#107.21 Enabling Electrification allego Spartan Acquisition Corp. III CONFIDENTIAL#2CONFIDENTIAL Disclaimer This presentation (together with oral statements made in connection herewith, this "Presentation") is provided for informational purposes only and has been prepared to assist interested parties in making their own evaluation with respect to potential financing in connection with a potential business combination between Allego Holding B.V. ("Allego") and Spartan Acquisition Corp. III ("Spartan") and related transactions (the "Proposed Business Combination") and for no other purpose. By accepting this Presentation, you acknowledge and agree that all of the information contained herein or disclosed orally during this Presentation is confidential, that you will not distribute, disclose and use such information for any purpose other than for the purpose of your firm's participation in the potential financing, that you will not distribute, disclose or use such information in any way detrimental to Allego or Spartan, and that you will return to Allego and Spartan, delete or destroy this Presentation upon request. No representations or warranties, express or implied are given in, or in respect of, this Presentation. You are also being advised that the United States securities laws restrict persons with material non-public information about a company obtained directly or indirectly from that company from purchasing or selling securities of such company, or from communicating such information to any other person under circumstances in which it is reasonably foreseeable that such person is likely to purchase or sell such securities on the basis of such information. To the fullest extent permitted by law, in no circumstances will Spartan, Allego or any of their respective subsidiaries, stockholders, affiliates, representatives, partners, directors, officers, employees, advisers or agents be responsible or liable for any direct, indirect or consequential loss or loss of profit arising from the use of this Presentation, its contents, its omissions, reliance on the information contained within it, or on opinions communicated in relation thereto or otherwise arising in connection therewith. In addition, this Presentation does not purport to be all inclusive or to contain all of the information that may be required to make a full analysis of Allego or the Proposed Business Combination. Viewers of this Presentation should each make their own evaluation of Allego and of the relevance and adequacy of the information and should make such other investigations as they deem necessary. Nothing herein should be construed as legal, financial, tax or other advice. You should consult your own advisers concerning any legal, financial, tax or other considerations concerning the opportunity described herein. The general explanations included in this Presentation cannot address, and are not intended to address, your specific investment objectives, financial situations or financial needs. The Proposed Business Combination will be submitted to the stockholders of Spartan for their consideration and approval at a special meeting of stockholders. In connection with the Proposed Business Combination, a registration statement on Form F-4 (the "Form F-4") is expected to be filed by a newly created subsidiary of Allego ("NewCo") with the SEC, and the prospectus / proxy statement which will form a part thereof will be distributed to holders of Spartan's common stock, once definitive, in connection with Spartan's solicitation for proxies for the vote by Spartan's stockholders in connection with the Proposed Business Combination and other matters as described in the Form F-4. When available, Spartan will mail a definitive proxy statement and other relevant documents to its stockholders as of the record date established for voting on the Proposed Business Combination. Spartan's stockholders and other interested parties are advised to read, once available, the Form F-4 and any amendments thereto and, once available, the definitive proxy statement and any other documents filed in connection with Spartan's solicitation of proxies for its special meeting of stockholders to be held to approve the Proposed Business Combination and other matters, as these documents will contain important information about Spartan, Allego, NewCo and the Proposed Business Combination. Stockholders may also obtain a copy of the Form F-4, including the proxy statement/prospectus incorporated therein, once available, as well as other documents filed with the SEC regarding the Proposed Business Combination and other documents filed with the SEC by NewCo and Spartan, without charge, at the SEC 's website located at www.sec.gov. This Presentation does not constitute a solicitation of any proxy. Spartan, Allego, NewCo and certain of their respective directors, executive officers and other members of management and employees may, under SEC rules, be deemed to be participants in the solicitation of proxies from Spartan's stockholders in connection with the Proposed Business Combination. Information regarding the persons who may, under SEC rules, be deemed participants in the solicitation of Spartan's stockholders in connection with the Proposed Business Combination will be set forth in the proxy statement/prospectus forming a part of the Form F-4 when it is filed with the SEC. You can find more information about Spartan's directors and executive officers in Spartan's final prospectus dated February 8, 2021 and filed with the SEC on February 10, 2021. Additional information regarding the participants in the proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be included in the proxy statement/prospectus forming a part of the Form F-4 when it becomes available. Stockholders, potential investors and other interested persons should read the proxy statement/prospectus carefully when it becomes available before making any voting or investment decisions. When available, these documents can be obtained free of charge from the sources indicated above. NO OFFER OR SOLICITATION This Presentation relates to the potential financing of a portion of the Proposed Business Combination through a private placement of common stock. This Presentation shall not constitute a "solicitation" as defined in Section 14 of the Securities Exchange Act of 1934, as amended. This Presentation does not constitute an offer, or a solicitation of an offer, to buy or sell any securities, investment or other specific product, or a solicitation of any vote or approval, nor shall there be any sale of securities, investment or other specific product in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. Any offering of securities (the "Securities") will not be registered under the Securities Act of 1933, as amended (the "Securities Act"), and will be offered as a private placement to a limited number of institutional "accredited investors" as defined in Rule 501(a) (1), (2), (3) or (7) under the Act and "Institutional Accounts" as defined in FINRA Rule 4512(c). Accordingly, the Securities must continue to be held unless a subsequent disposition is exempt from the registration requirements of the Securities Act. Investors should consult with their counsel as to the applicable requirements for a purchaser to avail itself of any exemption under the Securities Act. The transfer of the Securities may also be subject to conditions set forth in an agreement under which they are to be issued. Investors should be aware that they might be required to bear the final risk of their investment for an indefinite period of time. None of NewCo, Allego or Spartan are making an offer of the Securities in any jurisdiction where the offer is not permitted. NEITHER THE SEC NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THE SECURITIES OR DETERMINED IF THIS PRESENTATION IS TRUTHFUL OR COMPLETE. We have considered whether this Presentation is "in scope" of the EU Market Abuse Regulation (known as "MAR") and have determined, based on our understanding of U.K. and E.U. MAR and market practice in the United Kingdom and the European Union, that it is not in scope. FORWARD-LOOKING STATEMENTS