Shift4 Payments, Inc.

End-to-end payment volume

End-to-end payment volume is defined as the total dollar amount of payments that we deliver for settlement on behalf of our merchants. Included in end-to-end payment volume are dollars routed via our international payments platform and alternative payment methods, including cryptocurrency and stock donations, plus volume we route to one or more third party merchant acquirers on behalf of strategic enterprise merchant relationships. This volume does not include volume processed through our legacy gateway-only offering.

Gross revenue less network fees, EBITDA and Adjusted EBITDA

We use non-GAAP supplemental measures of our performance which include: gross revenue less network fees, which includes interchange and assessment fees; earnings before interest expense, interest income, income taxes, depreciation, and amortization (“EBITDA”); and Adjusted EBITDA.

Gross revenue less network fees represents a key performance metric that management uses to measure changes in the mix and value derived from our customer base as we continue to execute our strategy to expand our reach to serve larger, complex merchants.

Adjusted EBITDA is the primary financial performance measure used by management to evaluate its business and monitor results of operations. Adjusted EBITDA represents EBITDA further adjusted for certainnon-cash and other nonrecurring items that management believes are not indicative of ongoing operations. These adjustments include acquisition, restructuring and integration costs, revaluation of contingent liabilities, unrealized gains or losses on investments in securities, changes in TRA liability, equity-based compensation expense, and foreign exchange and other nonrecurring items. The financial impact of certain elements of these activities is often significant to our overall financial performance and can adversely affect the comparability of our operating results and investors’ ability to analyze the business from period to period.

We usenon-GAAP financial measures to supplement financial information presented on a GAAP basis. We believe that excluding certain items from our GAAP results allows management to better understand our consolidated financial performance from period to period and better project our future consolidated financial performance as forecasts are developed at a level of detail different from that used to prepare GAAP-based financial measures. Moreover, we believe thesenon-GAAP financial measures provide our stakeholders with useful information to help them evaluate our operating results by facilitating an enhanced understanding of our operating performance and enabling them to make more meaningful period to period comparisons. There are limitations to the use of thenon-GAAP financial measures presented in this proxy statement. Ournon-GAAP financial measures may not be comparable to similarly titled measures of other companies. Other companies, including companies in our industry, may calculatenon-GAAP financial measures differently than we do, limiting the usefulness of those measures for comparative purposes.

Thenon-GAAP financial measures are not meant to be considered as indicators of performance in isolation from, or as a substitute for, financial information prepared in accordance with GAAP, and should be read only in conjunction with financial information presented on a GAAP basis. Reconciliations of gross revenue less network fees, EBITDA and Adjusted EBITDA to its most directly comparable GAAP financial measure are presented below. We encourage you to review the reconciliations in conjunction with the presentation of thenon-GAAP financial measures for each of the periods presented. In future periods, we may exclude such items and may incur income and expenses similar to these excluded items.

Gross revenue less network fees:

EBITDA and Adjusted EBITDA:

3501 CORPORATE PARKWAY

CENTER VALLEY, PENNSYLVANIA 18034

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V73975-P33197

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF

FOR THE ANNUAL MEETING OF STOCKHOLDERS

TO BE HELD ON JUNE 13, 2025

The undersigned stockholder(s) of Shift4 Payments, Inc. hereby appoint(s) Nancy Disman and Jordan Frankel, or either of them, as proxies, each with the power to appoint his substitute, and hereby authorize(s) them to represent and to vote, as designated on the reverse of this proxy card, all of the shares of Class A common stock, Class B common stock, and/or Class C common stock of Shift4 Payments, Inc. that the stockholder(s) is/are entitled to vote at the Annual Meeting of Stockholders to be held at 12:00 p.m. Eastern Time on June 13, 2025, via a live webcast atwww.virtualshareholdermeeting.com/FOUR2025, and any adjournment, continuation or postponement thereof. Such proxies are authorized to vote in their discretion (x) for the election of any person to the Board of Directors if any nominee named herein becomes unable to serve or for good cause will not serve, (y) on any matter that the Board of Directors did not know would be presented at the Annual Meeting of Stockholders by a reasonable time before the proxy solicitation was made, and (z) on such other business as may properly be brought before the meeting or any adjournment, continuation or postponement thereof.

This proxy, when properly executed, will be voted in the manner directed herein by the undersigned stockholder(s). If no such direction is made, this proxy will be voted in accordance with the Board of Directors’ recommendations.

Continued and to be signed on reverse side