Exhibit 99.1

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2858 De La Cruz Boulevard, Santa Clara CA 95050 USA

+1.408.280.7900                                             www.pdf.com

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News Release

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PDF Solutions® Announces Record 2024 Fourth Quarter and

Full Year Total Revenues

Santa Clara, CA, February 13, 2025, – PDF Solutions, Inc. (Nasdaq: PDFS), a leading provider of comprehensive data solutions for the semiconductor and electronics ecosystem, today announced financial results for its fourth quarter and year ended December 31, 2024.

Financial Highlights of Fourth Quarter 2024

Financial Highlights of Full Year 2024

Total revenues for the fourth quarter of 2024 were $50.1 million, compared to $46.4 million for the third quarter of 2024 and $41.1 million for the fourth quarter of 2023. Analytics revenue for the fourth quarter of 2024 was $47.9 million, compared to $44.8 million for the third quarter of 2024 and $39.1 million for the fourth quarter of 2023. Integrated Yield Ramp revenue for the fourth quarter of 2024 was $2.2 million, compared to $1.7 million for the third quarter of 2024 and $2.0 million for the fourth quarter of 2023. Total revenues for the full year 2024 and 2023 were $179.5 million and $165.8 million, respectively.

GAAP gross margin for the fourth quarter of 2024 was 68%, compared to 73% for the third quarter of 2024 and 68% for the fourth quarter of 2023. GAAP gross margin for the full year 2024 and 2023 was 70% and 69%, respectively.

Non-GAAP gross margin for the fourth quarter of 2024 was 72%, compared to 77% for the third quarter of 2024 and 72% for the fourth quarter of 2023. Non-GAAP gross margin for the full year 2024 and 2023 was 74% and 73%, respectively.

On a GAAP basis, net income for the fourth quarter of 2024 was $0.5 million, or $0.01 per diluted share, compared to net income of $2.2 million, or $0.06 per diluted share, for the third quarter of 2024, and net income of $0.9 million, or $0.02 per diluted share, for the fourth quarter of 2023. On a GAAP basis, net income for the full year 2024 was $4.1 million, or $0.10 per diluted share, compared to net income of $3.1 million, or $0.08 per diluted share, for the full year 2023.

Non-GAAP net income for the fourth quarter of 2024 was $9.9 million, or $0.25 per diluted share, compared to non-GAAP net income of $9.9 million, or $0.25 per diluted share, for the third quarter of 2024, and non-GAAP net income of $5.7 million, or $0.15 per diluted share, for the fourth quarter of 2023. Non-GAAP net income for the full year 2024 was $32.6 million, or $0.84 per diluted share, compared to non-GAAP net income of $28.5 million, or $0.73 per diluted share, for the full year 2023.

Cash, cash equivalents and short-term investments as of December 31, 2024, were $114.9 million.

PDF Solutions® Reports Fourth Quarter and Full Year 2024 Results

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Financial Outlook

“We are pleased with the progress we are making with our customers. During the fourth quarter of 2024, we completed an ongoing manufacturing evaluation of an eProbe machine earlier than the customer’s schedule, resulting in the sale to this new leading edge customer, booked multiple Exensio deals, and saw growth in our Cimetrix connectivity business from runtime licenses.  In 2025, we expect our full year revenues to grow at a rate approaching 15% year over year,” said John Kibarian, CEO and President.

Conference Call

As previously announced, PDF Solutions will discuss these results on a live conference call beginning at 2:00 p.m. Pacific Time / 5:00 p.m. Eastern Time today. To participate on the live call, analysts and investors should pre-register at: https://register.vevent.com/register/BI1b05df01d9534a648d4fd2cd753be31c. Registrants will receive dial-in information and a unique passcode to access the call. We encourage participants to dial into the call ten minutes ahead of the scheduled time. The teleconference will also be webcast simultaneously on the Company’s website at https://ir.pdf.com/webcasts. A replay of the conference call webcast will be available after the call on the Company’s investor relations website. A copy of this press release, including the disclosure and reconciliation of certain non-GAAP financial measures to the comparable GAAP measures, which non-GAAP measures may be used periodically by PDF Solutions’ management when discussing financial results with investors and analysts, will also be available on PDF Solutions’ website at http://www.pdf.com/press-releases following the date of this release.

Fourth Quarter and Full Year 2024 Financial Commentary Available Online

A Management Report reviewing the Company’s fourth quarter and full year 2024 financial results will be furnished to the Securities and Exchange Commission on Form 8-K and published on the Company’s website at http://ir.pdf.com/financial-reports. Analysts and investors are encouraged to review this commentary prior to participating in the conference call.