All statements other than statements of historical facts contained in this Presentation are forward-looking statements. Forward looking statements may generally be identified by the use of words such as "believe," "may," "will," "estimate," "continue," "anticipate," "intend," "expect," "should," "would," "plan,", "project," "forecast," "predict," "potential," "seem," "seek," "future," "outlook," "target" or other similar expressions (or the negative versions of such words or expressions) that predict or indicate future events or trends or that are not statements of historical matters. These forward-looking statements include, but are not limited to, statements regarding estimates and forecasts of other financial and performance metrics, projections of market opportunity and market share, the satisfaction of closing conditions to the potential transaction and the potential financing of the Proposed Business Combination, the level of redemptions by Spartan's public stockholders and the timing of the completion of the potential transaction, including the anticipated closing date of the Proposed Business Combination and the use of the cash proceeds therefrom. These statements are based on various assumptions, whether or not identified in this Presentation, and on the current expectations of Allego's and Spartan's management and are not predictions of actual performance. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as, and must not be relied on by any investor as a guarantee, an assurance, a prediction or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and may differ from assumptions, and such differences may be material. Many actual events and circumstances are beyond the control of Allego and Spartan. These forward-looking statements are subject to a number of risks and uncertainties, including (i) changes in domestic and foreign business, market, financial, political and legal conditions; (ii) the inability of the parties to successfully or timely consummate the Proposed Business Combination, including the risk that any required regulatory approvals are not obtained, are delayed or are subject to unanticipated conditions that could adversely affect the combined company or the expected benefits of the Proposed Business Combination or that the approval of the stockholders of Spartan is not obtained; (iii) the ability to maintain the listing of the combined company's securities on NYSE or another national securities exchange; (iv) the inability to complete the potential financing of the Proposed Business Combination; (v) the risk that the Proposed Business Combination disrupts current plans and operations of Spartan or Allego as a result of the announcement and consummation of the transaction described herein; (vi) the risk that any of the conditions to closing are not satisfied in the anticipated manner or on the anticipated timeline; (vii) the failure to realize the anticipated benefits of the Proposed Business Combination; (viii) risks relating to the uncertainty of the projected financial information with respect to Allego and costs related to the Proposed Business Combination; (ix) risks related to the rollout of Allego's business strategy and the timing of expected business milestones; (x) the effects of competition on Allego's future business and the ability of the combined company to grow and manage growth profitably, maintain relationships with customers and suppliers and retain its management and key employees; (xi) risks related to political and macroeconomic uncertainty; (xii) the outcome of any legal proceedings that may be instituted against Spartan, Allego or any of their respective directors or officers, following the announcement of the potential transaction; (xiii) the amount of redemption requests made by Spartan's public stockholders; (xiv) the ability of Spartan or the combined company to issue equity or equity linked securities or obtain debt financing in connection with the Proposed Business Combination or in the future; (xv) the impact of the global COVID 19 pandemic on any of the foregoing risks; (xvi) those factors discussed in Spartan's final prospectus dated February 8, 2021 and any Quarterly Report on Form 10-Q or any Annual Report on Form 10-K, in each case, under the heading "Risk Factors," and other documents of Spartan filed, or to be filed, with the SEC; and (xvii) the classification of its warrants for accounting purposes. If any of these risks materialize or Spartan's or Allego's assumptions prove incorrect, actual results could differ materially from the results implied by these forward- looking statements. There may be additional risks that neither Spartan nor Allego presently know or that Spartan and Allego currently believe are immaterial that could also cause actual results to differ from those contained in the forward-looking statements. In addition, forward-looking statements reflect Spartan's and Allego's expectations, plans or forecasts of future events and views as of the date of this Presentation. Spartan and Allego anticipate that subsequent events and developments will cause Spartan's and Allego's assessments to change. However, while Spartan and Allego may elect to update these forward-looking statements at some point in the future, Spartan and Allego specifically disclaim any obligation to do so, unless required by applicable law. These forward looking statements should not be relied upon as representing Spartan's and Allego's assessments as of any date subsequent to the date of this Presentation. Accordingly, undue reliance should not be placed upon the forward-looking statements. allego 1#3Disclaimer CONFIDENTIAL INDUSTRY AND MARKET DATA Although all information and opinions expressed in this Presentation, including market data and other statistical information, were obtained from sources believed to be reliable and are included in good faith, Allego and Spartan have not independently verified the information and make no representation or warranty, express or implied, as to its accuracy or completeness. Some data is also based on the good faith estimates of Allego and Spartan, which are derived from their respective reviews of internal sources as well as the independent sources described above. This Presentation contains preliminary information only, is subject to change at any time and, is not, and should not be assumed to be, complete or to constitute all the information necessary to adequately make an informed decision regarding your engagement with Allego and Spartan. USE OF PROJECTIONS This Presentation contains projected financial information with respect to Allego, including, but not limited to, estimated results for fiscal years 2021 to 2026. Such projected financial information constitutes forward-looking information, and is for illustrative purposes only and should not be relied upon as necessarily being indicative of future results. The assumptions and estimates underlying such financial forecast information are inherently uncertain and are subject to a wide variety of significant business, economic, competitive and other risks and uncertainties that could cause actual results to differ materially from those contained in the prospective financial information. See "Forward Looking Statements" paragraph above. Actual results may differ materially from the results contemplated by the financial forecast information contained in this Presentation, and the inclusion of such information in this Presentation should not be regarded as a representation by any person that the results reflected in such forecasts will be achieved. Neither Spartan's nor Allego's independent auditors have audited, reviewed, compiled or performed any procedures with respect to the projections for the purpose of their inclusion in this Presentation, and accordingly, neither of them expressed an opinion or provided any other form of assurance with respect thereto for the purpose of this Presentation. FINANCIAL INFORMATION; NON-GAAP FINANCIAL MEASURES; CURRENCY CONVERSION The financial information and data contained in this Presentation, including as of and for fiscal year 2020, is unaudited and does not conform to