Exhibit 99.1

2858 De La Cruz Boulevard, Santa Clara CA 95050 USA

+1.408.280.7900 www.pdf.com

News Release


Company Contacts:
Adnan Raza		Sonia Segovia
Chief Financial Officer		Investor Relations
Tel: (408) 516-0237		Tel: (408) 938-6491
Email: [email protected]		Email: [email protected]

PDF Solutions® Announces First Quarter 2025 Financial Results

Santa Clara, CA, May 8, 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 first quarter ended March 31, 2025.

Financial Highlights of First Quarter 2025

●

Quarterly total revenues of $47.8 million, up 16% over last year’s comparable quarter

●

Quarterly analytics revenue of $42.5 million, up 10% over last year’s comparable quarter

●

GAAP gross margin of 73% and non-GAAP gross margin of 77%

●

GAAP diluted loss per share of ($0.08) and non-GAAP diluted earnings per share of $0.21

●

Backlog of $226.7 million as of March 31, 2025

●

Completed acquisition of SecureWise LLC, a widely-used, secure, remote connectivity solution in the semiconductor manufacturing equipment industry, during the first quarter of 2025, financed using a combination of new bank debt of $70.0 million and cash on hand

Total revenues for the first quarter of 2025 were $47.8 million, compared to $50.1 million for the fourth quarter of 2024 and $41.3 million for the first quarter of 2024. Analytics revenue for the first quarter of 2025 was $42.5 million, compared to $47.9 million for the fourth quarter of 2024 and $38.5 million for the first quarter of 2024. Integrated Yield Ramp revenue for the first quarter of 2025 was $5.3 million, compared to $2.2 million for the fourth quarter of 2024 and $2.8 million for the first quarter of 2024.

GAAP gross margin for the first quarter of 2025 was 73%, compared to 68% for the fourth quarter of 2024 and 67% for the first quarter of 2024.

Non-GAAP gross margin for the first quarter of 2025 was 77%, compared to 72% for the fourth quarter of 2024 and 72% for the first quarter of 2024.

On a GAAP basis, net loss for the first quarter of 2025 was $3.0 million, or ($0.08) per diluted share, compared to net income of $0.5 million, or $0.01 per diluted share, for the fourth quarter of 2024, and net loss of $0.4 million, or ($0.01) per diluted share, for the first quarter of 2024.

Non-GAAP net income for the first quarter of 2025 was $8.1 million, or $0.21 per diluted share, compared to non-GAAP net income of $9.9 million, or $0.25 per diluted share, for the fourth quarter of 2024, and non-GAAP net income of $5.7 million, or $0.15 per diluted share, for the first quarter of 2024.

PDF Solutions® Reports First Quarter 2025 Financial Results

Financial Outlook

“The first quarter of 2025 saw strong customer activity and platform development, driven by AI-driven digitization. Sapience Manufacturing Hub saw record bookings, and we acquired secureWISE to enhance supply chain collaboration. Our platform - spanning analytics, AI/Model Ops, enterprise connectivity, and supply chain tools - empowers customers to handle today’s complex manufacturing and testing environments and data requirements. With a strong portfolio and momentum, we reaffirm our 21-23% annual revenue growth prior guidance range for this 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-conf.media-server.com/register/BI6d53831ac55c4a1ab7f4514ab0ec41ca. 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.

First Quarter 2025 Financial Commentary Available Online

A Management Report reviewing the Company’s first quarter 2025 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, amortization of debt issuance costs and the effects of certain non-recurring items, such as expenses for certain legal proceedings, non-recurring legal, finance, integration and other costs, loss on damaged equipment in-transit, 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, finance, integration and other costs) 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.

PDF Solutions® Reports First Quarter 2025 Financial Results

About PDF Solutions

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

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 impacting 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 and uncertainties discussed 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, 2024, Quarterly Reports on Form 10-Q, and Current Reports on Form 8-K and any amendments to such reports. All 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.

PDF Solutions® Reports First Quarter 2025 Financial Results

PDF SOLUTIONS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)

(In thousands)


	March 31,		December 31,
	2025		2024

ASSETS
Current assets:
Cash and cash equivalents	$	43,734	$	90,594
Short-term investments		10,415		24,291
Accounts receivable, net		63,676		73,649
Prepaid expenses and other current assets		22,800		17,445
Total current assets		140,625		205,979
Property and equipment, net		56,564		48,465
Operating lease right-of-use assets, net		3,661		4,029
Goodwill		96,645		14,953
Intangible assets, net		58,357		12,307
Deferred tax assets, net		215		43
Other non-current assets		33,905		29,513
Total assets	$	389,972	$	315,289

LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	9,394	$	8,255
Accrued compensation and related benefits		10,902		16,855
Accrued and other current liabilities		13,037		8,752
Operating lease liabilities ‒ current portion		1,591		1,675
Deferred revenues ‒ current portion		27,131		25,005
Current portion of long-term debt, net		2,240		—
Total current liabilities		64,295		60,542
Long-term income taxes		2,932		2,915
Non-current operating lease liabilities		3,154		3,504
Long-term debt, net		66,416		—
Other non-current liabilities		4,195		2,291
Total liabilities		140,992		69,252

