ANNUAL REPORT 2024 ☒☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to ALTA EQUIPMENT GROUP INC. Securities registered pursuant to Section 12(b) of the Act: Securities registered pursuant to Section 12(g) of the Act:None Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. YES☐NO☒ Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. YES☐NO☒ Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during thepreceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90days. 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 a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerginggrowth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 ofthe Exchange Act. Large accelerated filer☐Non-accelerated filer☐Emerging growth company☐ Accelerated filer☒Smaller reporting company☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revisedfinancial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ 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.☒ 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 theregistrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b).☒ Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). YES☐NO☒ As of June 30, 2024, the aggregate market value of Common Stock held by non-affiliates was approximately $215.6 million, calculated by using the closing price of theCommon Stock on such date on the New York Stock Exchange of $8.04. As of March 3, 2025, there were 32,859,690 shares of Common Stock, $0.0001 par value, and 1,200 shares of Preferred Stock, $0.0001 par value, which PreferredStock is evidenced by 1,200,000 depositary shares, issued and outstanding. DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's proxy statement relating to the 2025 Annual Meeting of Shareholders are incorporated by reference into Part III of this report. Table of Contents PART I Item 1.BusinessItem 1A.Risk FactorsItem 1B.Unresolved Staff CommentsItem 1C.CybersecurityItem 2.PropertiesItem 3.Legal ProceedingsItem 4.Mine Safety Disclosures PART II Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities21Item 6.[Reserved]23Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations23Item 7A.Quantitative and Qualitative Disclosures About Market Risk39Item 8.Financial Statements and Supplementary Data40Item 9.Changes in and Disagreements With Accountants on Accounting and Financial Disclosure70Item 9A.Controls and Procedures70Item 9B.Other Information72Item 9C.Disclosure Regarding Foreign Jurisdictions that Prevent Inspections72 PART III Item 10.Directors, Executive Officers and Corporate Governance72Item 11.Executive Compensation72Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters72Item 13.Certain Relationships and Related Transactions, and Director Independence72Item 14.Principal Accountant Fees and Services72 PART IV Item 15.Exhibits, Financial Statement Schedules73Item 16.Form 10-K Summary75Signatures76 Certain statements contained in this Annual Report on Form 10-K may be considered “forward-looking statements” as that termis defined in the Private Securities Litigation Reform Act of 1995. The forward-looking statements contained herein are subject toknown and unknown risks, uncertainties, assumptions and other factors that may cause our actual results, performanc