Information Regarding Use of Non-GAAP Financial Measures

In addition to providing results that are determined in accordance with accounting principles generally accepted in the United States of America (“GAAP”), PDF Solutions also provides certain non-GAAP financial measures. Non-GAAP gross profit and margin exclude stock-based compensation expense and the amortization of acquired technology under costs of revenues. Non-GAAP net income excludes stock-based compensation expense, amortization of acquired technology under costs of revenues, amortization of other acquired intangible assets, and the effects of certain non-recurring items, such as expenses for certain legal proceedings, non-recurring legal, tax and accounting service-related costs, loss on damaged equipment in-transit, net of recovery from previously written-off property and equipment, and their related income tax effects, as applicable, as well as adjustments for the valuation allowance for deferred tax assets and reconciling items. These non-GAAP financial measures are used by management internally to measure the Company’s profitability and performance. PDF Solutions’ management believes that these non-GAAP measures provide useful supplemental information to investors regarding the Company’s ongoing operations in light of the fact that none of these categories of expense and income has a current effect on the future uses of cash (with the exception of expenses related to certain legal proceedings and non-recurring legal, tax and accounting services) nor do they impact the generation of current or future revenues. These non-GAAP results should not be considered an alternative to, or a substitute for, GAAP financial information, and may differ from similarly titled non-GAAP measures used by other companies. In particular, these non-GAAP financial measures are not a substitute for GAAP measures of income or loss as a measure of performance, or to cash flows from operating, investing and financing activities as a measure of liquidity. Since management uses these non-GAAP financial measures internally to measure profitability and performance, PDF Solutions has included these non-GAAP measures to give investors an opportunity to see the Company’s financial results as viewed by management. A reconciliation of the comparable GAAP financial measures to the non-GAAP financial measures is provided at the end of the Company’s condensed consolidated financial statements presented below.

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PDF Solutions® Reports Fourth Quarter and Full Year 2024 Results

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Forward-Looking Statements

This press release and the planned conference call include forward-looking statements regarding the Company’s future expected business performance and financial results, including expectations about total revenue growth for 2025 and other statements identified by words such as “could,” “expects,” “intends,” “may,” “plans,” “potential,” “should,” “will,” “would,” or similar expressions and the negatives of those terms, that are subject to future events and circumstances. Other than statements of historical fact, all statements contained in this press release and the planned conference call are forward-looking statements within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995. Actual results could differ materially from those expressed in these forward-looking statements. Risks and uncertainties that could cause results to differ materially include risks associated with: the effectiveness of the Company’s business and technology strategies; current semiconductor industry trends and competition; rates of  adoption of the Company’s solutions by new and existing customers; project milestones or delays and performance criteria achieved; cost and schedule of new product development and investments in research and development; the continuing impact of macroeconomic conditions, including inflation, changing interest rates and tariffs, the evolving trade regulatory environment and geopolitical tensions, and other trends on the semiconductor industry, the Company’s customers, operations, and supply and demand for its products; supply chain disruptions; the success of the Company’s strategic growth opportunities and partnerships; recent and future acquisitions, strategic alliances and relationships and the Company’s ability to successfully integrate acquired businesses and technologies; whether the Company can successfully convert backlog into revenue; customers’ production volumes under contracts that provide Gainshare; the sufficiency of the Company’s cash resources and anticipated funds from operations; the Company’s ability to obtain additional financing if needed and its ability to use support and updates for certain open-source software; and other risks set forth in PDF Solutions’ periodic public filings with the Securities and Exchange Commission, including, without limitation, its Annual Report on Form 10-K for the year ended December 31, 2023, Quarterly Reports on Form 10-Q, and Current Reports on Form 8-K and amendments to such reports. The forward-looking statements made in this press release and the conference call are made as of the date hereof, and PDF Solutions does not assume any obligation to update such statements nor the reasons why actual results could differ materially from those projected in such statements. The Company has not filed its Annual Report on Form 10-K for the year ended December 31, 2024. As a result, all financial results described in this earnings release should be considered preliminary, and are subject to change to reflect any necessary adjustments or changes in accounting estimates, that are identified prior to the time the Company files its Annual Report on Form 10-K.

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About PDF Solutions

PDF Solutions (Nasdaq: PDFS) provides comprehensive data solutions designed to empower organizations across the semiconductor and electronics industry ecosystem to improve manufacturing yield, product quality and operational efficiency leading to increased profitability. The Company’s products and services are used by Fortune 500 companies across the semiconductor and electronics ecosystem to achieve smart manufacturing goals by connecting and controlling manufacturing equipment, collecting data generated during manufacturing and test operations, and using advanced analytics and machine learning models to enable profitable, high-volume manufacturing.

Founded in 1991, PDF Solutions is headquartered in Santa Clara, California, with operations across North America, Europe, and Asia. The Company (directly or through one or more subsidiaries) is an active member of SEMI, INEMI, TPCA, IPC, the OPC Foundation, and DMDII. For the latest news and information about PDF Solutions or to find office locations, visit https://www.pdf.com.

PDF Solutions and the PDF Solutions logo are trademarks or registered trademarks of PDF Solutions, Inc. or its subsidiaries.

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PDF Solutions® Reports Fourth Quarter and Full Year 2024 Results

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PDF SOLUTIONS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)

(In thousands)

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PDF Solutions® Reports Fourth Quarter and Full Year 2024 Results

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PDF SOLUTIONS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

(In thousands, except per share amounts)

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PDF Solutions® Reports Fourth Quarter and Full Year 2024 Results

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PDF SOLUTIONS, INC.

RECONCILIATION OF GAAP GROSS MARGIN TO NON-GAAP GROSS MARGIN (UNAUDITED)

(In thousands)

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PDF Solutions® Reports Fourth Quarter and Full Year 2024 Results

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PDF SOLUTIONS, INC.

RECONCILIATION OF GAAP NET INCOME (LOSS) TO NON-GAAP NET INCOME (UNAUDITED)

(In thousands, except per share amounts)

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