Results of Operations and Financial Condition. On August 6, 2026, PDF Solutions, Inc. (the “Company”) issued a press release regarding its financial results and certain other information related to the second quarter ended June 30, 2026. The Company also posted on the Investors section of its website ( www.pdf.com ) a management report with regard to the second quarter ended June 30, 2026. Copies of the press release and management report are attached to this report as Exhibits 99.1 and 99.2,…

Other Events. On May 13, 2026, PDF Solutions, Inc. (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with Morgan Stanley & Co. LLC, as representative of the several underwriters named therein (collectively, the “Underwriters”), and Advantest America, Inc. (the “Selling Stockholder”) in connection with (i) the offering, issuance and sale by the Company of 1,946,630 shares of the Company’s common stock, $0.00015 par value per share (the “Common Stock”), inclu…

Results of Operations and Financial Condition. On May 7, 2026, PDF Solutions, Inc. (the “Company”) issued a press release regarding its financial results and certain other information related to the first quarter ended March 31, 2026. The Company also posted on the Investors section of its website ( www.pdf.com ) a management report with regard to the first quarter ended March 31, 2026. Copies of the press release and management report are attached to this report as Exhibits 99.1 and 99.2, re…

Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant. The information in

Entry Into a Material Definitive Agreement. On April 23, 2026, PDF Solutions, Inc. (the “ Company ”) entered into a First Amendment to Credit Agreement (the “ Amendment ”), by and among the Company, the subsidiary guarantors party thereto, the lenders party thereto and Wells Fargo Bank, National Association, as administrative agent to the lenders. The Amendment amends the Credit Agreement, dated as of March 7, 2025, by and among the Company, the lenders and other parties party thereto from ti…

Results of Operations and Financial Condition. On February 12, 2026, PDF Solutions, Inc. (the “Company”) issued a press release regarding its financial results and certain other information related to the fourth quarter and year ended December 31, 2025. The Company also posted on the Investors section of its website ( www.pdf.com ) a management report with regard to the fourth quarter and year ended December 31, 2025. Copies of the press release and management report are attached to this repo…

Results of Operations and Financial Condition. On November 6, 2025, PDF Solutions (the “Company”) issued a press release regarding its financial results and certain other information related to the third quarter ended September 30, 2025. The Company also posted on the Investors section of its website ( www.pdf.com ) a management report with regard to the third quarter ended September 30, 2025. Copies of the press release and management report are attached to this report as Exhibits 99.1 and 9…

Results of Operations and Financial Condition. On August 7, 2025, PDF Solutions (the “Company”) issued a press release regarding its financial results and certain other information related to the second quarter ended June 30, 2025. The Company also posted on the Investors section of its website ( www.pdf.com ) a management report with regard to the second quarter ended June 30, 2025. Copies of the press release and management report are attached to this report as Exhibits 99.1 and 99.2, respe…

Results of Operations and Financial Condition. ​ On May 8, 2025, PDF Solutions (the “Company”) issued a press release regarding its financial results and certain other information related to the first quarter ended March 31, 2025. The Company also posted on the Investors section of its website ( www.pdf.com ) a management report with regard to the first quarter ended March 31, 2025. Copies of the press release and management report are attached to this report as Exhibits 99.1 and 99.2, respec…

Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant. ​ The information in

Entry Into a Material Definitive Agreement. ​ On March 7, 2025, PDF Solutions, Inc. (the “ Company ”) entered into a Credit Agreement (the “ Credit Agreement ”) with the lenders who are party to the Credit Agreement and the lenders who may become a party to the Credit Agreement pursuant to the terms thereof (the “ Lenders ”) and Wells Fargo Bank, National Association, as administrative agent to the Lenders (the “ Agent ”). ​ The Credit Agreement provides for (a) a revolving credit facility in…

Completion of Acquisition or Disposition of Assets . ​ As previously disclosed, on February 19, 2025, the Company entered into an Equity Purchase Agreement (the “ Purchase Agreement ”) with Telit IOT Solutions Inc., a Delaware corporation (the “ Seller ”), and SecureWise LLC, a Delaware limited liability company (the “ Target ”), pursuant to which the Company agreed to acquire the Seller’s secureWISE business (the “ Business ”) by means of a purchase of all of the outstanding equity interests…

Entry Into a Mate rial Definitive Agreement. ​ On February 19, 2025, PDF Solutions, Inc. (the “ Company ”) entered into an Equity Purchase Agreement (the “ Purchase Agreement ”) with Telit IOT Solutions Inc., a Delaware corporation (the “ Seller ”), and SecureWise LLC, a Delaware limited liability company (the “ Target ”), pursuant to which the Company will acquire the Seller’s secureWISE business (the “ Business ”) by means of a purchase of all of the outstanding equity interests of the Targ…

Results of Operations and Financial Condition. ​ On February 13, 2025, PDF Solutions (the “Company”) issued a press release regarding its financial results and certain other information related to the fourth quarter and year ended December 31, 2024. The Company also posted on the Investors section of its website ( www.pdf.com ) a management report with regard to the fourth quarter and year ended December 31, 2024. Copies of the press release and management report are attached to this report a…

Results of Operations and Financial Condition. ​ On November 7, 2024, PDF Solutions (the “ Company ”) issued a press release regarding its financial results and certain other information related to the third quarter ended September 30, 2024. The Company also posted on the Investors section of its website ( www.pdf.com ) a management report with regard to the third quarter ended September 30, 2024. Copies of the press release and management report are attached to this report as Exhibits 99.1 a…

Results of Operations and Financial Condition. ​ On August 8, 2024, PDF Solutions (the “ Company ”) issued a press release regarding its financial results and certain other information related to the second quarter ended June 30, 2024. The Company also posted on the Investors section of its website ( www.pdf.com ) a management report with regard to the second quarter ended June 30, 2024. Copies of the press release and management report are attached to this report as Exhibits 99.1 and 99.2, r…

Results of Operations and Financial Condition. ​ On May 9, 2024, PDF Solutions (the “ Company ”) issued a press release regarding its financial results and certain other information related to the first quarter ended March 31, 2024. The Company also posted on the Investors section of its website ( www.pdf.com ) a management report with regard to the first quarter ended March 31, 2024. Copies of the press release and management report are attached to this report as Exhibits 99.1 and 99.2, resp…