Regulation S-X promulgated under the Securities Act. Accordingly, such information and data may not be included in, may be adjusted in or may be presented differently in, any proxy statement, prospectus or registration statement to be filed by NewCo or Spartan with the SEC. Some of the financial information and data contained in this Presentation, such as EBITDA, Operational EBITDA and free cash flow, have not been prepared in accordance with Dutch generally accepted accounting principles ("Dutch GAAP"), United States generally accepted accounting principles ("U.S. GAAP" and together with Dutch GAAP, "GAAP", as the context may require) or the International Financial Reporting Standards ("IFRS"). We define (i) EBITDA as earnings before interest expense, taxes, depreciation and amortization, (ii) Operational EBITDA as EBITDA further adjusted for reorganization costs, certain business optimization costs, lease buyouts, anticipated board compensation costs and director and officer insurance costs and anticipated transaction costs and (iii) free cash flow as net cash flow from operating activities less capital expenditures. Spartan and Allego believe these non-GAAP measures of financial results provide useful information to management and investors regarding certain financial and business trends relating to Allego's financial condition and results of operations. Allego's management uses these non-GAAP measures for trend analyses, for purposes of determining management incentive compensation and for budgeting and planning purposes. Spartan and Allego believe that the use of these non- GAAP financial measures provides an additional tool for investors to use in evaluating projected operating results and trends and in comparing Allego's financial measures with other similar companies, many of which present similar non-GAAP financial measures to investors. Management does not consider these non-GAAP measures in isolation or as an alternative to financial measures determined in accordance with GAAP. The principal limitation of these non-GAAP financial measures is that they exclude significant expenses and income that are required by GAAP to be recorded in Allego's financial statements. In addition, they are subject to inherent limitations as they reflect the exercise of judgments by management about which expense and income are excluded or included in determining these non-GAAP financial measures. In order to compensate for these limitations, management presents non-GAAP financial measures in connection with GAAP results and reconciliations to the most directly comparable GAAP measure are provided in the Appendix to this Presentation. Allego's financial results are denominated in euros. In order to compare its results with those of comparable businesses, Allego's financial results or projected results may be denominated in US dollars in the Presentation, representing an exchange rate of 1.18 USD/EUR as of 7/23/2021. CERTAIN MATTERS REGARDING THE ACCOUNTING TREATMENT OF WARRANTS In light of the SEC's Staff Statement on Accounting and Reporting Considerations for Warrants Issued by Special Purpose Acquisition Companies issued on April 12, 2021 (the "Statement"), Spartan is currently re-evaluating the classification of its warrants for accounting purposes. If Spartan concludes that its warrants should be accounted for as a liability (rather than as equity), the fair value of the warrants will need to be determined, Spartan's previously issued financial statements may be subject to revision or restatement, and Spartan may be required to file a Form 8-K under Item 4.02 (Non Reliance on Previously Issued Financial Statements or a Related Audit Report or Completed Interim Review). Relatedly, Spartan is also assessing the adequacy of its internal controls over financial reporting and disclosure controls and procedures and is considering whether its prior disclosure on the evaluation of such internal controls needs to be revised in amended filings. This assessment may result in the identification of a material weakness in Spartan's internal controls over financial reporting and disclosure controls and procedures. The full impact of the Statement is still being assessed and as such further risks may be identified with respect thereto. TRADEMARKS AND TRADE NAMES Allego and Spartan own or have rights to various trademarks, service marks and trade names that they use in connection with the operation of their respective businesses. This Presentation also contains trademarks, service marks and trade names of third parties, which are the property of their respective owners. The use or display of third parties' trademarks, service marks, trade names or products in this Presentation is not intended to, and does not imply, a relationship with Allego or Spartan, or an endorsement or sponsorship by or of Allego or Spartan. Solely for convenience, the trademarks, service marks and trade names referred to in this Presentation may appear with the Ⓡ, TM or SM symbols, but such references are not intended to indicate, in any way, that Allego or Spartan will not assert, to the fullest extent under applicable law, their rights or the right of the applicable licensor to these trademarks, service marks and trade names. CERTAIN RISKS RELATED TO ALLEGO All references to the "Company," "Allego," "we," "us," or "our" in this presentation refer to the business of Allego. The risks presented below are certain of the general risks related to Company's business, industry and ownership structure and are not exhaustive. The list below is qualified in its entirety by disclosures contained in future filings by the Company, its affiliates or by third parties with the United States Securities and Exchange Commission ("SEC"). These risks speak only as of the date of the Presentation, and we have no obligation to update the disclosures contained herein. The risks highlighted in future filings with the SEC may differ significantly from and will be more extensive than those presented below. Additional risks related to Allego in connection with and following the consummation of the Proposed Business Combination are described above under "Forward Looking Statements." Allego is an early stage company with a history of operating losses, and expects to incur significant expenses and continuing losses for the near term and medium term. Allego has experienced rapid growth and expects to invest substantially in growth for the foreseeable future. If it fails to manage growth effectively, its business, operating results and financial condition could be adversely affected. Allego's forecasts and projections are based upon assumptions, analyses and internal estimates developed by Allego's management. If these assumptions, analyses or estimates prove to be incorrect or inaccurate, Allego's actual operating results may differ adversely and materially from those forecasted or projected. Allego's estimates of market opportunity and forecasts of market growth may prove to be inaccurate. Allego currently faces competition from a number of companies and expects to face significant competition in the future as the market for EV charging develops. Allego faces risks related to health pandemics, including the recent COVID-19 pandemic, which could have a material adverse effect on its business and results of operations. Allego relies on a limited number of suppliers and manufacturers for its hardware equipment and charging stations. A loss of any of these partners could negatively affect its business. Allego's business is subject to risks associated with construction, grid connections, permitting, cost overruns and delays, and other contingencies that may arise in the course of completing installations, and such risks may increase in the future as Allego accelerates its development, expands its charging networks and increase its service to third parties. Allego's business is subject to risks associated with increased cost of land and competition from third parties that can create cost overruns and delays and can decrease the value of some of Allego's charging stations. allego 2#4Disclaimer CONFIDENTIAL Allego's business is subject to risks