10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 30, 2012

or

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from            to            

Commission file number 000-50646

Ultra Clean Holdings, Inc.

(Exact name of registrant as specified in its charter)

Delaware	61-1430858
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
26462 Corporate Avenue, Hayward, California	94545
(Address of principal executive offices)	(Zip Code)

(510) 576-4400

Registrant’s telephone number, including area code

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	¨	Accelerated filer	x
Non-accelerated filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

Number of shares outstanding of the issuer’s common stock as of April 30, 2012: 23,285,290

ULTRA CLEAN HOLDINGS, INC.

TABLE OF CONTENTS

	PART I. FINANCIAL INFORMATION
ITEM 1.	FINANCIAL STATEMENTS	3
ITEM 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	14
ITEM 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	18
ITEM 4.	CONTROLS AND PROCEDURES	18
	PART II. OTHER INFORMATION
ITEM 1.	LEGAL PROCEEDINGS	19
ITEM 1A.	RISK FACTORS	19
ITEM 2.	UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS	26
ITEM 3.	DEFAULTS UPON SENIOR SECURITIES	26
ITEM 4.	MINE SAFETY DISCLOSURES	26
ITEM 5.	OTHER INFORMATION	26
ITEM 6.	EXHIBITS	27
SIGNATURES		28

2

PART I. FINANCIAL INFORMATION

ITEM 1. Financial Statements

ULTRA CLEAN HOLDINGS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited; in thousands, except share amounts)

	March 30, 2012			December 30, 2011
ASSETS
Current assets:
Cash and cash equivalents	$	54,770		$	52,155
Accounts receivable, net of allowance of $5 and $5, respectively		48,974			41,051
Inventory		60,998			55,473
Prepaid expenses and other		4,767			5,441
Total current assets		169,509			154,120
Equipment and leasehold improvements, net		9,518			10,009
Purchased intangibles, net		8,987			8,987
Other non-current assets		5,186			5,183
Total assets	$	193,200		$	178,299
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Bank borrowings	$	2,708		$	2,931
Accounts payable		39,050			29,451
Accrued compensation and related benefits		2,968			2,803
Deferred rent, current portion		926			895
Other current liabilities		1,324			662
Total current liabilities		46,976			36,742
Long-term debt		21,115			21,802
Deferred rent and other liabilities		2,244			2,470
Total liabilities		70,335			61,014
Commitments and contingencies (See note 6)
Stockholders’ equity:
Preferred stock — $0.001 par value, 10,000,000 authorized; none outstanding		—			—
Common stock — $0.001 par value, 90,000,000 authorized; 23,270,712 and 22,910,649 shares issued and outstanding, in 2012 and 2011, respectively		109,932			108,838
Common shares held in treasury, at cost, 601,944 shares in 2012 and 2011		(3,337	)		(3,337	)
Accumulated other comprehensive loss		(174	)		—
Retained earnings		16,444			11,784
Total stockholders’ equity		122,865			117,285
Total liabilities and stockholders’ equity	$	193,200		$	178,299

(See accompanying notes to condensed consolidated financial statements)

3

ULTRA CLEAN HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited; in thousands, except per share data)

	Three months ended
	March 30, 2012			April 1, 2011
Sales	$	110,565		$	126,719
Cost of goods sold		94,905			109,167
Gross profit		15,660			17,552
Operating expenses:
Research and development		1,406			1,605
Sales and marketing		1,744			2,057
General and administrative		6,243			5,703
Total operating expenses		9,393			9,365
Income from operations		6,267			8,187
Interest and other income (expense), net		(105	)		(368	)
Income before provision for income taxes		6,162			7,819
Income tax provision		1,502			1,999
Net income	$	4,660		$	5,820
Net income per share:
Basic	$	0.20		$	0.26
Diluted	$	0.20		$	0.25
Shares used in computing net income per share:
Basic		23,013			22,468
Diluted		23,688			23,516

(See accompanying notes to condensed consolidated financial statements)

4

ULTRA CLEAN HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited; in thousands)

	Three months ended
	March 30, 2012			April 1, 2011
Cash flows from operating activities:
Net income	$	4,660		$	5,820
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization		705			639
Excess tax benefit from stock-based compensation		—			(601	)
Stock-based compensation		1,252			1,002
Changes in assets and liabilities:
Accounts receivable, net of allowance		(7,923	)		(3,413	)
Inventory		(5,525	)		(5,864	)
Prepaid expenses and other		674			(398	)
Other non-current assets		(3	)		(21	)
Accounts payable		9,425			2,782
Accrued compensation and related benefits		165			181
Other liabilities		469			1,753
Net cash provided by operating activities		3,899			1,880
Cash flows from investing activities:
Purchases of equipment and leasehold improvements		(214	)		(1,154	)
Net cash used in investing activities		(214	)		(1,154	)
Cash flows from financing activities:
Proceeds from revolving credit facility		19,482			—
Principal payments on revolving credit facility, term debt and capital lease obligations		(20,394	)		(1,353	)
Excess tax benefit from stock-based compensation		—			601
Employees’ taxes paid upon vesting of restricted stock units		(251	)		—
Proceeds from issuance of common stock		93			655
Net cash used in financing activities		(1,070	)		(97	)
Net increase in cash		2,615			629
Cash and cash equivalents at beginning of period		52,155			34,654
Cash and cash equivalents at end of period	$	54,770		$	35,283
Supplemental items:
Cash paid (refunds) during the period for:
Income taxes paid	$	94		$	350
Income tax refunds	$	—		$	(613	)
Interest	$	130		$	335
Non-cash investing and financing activities:
Restricted stock issued	$	2,439		$	2,241
Fixed asset purchases included in accounts payable	$	20		$	25

(See accompanying notes to condensed consolidated financial statements)

5

ULTRA CLEAN HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Organization, Basis of Presentation and Significant Accounting Policies

Organization — Ultra Clean Holdings, Inc. (the “Company”) is a leading developer and supplier of critical subsystems, primarily for the semiconductor capital equipment industry. The Company also leverages the specialized skill sets required to support semiconductor capital equipment to serve the technologically similar markets in the flat panel, medical, energy and research industries, collectively referred to as “Other Addressed Industries”. The Company develops, designs, prototypes, engineers, manufactures and tests subsystems which are highly specialized and tailored to specific steps in the semiconductor manufacturing process as well as the manufacturing processes in Other Addressed Industries. Revenue is derived from the sale of gas delivery systems and other critical subsystems including chemical mechanical planarization (CMP) subsystems, chemical delivery modules, top-plate assemblies, frame assemblies, process modules and other high level assemblies.

The Company’s customers are primarily original equipment manufacturers (OEMs) in industries it supports, providing customers complete subsystem solutions that combine the Company’s expertise in design, test, component characterization and highly flexible manufacturing operations with quality control and financial stability. This combination helps the Company to drive down total manufacturing costs, reduce design-to-delivery cycle times and maintain high quality standards for our customers. The Company believes these characteristics, as well as the Company’s standing as a leading supplier of gas delivery systems and other critical subsystems, place the Company in a strong position to benefit from the demand for subsystem outsourcing.

Basis of Presentation — The unaudited condensed consolidated financial statements included in this quarterly report on Form 10-Q include the accounts of the Company and its wholly-owned subsidiaries and have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”). This financial information reflects all adjustments which are, in the opinion of the Company, normal, recurring and necessary to present fairly the statements of financial position, results of operations and cash flows for the dates and periods presented. The Company’s December 30, 2011, balance sheet data was derived from audited financial statements as of that date.

The unaudited condensed consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements for the fiscal year ended December 30, 2011, included in its Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 21, 2012. The Company’s results of operations for the three months ended March 30, 2012, are not necessarily indicative of the results to be expected for any future periods.

Principles of Consolidation — The Company’s consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries and all intercompany accounts and transactions have been eliminated in consolidation.

Foreign Currency Translation — The Company has reviewed its non-U.S. subsidiaries (of which substantially all of its non-U.S. asset base resides in China) that operate in a local currency environment to determine their functional currency by examining how and in what currency each subsidiary generates cash through billings and cash receipts and how and in what currency the subsidiary expends cash through payment of its vendors and payment of its workforce. Also, these subsidiaries individual assets and liabilities that are primarily denominated in the local foreign currency are examined for their impact on the Company’s cash flows. All have been determined to have the U.S. dollar as its functional currency All balance sheet accounts of these local functional currency subsidiaries are translated at the fiscal period-end exchange rate, and income and expense accounts are translated using average rates in effect for the period, except for costs related to those balance sheet items that are translated using historical exchange rates. The resulting translation adjustments are recorded as cumulative translation adjustments, and are a component of accumulated other comprehensive income (loss). Foreign currency transaction gains and losses are recorded in other income (expense), net.

