Allego Enters into Strategic Partnership with ARCOS A355 Motorway, Subsidiary of VINCI Autoroutes

• Allego to build a charging site along A355 Motorway
• Project expands on robust series of contracts to build charging sites across Europe

Allego Holding B.V. ("Allego" or "the "Company"), a leading pan-European electric vehicle charging network that recently announced a business combination with Spartan Acquisition Corp. III ("Spartan") (NYSE:SPAQ), today announced that it has entered into a strategic partnership with ARCOS, a subsidiary of VINCI Autoroutes, to build a charging site along the A355 motorway in France.

The A355 Motorway is highly trafficked, with, on average, more than 28,000 individual vehicles using the road each day. Allego expects to continue to build additional sites along the highway in the coming years.

Allego's new charging site will be located at the Aire de la Bruche service area on the A355 motorway, at Strasbourg Metropole's east-west bypass. The project will install a total of 5 chargers including FC 50 kW (fast) chargers with two CCS, CHAdeMo and Type 2 sockets, and HPC 150-300 kW (ultra-fast) chargers full CCS sockets. The Aire de la Bruche charging site is expected to be operational in January 2022, and will also offer a restaurant and other facilities.

"We are pleased to expand our charging footprint alongside this well-trafficked motorway," said Mathieu Bonnet, CEO of Allego. "As the market for electric vehicles continues to rapidly grow, vehicle owners require proportional scaling of charging equipment, and we are very pleased to partner with ARCOS to expand charging infrastructure in France. We look forward to continuing to advance e-mobility across all of Europe."

About Allego

Allego delivers charging solutions for electric cars, motors, buses and trucks, for consumers, businesses and cities. Allego's end-to-end charging solutions make it easier for businesses and cities to deliver the infrastructure drivers need, while the scalability of our solutions makes us the partner of the future. Founded in 2013, Allego is a leader in charging solutions, with an international charging network comprised of more than 26,000 charge points operational throughout Europe – and growing rapidly. Our charging solutions are connected to our proprietary platform, EV-Cloud, which gives us and our customers a full portfolio of features and services to meet and exceed market demands. We are committed to providing independent, reliable and safe charging solutions, agnostic of vehicle model or network affiliation. At Allego, we strive every day to make EV charging easier, more convenient and more enjoyable for all.

About Spartan Acquisition Corp. III

Spartan Acquisition Corp. III is a special purpose acquisition entity focused on the energy value-chain and was formed for the purpose of entering into a merger, amalgamation, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses. Spartan is sponsored by Spartan Acquisition Sponsor III LLC, which is owned by a private investment fund managed by an affiliate of Apollo Global Management, Inc. (NYSE:APO). For more information, please visit www.spartanspaciii.com.

Forward-Looking Statements.

All statements other than statements of historical facts contained in this press release ("Press Release") 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 and projections of market opportunity and market share. These statements are based on various assumptions, whether or not identified in this Press Release, and on the current expectations of Allego'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 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. 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) risks related to the rollout of Allego's business strategy and the timing of expected business milestones; (iii) risks related to the consummation of the proposed business combination with Spartan being delayed or not occurring at all; (iv) risks related to political and macroeconomic uncertainty; (v) the risk that the installation of the new charging site is delayed or does not occur at all; (vi) the risk that the benefits to Allego of the new charging site are delayed, are less than anticipated or do not occur at all; and (vii) the impact of the global COVID-19 pandemic, including its impact on any of the foregoing risks. If any of these risks materialize 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 Allego does not presently know or that Allego currently believes are immaterial that could also cause actual results to differ from those contained in the forward-looking statements. In addition, forward-looking statements reflect Allego's expectations, plans or forecasts of future events and views as of the date of this Press Release. Allego anticipates that subsequent events and developments will cause Allego's assessments to change. However, while Allego may elect to update these forward-looking statements at some point in the future, Allego specifically disclaims any obligation to do so, unless required by applicable law. These forward-looking statements should not be relied upon as representing Allego's assessments as of any date subsequent to the date of this Press Release. Accordingly, undue reliance should not be placed upon the forward-looking statements.

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