associated with the price of electricity and the cost of grid connection and capacity which may hamper its profitability and growth. Allego is dependent on the availability, supply and sufficiency of electricity at its current and future charging sites. Delays and/or other restrictions on the availability of electricity would adversely affect Allego's business and results of operations. Allego's public charging points are often located in areas that must be freely accessible and may be exposed to vandalism or misuse by customers or other individuals, which would increase Allego's replacement and maintenance costs. If Allego fails to offer high-quality support to its customers and fails to maintain the availability of its charging points, its business and reputation may suffer. Allego's EV driver base and services business will depend upon the effective operation of Allego's EV Cloud Platform and its applications with mobile service providers, firmware from hardware manufacturers, mobile operating systems, communication networks and standards that Allego does not control. Allego's business is dependent upon the hardware of third parties. Issues with the quality or safety of such hardware or any deficiencies with such third parties' quality and safety controls may affect the profitability and reputation of Allego. Expansion of Allego's operations may increase such risks. While Allego to date has not made material acquisitions, should it pursue acquisitions in the future, it would be subject to risks associated with acquisitions. If Allego is unable to attract and retain key employees and hire qualified management, technical, engineering and sales personnel, its ability to compete and successfully grow its business would be harmed. Allego is expanding operations in many countries in Europe, which will expose it to additional tax, compliance, market, local rules and other risks. Members of Allego's management have limited experience in operating a public company. Allego may need to raise additional funds or debt and these funds may not be available when needed. Allego's future revenue growth will depend in significant part on its ability to increase the number of its charging sites and the sales of services to business to business customers. Computer malware, viruses, ransomware, hacking, phishing attacks and similar disruptions could result in security and privacy breaches and interruption in service, which could harm Allego's business. New technology of alternative fuels may negatively impact the growth of EV market and thus the demand for Allego's charging stations and services. The EV charging market is characterized by rapid technological change, which requires Allego to continue develop new innovations of its software platform and to keep up with new hardware technologies. Any delays in such development could adversely affect market adoption of its solutions and Allego's financial results. Certain estimates of market opportunity and forecasts of market growth included in this Presentation may prove to be inaccurate. Allego may need to defend against intellectual property infringement or misappropriation claims, which may be time-consuming and expensive. Allego's business may be adversely affected if it is unable to protect its technology and intellectual property from unauthorized use by third parties. The current lack of international standards may lead to uncertainty, additional competition and further unexpected costs. Allego's technology could have undetected defects, errors or bugs in hardware or software which could reduce market adoption, damage its reputation with current or prospective customers, and/or expose it to product liability and other claims that could materially and adversely affect its business. Interruptions, delays in service or inability to increase capacity, including internationally, at third-party data center facilities could impair the use or functionality of Allego's operation, harm its business and subject it to liability. Allego expects to incur research and development costs and devote significant resources to developing new solutions and services, new technologies, which could significantly reduce its profitability and may never result in revenue to Allego. Allego may inaccurately forecast demand of its sites and may be unable to increase the demand of its public charging points network, which could adversely affect its profitability and growth. Allego's business will depend on the utilization of its network by EV drivers and the mobility service providers ("MSPS") to offer access to our network. If EV drivers do not continue to use our network or MSPs do not continue to offer access to our network, Allego's business and operating results will be adversely affected. Failure to effectively expand Allego's sites could harm its ability to increase revenue. allego 3#5Today's Presenters allego meridiam INVESTING FOR THE COMMUNITY Julien Touati Allego Board Chairman, Meridiam Partner Capgemini Voltalis allego Alexis Galley Chief Technology Officer Carrefour (MOMA Med • /Spartan Acquisition Corp.III APOLLO ● SNCF RÉSEAU VEOLIA Geoffrey Strong Spartan Chairman & CEO, Apollo Senior Partner - Co-Lead Infrastructure and Natural Resources 12 years at Apollo 15+ years experience in the energy sector ● ● evergaz créateur d'énergies circulaires bien'ici Voltalis Joseph Romeo Spartan Director, Apollo Principal and Co-Lead of Spartan Platform 8 years at Apollo 11+ years experience in the energy and renewable sectors Mathieu Bonnet Chief Executive Officer CAR E6 Ton Louwers Chief Operating Officer Imtech THALES pwc ENGIE ● hertel Berenschot Olivia Wassenaar Spartan Director, Apollo Senior Partner - Co-Lead of Natural Resources 3 years at Apollo • 15+ years experience in the energy and renewable sectors ● CONFIDENTIAL Corinne Still Apollo Principal - Infrastructure 5 years at Apollo • 13+ years experience in the energy and renewable sectors#6Spartan III is an Extension of Apollo's Global, Integrated Platform APOLLO Spartan SPAC Platform Spartan I combined with Fisker Inc. on 10/29/20 ● ● ● Spartan II announced combination with Sunlight Financial LLC on 1/25/21 Spartan III IPO completed on 2/11/2021 Sponsored by Apollo's private equity group Global Footprint Los Angeles San Diego Houston New York Bethesda allego Madrid Private Equity $81bn AUM Note: (1) • Opportunistic buyouts ● Distressed buyouts and debt investments Corporate carve-outs • Hybrid value London Frankfurt Luxembourg • ● Shanghai. Tokyo Hong Kong Singapore • Delhi Mumbai Credit $329bn AUM ● ● Corporate and structured credit Direct origination Permanent Capital Vehicles: Athene, Athora, MidCap, BDCs, Closed-End Funds Key Highlights Founded 1990 All figures as of December 31, 2020 unless otherwise noted. AUM figures include funds that are denominated in Euros and translated into US dollars at an exchange rate of €1.00 to $1.22 as of December 31, 2020. Business segment AUM may not sum to total firm AUM due to rounding. (2) (3) Real Assets $46bn AUM 550 Investment Professionals ● Commercial real estate Global private equity and debt investments AUM¹ $455bn CONFIDENTIAL • Principal finance • Infrastructure 15 Global Offices³ IRR² 39% Represents returns of traditional Apollo private equity funds since inception in 1990 through September 30, 2020. Past performance is not indicative of future results. Please refer to Gross IRR and Net IRR endnotes and definitions at the end of this Presentation. Number may not be fully reflective of all Apollo affiliated office space worldwide. 