Use of Accounting Estimates — The presentation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosures of contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates and judgments on historical experience and on various other assumptions that it believes are reasonable under the circumstances. However, future events are subject to change and the best estimates and judgments routinely require adjustment. Actual amounts may differ from those estimates.

Certain Significant Risks and Uncertainties — The Company operates in a dynamic industry and, accordingly, can be affected by a variety of factors. For example, any of the following areas could have a negative effect on the Company in terms of its future financial position, results of operations or cash flows: the general state of the U.S. and world economies, the highly cyclical nature of the industries the Company serves; the loss of any of a small number of customers; ability to obtain additional financing; pursuing acquisition opportunities; regulatory changes; fundamental changes in the technology underlying semiconductor, flat panel, solar and medical device manufacturing processes or manufacturing equipment; the hiring, training and retention of key employees; successful and timely completion of product design efforts; and new product design introductions by competitors.

Concentration of Credit Risk — Financial instruments which subject the Company to concentrations of credit risk consist principally of cash and cash equivalents and accounts receivable. The Company sells its products primarily to semiconductor capital equipment manufacturers in the United States. The Company performs credit evaluations of its customers’ financial condition and generally requires no collateral.

6

ULTRA CLEAN HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

Significant sales to customers — The Company had significant sales to two customers- Applied Materials, Inc. and Lam Research Corporation , each of which accounted for 10% or more of sales for the three months ended March 30, 2012 and April 1, 2011. Sales to each of these customers as a percentage of total sales were as follows:

	Three months ended
	March 30, 2012			April 1, 2011
Applied Materials, Inc. (1)		43.0	%		38.5	%
Lam Research Corporation (2)		32.1	%		30.6	%
Total		75.1	%		69.1	%

(1) In November 2011, Applied Materials Inc. completed the acquisition of Varian Semiconductor Equipment Associates, Inc., one of the Company’s customers. The sales percentages for Applied Materials, Inc. for the three months ended March 30, 2012 include sales to Varian Semiconductor Equipment Associates, Inc. The sales percentages for Applied Materials, Inc. for the quarter ended April 1, 2011 have been restated to reflect the inclusion of sales to Varian Semiconductor Equipment Associates, Inc., for comparison purposes.

(2) Lam Research Corp. has announced that it has entered into a definitive merger agreement to acquire Novellus Systems, Inc., one of the Company’s customers, in an all-stock transaction that is anticipated to close in the second quarter of 2012. The sales percentages for Lam Research Corp. do not include any sales to Novellus Systems, Inc.

These two customers’ accounts receivable balances were individually greater than 10% of accounts receivable and, in the aggregate, represented approximately 76% and 69% of accounts receivable as of March 30, 2012 and December 30, 2011, respectively.

Fair Value of Financial Instruments — The Company’s financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable and bank borrowings. The carrying value of these instruments approximates their fair value because of their short-term nature.

The accounting guidance for fair value measurements prioritizes the inputs used in measuring fair value in the following hierarchy:

Level 1 — Observable inputs, such as quoted prices in active markets,

Level 2 — inputs other than the quoted prices in active markets that are observable either directly or indirectly,

Level 3 — Unobservable inputs in which there is little or no market data, which requires the Company to develop its own assumptions.

The only financial asset or liability measured at fair value on a recurring basis is an overnight sweep account invested in money market funds with a carrying value and fair value of $34.0 million at March 30, 2012, which are valued based on Level 2 inputs.

Fiscal Year — The Company uses a 52-53 week fiscal year ending on the Friday nearest December 31. All references to quarters refer to fiscal quarters and all references to years refer to fiscal years.

Income Taxes — The Company utilizes the asset and liability method of accounting for income taxes, under which deferred taxes are determined based on the temporary differences between the financial statement and tax basis of assets and liabilities using tax rates expected to be in effect during the years in which the basis differences reverse. A valuation allowance is recorded when it is more likely than not that some of the deferred tax assets will not be realized.

Income tax positions must meet a more-likely-than-not recognition threshold to be recognized. Income tax positions that previously failed to meet the more-likely-than-not threshold are recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not threshold are derecognized in the first subsequent financial reporting period in which that threshold is no longer met. The Company recognizes potential accrued interest and penalties related to unrecognized tax benefits within the consolidated statements of income as income tax expense.

The determination of the Company’s tax provision is subject to judgments and estimates. The carrying value of the Company’s net deferred tax assets, which is made up primarily of tax deductions, assumes it will be able to generate sufficient future income to fully realize these deductions. In determining whether the realization of these deferred tax assets may be impaired, the Company makes judgments with respect to whether it is likely to generate sufficient future taxable income to realize these assets. The Company has a valuation allowance on the deferred tax assets of one of its China subsidiaries in the amount of $441,000.

The calculation of tax liabilities involves significant judgment in estimating the impact of uncertainties in the application of complex tax laws. Resolution of these uncertainties in a manner inconsistent with the Company’s expectations could have a material impact on its results of operations and financial position. Management believes that it has adequately provided for any adjustments that may result from these examinations, however, the outcome of tax audits cannot be predicted with certainty.

7

ULTRA CLEAN HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

Product Warranty — The Company provides a warranty on its products for a period of up to two years and provides for warranty costs at the time of sale based on historical activity. The determination of such provisions requires the Company to make estimates of product return rates and expected costs to repair or replace the products under warranty. If actual return rates and/or repair and replacement costs differ significantly from these estimates, adjustments to cost of sales may be required in future periods. Components of the reserve for warranty costs consisted of the following (in thousands):

	Three months ended
	March 30, 2012			April 1, 2011
Beginning balance	$	350		$	204
Additions related to sales		31			267
Warranty claims		(39	)		(212	)
Ending balance	$	342		$	259

Revenue Recognition — Product revenue is generally recorded upon shipment. In arrangements which specify title transfer upon delivery, revenue is not recognized until the product is delivered. The Company recognizes revenue when persuasive evidence of an arrangement exists, shipment has occurred, price is fixed or determinable and collectability is reasonably assured. If the Company has not substantially completed a product or fulfilled the terms of a sales agreement at the time of shipment, revenue recognition is deferred until fulfillment. The Company’s standard arrangement for its customers includes a signed purchase order or contract, no right of return of delivered products and no customer acceptance provisions.

The Company assesses collectability based on the credit worthiness of the customer and past transaction history. The Company performs on-going credit evaluations of customers and generally does not require collateral from customers.

Research and Development Costs — Research and development costs are expensed as incurred.

Net Income (loss) per Share — Basic net income (loss) per share is computed by dividing net income (loss) by the weighted average number of shares outstanding for the period. Diluted net income (loss) per share is calculated by dividing net income (loss) by the weighted average number of common shares outstanding and common equivalent shares from dilutive stock options and restricted stock using the treasury stock method, except when such shares are anti-dilutive (see Note 5 to Condensed Consolidated Financial Statements).

Comprehensive Income (Loss) — The Company reports by major components and as a single total, the change in its net assets during the period from non-owner sources. Comprehensive income (loss) for all periods presented was the same as net income (loss).

Segments — The Financial Accounting Standards Board’s (FASB) guidance regarding disclosure about segments in an enterprise and related information establishes standards for the reporting by public business enterprises of information about reportable segments, products and services, geographic areas, and major customers. The method for determining what information to report is based on the manner in which management organizes the reportable segments within the Company for making operational decisions and assessments of financial performance. The Company’s chief operating decision-maker is considered to be the Chief Executive Officer. The Company operates in one reporting segment.

Stock-Based Compensation Expense

The Company maintains stock-based compensation plans which allow for the issuance of equity-based awards to executives and certain employees. These equity-based awards include stock options, restricted stock awards and restricted stock units which can be either time-based or performance-based. The Company also maintains an employee stock purchase plan that provides for the issuance of shares to all eligible employees of the Company at a discounted price.

Stock-based compensation expense includes compensation costs related to estimated fair values of stock options and awards granted. The estimated fair value of the Company’s equity-based awards, net of expected forfeitures, is amortized over the awards’ vesting period on a straight-line basis over a weighted average period of four years for stock options three years for restricted stock awards and will be adjusted for subsequent changes in estimated forfeitures and future option grants.

