Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.YesNo Indicate by check mark if the registrant is not required to file reports pursuant to Section13 or Section15(d) of the Exchange Act.YesNo Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12months (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 90 days.YesNo 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 (§232.405of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).YesNo 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 emerging growth company.See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act. 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 revised financialaccounting 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 over financial reportingunder 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 correctionof an error to previously issued financial statements. 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 registrant'sexecutive 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 June30, 2025, the aggregate market value of the common stock of Cousins Properties Incorporated held by non-affiliates was $5,011,905,168 based on the closingsales price as reported on the New York Stock Exchange. As of January30, 2026, 167,981,990 shares of common stock were outstanding. DOCUMENTS INCORPORATED BY REFERENCE Portions of the Registrant’s proxy statement for the annual stockholders meeting to be held on April 28, 2026 are incorporated by reference into Part III of this Form 10-K. Table of Contents PART I Item1.BusinessItem1A.Risk FactorsItem1B.Unresolved Staff CommentsItem 1C.CybersecurityItem2.PropertiesItem 3.Legal ProceedingsItem 4.Mine Safety DisclosuresItem X.Executive Officers of the RegistrantPART IIItem 5.Market for Registrant’s Common Stock and Related Stockholder MattersItem 7.Management’s Discussion and Analysis of Financial Condition and Results of OperationsItem 7A.Quantitative and Qualitative Disclosure about Market RiskItem 8.Financial Statements and Supplementary DataItem 9.Changes in and Disagreements with Accountants on Accounting and Financial DisclosureItem 9A.Controls and ProceduresPART IIIItem 10.Directors, Executive Officers and Corporate GovernanceItem 11.Executive CompensationItem 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder MattersItem 13.Certain Relationships and Related Transactions, and Director IndependenceItem 14.Principal Accountant Fees and ServicesPART IVItem 15.Exhibits and Financial Statement SchedulesSIGNATURES FORWARD-LOOKING STATEMENTS Certain matters contained in this report are “forward-looking statements” within the meaning of the federal securities laws and are subjectto uncertainties and risks, as itemized herein. These forward-looking statements include information about possible or assumed future results ofthe business and our financial condition, liquidity, results of operations, plans, and objectives. Examples of forward-looking statements in thisAnnual Report on Form 10-K include the Company’s business and financial strategy; objectives of management; future debt financings; futureacquisitions and dispositions of operating assets, joint venture interests, and land; future acquisitions of investments in real estate debt; futuredevelopment and redevelopment opportunities; future issuances of common stock, limited partnership units, or preferred stock; futuredistributions; projected capital expenditures; market and industry trends; future occu