5#7Successful Track Record in Leading Energy Transition Companies Spartan I Closed October 29, 2020 NYSE:FSR Leading producer of consumer electric vehicles, led by legendary designer Henrik Fisker $1.9bn Enterprise Value $552mm IPO Proceeds $500mm PIPE allego Spartan II Announced January 25, 2021 NYSE:SPRQ Premier residential solar point-of-sale financing platform $1.3bn Enterprise Value $345mm IPO Proceeds $250mm PIPE Source: Company information. Sunlight Financial CONFIDENTIAL Spartan III Announcement: July 2021 Operator of one of the largest pan-European fully integrated public EV Charging Networks $2.65bn Enterprise Value $552mm IPO Proceeds $150mm PIPE allego#8Investment Highlights 1 allego 5 Large and Rapidly Growing Total Addressable Market Growth in electric vehicles unlocks a significant addressable market - particularly for European charging Total TWh demand expected to grow ~8x by 2025 and ~30x by 2030 ¹ • allego 2 ● · 4 Leading Pan-European Player with a Clear First Mover Advantage One of the largest European networks of chargers and a pan-European player Partnerships with municipalities, 50+ real estate owners and 15+ OEMs Secured backlog of premium sites provides near-term visibility ● ● ● 3 ● Market Leading Proprietary Technology Provides a Competitive Advantage Proprietary 100+ variable analytics and technology platform informs optimal location / network design and performance Operating software allows compatibility with all vehicle OEMs creating an optimized user experience . Strong Unit Economics Proven ability to generate significant returns from owned sites with expected 30% + IRR and ~4-year payback at the site level CONFIDENTIAL ● ego is competitors Attractive Valuation Attractive entry valuation at a discount to both current trading level of comparable companies and precedent deSPAC transactions ected to achieve positive Operational EBITDA in 2021 and has established scale vs. Allego can operate independently and produce high margins from owned sites without reliance on government incentives Source: Company information. (1) Management estimates. 7#9Transaction Summary Spartan Acquisition Corp. III NYSE: SPAQ Transaction Structure Expected cash proceeds of $702mm: • Spartan Acquisition Corp. III has $552mm of cash held in trust PIPE size of $150mm ● Use of proceeds: 1) investments in prime locations and technology to maintain leadership 2) $556mm cash on balance sheet allego Note: (1) (2) Valuation Enterprise value of $2.65bn at $10 per share Attractive entry value compared to peers¹ • 42% discount based on projected 2025E Operational EBITDA of $377mm Market data as of July 23, 2021. USD/EUR at 1.18. Peers considered are EVgo and ChargePoint. Assuming no Spartan III shareholder redemptions. Net of transaction fees and deferred advisory fees. CONFIDENTIAL allego NYSE Capital Structure Existing Allego shareholders will roll 100% of their equity • $556mm of net cash proceeds² funds capex deployment and IT investment needs for the next 5 years • Projected Operational EBITDA positive in 2021 and cash flow positive in 2026 8#10Allego Operates One of the Largest Pan-European Public Networks Allego Highlights ~26,000 Public Charging Ports and ~12,000 Public and Non-Public Sites Across 12 Countries ¹ 2020 Gross Margin of 29% and Projected Operational EBITDA Positive in 2021 ² ~442,000 Unique Network Users and ~81% Recurring Users as of May 2021 >100% Historical Revenue Growth 3 Average Charger Utilization Rate of 6% 4 allego Source: Company information. (1) (2) (3) (4) Owned and third-party, as of June 22, 2021. 2020 unaudited. 2017-2020 CAGR. Per May 2021 data for Ultra-Fast chargers. Excludes all non- operational sites and sites that became operational in 2021. (5) (6) Leading Presence in Europe NOTE: Map includes both public and non-public sites. Operational Secured Expansion 6 Future Expansion Plans Current AC Sites 5 Current Fast and Ultra-Fast Sites 5 Select Sites in Backlog 5 CONFIDENTIAL As of December 31, 2020. Secured expansion countries refer to countries where the potential for EV charging is confirmed to be attractive enough and where installation of charging ports has already started or has been decided. 9#11Pioneer in EV Charging in Europe First Allego FC charger operational Allego founded as subsidiary of a Dutch grid 2013 (€ in mm) operator allego allego National fast charging network 2014 Development of nationwide fast charging network in the Netherlands Early Proof of Concept € 5 2015 2017A CAGR: 115% 2016 2017 Allego deploys Europe's first Ultra-Fast location Source: Company information as of December 31, 2020. (1) IFRS Unaudited. € 50 Dramatic Rollout meridiam INVESTING FOR THE COMMUNITY New owner to accelerate network growth 2020A¹ Revenue 2018 One of the largest pan- European charging networks CAGR: 70% 2019 2020 MEGA-E Mega-E First large-scale Pan-European Ultra- Fast project focusing on corridors Future Growth € 1,216 2026E CONFIDENTIAL Near-term deployment of 170 sites 2021 10#12Business Model Overview Own & Operate Build, own and operate Ultra-Fast and Fast charging sites Operator of one of the largest pan-European public EV charging networks Owned Public Charging Ports ¹ Breakdown ² AC 19,664 allego Allamo™ & Allego EV Cloud™ Proprietary Software Platforms allego Fast 733 Ultra-Fast 54 ● ● allego allego Uptime and Performance Report 9130% 143 AllamoTM software identifies premium charging sites and forecasts demand using external traffic statistics 29 Proprietary software allows compatibility and an optimized user experience for all EV drivers • Through Allego EV CloudTM, provides software solutions for EV charging owners, including payment and achieving high uptime Source: Company information as of June 22, 2021. (1) (2) Charging ports are defined as the number of sockets on al charger that are simultaneously accessible for charging. Only includes public chargers. High Value Services Offering NISSAN Carrefour Attractive, high margin third-party service contracts CONFIDENTIAL Services include site design and technical layout, authorization and billing, and operations & maintenance Third-Party Public Charging Ports Breakdown 1¹ AC 4,245 Allego is a pioneer in EV charging solutions, and its large, vehicle-agnostic European public network offers easy access for all EV drivers Fast 639 Ultra-Fast 293 11#13One of the Largest Pan-European Fast Charging Networks Current Public Infrastructure in the Most Developed EV Markets Geographic Presence # OF FAST AND ULTRA-FAST CHARGING SITES allego EnBW¹ Fortum charge & drive Owned by Infracapital IONITY Owned by 7 OEMs AID FASTNED allego 2 3 4 5 134 (1) (2) (3) 266 331 485 563 Source: Company information as of June 22, 2021, management estimates, other public sources. Data collection from ECOmovement. A location is considered UFC if there is at least 1 UFC charger, otherwise it is FC. The charger count is the total installed base. Company information, assuming every charger for Ionity is 1 charging port. (4) (5) 760 + ** +MT Data collection from ECOmovement. Fastned press release dated April 13, 2021. CONFIDENTIAL EX 12#14Allego's Focus on Proprietary Technology and Services Enables High Margin Capture allego Power Supply Charging Hardware Manufacturer Hardware agnostic, Allego selects best-of-breed cutting edge technology allego Network Asset Planning Ownership Allamo ™M Installation Operation Backend Payment & IT Source: Company information. Maintenance EV Cloud ™M Control of all steps along the value chain, based on proprietary technology informed by data collection Payment MSP Recurring, high-margin revenue streams CONFIDENTIAL EV Driver OEM Agnostic Access to Entire EV Fleet 13#15Allego is Well-Positioned to Capture Significant Value OEM-captive Operators TIONITY (€MM EXCEPT FOR CHARGING PORTS AND SITES) Financial Performance Size and Scale Offering 2021E Revenue Recurring Revenue 2021E EBITDA Networked Charging Ports Sites Geographic Presence Service Offering Proprietary Software Offering Site Forecasting Software allego (1) ១០០ (2) Independent Operators (3) allego (4) 86 8 (2) ~26,000 (3) ~12,000 (3) Already in 12 European countries EVgo 17 (1) (49) (1) ~1,400 ~800 United States Fleet partnership Third-party solution TESLA Selected presence X X Source: Company information, press releases. Based on USD forecasts from EVgo and ChargePoint investor presentations, USD/EUR rate of 1.18 as of 7/23/2021. Represents Operational EBITDA. X EVBOX Hardware Manufacturers 120 (4) X (80) (4) ΝΑ Allego's strength is supported by its market position and strong growth trajectory ΝΑ Europe, USA, Canada, and others (total of 70+) X X CONFIDENTIAL -chargepoin+ 168 (1) Includes Allego public charging ports and sites for owned and third-party AC chargers, Fast chargers and Ultra-Fast chargers of any speed as of June 22, 2021. Based on EVBox investor presentation. X (103) (1 ΝΑ North America, Europe (UK mostly) ΝΑ X 14#16Understanding the EV Charging Landscape ULTRA-FAST CHARGING Own & Operate allego allego Services Power Minimum Time to Charge to 125 Miles (from 20% to 80%) ² Target Locations Average Price per Charging Session (40kWh) ² Expected Gross Margin (2026E) allego Go-forward focus ~150-350kW (1) (2) (3) 7-16 minutes Public, Major Roads, Retail $28-34 55% Compares to average cost of 125 miles of gasoline: $34 3 ✓ ~50kW FAST CHARGING 50 minutes Public, Major Roads, Retail $24 55% 11kW 1 $14 Full suite of charging solutions for all end users and locations 40% Source: Company information, French Ministry of the Economy, AC charging expected to be de-emphasized going forward. 