Business Highlights

Record total full year 2021 revenues of $111.1 million, up 26% year over year
Analytics revenue accounted for 84% of total 2021 full year revenues
Bookings for full year 2021 up more than 40% compared to full year 2020 bookings
Backlog of $179.5 million as of December 31, 2021, up 66% compared to backlog as of December 31, 2020
GAAP Gross Margin of 61% for the fourth quarter of 2021 and 60% for full year 2021
Non-GAAP Gross Margin of 65% for the fourth quarter of 2021 and 64% for full year 2021
Cash, cash equivalents, and short-term investments of $140.2 million as of December 31, 2021
Expect full year 2022 total revenues to grow greater than 20% on a year-over-year basis

SANTA CLARA, Calif., Feb. 15, 2022 (GLOBE NEWSWIRE) -- PDF Solutions, Inc. (NASDAQ:PDFS), a leading provider of comprehensive data solutions for the semiconductor ecosystem, today announced financial results for its fourth quarter and year ended December 31, 2021.

Highlights of Fourth Quarter and Full Year 2021 Financial Results

Total revenues for the fourth quarter of 2021 were $29.9 million, compared to $29.6 million for the third quarter of 2021 and $22.4 million for the fourth quarter of 2020. Analytics revenue for the fourth quarter of 2021 was $27.3 million, compared to $27.2 million for the third quarter of 2021 and $14.5 million for the fourth quarter of 2020. Integrated Yield Ramp revenue for the fourth quarter of 2021 was $2.6 million, compared to $2.4 million for third quarter of 2021 and $7.9 million for the fourth quarter of 2020. Total revenues for the full year 2021 and 2020 were $111.1 million and $88.0 million, respectively.

GAAP gross margin for the fourth quarter of 2021 was 61%, compared to 63% for the third quarter of 2021 and 56% for the fourth quarter of 2020. GAAP gross margin for the full year 2021 and 2020 was 60% and 58%, respectively.

Non-GAAP gross margin for the fourth quarter of 2021 was 65%, compared to 66% for the third quarter of 2021 and 61% for the fourth quarter of 2020. Non-GAAP gross margin for the full year 2021 and 2020 was 64% and 63%, respectively.

On a GAAP basis, net loss for the fourth quarter of 2021 was $7.0 million, or ($0.19) per basic and diluted share, compared to a net loss of $2.4 million, or ($0.06) per basic and diluted share, for the third quarter of 2021, and net loss of $33.4 million, or ($0.91) per basic and diluted share, for the fourth quarter of 2020. On a GAAP basis, net loss for the full year 2021 was $21.5 million, or ($0.58) per basic and diluted share, compared to net loss of $40.4 million, or ($1.17) per basic and diluted share, for the full year 2020.

Non-GAAP net income for the fourth quarter of 2021 was $2.8 million, or $0.07 per diluted share, compared to a non-GAAP net income of $2.4 million, or $0.06 per diluted share, for the third quarter of 2021, and non-GAAP net loss of $1.3 million, or ($0.03) per diluted share, for the fourth quarter of 2020. Non-GAAP net income for the full year 2021 was $3.0 million, or $0.08 per diluted share, compared to non-GAAP net loss of $0.8 million, or ($0.02) per diluted share, for the full year 2020.

Cash, cash equivalents and short-term investments at December 31, 2021 were $140.2 million, compared to $145.3 million at December 31, 2020, a decrease of $5.1 million. Cash provided by operating activities was $0.4 million for the fourth quarter of 2021. Cash provided by operating activities was $4.2 million for the full year 2021.

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. The call will be simultaneously webcast on PDF Solutions' website at http://ir.pdf.com/webcasts. A replay of the webcast will be available at the same website address beginning approximately two hours after completion of the live call. 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 Ended 2021 Financial Commentary Available Online

A Management Report reviewing the Company's fourth quarter and full year 2021 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 Generally Accepted Accounting Principles in the United States of America (GAAP), PDF Solutions also provides certain non-GAAP financial measures. Non-GAAP gross margin excludes stock-based compensation expense and the amortization of acquired technology. Non-GAAP net income (loss) excludes the effects of certain non-recurring items, expenses related to an arbitration proceeding for a disputed contract with a customer, write-down in value of property and equipment, acquisition-related costs, stock-based compensation expense, amortization of acquired technology and other acquired intangible assets, and their related income tax effects, as applicable, as well as adjustments for the non-cash portion of income taxes, tax impact of the CARES Act and valuation allowance for deferred tax assets. 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 has a current effect on the future uses of cash (with the exception of expenses related to an arbitration proceeding for a disputed contract with a customer and acquisition-related 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 financial statements presented below.