The Company applies the fair value recognition provisions based on the FASB’s guidance regarding stock-based compensation. The exercise price of each stock option equals the market price of the Company’s stock on the date of grant. The estimated fair value of the Company’s equity-based awards, less expected forfeitures, is amortized over the awards’ vesting periods on a straight-line basis over a weighted average period of four years and will be adjusted for subsequent changes in estimated forfeitures and future option grants. Most options are scheduled to vest over four years and expire no later than ten years from the grant date. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model. The determination of the fair value of share-based payment awards on the date of grant using an option-pricing model is affected by the Company’s stock price as well as assumptions regarding a number of complex and subjective variables. These variables include the expected term of the awards; the Company’s expected stock price volatility over the term of the awards, actual and

8

ULTRA CLEAN HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

projected employee stock option exercise behaviors, risk-free interest rate and expected dividends. The Company estimates the expected term of share-based awards granted based on the Company’s historical option term experience. The Company estimates the volatility of its common stock based upon the Company’s historical stock price volatility over the length of the expected term of the options. The Company bases the risk-free interest rate that it uses in the option valuation model on U.S. Treasury zero-coupon issues with remaining maturities similar to the expected term of the options. The Company does not anticipate paying any cash dividends in the foreseeable future and therefore uses an expected dividend yield of zero in the option valuation model. The Company is required to estimate forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from those estimates. The Company uses historical data to estimate pre-vesting option forfeitures and records share-based compensation expense only for those awards that are expected to vest. The Company also considers, each quarter, whether there have been any significant changes in facts and circumstances that would affect its forfeiture rate.

Stock Options

The following table summarizes information with respect to options granted, exercised and canceled in the quarter ended March 30, 2012 and outstanding at March 30, 2012:

	Number of Shares
Options outstanding at December 30, 2011		1,654,691
Granted		—
Exercised		(64,343	)
Canceled		(4,513	)
Options outstanding at March 30, 2012		1,585,835

There were no options granted by the Company during either of the quarters ended March 30, 2012 or April 1, 2011.

The weighted-average exercise price, aggregate intrinsic value and weighted average remaining contractual life of outstanding options as of March 30, 2012 were $6.75 per share, $3.7 million and 4.7 years, respectively. As of March 30, 2012, 1,395,172 options with a weighted-average exercise price of $7.43 per share, aggregate intrinsic value of $2.6 million and a weighted average remaining contractual life of 4.4 years were exercisable. The total unamortized expense of the Company’s unvested options, net of forfeitures, as of March 30, 2012, was $0.2 million.

Employee Stock Purchase Plan

The Company also maintains an employee stock purchase plan (“ESPP”) that provides for the issuance of shares to all eligible employees of the Company at a discounted price. Under the ESPP, substantially all employees may purchase the Company’s common stock through payroll deductions at a price equal to 95 percent of the fair market value of the Company’s stock at the end of each applicable purchase period.

Restricted Stock Units and Restricted Stock Awards

The Company grants Restricted Stock Units (“RSU’s”) to employees and Restricted Stock Awards (“RSA”) to non-employee directors as part of the Company’s long term equity compensation plan.

Restricted Stock Units — RSU’s are granted to employees with a per share or unit purchase price of zero dollars and either have time based or performance based vesting. RSU’s typically vest over three years, subject to the employee’s continued service with the Company. For purposes of determining compensation expense related to these RSU’s, the fair value is determined based on the closing market price of the Company’s common stock on the date of award. The expected cost of the grant is reflected over the service period, and is reduced for estimated forfeitures. The Company granted 547,900 RSU’s (including 110,375 performance stock units) during the quarter ended March 30, 2012, with a weighted average fair value of $8.21 per share and 443,500 RSU’s (including 66,250 performance stock units) during the quarter ended April 1, 2011, with a weighted average fair value of $10.30 per share. During the quarter ended March 30, 2012, 29,668 vested shares were withheld for executive RSU tax payments, resulting in the net issuance of 50,916 shares. As of March 30, 2012, $8.6 million of stock-based compensation cost, net of forfeitures, related to RSU’s remains to be amortized, of which substantially all is expected to be recognized over an estimated period of less than three years. As of March 30, 2012, a total of 1,362,745 RSU’s remain outstanding with an aggregate intrinsic value of $10.3 million and a weighted average remaining contractual term of 1.6 years.

Restricted Stock Awards — During the second quarter ended July 1, 2011, the Company issued 30,000 shares of restricted stock awards to its non-employee directors. The total unamortized expense of the Company’s unvested restricted stock awards as of March 30, 2012, was less than $0.1 million.

9

ULTRA CLEAN HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

The following table summarizes the Company’s restricted stock unit and restricted stock award activity for the three months ended March 30, 2012 (in thousands):

	Number of Shares
Unvested restricted stock units and restricted stock awards at December 30, 2011		1,167
Granted		548
Vested		(296	)
Forfeited		(28	)
Unvested restricted stock units and restricted stock awards at March 30, 2012		1,391

The following table shows the Company’s stock-based compensation expense included in the condensed consolidated statements of operations (in thousands):

	Three months ended
	March 30, 2012			April 1, 2011
Cost of sales (1)	$	393		$	321
Research and development		79			79
Sales and marketing		94			121
General and administrative		686			481
		1,252			1,002
Income tax benefit		(305	)		(256	)
Total stock-based compensation expense	$	947		$	746

(1) As of March 30, 2012 and April 1, 2011, there were no stock-based compensation expenses capitalized in inventory.

Recently Issued Accounting Standards — In September 2011, the FASB issued authoritative guidance to allow entities to use a qualitative approach to test goodwill for impairment. This authoritative guidance permits an entity to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If it is concluded that this is the case, it is necessary to perform the two-step goodwill impairment test. Otherwise, the two-step goodwill impairment test is not required. This guidance is effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011 and earlier adoption is permitted. Currently, the implementation of this authoritative guidance would have no impact on the Company’s financial position or results of operations.

In June 2011, the FASB issued authoritative guidance on the presentation of comprehensive income to require an entity to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. This authoritative guidance eliminates the option to present the components of other comprehensive income as part of the statement of equity. In December 2011, the requirement regarding the presentation of reclassification adjustments out of accumulated other comprehensive income was deferred indefinitely. The new guidance, except for the provision deferred, is effective for the Company in the first quarter of fiscal 2012. The implementation of this authoritative guidance changed only the presentation of comprehensive income and had no impact on the Company’s financial position or results of operations.

In May 2011, the FASB issued authoritative guidance to provide a consistent definition of fair value and ensure that the fair value measurement and disclosure requirements are similar between U.S. GAAP and International Financial Reporting Standards. This authoritative guidance limits the highest-and-best-use measure to nonfinancial assets, permits certain financial assets and liabilities with offsetting positions in market or counterparty credit risks to be measured at a net basis, and provides guidance on the applicability of premiums and discounts. This authoritative guidance also expands the disclosures on Level 3 inputs by requiring quantitative disclosure of the unobservable inputs and assumptions, as well as description of the valuation processes and the sensitivity of the fair value to changes in unobservable inputs. The new guidance is effective for the Company in the first quarter of fiscal 2012. The implementation of this authoritative guidance did not have a material impact on the Company’s financial position or results of operations.

10

ULTRA CLEAN HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

2. Balance Sheet Information (in thousands)

Inventory consisted of the following:

	March 30, 2012			December 30, 2011
Raw materials	$	45,240		$	42,976
Work in process		11,897			12,953
Finished goods		8,118			3,486
		65,255			59,415
Reserve for excess and obsolete		(4,257	)		(3,942	)
Total	$	60,998		$	55,473

Equipment and leasehold improvements, net, consisted of the following:

	March 30, 2012			December 30, 2011
Computer equipment and software	$	7,120		$	7,089
Furniture and fixtures		1,595			1,761
Machinery and equipment		8,872			9,282
Leasehold improvements		10,857			10,860
		28,444			28,992
Accumulated depreciation and amortization		(18,926	)		(18,983	)
Total	$	9,518		$	10,009

3. Borrowing Arrangements

The Company has borrowing arrangements with its banking facility under its Loan and Security Agreement with Silicon Valley Bank (the “Loan Agreement”) which includes a $25.0 million revolving credit facility and one term loan. The aggregate amount of the revolving credit facility, which matures on December 31, 2013, is subject to a borrowing base equal to 80% of eligible accounts receivable and 45% of eligible inventory (total eligible inventory not to exceed $3.5 million) and is secured by substantially all of the Company’s assets. The revolving credit facility bears interest per annum at a variable rate equal to the greater of prime rate, as defined in the Loan Agreement, plus a margin of 25 basis points. The interest rate at March 30, 2012, on the revolving credit facility was 3.5%. The revolving credit facility contains certain reporting and financial covenants that must be met on a quarterly basis in order for the Company to remain in compliance. The Company was in compliance with all of its bank covenants as of March 30, 2012. The revolving credit facility balance as of March 30, 2012 was $19.5 million.

As of March 30, 2012, the Company had one term loan with its banking facility for $8.0 million, which matures on October 21, 2013. The term loan bears interest per annum at a variable rate equal to the greater of prime rate, as defined per the loan agreement, plus a margin of 75 basis points. During the first quarter ended and as of March 30, 2012, the interest rate on the outstanding term loan was 4.0%. The balance of the term loan as of March 30, 2012, was $4.3 million.

