SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 40-F REGISTRATION STATEMENT PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 or ☒ANNUAL REPORT PURSUANT TO SECTION 13(a) OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year endedMarch 31, 2026Commission File Number: 001-39498 LIGHTSPEED COMMERCE INC. (Exact name of Registrant as specified in its charter) Canada737298-1137623(Province or other jurisdiction(Primary Standard Industrial(I.R.S. Employer 700 Saint-Antoine Street East, Suite 300Montréal, Québec, Canada H2Y 1A6(514) 907-1801 Corporation Service Company251 Little Falls DriveWilmington, New Castle County, DE 19808-1674(800) 927-9801(Name, address (including zip code) and telephone number (including area code) of agent for service in the United States) Copy to:Dan Micak, Esq.Lightspeed Commerce Inc.700 Saint-Antoine Street EastSuite 300Montréal, Québec, Canada Indicate the number of outstanding shares of each of the Registrant’s classes of capital or common stock as of the close of the period covered by this annual report: The Registrant had 137,774,851 Subordinate Voting Shares issued and outstanding as of March31, 2026. Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T(§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files). Yes☒No☐ Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 12b-2 of the Exchange Act. Emerging growth company. If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use theextended transition period for complying with any new or revised financial accounting standards† provided pursuant to Section13(a) of the Exchange Act.☐ † The term “new or revised financial accounting standard” refers to any update issued by the Financial Accounting Standards Board to its Accounting StandardsCodification after April5, 2012. Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control overfinancial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.☒ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the☐ PRIOR FILINGS MODIFIED AND SUPERSEDED This Annual Report on Form 40-F of Lightspeed Commerce Inc. ("Lightspeed", "we", "our", the "Company" or the "Registrant")for the year ended March 31, 2026, at the time of filing with the U.S. Securities and Exchange Commission (the "Commission"),modifies and supersedes all prior documents filed pursuant to Sections 13, 14 and 15(d) of the U.S. Securities Exchange Act of 1934(as amended, the "Exchange Act") for purposes of any offers or sales of any securities after the date of this filing pursuant to anyregistration statement or prospectus filed pursuant to the U.S. Securities Act of 1933 (as amended, the "Securities Act") whichincorporates by reference this Annual Report on Form 40-F (or any of the documents filed as Exhibits to this Annual Report on Form CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS Lightspeed has made in this Annual Report on Form 40-F and the documents filed as Exhibits hereto, and from time to time mayotherwise make, forward-looking statements under the provisions of the U.S. Private Securities Litigation Reform Act of 1995, Section The Company's actual future results may be materially different from any future results expressed or implied by these forward-looking The forward-looking statements represent the Company's views as of the date of this Annual Report on Form 40-F. The Companyanticipates that subsequent events and developments may cause these views to change. However, while the Company may elect toupdate these forward-looking statements at some point in the future, the Company has no current intention of doing so except to the See Lightspeed's annual information form for the year ended March 31, 2026, attached as Exhibit 99.1 to this Annual Report on Form40-F (the "Lightspeed 2026 AIF"), under the heading "Forward-Looking Information" and Lightspeed's management’s discussion andanalysis for the year ended March 31, 2026, attached as Exhibit 99.2 to this Annual Report on Form 40-F (the "Lightspeed 2026 DIFFERENCES IN UNITED STATES AND CANADIAN REPORTING PRACTICES The Company is permitted, under a multijurisd