PDF SOLUTIONS INC 10-Q

Item 5. Other Information Insider Adoption or Termination of Trading Arrangements During the quarter ended June 30, 2025 , none of our directors or officers adopted or terminated a “Rule 10b5 - 1 trading arrangement” or “non-Rule 10b5 - 1 trading arrangement,” as those terms are defined in Regulation S-K, Item 408. 41 Table of Contents Item 6. Exhibits Incorporated by Reference Exhibit Number Exhibit Description Form Filing Date Exhibit Number SEC File No. Provided Herewith 2.01 Equity Purchase Agreement, dated as of February 19, 2025, by and among PDF Solutions, Inc., SecureWise LLC and Telit IOT Solutions Inc. 8-K 2/19/2025 2.1 000-31311 3.01 Third Amended and Restated Certificate of Incorporation of PDF Solutions, Inc., and Certificate of Amendment to Third Amended and Restated Certificate of Incorporation of PDF Solutions, Inc. 10-Q 8/8/2024 3.01 000-31311 3.02 Amended and Restated Bylaws of PDF Solutions, Inc. 8-K 5/1/2019 3.1 000-31311 10.01 PDF Solutions, Inc.’ s Tenth Amended and Restated 2011 Stock Incentive Plan 8-K 6/23/2025 10.1 000-31311 10.02 PDF Solutions, Inc.’ s Second Amended and Restated 2021 Employee Stock Purchase Plan 8-K 6/23/2025 10.2 000-31311 31.01 Certification of the principal executive officer pursuant to Exchange Act Rules 13a‑14(a) and 15d‑14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. X 31.02 Certification of the principal financial and accounting officer pursuant to Exchange Act Rules 13a‑14(a) and 15d‑14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. X 32.01 Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.* X 32.02 Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.* X 101 The following financial statements from the Company’s Quarterly Report on Form 10‑Q for the quarter ended June 30, 2025, formatted in Inline XBRL: (i) Condensed Consolidated Balance Sheets, (ii) Condensed Consolidated Statements of Comprehensive Income (Loss), (iii) Condensed Consolidated Statements of Stockholders’ Equity, (iv) Condensed Consolidated Statements of Cash Flows and (v) Notes to Condensed Consolidated Financial Statements, tagged as blocks of text and including detailed tags. X 104 Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101). * Furnished, and not filed. 42 Table of Contents SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. PDF SOLUTIONS, INC. Date: August 7, 2025 By: /s/ JOHN K. KIBARIAN John K. Kibarian President and Chief Executive Officer (principal executive officer) Date: August 7, 2025 By: /s/ ADNAN RAZA Adnan Raza Executive Vice President, Finance and Chief Financial Officer (principal financial and accounting officer) 43