Total debt outstanding as of March 30, 2012, was $23.8 million.

11

ULTRA CLEAN HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

4. Income Tax

The Company’s income tax provision and related effective tax rate for the three month period ended March 30, 2012 was $1,502,000 and 24.4%, respectively. The Company’s income tax provision and related effective tax rate for the three month period ended April 1, 2011 was $1,999,000 and 25.6%, respectively. The change in respective rates reflects, primarily, changes in the geographic mix of worldwide earnings and financial results for the first quarter of 2012 compared to the same period in 2011.

The following table summarizes the activity related to the Company’s uncertain tax positions (in thousands):

	Three months ended
	March 30, 2012		April 1, 2011
Balance as of the beginning of period	$	132	$	39
Increases related to prior year tax positions		5		—
Balance as of the end of period	$	137	$	39

The determination of the Company’s tax provision is subject to judgments and estimates. The carrying value of the Company’s net deferred tax assets, which is made up primarily of tax deductions, assumes the Company will be able to generate sufficient future income to fully realize these deductions. In determining whether the realization of these deferred tax assets may be impaired, the Company makes judgments with respect to whether it is likely to generate sufficient future taxable income to realize these assets. In addition, the calculation of tax liabilities involves significant judgment in estimating the impact of uncertainties in the application of complex tax laws. Resolution of uncertainties in a manner inconsistent with the Company’s expectations could have a material impact on its results of operations and financial position.

As of March 30, 2012, the Company maintained a full valuation allowance on one of its China subsidiaries in the amount of $441,000 as the Company believes it is more likely than not that the deferred tax asset will not be realized. In order to reverse a valuation allowance, U.S. GAAP guidance requires the Company to review its cumulative twelve-quarter income/loss as well as its ability to generate sufficient future taxable income to realize the Company’s net deferred tax assets. During the quarter ended March 30, 2012, the Company conducted a review of this subsidiary, as well as its other worldwide subsidiaries, and determined that the valuation allowance on its consolidated deferred tax assets is adequate.

The Company files income tax returns in the U.S. federal jurisdiction, various states and foreign jurisdictions. The Company’s 2008 through 2011 federal income tax returns are open to audit through the statute of limitations by the Internal Revenue Service. The Company’s 2007 through 2011 state income tax returns are open to audit by the California Franchise Tax Board. The Company is also subject to examination in various other jurisdictions for various periods. The Company’s federal returns are still open for fiscal years 2004 through 2007 due to the carryback of losses for these years.

The Company is currently experiencing a tax holiday related to its Singapore subsidiary that will expire for tax years beginning January 2015. The Company’s Singapore subsidiary recorded a net profit for the quarter ended March 30, 2012.

Undistributed earnings of the Company’s foreign subsidiaries at March 30, 2012, are considered to be indefinitely reinvested and no provision for U.S. income taxes has been provided thereon. Upon distribution of those earnings in the form of dividends or otherwise, the Company would be subject to U.S. income taxes. It is not practicable to determine the income tax liability that might be incurred if these earnings were to be distributed.

Sales, use and value-added taxes receivable and payable are recorded on a net basis by jurisdiction. Subsequent to the issuance of the April 1, 2011 consolidated financial statements, management determined that certain of these receivables and payables had previously been recorded on a gross basis. Accordingly, the amounts previously reported as of April 1, 2011 and December 31, 2010, have been corrected to be reported on a net basis. Accrued liabilities were reduced by $3.5 million and $2.7 million, respectively as of April 1, 2011 and December 31, 2010 from $5.3 and $3.2 million as previously reported to $1.8 and $0.5 million, respectively. Prepaid and other current assets were reduced by $3.5 and $2.7 million as of April 1, 2011 and December 31, 2010 from $7.1 and $5.9 million as previously reported to $3.6 and $3.2 million, respectively. Additionally, the consolidated statement of cash flows for the quarter ended April 1, 2011 has been corrected, within cash flows from operating activities, to report a change in prepaid expenses and other current assets of $0.4 million rather than a change of $1.2 million as previously reported, and a change in accrued liabilities of $(1.8) million rather than a change of $2.6 million as previously reported. These corrections had no effect on the Company’s previously reported stockholders’ equity, net loss, net cash provided by operations.

5. Net Income Per Share

Basic net income per share excludes dilution and is computed by dividing net income by the weighted average number of common shares outstanding for the period. Diluted net income per share reflects the potential dilution that would occur if outstanding securities or other contracts to issue common stock were exercised or converted into common stock.

12

ULTRA CLEAN HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

The following is a reconciliation of the numerators and denominators used in computing basic and diluted net income per share (in thousands, except per share data):

	Three months ended
	March 30, 2012		April 1, 2011
Numerator:
Net income	$	4,660	$	5,820
Denominator:
Shares used in computation — basic:
Weighted average common shares outstanding		23,013		22,468
Shares used in computing basic net income per share		23,013		22,468
Shares used in computation — diluted:
Shares used in computing basic net income per share		23,013		22,468
Dilutive effect of common shares outstanding subject to repurchase		264		354
Dilutive effect of options outstanding		411		694
Shares used in computing diluted net income per share		23,688		23,516
Net income per share — basic	$	0.20	$	0.26
Net income per share — diluted	$	0.20	$	0.25

The Company had securities outstanding which could potentially dilute basic earnings per share in the future, but the incremental shares from the assumed exercise of these securities were excluded in the computation of diluted net income per share, as their effect would have been anti-dilutive. Such outstanding securities consisted of 548,138 and 323,276 stock options for the quarters ended March 30, 2012 and April 1, 2011, respectively.

6. Commitments and Contingencies

The Company had commitments to purchase inventory totaling approximately $42.6 million at March 30, 2012.

The Company also leases properties domestically in Hayward, California, Austin, Texas and South San Francisco, California and internationally in China and Singapore. The Company’s total remaining future minimum lease payments as of March 30, 2012, over the remaining terms of these leases will be approximately $11.7 million.

From time to time, the Company is subject to various legal proceedings and claims, either asserted or unasserted, that arise in the ordinary course of business. Although the outcome of the various legal proceedings and claims cannot be predicted with certainty, the Company has not had a history of outcomes to date that have been material to the statement of operations and does not believe that any current proceedings or other claims will have a material effect on its consolidated financial condition or results of operations.

7. Segment Information

The Company operates in one reportable segment and is engaged in the development, manufacture and supply of critical subsystems for the semiconductor capital equipment, flat panel, medical, energy and research industries. The nature of the Company’s products and production processes as well as type of customers and distribution methods is consistent among all of the Company’s products. The Company’s foreign operations are conducted primarily through its wholly-owned subsidiary in China. The Company’s principal markets include North America, Asia and, to a lesser degree, Europe. Sales by geographic area represent sales to unaffiliated customers.

All information on sales by geographic area is based upon the location to which the products were shipped. The following table sets forth revenue by geographic area (in thousands):

	Three months ended
	March 30, 2012		April 1, 2011
Sales
United States	$	81,987	$	109,809
Asia		28,484		15,899
Europe		93		1,011
Total	$	110,565	$	126,719

At March 30, 2012 and April 1, 2011, approximately $4.7 million and $4.3 million, respectively, of the Company’s long-lived assets were located in Asia, and the remaining balances were located in the United States.

13

ITEM 2. Management’s Discussion And Analysis of Financial Condition And Results Of Operations

You should read the following discussion of our financial condition and results of operations in conjunction with the condensed consolidated financial statements and the notes thereto included elsewhere in this Quarterly Report on Form 10-Q and our Annual Report on Form 10-K filed with the SEC on March 21, 2012. This Quarterly Report on Form 10-Q contains “forward-looking statements” that involve substantial risks and uncertainties. The statements contained in this Quarterly Report on Form 10-Q that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, including, but not limited to, statements regarding our expectations, beliefs, intentions, strategies, future operations, future financial position, future revenue, projected expenses gross margins and plans and objectives of management. In some cases, you can identify forward-looking statements by terms such as “anticipate,” “believe,” “estimate,” “expect,” “intend,” “may,” “might,” “plan,” “project,” “will,” “would,” “should,” “could,” “can,” “predict,” “potential,” “continue,” “objective,” or the negative of these terms, and similar expressions intended to identify forward-looking statements. However, not all forward-looking statements contain these identifying words. These forward-looking statements reflect our current views about future events and involve known risks, uncertainties and other factors that may cause our actual results, performance or achievement to be materially different from those expressed or implied by the forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those identified below, and those discussed in the section titled “Risk Factors” included in this Quarterly Report on Form 10-Q and our Annual Report on Form 10-K filed with the SEC on March 21, 2012. Furthermore, such forward-looking statements speak only as of the date of this report. Except as required by law, we undertake no obligation to update any forward-looking statements to reflect events or circumstances after the date of such statements.

