CONFIDENTIAL 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 firms
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 investigationsasthey 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) was filed by Athena PubcoB.V., a newly created
subsidiary of Madeleine Charging B.V., Allegosparent company (NewCo) with the SEC on September 30, 2021, and the prospectus / proxy statement which forms a part thereof will be distributed to holders of Spartans common
stock, once definitive, in connection with Spartans solicitation for proxies for the vote by Spartans 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. Spartans stockholders and other interested parties are advised
to read the Form F-4 and any amendments thereto and, once available, the definitive proxy statement and any other documents filed in connection with Spartans 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, Newfound the Proposed Business Combination. Stockholders may also obtain a copy of the Form F-4, including the proxy
statement/prospectus incorporated therein as well as other documents filed with the SEC regarding the Proposed Business Combination and other documents filed with the SEC by Newfound 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, Newfound 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 Spartans stockholders in connection with the Proposed Business Combination. Information regarding the persons who may, under SEC rules, be deemed participants in the solicitation of
Spartans stockholders in connection with the Proposed Business Combination is set forth in the proxy statement/prospectus forming a part of the Form F-4 filed with the SEC. You can find more information about Spartans directors and
executive officers in Spartans 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, is included in the proxy statement/prospectus forming a part of the Form F-4. Stockholders, potential investors and other interested persons should read the proxy statement/prospectus carefully
before making any voting or investment decisions. 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, Allegory 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 Spartans 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 Allegos and Spartans 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 partiesto successfully or timely consummate the Proposed Business Combination, including the risk that any required regulatory approvals are not
obtained, aredelayed 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 companys 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 Allegos business strategy and the timing of expected business milestones; (x) the effects of competition on
Allegos 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 Spartans 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 Spartans final prospectus dated February 8, 2021 and any Quarterly Reporton 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 Spartans or Allegos 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 Spartans
and Allego s expectations, plans or forecasts of future events and viewsas of the date of this Presentation. Spartan and Allego anticipate that subsequent events and developments will cause Spartan sand Allegos 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 Spartans and Allegos assessments as of any date subsequent to the date of this Presentation. Accordingly, undue reliance should not be placed upon the forward-looking statements.
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