Stockholders’ equity:
Common stock and additional paid-in capital		511,751		502,908
Treasury stock, at cost		(162,672)		(159,352)
Accumulated deficit		(97,020)		(93,988)
Accumulated other comprehensive loss		(3,079)		(3,531)
Total stockholders’ equity		248,980		246,037
Total liabilities and stockholders’ equity	$	389,972	$	315,289

PDF Solutions® Reports First Quarter 2025 Financial Results

PDF SOLUTIONS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

(In thousands, except per share amounts)


	Three months ended
	March 31,		December 31,		March 31,
	2025 (1)		2024		2024

Revenues:
Analytics	$	42,471	$	47,926	$	38,463
Integrated yield ramp		5,307		2,159		2,847
Total revenues		47,778		50,085		41,310

Costs and Expenses:
Costs of revenues		12,955		15,901		13,529
Research and development		14,628		14,417		12,984
Selling, general, and administrative		23,372		19,073		16,498
Amortization of acquired intangible assets		378		182		259
Income (loss) from operations		(3,555)		512		(1,960)
Interest expense		(311)		—		—
Other income (expense), net		870		962		1,692
Income before income tax expense		(2,996)		1,474		(268)
Income tax expense		(36)		(935)		(125)
Net income (loss)	$	(3,032)	$	539	$	(393)

Net income (loss) per share:
Basic	$	(0.08)	$	0.01	$	(0.01)
Diluted	$	(0.08)	$	0.01	$	(0.01)

Weighted average common shares used to calculate net income (loss) per share:
Basic		39,088		38,783		38,500
Diluted		39,088		39,104		38,500

(1)	Analytics Revenue includes revenue from SecureWise LLC, a wholly owned subsidiary we acquired in March 2025.

PDF Solutions® Reports First Quarter 2025 Financial Results

PDF SOLUTIONS, INC.

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

(In thousands)


	Three months ended
	March 31,			December 31,			March 31,
	2025			2024			2024

GAAP
Total revenues	$	47,778		$	50,085		$	41,310
Costs of revenues		12,955			15,901			13,529
GAAP gross profit	$	34,823		$	34,184		$	27,781
GAAP gross margin		73	%		68	%		67	%

Non-GAAP
GAAP gross profit	$	34,823		$	34,184		$	27,781
Adjustments to reconcile GAAP to non-GAAP gross margin:
Stock-based compensation expense		1,342			1,336			1,200
Amortization of acquired technology		678			583			584
Non-GAAP gross profit	$	36,843		$	36,103		$	29,565
Non-GAAP gross margin		77	%		72	%		72	%

PDF Solutions® Reports First Quarter 2025 Financial Results

PDF SOLUTIONS, INC.

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

(In thousands, except per share amounts)


	Three months ended
	March 31,		December 31,		March 31,
	2025		2024		2024

GAAP net income (loss)	$	(3,032)	$	539	$	(393)
Adjustments to reconcile GAAP net income (loss) to non-GAAP net income:
Stock-based compensation expense		6,596		6,507		6,110
Amortization of acquired technology under costs of revenues		678		583		584
Amortization of other acquired intangible assets		378		182		259
Expenses for certain legal proceedings (1)		115		69		—
Non-recurring legal, finance, integration and other costs		4,345		940		—
Loss on damaged equipment in-transit		—		663		—
Amortization of debt issuance costs		5		—		—
Tax impact of valuation allowance for deferred tax assets and reconciling items (2)		(970)		375		(813)
Non-GAAP net income	$	8,115	$	9,858	$	5,747

GAAP net income (loss) per diluted share	$	(0.08)	$	0.01	$	(0.01)
Non-GAAP net income per diluted share	$	0.21	$	0.25	$	0.15

Weighted average common shares used in GAAP net income (loss) per diluted share calculation		39,088		39,104		38,500
Weighted average common shares used in non-GAAP net income per diluted share calculation		39,285		39,104		39,053

(1)	Represents legal costs and expenses related to certain litigation and an arbitration proceeding, which are expected to continue until these matters are resolved.

(2)

The difference between the GAAP and non-GAAP income tax provisions is primarily due to the valuation allowance on a GAAP basis and non-GAAP adjustments. For example, on a GAAP basis, the Company does not receive a deferred tax benefit for foreign tax credits or research and development credits after the valuation allowance. The Company’s non-GAAP tax rate and resulting non-GAAP tax expense is not calculated with a full U.S. federal or state valuation allowance due to the Company’s cumulative non-GAAP income and management’s conclusion that it is more likely than not to utilize its net deferred tax assets (DTAs). Each reporting period, management evaluates the need for a valuation allowance and may place a valuation allowance against its U.S. net DTAs on a non-GAAP basis if it concludes it is more likely than not that it will not be able to utilize some or all of its U.S. DTAs on a non-GAAP basis.