Overview

We are a leading developer and supplier of critical subsystems, primarily for the semiconductor capital equipment industry. We also leverage the specialized skill sets required to support semiconductor capital equipment to serve the technologically similar markets in the flat panel, medical, energy and research industries, collectively referred to as “Other Addressed Industries.” We develop, design, prototype, engineer, manufacture and test subsystems which are highly specialized and tailored to specific steps in the semiconductor manufacturing process as well as the manufacturing process in Other Addressed Industries. Our revenue is derived primarily from the sale of gas delivery systems and other critical subsystems including chemical mechanical planarization (“CMP”) subsystems, chemical delivery modules, top-plate assemblies, frame assemblies, process modules and other high level assemblies.

Our customers are primarily original equipment manufacturers (OEMs) in industries we support, providing customers complete subsystem solutions that combine our expertise in design, test, component characterization and highly flexible manufacturing operations with quality control and financial stability. This combination helps us to drive down total manufacturing costs, reduce design-to-delivery cycle times and maintain high quality standards for our customers. We believe these characteristics, as well as our standing as a leading supplier of gas delivery systems and other critical subsystems, place us in a position to benefit from the growing demand for subsystem outsourcing.

Financial Highlights

Sales for the three months ended March 30, 2012, were $110.6 million, a decrease of $16.1 million, or 12.7%, from the comparable quarter of 2011. Gross profit in the first quarter of 2012 decreased $1.9 million, to 15.7 million, or 14.2% of sales, from $17.6 million, or 13.9% of sales, in the first quarter of 2011. Total operating expenses in the first quarter of 2012 were $9.4 million, or 8.5% of sales, compared to $9.4 million, or 7.4% of sales, for the first quarter of 2011. We earned net income of $4.7 million for the first quarter of 2012 compared to net income of $5.8 million during the first quarter of 2011.

Our two largest customers accounted for approximately 75% of the Company’s sales in the first three months of 2012. For a further discussion, see Note 1. Organization Basis of Presentation and Significant Accounting Policies- Significant sales to customers in Notes to Condensed Consolidated Financial Statements above.

Effective as of the end of the first quarter of 2012, we agreed to terminate our arrangement with FEI Corporation, whereby FEI would take back the manufacturing process we took over and have been executing since 2008. As part of the arrangement, we agreed to assist FEI during the transition period through our third quarter of fiscal 2012 and, as a result, will receive an income stream related to these efforts during that timeframe of $2.1 million, offset with associated costs. During the second quarter of fiscal 2012, we received payments related to the transition efforts as well as for all outstanding accounts receivable and remaining inventory.

Results of Operations

For the periods indicated, the following table sets forth certain costs and expenses and other income items as a percentage of sales. The table and subsequent discussion should be read in conjunction with our condensed consolidated financial statements and notes thereto included elsewhere in this quarterly report.

	Three months ended
	March 30, 2012			April 1, 2011
Sales		100.0	%		100.0	%
Cost of goods sold		85.8	%		86.1	%
Gross profit		14.2	%		13.9	%
Operating expenses:
Research and development		1.3	%		1.3	%
Sales and marketing		1.6	%		1.6	%
General and administrative		5.6	%		4.5	%
Total operating expenses		8.5	%		7.4	%
Income from operations		5.7	%		6.5	%
Interest and other (expense), net		(0.1	)%		(0.3	)%
Income before provision for income taxes		5.6	%		6.2	%
Income tax provision		1.4	%		1.6	%
Net income		4.2	%		4.6	%

14

Sales

Sales for the first quarter of 2012 decreased $16.1 million, or 12.7%, to $110.6 million from $126.7 million in the first quarter of 2011. The reduction in revenues reflects primarily the continued softness in the energy industry as well as a decrease in semiconductor revenues recovering from the semiconductor industry downturn which began during the third quarter of fiscal 2011. We expect sales to decrease in the second quarter of fiscal 2012 compared to the current quarter primarily associated with the decline in revenue from FEI.

15

Gross Profit

Cost of goods sold consists primarily of purchased materials, labor and overhead, including depreciation related to certain capital assets associated with the design and manufacture of products sold. Gross profit for the three months ended March 30, 2012, decreased $1.9 million to $15.7 million, or 14.2% of sales, from $17.6 million, or 13.9% of sales, for the same period in 2011. Our gross margin for the three months ended March 30, 2012, increased from the comparable period in 2011 due primarily to a more favorable product mix and continued cost control measures offset by lower factory utilization resulting from lower revenues during the first quarter of 2012. We expect our gross profit to be lower in the second quarter of 2012 due to expected lower revenues, however, we anticipate that our gross margin will be unchanged with the current quarter.

Research and Development Expense

Research and development expense consists primarily of activities related to new component testing and evaluation, test equipment and fixture development, product design, and other product development activities. Research and development expense for the first quarter of 2012 decreased $0.2 million, or 12.4%, to $1.4 million, or 1.3% of sales, compared to $1.6 million, or 1.3% of sales in the same quarter in 2011. The decrease in expense is primarily due to payroll and associated costs as a result of reduced headcount and the reassignment of existing resources to research and development activities.

Sales and Marketing Expense

Sales and marketing expense consists primarily of salaries and commissions paid to our sales and service employees, salaries paid to our engineers who work with the sales and service employees to help determine the components and configuration requirements for new products and other costs related to the sales of our products. Sales and marketing expense for the first quarter of 2012 decreased $0.3 million to $1.7 million, or 1.6% of sales, compared to $2.1 million, or 1.6% of sales, in the same quarter of 2011. The decrease in expense is primarily due to decreased payroll and related benefit costs due to reduced headcount and a reduction in the use of temporary personnel. Sales and marketing expense as a percentage of sales was unchanged when comparing first quarter of 2012 as compared to first quarter of 2011.

General and Administrative Expense

General and administrative expense consists primarily of salaries and overhead associated with our administrative staff and professional fees. General and administrative expense increased approximately $0.5 million, or 9.5% in the first quarter of 2012 to $6.2 million, or 5.6% of sales, compared with $5.7 million, or 4.5% of sales, in the same quarter of 2011. The increase in dollars when comparing the first quarter 2012 with the first quarter 2011 is due to an increase in payroll and associated benefit costs in part as a result of a change in the mix of our headcount and increases in certain professional fees. The increase in general and administrative expense as a percent of sales in the first quarter of 2012 compared to the first quarter of 2011 is due to decreased sales.

Interest and Other Income (Expense), net

Interest and other income (expense), net for the first quarter of 2012 was $(0.1) million compared to $(0.4) million in the first quarter of 2011. The Company experienced a decrease in interest expense in the first quarter of 2012 primarily due to a significant reduction in the average balance of the Company’s line of credit during the first quarter of 2012 as compared to the first quarter of 2011.

Income Tax Provision

Our effective tax rate for the quarters ended March 30, 2012, and April 1, 2011, was 24.4% and 25.6%, respectively. The change in respective rates reflects, primarily, a change in the geographic distribution of our world-wide earnings in foreign jurisdictions with lower tax rates or tax holidays.

Liquidity and Capital Resources

We have required capital principally to fund our working capital needs, satisfy our debt obligations, maintain our equipment and purchase new capital equipment. As of March 30, 2012, we had cash of $54.8 million compared to $52.2 million as of December 30, 2011.

For the first quarter of 2012, we generated cash from operating activities of $3.9 million compared to $1.9 million for the first quarter of 2011. Operating cash flows generated in the first quarter of 2012 were from $4.7 million of net income; net non-cash activity, including depreciation and amortization of $0.7 million and stock-based compensation of $1.3 million; and increases in accounts payable of $9.4 million and accrued liabilities of $0.5 million, respectively, offset by an increase in accounts receivable of $7.9 million, an increase in inventory of $5.5 million and an increase in prepaid expenses and other current assets of $0.7 million. The increase in accounts payables is primarily associated with the Company’s increase in inventory. The increases in accounts receivable and inventory balances are due to timing of shipments and purchases, respectively, in the current quarter compared to the previous quarter ended December 30, 2011. Our cash flows from operations in any given period are largely driven by the timing of sales, the collection of accounts receivable and the payment of accounts payable.

Net cash used in investing activities for the first quarter of 2012, decreased to $0.2 million from $1.2 million in the first quarter of 2011 as a result of a decrease in capital expenditures. These investments in equipment and leasehold improvements reflect our continued investment in our Asian subsidiaries as well as our domestic operating units and are driven by the timing of our capital expenditures budget.

