusted EBITDA and CAFD do not reflect any cash requirements that would be required for such replacements;some of the exceptional items that we eliminate in calculating Adjusted EBITDA reflect cash payments that were made, or will be made in the future; andthe fact that other companies in our industry may calculate Adjusted EBITDA and CAFD differently than we do, which limits their usefulness as comparative measures.

RECONCILIATIONReconciliation of Cash Available For Distribution and Adjusted EBITDA to Profit/(loss) for the period attributable to the Company (in thousands of U.S. dollars) For the three-month period ended March 31, 2020 2019 Profit/(loss) for the period attributable to the Company $ (40,511) $ (8,957) Profit attributable to non-controlling interest 2,246 5,267 Income tax (10,147) 9,577 Share of loss/(profit) of associates carried under the equity method 668 (1,823) Financial expense, net 100,534 99,289 Operating profit $ 52,790 $ 103,353 Depreciation, amortization, and impairment charges 109,619 75,736 Adjusted EBITDA $ 162,409 $ 179,089 Atlantica’s pro-rata share of EBITDA from unconsolidated affiliates 3,553 2,017 Adjusted EBITDA including unconsolidated affiliates1 $ 165,962 $ 181,106 Atlantica’s pro-rata share of EBITDA from unconsolidated affiliates (3,553) (2,017) Dividends from equity method investments 5,120 - Non-monetary items (4,334) (14,632) Interest and income tax paid (11,436) (13,925) Principal amortization of indebtedness (14,898) (15,176) Deposits into/ withdrawals from restricted accounts2 32,921 21,461 Change in non-restricted cash at project level2 (50,467) (61,445) Dividends paid to non-controlling interests (4,915) - Changes in other assets and liabilities (66,843) (50,253) Cash Available For Distribution $ 47,558 $ 45,119 Adjusted EBITDA including unconsolidated affiliates includes our share in EBITDA of unconsolidated affiliates.“Deposits into/ withdrawals from restricted accounts” and “Change in non-restricted cash at project level” are calculated on a constant currency basis to reflect actual cash movements isolated from the impact of variations generated by foreign exchange changes during the period. Prior period has been recalculated to conform this presentation.

RECONCILIATIONReconciliation of Adjusted EBITDA including unconsolidated affiliates to Net Cash Provided by Operating Activities (in thousands of U.S. dollars) For the three-month period ended March 31, 2020 2019 Net cash provided by operating activities 85,685 $ 96,889 Net interest and income tax paid 11,436 13,925 Variations in working capital 59,333 54,508 Other non-cash adjustments and other 5,955 13,767 Adjusted EBITDA 162,409 $ 179,089 Atlantica’s pro-rata share of EBITDA from unconsolidated affiliates 3,553 2,017 Adjusted EBITDA including unconsolidated affiliates1 $ 165,962 $ 181,106 Adjusted EBITDA including unconsolidated affiliates includes our share in EBITDA of unconsolidated affiliates.

RECONCILIATIONReconciliation of Adjusted EBITDA Margin including unconsolidated affiliates to Operating Profit Margin (in thousands of U.S. dollars) For the three-month period ended March 31, 2020 2019 Revenue $ 210,403 $ 221,452 Profit/(loss) for the period attributable to the Company $ (40,511) $ (8,957) Profit attributable to non-controlling interest 2,246 5,267 Income tax (10,147) 9,577 Share of loss/(profit) of associates carried under the equity method 668 (1,823) Financial expense, net 100,534 99,289 Operating profit $ 52,790 $ 103,353 Operating profit margin % 25.1 % 46.7 Depreciation, amortization, and impairment charges 52.1 34.2 Adjusted EBITDA margin % 77.2 % 80.9 Atlantica’s pro-rata share of EBITDA from unconsolidated affiliates 1.6 0.9 Adjusted EBITDA Margin including unconsolidated affiliates1 % 78.8 % 81.8 Adjusted EBITDA including unconsolidated affiliates includes our share in EBITDA of unconsolidated affiliates.

Great West House, GW1, 17th floor,Great West RoadBrentford TW8 9DFLondon (United Kingdom)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.