Forward-Looking Statements

The press release and the planned conference call include forward-looking statements regarding the Company's future expected business performance and financial results, including expectations total revenues, that are subject to future events and circumstances. 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: continued 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; the impact of inflation; the provision of technology and services prior to the execution of a final contract; the continuing impact of the coronavirus (COVID-19) on the semiconductor industry and on the Company's operations or supply and demand for the Company's products; the time required of the Company's executive management for, and the expenses related to, as well as the success of the Company's strategic growth opportunities and partnerships, including its partnership with Advantest Corporation; our ability to successfully integrate the acquired businesses and technologies; whether we can successfully convert our backlog into revenue; customers' production volumes under contracts that provide Gainshare royalties; and other risks set forth in PDF Solutions' periodic public filings with the Securities and Exchange Commission, including, without limitation, its Annual Reports on Form 10-K, most recently filed for the year ended December 31, 2020, Quarterly Reports on Form 10-Q, and Current Reports on Form 8-K and amendments to such reports. The forward-looking statements made in 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 has not filed its Form 10-K for the year ended December 31, 2021. 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 we file our Form 10-K.

About PDF Solutions

PDF Solutions (NASDAQ:PDFS) provides comprehensive data solutions designed to empower organizations across the semiconductor ecosystem 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 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 http://www.pdf.com/.

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

PDF SOLUTIONS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)

(In thousands)

	December 31,
	2021			2020

ASSETS
Current assets:
Cash and cash equivalents	$	27,684		$	30,315
Short-term investments		112,542			114,981
Accounts receivable, net		40,087			34,140
Prepaid expenses and other current assets		8,194			13,944
Total current assets		188,507			193,380
Property and equipment, net		35,295			39,242
Operating lease right-of-use assets, net		5,408			6,672
Goodwill		14,123			15,774
Intangible assets, net		21,239			24,573
Deferred tax assets, net		75			249
Other non-current assets		9,121			7,690
Total assets	$	273,768		$	287,580

LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable	$	5,554		$	4,399
Accrued compensation and related benefits		9,495			8,339
Accrued and other current liabilities		3,328			6,309
Operating lease liabilities ‒ current portion		1,758			1,926
Deferred revenues ‒ current portion		23,691			19,895
Billings in excess of recognized revenues		—			1,337
Total current liabilities		43,826			42,205
Long-term income taxes payable		2,656			2,956
Non-current operating lease liabilities		5,258			6,516
Other non-current liabilities		2,443			1,397
Total liabilities		54,183			53,074

Stockholders' equity:
Common stock and additional paid-in-capital		423,075			407,179
Treasury stock at cost		(104,705	)		(96,215	)
Accumulated deficit		(97,721	)		(76,233	)
Accumulated other comprehensive loss		(1,064	)		(225	)
Total stockholders' equity		219,585			234,506
Total liabilities and stockholders' equity	$	273,768		$	287,580

PDF SOLUTIONS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

(In thousands, except per share amounts)

	Three months ended									Year ended
	December 31,			September 30,			December 31,			December 31,			December 31,
	2021			2021			2020			2021			2020

Revenues:
Analytics (1)	$	27,250		$	27,194		$	14,466		$	93,415		$	57,232
Integrated yield ramp		2,636			2,361			7,901			17,645			30,814
Total revenues		29,886			29,555			22,367			111,060			88,046

Costs and Expenses:
Costs of revenues		11,675			11,070			9,839			44,193			36,765
Research and development		11,218			10,657			9,981			43,780			34,654
Selling, general and administrative		9,167			9,609			8,625			37,649			32,677
Amortization of other acquired intangible assets		313			314			220			1,255			741
Write-down in value of property and equipment		3,183			—			—			3,183			—
Interest and other expense (income), net		(292	)		(194	)		738			(683	)		1,269
Loss before income taxes		(5,378	)		(1,901	)		(7,036	)		(18,317	)		(18,060	)
Income tax expense		1,622			506			26,413			3,171			22,303
Net loss	$	(7,000	)	$	(2,407	)	$	(33,449	)	$	(21,488	)	$	(40,363	)

Net loss per share, basic and diluted	$	(0.19	)	$	(0.06	)	$	(0.91	)	$	(0.58	)	$	(1.17	)

Weighted average common shares used to calculate net loss per share, basic and diluted		37,348			37,221			36,727			37,138			34,458

(1) Analytics revenue includes revenue from Cimetrix Incorporated, a wholly owned subsidiary acquired by the Company in December 2020.

PDF SOLUTIONS, INC.

