OneSpan Inc.

NON-GAAP RECONCILIATION

We report financial results in accordance with GAAP. We also evaluate our performance using certain non-GAAP financial metrics, including Adjusted EBITDA, which is discussed in "Compensation Discussion & Analysis". Our management believes that Adjusted EBITDA, when taken together with Net Income (Loss), its most directly comparable financial measure, provides useful supplemental information regarding the performance of our business.

We define Adjusted EBITDA as net income (loss) before interest, taxes, depreciation, amortization, long-term incentive compensation, restructuring and other related charges, and certain non-recurring items, including acquisition-related costs, rebranding costs and non-routine shareholder matters. We use Adjusted EBITDA as a simplified measure of performance for use in communicating our performance to investors and analysts and for comparisons to other companies within our industry. As a performance measure, we believe that Adjusted EBITDA presents a view of our operating results that is most closely related to serving our customers. By excluding interest, taxes, depreciation, amortization, long-term incentive compensation, restructuring costs, and certain other non-recurring items, we are able to evaluate performance without considering decisions that, in most cases, are not directly related to meeting our customers’ requirements and were either made in prior periods (e.g., depreciation, amortization, long-term incentive compensation, non-routine shareholder matters), deal with the structure or financing of the business (e.g., interest, one-time strategic action costs, restructuring costs, impairment charges) or reflect the application of regulations that are outside of the control of our management team (e.g., taxes). In addition, removing the impact of these items helps us compare our core business performance with that of our competitors.

Adjusted EBITDA is not a measure of performance under GAAP and should not be considered in isolation or as an alternative or substitute for the most directly comparable financial measure calculated in accordance with GAAP. While we believe that Adjusted EBITDA is useful for the purposes described above, it has limitations associated with its use, since it excludes items that may have a material impact on our reported results and may be different from similar measures used by other companies. A reconciliation of Net Loss to Adjusted EBITDA appears below.

ADJUSTED EBITDA

Reconciliation of Net Loss to Adjusted EBITDA

(in thousands, unaudited)

(1) Includes cost of sales depreciation and amortization expense directly related to delivering cloud subscription revenue of $1.5 million and $0 for the years ended December 31, 2023 and 2022, respectively. Costs are recorded in “Cost of goods sold - Services and other” on the consolidated statements of operations.

(2) Long-term incentive compensation includes immaterial expense for cash incentive grants awarded to employees located in jurisdictions where we do not issue stock-based compensation due to tax, regulatory or similar reasons. The expense associated with these cash incentive grants was $0.3 million and $0.2 million for the years ended December 31, 2023 and 2022, respectively.

(3) For the year ended December 31, 2023, other non-recurring items consist of $1.6 million of fees related to non-recurring projects and our acquisition of ProvenDB, and $1.4 million of fees related to non-recurring items, primarily severance payable to our former chief executive officer. For the year ended December 31, 2022, other non-recurring items consist of $4.3 million of outside services related to our strategic action plan, and a $(14.8) million non-operating gain on the sale of our investment in Promon AS.

THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. KEEP THIS PORTION FOR YOUR RECORDS DETACH AND RETURN THIS PORTION ONLY TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: Signature (Joint Owners)Signature [PLEASE SIGN WITHIN BOX] DateDate SCAN TO VIEW MATERIALS & VOTE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 00 64 29 29 _1 R 1. 0. 0. 6 ONESPAN INC. C/0 BROADRIDGE CORPORATE ISSUER SOLUTIONS, INC. P.O. BOX 1342 BRENTWOOD, NY 11717 VOTE BY INTERNET - www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 p.m. Eastern Time the day before the cut-off date or meeting date. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form. During The Meeting - Go to www.virtualshareholdermeeting.com/OSPN2024 You may attend the meeting via the Internet and vote during the meeting. Have the information that is printed in the box marked by the arrow available and follow the instructions. VOTE BY PHONE - 1-800-690-6903 Use any touch-tone telephone to transmit your voting instructions up until 11:59 p.m. Eastern Time the day before the cut-off date or meeting date. Have your proxy card in hand when you call and then follow the instructions. VOTE BY MAIL Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717. The Board of Directors recommends you vote FOR the following: 1. To elect seven directors to serve on the Board of Directors; Nominees For Against Abstain 1a. Marc Boroditsky 1b. Garry Capers 1c. Sarika Garg 1d. Marianne Johnson 1e. Michael McConnell 1f. Alfred Nietzel 1g. Marc Zenner The Board of Directors recommends you vote FOR proposals 2 and 3. For Against Abstain 2. To approve, on an advisory basis, the Company's named executive officer compensation; and For Against Abstain 3. To ratify, on an advisory basis, the appointment of KPMG LLP as the Company's independent registered public accounting firm for the fiscal year 2024. Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer.

00 00 64 29 29 _2 R 1. 0. 0. 6 Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice and Proxy Statement and Form 10-K are available at www.proxyvote.com ONESPAN INC. Annual Meeting of Stockholders June 7, 2024 10:00 AM Eastern Time This proxy is solicited by the Board of Directors The stockholder(s) hereby appoint(s) Victor Limongelli, Jorge Martell and Lara Mataac, or any of them, as proxies, each with the power to appoint their substitute, and hereby authorize(s) them to represent and to vote, as designated on the reverse side of this ballot, all of the shares of Common Stock of ONESPAN INC. that the stockholder(s) is/are entitled to vote at the Annual Meeting of Stockholders to be held at 10:00 AM, Eastern Time on June 7, 2024, at www.virtualshareholdermeeting.com/OSPN2024, and any adjournment or postponement thereof. This proxy, when properly executed, will be voted in the manner directed herein. 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