40 kWh charge corresponds to charging, from 20% to 80%, an "average battery" of ~70kWh and provides 125 miles additional range. Assumes fuel prices of €1.75/liter and fuel consumption of 8 liters/100 kilometers based on data from the French Ministry of Economics. AC 220 minutes CHARGING AU Public, Workplaces, Homes Un CONFIDENTIAL 15#17Proprietary Software Suite Provides a Competitive Edge in Selecting and Managing Charging Sites Allamo™ - Owned Site Identification / Assessment Allows Allego to select premium charging sites to add to its network: ● ● Identify premium sites using external traffic statistics and proprietary data book Forecast demand at site through extensive simulation; model considers over 100 factors, including EV penetration, driving behavior and EV tech development Build robust business case around site and determine returns potential Model Forecast (kWh/day) Accuracy Improves with Larger Batch Sizes ¹ Ratio (Forecast/Actuals) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 585 R² = 0.76 allego ++++ 1 Site 10 Sites 20 Sites 30 Sites 50 Sites 70 Sites 100 Sites High predictability enables strong profitability Source: Company information. (1) Ratio (Forecasts/Actuals) depends on sites' batch sizes. Allego EV CloudTM - Uptime and Payment Optimization Sophisticated CPO tool providing all essential services to owned and third-party including: ● ● Site onboarding and technical layout Authorization and billing Smart charging and load balancing Analytics and customer support allego Uptime and Performance Report All Countries or Select Downtime per Socket A Day at 10 days (ja Uptime incl. Open incidents Downtime per Sockat ( 16.39 98.34% MUN from -mot HUAW His Overall Uptin WEZIN PAN -3 WEIS Ope DENMATE SWITZERLAND BA 143 mustanga 04/12/17 04:1057. 04/12/17040915. 04/12/17040422. 04/12/57035452 04/12/17 03533 04/12/17 03514. 04/12/17 03:46:33. 04/12/1713-45-40. 29 CONFIDENTIAL countpreperiod allego Targetoncdently status Taulted Faulted Faubed 1 DEALLEGO000706 O NALLEGO000577 1 NALLEGO000291 1 DEALLEGO000706 Faulted 1 DEALLEGO000706 Faulted 36 2 NEALLEGO000099 Faulted Fauhud ONLALLEGO000/se ODEALLEGO000771 Fauted 1 MALLEGO0000959 Faulted Increases O&M margins and secures high margin third-party services contracts www.come Other Error Connectortockfal PowerSwitchFalure Othere Othermor PowerMaterfallure PowerSwitchFailure PowerMeterfailure Otherfe 16#18European EV Charging Market is Larger and Growing Faster than the US Market European Market Attributes Favour Public Fast Charging (mm of units) Regulation across Europe is accelerated relative to the US EU + UK vs. US Market Comparison (2020A-2025E) CAGR: 46% ~3.0 EU + UK ~20.0 allego EV Car Parc (1) CAGR: 47% Source: (1) ~1.4 High urbanization US rate Fast charging is essential to the widespread adoption of EVs ~9.7 2020A (TWh) ::: d::::::: CAGR: 87% ~0.4 2025E Scarcity of in-home parking in dense cities Public Fast Charging Power Demand - SAM EU + UK O-x ~9.2 CAGR: 61% ~0.3 US CONFIDENTIAL Significant interurban traffic Company estimates. Defined as the total number of battery electric vehicles and plug-in hybrid electric vehicles used in fleet, rideshare and medium/light-duty vehicle applications. ~3.2 Public charging is expected to increase faster in Europe than the US 17#19Defining Allego's Market allego Vehicles in Operation Total Addressable Market Serviceable Addressable Market Share of Market Source: Company estimates. Note: All figures are 2025E estimates unless otherwise noted. 20 MM European EV fleet penetration in 2025 Fleet size estimated to grow by ~8x between 2020 and 2025 . 56 TWh Energy demand for total EV charging in 2025 (Europe) Electricity demand for the EV market ● CONFIDENTIAL 9 TWh Energy demand for public fast charging in 2025 Overall public charging electricity requirement Public charging as a % of total charging estimated to increase from 25% in 2020 to 50% by 2025 1.1 TWh Allego's 2025 target market share of public fast charging Allego's first mover strategy to capture premium sites across Europe ● ● ● Focus on owning and operating charging infrastructure Focus on Ultra-Fast Charging and Fast Charging given user preference & high margin opportunity 18#20High Growth Expected in European EV Fast Charging Market Serviceable Addressable Market (SAM) ¹ (TWh) 1.7 2020A 2020A TAM 6% 0.4 TWh allego 17% 9.2 TWh 12% 27.8 2025E TAM Source: Company estimates. (1) 2025E Primary focus for owned fast-charging network Strategic focus for high value-add third party services Public Fast Charging (SAM) 20% 40.2 TWh 12% Represents total public fast charging demand in the EU + UK. 108.4 40.2 68.2 2030E 2030E TAM Public AC Charging 27% 186.7 TWh Non-Public Charging Allego % market share 414.0 186.7 12% CONFIDENTIAL 227.3 2040E 2040E TAM 19#21Complementary Business Segments Address the Full Breadth of the EV Charging Opportunity Addressing all EVs (OEM agnostic) and user groups allego and operate most profitable sites Ability to identify, secure Owned Fast Charging Network Primary focus €895mm 2026E revenue 52% gross margin First leading proprietary mover advantage with planning tool Source: Company information. allego Substantial expertise in new site design and operation High Value-add Third-party Services Strategic focus for non-core technologies €321mm 2026E revenue 25% gross margin One-stop shop white-label software with suite CONFIDENTIAL complex solutions Ability to manage large and 20#22CONFIDENTIAL Allego is a Leader in Identifying and Securing Exclusive Access to Premium Locations to Deploy EV Charging Existing Presence 1,719 Large-Scale Project Wins, Including Carrefour, Provide Visibility Into Future Charging Unit Deployment allego Public fast charging sites in operation Demand forecasting capabilities confirmed Secured Backlog ¹ 1 ~500 Additional Sites 4,539 Total Allego Owned and Third-Party Fast and Ultra-Fast Charging Ports 2,820 10- to 15-year lease or MOU signed for premium sites Exclusivity secured Source: Company information. Data as of June 22, 2021. (1) Pipeline ¹ ~500 Additional Sites Represents backlog and pipeline of charging ports in 2023 and 2024, respectively. 7,609 3,070 As EV traffic builds, existing sites are upgraded with additional chargers to support increased throughput and charging sessions Additional premium sites identified Exclusivity in discussion 21#23Allego Offers High Value Services for Third Parties that Generate Traffic on Allego's Network Installation Consulting and Services Design, supervise the building of and calibrate sites for third parties ● Manage site installation for customers Overview of Key Service Contracts Project Offering includes network planning and hardware selection Addressable Need Strategic Fit allego ● ● ● ● ● ● ● ● Operations & Maintenance Run and service charging sites NISSAN All-in service to dealers Operate sites on behalf of third parties Perform preventive and corrective maintenance • 24/7 support Deploy 723 Fast chargers at dealerships across 14 countries 5-year O&M contract Pan-European installation services and maintenance capabilities Interoperability EV CloudTM services Flexibility to onboard new suppliers Hardware independent Access to Allego proprietary network Source: Company information. ● ● ● Software Suite ● 143 allego ● CONFIDENTIAL Provide full EV CloudTM operational support to customers Provide access to direct end-user billing Provide