Net cash used in financing activities for the first quarter of 2012, was $1.1 million compared to $0.1 million for the first quarter of 2011. For the quarter ended March 30, 2012, our cash used in financing activities was due to payments on the Company’s term debt and capital lease obligations of $0.9 million and employees’ taxes paid upon vesting of restricted stock units of $0.3 million, offset by proceeds from option exercises of $0.1 million.

We anticipate that our existing cash balance and operating cash flow, together with available borrowings under our credit facility, will be sufficient to meet our working capital requirements and technology development projects for at least the next twelve months. The adequacy of these resources to meet our liquidity needs beyond that period will depend on our growth, the state of the worldwide economy, the cyclical expansion or contraction of the semiconductor capital equipment industry and the other industries we serve and capital expenditures required to meet possible increased demand for our products.

However, in order to expand our business or acquire additional complementary businesses or technologies, we may need to raise additional funds through equity or debt financings. If required, additional financing may not be available on terms that are favorable to us, if at all. If we raise additional funds through the issuance of equity or convertible debt securities, our stockholders’ equity interest will be diluted and these securities might have rights, preferences and privileges senior to those of our current stockholders. No assurance can be given that additional financing will be available or that, if available, such financing can be obtained on terms favorable to our stockholders and us.

16

The undistributed earnings of our foreign subsidiaries at March 30, 2012, are considered to be indefinitely reinvested and no distribution of those earnings in the form of dividends or otherwise, as well as related provisions for U.S. income taxes, have been provided thereon. The Company anticipates it has adequate liquidity and capital resources at the subsidiary level and would not need to repatriate earnings.

Borrowing Arrangements

We have borrowing arrangements under our Loan Agreement which includes a $25.0 million revolving credit facility and one term loan. The aggregate amount of the revolving credit facility, which matures on December 31, 2013, is subject to a borrowing base equal to 80% of eligible accounts receivable and 45% of eligible inventory (total eligible inventory not to exceed $3.5 million) and is secured by substantially all of our assets. The revolving credit facility bears interest per annum at a variable rate equal to the greater of prime rate, as defined in the Loan Agreement, plus a margin of 25 basis points. The interest rate at March 30, 2012, on the revolving credit facility was 3.5%. The revolving credit facility contains certain reporting and financial covenants that must be met on a quarterly basis in order for us to remain in compliance. We were in compliance with all of our bank covenants as of March 30, 2012. The revolving credit facility balance as of March 30, 2012 was $19.5 million.

As of March 30, 2012, we had one term loan with our banking facility for $8.0 million, which matures on October 21, 2013. The term loans bear interest per annum at a variable rate equal to the greater of prime rate, as defined per the Loan Agreement, plus a margin of 75 basis points. During the first quarter ended and as of March 30, 2012, the interest rate on the outstanding term loan was 4.0%. The balance of the term loan as of March 30, 2012, was $4.3 million.

Total debt outstanding as of March 30, 2012, was $23.8 million.

Capital Expenditures

Capital expenditures were $0.2 million in the quarter ended March 30, 2012. The Company’s anticipated capital expenditures for the remainder of 2012 are approximately $1.0 million.

Off-Balance Sheet Arrangements

During the periods presented, we did not have any relations with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes.

Contractual Obligations

Other than operating leases for certain equipment and real estate and purchase order commitments primarily for inventory, we have no off-balance sheet transactions, unconditional purchase obligations or similar instruments and, other than the revolving credit facility described above, are not a guarantor of any other entities’ debt or other financial obligations. The following table summarizes our future minimum lease payments, principal payments under debt obligations and our purchase obligations for the purchase of inventory as of March 30, 2012 (in thousands):

	2012		2013		2014		2015		2016		Thereafter		Total
Capital leases	$	7	$	10	$	7	$	—	$	—	$	—	$	24
Operating leases (1)		3,246		3,745		3,083		1,281		321		—		11,676
Borrowing arrangements		2,021		21,802		—		—		—		—		23,823
Purchase order commitments		42,635		—		—		—		—		—		42,635
Total (2)	$	47,909	$	25,557	$	3,090	$	1,281	$	321	$	—	$	78,158

(1) Operating lease expense reflects (a) the lease for our headquarters facility in Hayward, California that expires in 2015; (b) the leases for manufacturing facilities in South San Francisco that expire in 2012 thru 2013 (c) the leases for manufacturing facilities in China and Singapore that expire in 2012 thru 2016 and; (d) the leases for manufacturing facilities in Austin, Texas that expire in 2016. We have options to renew certain of the leases in South San Francisco, Hayward and Austin which we expect to exercise.

(2) As a result of the implementation of FASB’s guidance regarding accounting for uncertainty in income taxes, we have recorded an additional tax liability of $137,000 to offset the recognition of previously recorded excess tax benefits. Because of the uncertainty surrounding the future payment of these liabilities, the amount has been excluded from the table above.

17

Critical Accounting Policies, Significant Judgments and Estimates

Our condensed consolidated financial statements have been prepared in accordance with GAAP, which requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue and expenses and related disclosure at the date of our financial statements. Estimates and judgments are reviewed on an on-going basis, including those related to sales, inventories, intangible assets, stock compensation and income taxes. The estimates and judgments are based on historical experience and on various other factors that we believe to be reasonable under the circumstances, the results of which form the basis of the judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates. We consider certain accounting policies related to the purchase accounting, revenue recognition, inventory valuation, accounting for income taxes, valuation of intangible assets and goodwill and equity incentives to employees to be critical policies due to the estimates and judgments involved in each. Our significant accounting policies and critical estimates are disclosed in our 2011 Annual Report on Form 10-K as filed with the SEC on March 21, 2012. No material changes to our significant accounting policies and critical estimates have occurred subsequent to December 30, 2011.

Recently Issued Accounting Standards

See Recently Issued Accounting Standards in Note 1 of Notes to Condensed Consolidated Financial Statements.

ITEM 3. Quantitative and Qualitative Disclosures About Market Risk

Market risk represents the risk of changes in value of financial instruments caused by fluctuations in interest rates and foreign exchange rates.

Foreign Exchange Rates

Currently, a significant majority of our sales and arrangements with third-party suppliers provide for pricing and payment in U.S. dollars, and, therefore, are not subject to material exchange rate fluctuations. Therefore, we do not expect foreign currency exchange rate fluctuations to have a material effect on our results of operations. However, increases in the value of the U.S. dollar relative to other currencies would make our products more expensive relative to competing products priced in such other currencies,, which could negatively impact our ability to compete. Conversely, decreases in the value of the U.S. dollar relative to other currencies could result in our foreign suppliers raising their prices in order to continue doing business with us.

Chinese authorities recently relaxed controls of its currency, the Renminbi, and allowed the currency to strengthen against other world currencies, including the U.S. dollar. We continue to monitor any potential impact of the appreciation of the Renminbi on our operations in China as well as globally. Changes in the value of the Renminbi did not have a material impact on our results of operations for the current quarter and any fiscal periods in 2011.

Interest Rates

Our interest rate risk relates primarily to our outstanding debt which totals $23.8 million as of March 30, 2012, and carries interest rates pegged to the prime rate. An immediate increase in interest rates of 100 basis points would increase our interest expense by less than $0.1 million per quarter. This would be partially offset by increased interest income on our invested cash. Conversely, an immediate decline of 100 basis points in interest rates would decrease our interest expense by less than $0.1 million per quarter. This would be partially offset by decreased interest income on our invested cash.

ITEM 4. Controls and Procedures

As required by Rule 13a-15(b) under the Securities Exchange Act of 1934 (the “Exchange Act”), management, including our Chief Executive Officer and Chief Financial Officer, conducted an evaluation as of the end of the period covered by this report, of the effectiveness of our disclosure controls and procedures as defined in Exchange Act Rule 13a-15(e). Based upon our evaluation, we concluded that our disclosure controls and procedures were effective as of March 30, 2012.

As required by Rule 13a-15(d), management, including our Chief Executive Officer and Chief Financial Officer, also conducted an evaluation of our internal control over financial reporting to determine whether any changes occurred during the period covered by this report that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. Based on our evaluation, we concluded that there has been no such change during the fiscal quarter covered by this report.

Any system of controls, however well designed and operated, can provide only reasonable, and not absolute, assurance that the objectives of the system will be met. In addition, the design of any control system is based in part upon certain assumptions about the likelihood of future events.

18

PART II. OTHER INFORMATION

ITEM 1. Legal Proceedings

From time to time, we are subject to various legal proceedings and claims, either asserted or unasserted, that arise in the ordinary course of business. Although the outcome of the various legal proceedings and claims cannot be predicted with certainty, we have not had a history of outcomes to date that have been material to our statement of operations and do not believe that any of these proceedings or other claims will have a material effect on our consolidated financial condition or results of operations.

