CSP INC /MA/ 10-Q

Item 5. Other Information During the three months ended June 30, 2026, no director or officer of the Company adopted, modified, or terminated any “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K. 39 Table of Contents Item 6. Exhibits ​ ​ ​ Number ​ ​ Description ​ ​ ​ 31.1* ​ Rule 13(a)-14(a) / 15d-14(a) Certification of Chief Executive Officer ​ ​ ​ 31.2* ​ Rule 13(a)-14(a) / 15d-14(a) Certification of Chief Financial Officer ​ ​ ​ 32.1* ​ Section 1350 Certifications of Chief Executive Officer and Chief Financial Officer ​ ​ ​ 101* ​ The following financial statements for the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2026 formatted in eXtensible Business Reporting Language (XBRL) (a) our Condensed Consolidated Balance Sheets as of June 30, 2026 and September 30, 2025, (b) our Condensed Consolidated Statements of Operations for the three and nine months ended June 30, 2026 and 2025, (c) our Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended June 30, 2026 and 2025, (d) our Condensed Consolidated Statement of Shareholders’ Equity for the three and nine months ended June 30, 2026 and 2025, (e) our Condensed Consolidated Statements of Cash Flows for the nine months ended June 30, 2026 and 2025 and (f) the Notes to such Condensed Consolidated Financial Statements. ​ 104* ​ The cover page from this Quarterly Report on Form 10-Q for the quarter ended June 30, 2026, formatted in inline XBRL. * Filed Herewith 40 Table of Contents SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. ​ CSP INC. ​ ​ ​ August 14, 2026 By: /s/ Victor Dellovo ​ ​ Victor Dellovo ​ ​ Chief Executive Officer, ​ ​ President and Director ​ ​ ​ August 14, 2026 By: /s/ Gary W. Levine ​ ​ Gary W. Levine ​ ​ Chief Financial Officer ​ ​ ​ 41