essential data analytics Experience with Fast and Ultra-Fast charging Deploy 14 Fast chargers and 47 Ultra-Fast chargers in the Netherlands; deploy 68 Fast chargers and 25 Ultra-Fast chargers in the UK 2-year O&M contract One of the few EV charging networks with experience in Fast and Ultra-Fast charging Installation consulting and services necessary to equip fueling stations with EV chargers • EV CloudTM services 22#24Premium and Diverse Customer and Partnership Base bp B La PLACE Uber M W T Fleets & Corporates TESLA LeasePlan КИ allego 8 HYUNDAI OEMs siz postnl VDL W NISSAN allego Source: Company information. REWE Im GEMEENTE Arnhem Berlin Hosts Carrefour DIRIGE CITY LONDON TAMOIL TOULOUSE Allego's strong positioning enables partnerships across multiple end markets CONFIDENTIAL Casino Municipalities EINDHOVEN City of Amsterdam 23#25Allego's Charging Network is Attractive for Fleet Users City of Amsterdam Taxis in Amsterdam are frequent users of Allego's network ● In collaboration with taxi operators and using Allamo™, Allego selected charging sites that would be most convenient for taxi drivers ● These sites currently average ~7 sessions per day (~14% utilization); run-rate utilization of 40% ¹ Allego's Use Case for Fleets ● MADRID City of Madrid ● REWE German supermarket chain with ~3,300 stores across Europe 'TTO KY allego fluvius Belgian utility company that manages regional electrical grid NR-746-HIA Fleet and logistics companies are beginning to shift strategically toward electric vehicles Currently in discussions to construct an e-truck highway charging hub for Lidl and other retailers in the Netherlands ● In Madrid, similar to Allego's program in Amsterdam, electric taxis benefit from public charging units CONFIDENTIAL Allego is an ideal partner for Fleet companies because of its large Ultra-Fast and Fast public charging network, as well as its charging solutions services offering Source: Company information. (1) Run-rate is considered prior to COVID-19, during which traffic volumes have been impacted significantly. allego Uber Global leader in ridesharing Assessing partnership with Uber in targeted cities; using Allego's public charging network, drivers can conveniently charge vehicles between trips 24#26Allego Has Had Success Winning EU Charging Support Programs and is Strongly Positioned for Further Mandates allego 2019 2015 2016 Fast/High-Power (SLAM) 2015 - 2018 First German project to build large multi- charger sites 27 larger Fast Charging locations (4x Fast chargers, 50kW) Location: Germany 2017 Fast (Fast-E) 2015 - 2018 Biggest EU Fast Charging project 278 Fast Charging locations (1x Fast charger, 50kW) Locations: Germany, Belgium 2018 Source: Company information. High-Power (Ultra-E) 2016-2019 First large-scale EU Ultra-Fast charging project Locations: Netherlands, Belgium, Germany and Austria 2020 2021 CONFIDENTIAL 2022 High-Power (Mega-E) 2018-2023 2023 €150M Capex Investment First large-scale pan-European Ultra-Fast project focusing on metropolitan areas EU subsidy of €29mm Total of €14mm in Ultra-Fast Charging deployments to date 202 Ultra-Fast locations (4x Ultra-Fast chargers, 350kW) Locations: 12 European countries There are numerous initiatives to support the expansion of EV charging; Allego has successfully capitalized on those policies and is well-positioned for further wins allego 25#27Allego's Reputation Drives Customer and Site Acquisitions Total Unique Users on Allego's Network ¹, 2 (in thousands of users) 7 2015A (% of total) 65% 30 2015A 83 Recurring Users on Allego's Network 2, 3 72% 144 2016A 2017A 2018A 2019A 2020A allego 70% 243 77% 369 79% 82% 2016A 2017A 2018A 2019A 2020A Source: Company information. (1) (2) (3) CONFIDENTIAL Validation from Key Customers and Users allego + euronics "EV-charging is one of our key strategic initiatives and we are happy to have Allego on board as our preferred charging partner. As a leading retail group in Europe, we have a wide geographical spread across 37 markets, hence the importance of teaming up with a partner that shares the ambition of expanding our activities in as many markets as possible... And finally we see a huge potential in selling, and installing, Home Charging solutions, where the smart and premium quality solutions that Allego can offer will be an important driver for us." - John Olsen, Managing Director, Euronics "Allego's charge points never let me down. I actually get the highest charging speeds at Allego's fast chargers... Allego is brand agnostic and doesn't differentiate between the vehicle or brand you are driving. Whether it is a motorcycle or the fastest Porsche. I really think this is Allego's most important USP compared to other networks." - Maarten H., Dutch Association of EV Drivers Unique users defined as customers who have charged on Allego's network at least once. All customer data is tracked through the ID cards/tokens used on Allego's network and required for invoicing. Recurring users defined as the difference between the total number of unique users and the total number of drivers charging on Allego's network for the first time over a given period. 26#28Allego's Primary Business Model Underpinned by Strong Unit Economics Example Site Economics (€ in '000, except €/kWh and sales in kWh) Utilization Rate Total MWh per site x Average Price (c per kWh) Charging Revenue per site Gross Profit per site Gross Margin (%) Total Capex Subsidies Total Cash Flow Cumulative Cash Flow Average Payback Period (years) 7-year IRR allego Excluding Incentives • Assumes Allego fully funds capex with no incentives . Expansion of site through periodic investment of €100,000 in capex every 2 years • Highly attractive 7-year IRR despite exclusion of subsidies 1 6.0% 168 60 € 100 € 29 28.6% (€ 327) (€ 298) (298) 4.0 44.9% Source: Company Information. Note: Year 5 17.9% 779 64 € 503 € 312 62.1% (€ 100) € 212 212 7 26.7% 1,294 67 € 868 € 589 67.8% (€ 100) € 489 1,169 Year 1 represents 2021E, Year 5 represents 2025E, and Year 7 represents 2027E. Including Incentives Total of €65,000 in subsidies received in 2021 to offset capital expenditures ● ● Price differential reflects upside captured through carbon credits; incremental ~ €0.05 per kWh 1 6.0% 168 65 € 109 € 31 28.6% (€ 327) 65 (€ 230) (230) 3.6 47.8% Year 5 17.9% 779 70 € 545 € 339 62.1% CONFIDENTIAL (€ 100) 0 € 239 339 7 26.7% 1,294 73 € 941 € 638 67.8% (€ 100) 0 € 538 1,385 27#29Detailed Revenue Forecast by Product Platform Revenue Forecast ¹ (€ in millions) € 15 € 50 (€ in millions) 2020A 2020A 100% Charging Revenue Forecast € 24 2021E 100% Charging revenue Services revenue allego € 52 2022E € 86 100% 2021E € 141 Charging Revenue Streams Sites in operation Secured backlog sites Pipeline sites Sites not yet identified 2023E . 89% ● 2021E2026E CAGR: 107% ● % of revenue from secured or identified sites € 321 2024E € 161 68% 2022E € 582 2025E 50% € 895 2026E 41% Services Revenue Streams High value installation O&M and EV Cloud Other . . . € 221 2023E € 35 Current installation backlog conversion to sales 2020A € 466 2024E Services Revenue Forecast Source: Company projections. Note: 2020 financials are shown on an unaudited IFRS basis; excludes the impact of IFRS2. (1) Based on 50 sessions per day per charger maximum. € 63 2021E € 108 2022E € 814 2025E € 80 2021E2026E CAGR: 39% 2023E € 145 2024E CONFIDENTIAL € 1,216 2026E € 231 2025E € 321 2026E 28#30Allego Offers Significant Growth and Near-Term Visibility to Positive Operational EBITDA Revenue Operational EBITDA (€ in millions) € 26 2019A (€ in millions) € 16 € 50 2020A 2019A 1 Charging revenue ¹ Capital Expenditures ² € 20 2020A € 86 allego 2021E € 125 € 161 € 108 2022E 2021E € 188 2022E 2021E2026E CAGR: 70% (1) (2) (3) € 221 € 80 € 141 2023E € 259 2023E € 466 € 145 € 321 2024E € 260 2024E Source: Company information. Note: € 814 € 231 Services revenue € 582 2025E € 309 2025E € 1,216 € 321 € 895 2026E € 296 2026E NM (€ 34) NM 2019A % margin Expected Positive Operational EBITDA in 2021 (€ 29) 2019A (€ 7) 2020A 2021E Free Cash Flow 3 8.7% (€ 34) (€ 47) 2020A € 8 2021E Unlevered FCF (€225€ 166) 15.3% € 25 2022E (€ 43) (€ 169) 2022E 21.4% € 47 2023E € 37 32.4% € 151 2024E € 138 (€ 116) CONFIDENTIAL 38.9% 2020 financials are shown on an unaudited IFRS basis; excludes the impact of IFRS2. Ultra-Fast charging revenue and charging revenue includes existing network and new sites. Capital expenditures include new owned charging ports capex and technology & other capex. Excludes capitalized financing costs and fair value of leases. Unlevered free cash flow is defined as net cash from operations less capex. € 317 2025E € 269 (€ 33) (€ 217) 2025E 2023E 2024E Unlevered FCF excl. Growth Capex 42.1% € 512 2026E € 393 € 104 2026E 29#31Summary Financial Forecast • Allego's business plan is fully funded with proceeds from the transaction and expected future debt opportunities Debt financing opportunities have not been factored into the financial forecast below ● (€ in millions) Charging Revenue Services Revenue (incl. Other Revenue) Total Revenue Growth (%) Charging Cost of Goods Sold Services & Other Cost of Goods Sold Total Cost of Goods Sold Gross Margin Gross Margin (%) Operational EBITDA Margin (%) EBITDA Capital Expenditures Change in Net Working Capital Subsidies Taxes Deferred Tax Assets Unlevered Free Cash Flow allego 1 Source: (1) 2021E € 24 63 € 86 € 14 44 € 57 € 29 33.7% € 8 8.7% (€ 120) (125) 20 10 (10) (€ 225) Company projections. Excludes capitalized borrowing costs and fair value of leases. Year ending December 31, 2023E € 141 80 € 221 37.6% 2022E € 52 108 € 161 86.3% € 34 75 € 108 € 52 32.6% € 25 15.3% € 22 (188) (2) 9 (9) (€ 169) € 86 57 € 142 € 79 35.8% € 47 21.4% € 43 (259) (2) 10 (10) (€ 217) 2024E € 321 145 € 466 110.4% € 175 106 € 282 € 184 39.5% € 151 32.4% € 146 (260) (2) (9) 9 (€ 116) 2025E € 582 231 € 814 74.6% € 291 171 € 462 € 352 43.2% € 317 38.9% € 311 (309) (13) CONFIDENTIAL (42) 20 (€ 33) 2026E € 895 321 € 1,216 49.4% € 426 242 € 668 € 548 45.1% € 512 42.1% € 506 (296) (22) (84) € 104 30#32Transaction Overview and Pro Forma Equity Ownership Transaction Overview The combined entity is to be listed on the NYSE under the name "Allego" Allego is expected to be organized in the Netherlands and to not be subject to US taxation ● ● Valuation Allego is valued at a pro forma equity value of $3.14bn Structure • Transaction is expected to close in Q4 2021 subject to satisfaction or waiver of customary closing conditions ● Combination is to be funded by SPAC trust account of $552mm¹ and PIPE proceeds of $150mm ¹ Existing shareholder will roll 100% of its equity and, together with management and former advisors, will retain 75% of the combined entity Sources & Uses ($mm) Sources Allego Equity Rollover 2 SPAC Cash in Trust PIPE Cash Proceeds Sponsor Shares Total Sources allego $mm $2,300 73.2% 552 17.6% 150 4.8% 4.4% 138 $3,140 % Note: (1) (2) (3) (4) (5) Uses Allego Equity Rollover Cash to Balance Sheet Transaction Fees 5 Deferred Advisory Fees Sponsor Shares Total Uses $mm $2,300 % 73.2% 556 17.7% 60 1.9% 87 2.8% 138 4.4% $3,140 Pro Forma Valuation 3 Share Price Pro Forma Shares Outstanding Post-Money Equity Value Less: Pro Forma Net Cash on Balance Sheet Enterprise Value Post-Money Ownership 3 Public Spartan III Shareholders PIPE Investors 3% 18% Current Management & Former Advisors 15% Balance sheet figures for Allego are as of March 31, 2021 and converted using USD/EUR of 1.175. Assuming no redemption from Spartan III public shareholders. As of March 22, 2021. Spartan III Sponsor 4% 4 Illustratively assumes Spartan III share price of $10, not including 13.8mm public warrants and 9.36mm Sponsor warrants. Includes net cash proceeds from the offering, existing cash balance of €44mm and existing debt balance of €100mm as of March 31, 2021. Assuming no redemption from Spartan III public shareholders. CONFIDENTIAL $10.00 314.0 $3,140 (490) $2,650 Current Management & Former Advisors and Other Existing Allego Shareholder together represent 75% of Allego ownership Other Existing Allego Shareholder 60% 31#33Public Comparable Universe for Allego EV Charging Peers Similar focus on owning and operating public sites ✓ Infrastructure plus software model * Different geographic focus * Not near-term EBITDA positive EVgo FASTNED allego Hardware Manufacturers Operate along the same value chain with exposure to the same growth dynamics ✓ Comparable services offering * Minimal site ownership or operation / no access to charging revenue EVBOX -chargepoin+: Source: Company materials and public sources. Integrated Players Established EV manufacturer with proprietary charging network * Charging non-core to business model * Different scale TESLA CONFIDENTIAL High-Growth Infrastructure Strong growth, capital- intensive infrastructure companies * Lower focus on ESG AMERICAN TOWER® CC CROWN CASTLE DIGITAL REALTY 길 EQUINIX 32#34Operational Benchmarking EBITDA Growth EBITDA ramp-up starting earlier than core peers 132.5% allego 2021E-2026E 42.1% allego 2026E 1 Run-Rate EBITDA Margin 2021 1 134.9% allego EVgo 2024E-2026E 36.6% EVgo 2026E 2023 ΝΑ (1) (2) (3) (4) FASTNED 40.0% FASTNED 2024E 2022 2 2 98.8% -chargepoint 2024E-2026E 16.4% -chargepoint 2026E 2024 NM EVBOX 25.0% EVBOX 2024E4 2023 26.0% TESLA 2021E-2024E Estimated First Year EBITDA Positive 18.2% TESLA 2021E CONFIDENTIAL 7.0% High-Growth Infrastructure 3 2021E-2024E 57.2% High-Growth Infrastructure 3 2021E Source: Company materials, public investor presentations and filings, FactSet. Market data as of July 23, 2021. USD/EUR at 1.18. Represents Operational EBITDA. Fastned excluded due to lack of core broker coverage. Run-rate EBITDA margin is based on management estimates. 33 High-Growth Infrastructure calculated using the median metrics of American Tower, Digital Realty, Crown Castle and Equinix. Projections are based on broker consensus estimates. EVBOX 2024E EBITDA margin based on "Subsequent Growth Phase" assumptions in December 2020 investor presentation.#35Valuation Benchmarking Enterprise Value / EBITDA Year: allego" EVgo® '24E '25E '24E '25E Year: Allego 2024 14.9x Multiple- Allego 2025- Multiple Enterprise Value / Revenue allego" 7.1x '24E '25E 4.8x Allego 2024 Multiple Allego 2025- Multiple allego 2.8x 41.9x 34.3x (1) (2) (2) EVgo™ 7.7x 6.3x $20 13.0x 10.7x '24E '25E 4.2x 3.4x -chargepoint: '24E 86.5x 27.9x '24E 7.6x '25E 2.4x 41.8x 13.5x -chargepoin+: (2) '25E 5.2x (2) DIGITAL REALTY '24E '25E 20.0x 19.1x DIGITAL REALTY '24E '25E 11.0x 10.3x 1.7x Denotes multiples at deal announcement; all other multiples based on current trading metrics CC '24E '25E 23.7x 22.9x OC CROWN CASTLE '24E 14.5x CROWN CASTLE '25E 13.9x EQUINIX '24E '25E 20.6x 19.0x Source: Company information, filings and FactSet. Market data as of July 23, 2021. USD/EUR at 1.18. Allego multiples based on enterprise value of $2.65 billion and Operational EBITDA. EVgo and ChargePoint multiples reflect both the multiples at deal announcement and multiples based on current trading metrics. EQUINIX '24E '25E 10.2x 9.4x CONFIDENTIAL A AMERICAN TOWER' '24E '25E 22.1x 22.5x #I AMERICAN TOWER '24E '25E 14.7x 14.3x 34#36Appendix CONFIDENTIAL#37EBITDA Reconciliation (€ in millions) Income before CIT Finance Costs Depreciation & Amortization EBITDA Reorganization and Severance ¹ Business Optimization Lease Buyouts Other Operational EBITDA 4 allego 3 2 Source: Company financials. Note: (1) (2) 2019A (€ 44) 6 8 (€ 30) 1 (€ 29) 2020A (€ 34) 12 10 (€ 12) 4 2 0 (€ 7) Year ending December 31, 2022E 2023E 2021E (€ 166) 13 33 (€ 120) 1 126 €8 2019-2020 figures are IFRS unaudited; do not reflect any impact of IFRS2. Reorganization and Severance includes severance costs for full-time employees and opex employees. Business Optimization includes payments to former members of the Board (2019-2020), Deferred advisory fees (2020-2021), a feasibility study for the NextGen charger (2019-2020) and a report on Allego's fit-for-growth (2019). (€ 35) 5 (3) 52 € 22 3 € 25 (€ 40) 7 77 € 43 4 € 47 2024E € 35 10 101 € 146 5 € 151 CONFIDENTIAL 2025E € 168 12 131 € 311 6 € 317 2026E € 335 12 159 € 506 Lease Buyouts includes the buyout of Allego's lease on its Ekrath, Germany office. Other includes compensation for the new Board of Directors, the cost of the new Directors & Officers (D&O) insurance policy and costs related to the potential transaction. 6 € 512 36