ITEM 1A. Risk Factors

The highly volatile nature of the industries we serve could harm our operating results.

Our business and operating results depend in significant part upon capital expenditures by manufacturers in the semiconductor capital equipment, flat panel, medical, energy and research industries, which in turn depend upon the current and anticipated market demand for such products. Historically, the industries we serve (in particular the semiconductor industry) have been highly cyclical, with recurring periods of over-supply of products that have had a severe negative effect on the demand for capital equipment used to manufacture such products. We have experienced and anticipate that we will continue to experience significant fluctuations in customer orders for our products through such cycles. Slowdowns in the industries we serve have had, and future slowdowns may also have, a material adverse effect on our operating results. During periods of decreasing demand for our products, we must be able to appropriately align our cost structure with prevailing market conditions, effectively manage our supply chain and motivate and retain employees. During periods of increased demand, we must increase manufacturing capacity and inventory to meet customer demands, effectively manage our supply chain and attract, retain and motivate a sufficient number of employees. If we are not able to timely and appropriately adapt to the changes in our business environment, our results of operations will be harmed. Also, the cyclical and volatile nature of the industries we serve make future revenues, results of operations and net cash flows difficult to estimate.

We rely on a small number of customers for a significant portion of our sales, and any impairment of our relationships with these customers would adversely affect our business.

A relatively small number of OEM customers have historically accounted for a significant portion of our sales, and we expect this trend to continue. As a group, three customers accounted for 68%, 72% and 79% of our sales for fiscal years 2011, 2010 and 2009, respectively. Because of the small number of OEMs in the markets we serve, most of which are already our customers, it would be difficult to replace lost revenue resulting from the loss of, or the reduction, cancellation or delay in purchase orders by any one of these customers. Our customer contracts generally do not require our customers to place any orders with us. Consolidation among our customers, or a decision by any one or more of our customers to outsource all or most manufacturing and assembly work to a single equipment manufacturer, may further concentrate our business in a limited number of customers and expose us to increased risks relating to dependence on an even smaller number of customers. For example, two of our largest semiconductor customers recently announced that they had entered into a merger agreement pursuant to which they would combine businesses. Also, In November 2011, Applied Materials, Inc. completed the acquisition of Varian Semiconductor Equipment Associates, Inc., one of our customers. In addition, we have in the past lost business from customers who have taken the manufacturing of our products in-house. For example, we terminated our manufacturing services to FEI Company at the beginning of our second quarter of fiscal 2012. If we are unable to replace revenue from customers who determine to take subsystem assembly in-house, or if additional customers determine to in-source subsystem assembly, such events could have a material adverse impact on our financial position and results of operation.

In addition, by virtue of our largest customers’ size and the significant portion of revenue that we derive from them, they are able to exert significant influence and pricing pressure in the negotiation of our commercial agreements and the conduct of our business with them. We may also be asked to accommodate customer requests that extend beyond the express terms of our agreements in order to maintain our relationships with our customers. If we are unable to retain and expand our business with these customers on favorable terms, our business and operating results will be adversely affected.

We have had to qualify, and are required to maintain our status, as a supplier for each of our customers. This is a lengthy process that involves the inspection and approval by a customer of our engineering, documentation, manufacturing and quality control procedures before that customer will place volume orders. Our ability to lessen the adverse effect of any loss of, or reduction in sales to, an existing customer through the rapid addition of one or more new customers is minimal because of these qualification requirements. Consequently, our business, operating results and financial condition would be adversely affected by the loss of, or any reduction in orders by, any of our significant customers.

We are exposed to risks associated with weakness in the global economy.

We rely to a significant extent on OEM customers, whose business, in turn, depends largely on consumer spending and capital expenditures by businesses. Continuing difficulties in the financial markets and uncertainty regarding the global economy are posing challenges to our business. Economic uncertainty and related factors, including unemployment, inflation and fuel prices, exacerbate negative trends in business and consumer spending and may cause certain of our customers to push out, cancel, or refrain from placing orders for products or services, which may reduce sales. Difficulties in obtaining capital, uncertain market conditions, or reduced profitability may also cause some customers to scale back operations, exit businesses, merge with other manufacturers, or file for bankruptcy protection and potentially cease operations, leading to customers’ reduced research and development funding and/or capital expenditures and, in turn, lower orders from our customers and/or additional slow moving or obsolete inventory or bad debt expense for us. These conditions may also similarly affect key suppliers, which could impair their ability to deliver parts and result in delays for our products or require us to either procure products from high-cost suppliers, or if no additional suppliers exist, to reconfigure the design and manufacture of our products, and we may be unable to fulfill some customer orders. While past downturns in our business have been followed by periods of growth, this correlation may not occur in the future.

Our dependence on our suppliers may prevent us from delivering an acceptable product on a timely basis.

We rely on both single-source and sole-source suppliers, some of whom are relatively small, for many of the components we use in our products. In addition, our customers often specify components of particular suppliers that we must incorporate into our products. Our suppliers are under no obligation to provide us with components. As a result, the loss of or failure to perform by any of these providers could adversely affect our business and operating results. In addition, the manufacturing of certain components and subsystems is an extremely complex process. Therefore, if a supplier were unable to provide the volume of components we require on a timely basis and at acceptable prices and quality, we would have to identify and qualify replacements from alternative sources of supply. However, the process of qualifying new suppliers for complex components is also lengthy and could delay our production, which would adversely affect our business, operating

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results and financial condition. Disruption in supply resulting from natural disasters, such as the recent earthquakes, tsunami and related events in Japan may result in certain of our suppliers being unable to deliver sufficient quantities of components or raw materials at all or in a timely manner. If we, or our vendors, are unable to procure sufficient quantities of components or raw materials from suppliers, it could influence decisions by our customers to delay or cancel orders and decisions by our vendors to fulfill our purchase orders and, consequently, have a material adverse effect on our results of operations.

We may also experience difficulty in obtaining sufficient supplies of components and raw materials in times of significant growth in our business. For example, we have in the past experienced shortages in supplies of various components, such as mass flow controllers, valves and regulators, and certain prefabricated parts, such as sheet metal enclosures, used in the manufacture of our products. In addition, one of our competitors manufactures mass flow controllers that may be specified by one or more of our customers. If we are unable to obtain these particular mass flow controllers from our competitor or convince a customer to select alternative mass flow controllers, we may be unable to meet that customer’s requirements, which could result in a loss of market share.

We may not be able to respond quickly enough to increases in demand for our products.

Demand shifts in the industries we serve are rapid and difficult to predict, and we may not be able to respond quickly enough to an increase in demand. Our ability to increase sales of our products depends, in part, upon our ability to:

• mobilize our supply chain in order to maintain component and raw material supply;

• optimize the use of our design, engineering and manufacturing capacity in a timely manner;

• deliver our products to our customers in a timely fashion;

• expand, if necessary, our manufacturing capacity; and

• maintain our product quality as we increase production.

If we are unable to respond to rapid increases in demand for our products on a timely basis or to manage any corresponding expansion of our manufacturing capacity effectively, our customers could increase their purchases from our competitors, which would adversely affect our business.

We may not be able to fund our future capital requirements from our operations, and financing from other sources may not be available on favorable terms or at all.

We made capital expenditures of approximately $4.0 million in fiscal 2011, related to our manufacturing facilities in the United States, China and Singapore. The amount of our future capital requirements will depend on many factors, including:

• the cost required to ensure access to adequate manufacturing capacity;

• the timing and extent of spending to support product development efforts;

• the timing of introductions of new products and enhancements to existing products;

• changing manufacturing capabilities to meet new customer requirements; and

• market acceptance of our products.

As of December 30, 2011, we had two term loans, one for $3.0 million maturing on January 29, 2012 and one for $8.0 million maturing on October 21, 2013, and a revolving line of credit for up to $25.0 million, of which $5.2 million was available to be drawn as of December 30, 2011, that matures on December 31, 2013. However, we may need to raise additional funds through public or private equity or debt financing if our current cash and cash flow from operations are insufficient to fund our future activities. We may not be able to obtain additional debt financing when and if necessary in a timely manner. In addition, banks have sometimes been unable or unwilling to satisfy their obligations under existing credit arrangements. Access to capital markets has, in the past, been unavailable to companies such as ours and there can be no assurance that we would be able to complete an equity or other financing on terms satisfactory to us or at all. In addition, equity financings could be dilutive to holders of our common stock, and debt financings would likely involve covenants that restrict our business operations. If we cannot raise funds on acceptable terms, if and when needed, we may not be able to develop or enhance our products, take advantage of future opportunities, including potential acquisitions, grow our business or respond to competitive pressures or unanticipated requirements, any of which could adversely affect our business, operating results and financial condition.