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

(In thousands)

	Three months ended									Year ended
	December 31,			September 30,			December 31,			December 31,			December 31,
	2021			2021			2020			2021			2020
				September 30,
GAAP
Total revenues	$	29,886		$	29,555		$	22,367		$	111,060		$	88,046
Costs of revenues		11,675			11,070			9,839			44,193			36,765
GAAP gross profit	$	18,211		$	18,485		$	12,528		$	66,867		$	51,281
GAAP gross margin		61	%		63	%		56	%		60	%		58	%

Non-GAAP
GAAP gross profit	$	18,211		$	18,485		$	12,528		$	66,867		$	51,281
Adjustments to reconcile GAAP to non-GAAP gross margin:
Stock-based compensation expense		703			670			872			2,563			3,454
Amortization of acquired technology		554			454			274			2,079			705
Non-GAAP gross profit	$	19,468		$	19,609		$	13,674		$	71,509		$	55,440
Non-GAAP gross margin		65	%		66	%		61	%		64	%		63	%

PDF SOLUTIONS, INC.

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

(In thousands, except per share amounts)

	Three months ended									Year ended
	December 31,			September 30,			December 31,			December 31,			December 31,
	2021			2021			2020			2021			2020

GAAP net loss	$	(7,000	)	$	(2,407	)	$	(33,449	)	$	(21,488	)	$	(40,363	)
Adjustments to reconcile GAAP net loss to non-GAAP net income (loss):
Stock-based compensation expense		3,457			3,363			2,987			12,931			12,463
Amortization of acquired technology		554			454			274			2,079			705
Amortization of other acquired intangible assets		313			314			220			1,255			741
Expenses of arbitration (1)		757			341			268			1,951			1,098
Write-down in value of property and equipment (2)		3,183			—			179			3,183			490
Acquisition-related costs (3)		—			—			752			—			752
Tax impact of reconciling items (4)		—			—			1,931			—			—
Tax impact of the CARES Act (5)		—			—			1,099			—			(1,162	)
Tax impact of valuation allowance for deferred tax assets (6)		1,539			334			24,471			3,091			24,471
Non-GAAP net income (loss)	$	2,803		$	2,399		$	(1,268	)	$	3,002		$	(805	)

GAAP net loss per diluted share	$	(0.19	)	$	(0.06	)	$	(0.91	)	$	(0.58	)	$	(1.17	)
Non-GAAP net income (loss) per diluted share	$	0.07		$	0.06		$	(0.03	)	$	0.08		$	(0.02	)

Shares used in net income (loss) per diluted share calculation		38,430			37,916			36,727			37,901			34,458

(1) Represents expenses related to an arbitration proceeding over a disputed customer contract, which expenses are expected to continue until the arbitration is resolved.

(2) Pertains to write-down in value of our first-generation of e-beam tools for Design-for-Inspection systems wherein carrying values may not be fully recoverable due to lack of market demand and future needs of our customers for these tools.

(3) Represents transaction expenses related to the acquisition of Cimetrix Incorporated in the fourth quarter of 2020.

(4) Tax impact of reconciling items for the fourth quarter of 2020 pertains to the reversal of prior quarters' tax impact due to a full valuation allowance recognized against the U.S. deferred tax assets (DTAs) on a GAAP basis in the fourth quarter of fiscal 2020. The above reconciling items do not have any tax expense or benefit on a GAAP basis for the years ended December 31, 2021 and 2020 due to the US federal net operating loss ("NOL") and full valuation allowance offsetting any tax impact (i.e., any increase or decrease in NOL or credits is offset by a corresponding valuation allowance from these items.

(5) The Company booked discrete tax benefit recognized from the carryback of NOLs under the Coronavirus Aid, Relief, and Economic Security Act (the "CARES Act") enacted in March 2020 in the amount of $2.3 million through the nine months ended September 30, 2020. Such tax benefit represents the refund of cash taxes in the amount of $1.2 million and release of previously utilized tax attributes of $1.1 million. Due to full valuation allowance placed against U.S. DTAs in the fourth quarter of 2020, there is no tax benefit from the released tax attributes. The Company does not have any NOLs on a non-GAAP basis and, therefore, it did not recognize any CARES Act benefit in calculating its non-GAAP tax expense and net income (loss).

(6) The Company's GAAP tax expense is higher year-to-date compared to the non-GAAP tax expense, primarily due to the GAAP full U.S. federal and state valuation allowances. For example, on a GAAP basis, the Company does not receive a deferred tax benefit for foreign tax credits or R&D credits after 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 for Non-GAAP income and management's conclusion that it will be able to more likely than not to utilize its net DTAs. Each reporting period, management evaluates the need for a valuation allowance and may place a valuation allowance against its U.S. net DTA 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 US DTAs on a non-GAAP basis.

Company Contacts:
Adnan Raza	Sonia Segovia	Joe Diaz, Robert Blum, Joe Dorame
Chief Financial Officer	Investor Relations	Lytham Partners, LLC
Tel: (408) 516-0237	Tel: (408) 938-6491	Tel: (602) 889-9700
Email: adnan.raza@pdf.com	Email: sonia.segovia@pdf.com	Email: pdfs@lythampartners.com

PDF Solutions® Reports Fourth Quarter and Full Year 2021 Results