Our quarterly revenue and operating results fluctuate significantly from period to period, and this may cause volatility in our common stock price.

Our quarterly revenue and operating results have fluctuated significantly in the past, and we expect them to continue to fluctuate in the future for a variety of reasons which may include:

• demand for and market acceptance of our products as a result of the cyclical nature of the industries we serve or otherwise, often resulting in reduced sales during industry downturns and increased sales during periods of industry recovery;

• overall economic conditions;

• changes in the timing and size of orders by our customers;

• strategic decisions by our customers to terminate their outsourcing relationship with us;

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• strategic consolidation by our customers;

• cancellations and postponements of previously placed orders;

• pricing pressure from either our competitors or our customers, resulting in the reduction of our product prices;

• disruptions or delays in the manufacturing of our products or in the supply of components or raw materials that are incorporated into or used to manufacture our products, thereby causing us to delay the shipment of products;

• decreased margins for several or more quarters following the introduction of new products, especially as we introduce new subsystems;

• delays in ramp-up in production, low yields or other problems experienced at our manufacturing facilities in China;

• changes in design-to-delivery cycle times;

• inability to reduce our costs quickly in step with reductions in our prices or in response to decreased demand for our products;

• changes in our mix of products sold;

• write-offs of excess or obsolete inventory;

• one-time expenses or charges associated with failed acquisition negotiations or completed acquisitions;

• announcements by our competitors of new products, services or technological innovations, which may, among other things, render our products less competitive; and

• geographic mix of worldwide earnings.

As a result of the foregoing, we believe that quarter-to-quarter comparisons of our revenue and operating results may not be meaningful and that these comparisons may not be an accurate indicator of our future performance. Changes in the timing or terms of a small number of transactions could disproportionately affect our operating results in any particular quarter. Moreover, our operating results in one or more future quarters may fail to meet the expectations of securities analysts or investors. If this occurs, we would expect to experience an immediate and significant decline in the trading price of our common stock.

We have established, and as markets will allow, intend to expand our operations in Asia, which exposes us to risks associated with operating in a foreign country.

Depending on market conditions, we intend to expand our operations in Asia, principally in China and Singapore. The book value of our assets in Asia was $67.0 million as of December 30, 2011.

We are exposed to political, economic, legal and other risks associated with operating in Asia, including:

• foreign currency exchange fluctuations;

• political, civil and economic instability;

• tariffs and other barriers;

• timing and availability of export licenses;

• disruptions to our and our customers’ operations due to the outbreak of diseases, such as SARS and avian flu;

• disruptions in operations due to China’s developing domestic infrastructure, including transportation and energy;

• difficulties in developing relationships with local suppliers;

• difficulties in attracting new international customers;

• difficulties in accounts receivable collections;

• difficulties in staffing and managing distant international subsidiary and branch operations;

• the burden of complying with foreign and international laws and treaties;

• difficulty in transferring funds to other geographic locations; and

• potentially adverse tax consequences.

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Our operations in Asia also subject us to U.S. laws governing the export of equipment. These laws are complex and require us to obtain clearances for the export to Asia of certain equipment. We may fail to comply with these laws and regulations, which could require us to cease use of certain equipment and expose us to fines or penalties.

Over the past several years the Chinese government has pursued economic reform policies, including the encouragement of private economic activity and greater economic decentralization. The Chinese government may not continue these policies or may significantly alter them to our detriment from time to time without notice. Changes in laws and regulations or their interpretation, the imposition of confiscatory taxation policies, new restrictions on currency conversion or limitations on sources of supply could materially and adversely affect our Chinese operations, which could result in the partial or total loss of our investment in that country and materially and adversely affect our future operating results.

We are subject to order and shipment uncertainties and any significant reductions, cancellations or delays in customer orders could cause our revenue to decline and our operating results to suffer.

Our revenue is difficult to forecast because we generally do not have a material backlog of unfilled orders and because of the short time frame within which we are often required to design, produce and deliver products to our customers. Most of our revenue in any quarter depends on customer orders for our products that we receive and fulfill in the same quarter. We do not have long-term purchase orders or contracts that contain minimum purchase commitments from our customers. Instead, we receive non-binding forecasts of the future volume of orders from our customers. Occasionally, we order and build component inventory in advance of the receipt of actual customer orders. Customers may cancel order forecasts, change production quantities from forecasted volumes or delay production for reasons beyond our control. Furthermore, reductions, cancellations or delays in customer order forecasts usually occur without penalty to or compensation from, the customer. Reductions, cancellations or delays in forecasted orders could cause us to hold inventory longer than anticipated, which could reduce our gross profit, restrict our ability to fund our operations and cause us to incur unanticipated reductions or delays in revenue. If we do not obtain orders as we anticipate, we could have excess component inventory for a specific product that we would not be able to sell to another customer, likely resulting in inventory write-offs, which could have a material adverse effect on our business, financial condition and operating results. In addition, because many of our costs are fixed in the short term, we could experience deterioration in our gross profit when our production volumes decline.

The manufacturing of our products is highly complex, and if we are not able to manage our manufacturing and procurement process effectively, our business and operating results will suffer.

The manufacturing of our products is a highly complex process that involves the integration of multiple components and requires effective management of our supply chain while meeting our customers’ design-to-delivery cycle time requirements. Through the course of the manufacturing process, our customers may modify design and system configurations in response to changes in their own customers’ requirements. In order to rapidly respond to these modifications and deliver our products to our customers in a timely manner, we must effectively manage our manufacturing and procurement process. If we fail to manage this process effectively, we risk losing customers and damaging our reputation. We may also be subject to liability under our agreements with our customers if we or our suppliers fail to re-configure manufacturing processes or components in response to these modifications, which may lead to product defect claims by our customers. In addition, if we acquire inventory in excess of demand or that does not meet customer specifications, we could incur excess or obsolete inventory charges. These risks are even greater during the current extended period of macroeconomic uncertainty and as we continue to expand our business beyond gas delivery systems into new subsystems. In the current economic environment, certain of our suppliers may be forced out of business, which could require us to either procure products from higher-cost suppliers or, if no additional suppliers exist, reconfigure the design and manufacture of our products. This could limit our growth and have a material adverse effect on our business, financial condition and operating results.

OEMs may not continue to outsource critical subsystems, which would adversely impact our operating results.

The success of our business depends on OEMs continuing to outsource the manufacturing of critical subsystems. Most of the largest OEMs have already outsourced production of a significant portion of their critical subsystems. If OEMs do not continue to outsource critical subsystems for their capital equipment, our revenue would be significantly reduced, which would have a material adverse effect on our business, financial condition and operating results. In addition, if we are unable to obtain additional business from OEMs, even if they continue to outsource their production of critical subsystems, our business, financial condition and operating results could be adversely affected.

If our new products are not accepted by OEMs or if we are unable to maintain historical margins on our new products, our operating results would be adversely impacted.

We design, develop and market critical subsystems to OEMs. The introduction of new products is inherently risky because it is difficult to foresee the adoption of new standards, coordinate our technical personnel and strategic relationships and win acceptance of new products by OEMs. We may not be able to recoup design and development expenditures if our new products are not accepted by OEMs. Newly introduced products typically carry lower gross margins than existing products for several or more quarters following their introduction. If any of our new subsystems are not successful in the market, or if we are unable to obtain gross margins on new products that are similar to the gross margins we have historically achieved, our business, operating results and financial condition could be adversely affected.

We may not be able to integrate efficiently the operations of past and future acquired businesses.

We have made, and may in the future make, acquisitions of, or significant investments in, businesses that offer complementary products, services, technologies or market access. For example, we acquired Sieger Engineering, Inc. in June 2006. If we are to realize the anticipated benefits of past and future acquisitions or investments, the operations of these companies must be integrated and combined efficiently with our own. The process of integrating supply and distribution channels, computer and accounting systems, and other aspects of operations, while managing a larger entity, have and will present a significant challenge to our management. In addition, it is not certain that we will be able to incorporate different financial and reporting controls, processes, systems and technologies into our existing business environment. The difficulties of integration may increase because of the necessity of combining personnel with varied business backgrounds and combining different corporate cultures and objectives. We may assume or incur substantial debt and incur substantial costs associated with these activities and we may suffer other material adverse effects from these integration efforts which could materially reduce our earnings, even over the long-term. We may not succeed with the integration process and we may not fully realize the anticipated benefits of the business combinations. The dedication of management resources to such integration or divestitures may divert attention from our day-to-day business, and we may need to hire additional management personnel to manage our acquisitions successfully.

In addition, we frequently evaluate acquisitions of, or significant investments in, complementary companies, assets, businesses and technologies. Even if an acquisition or other investment is not completed, we may incur significant management time and effort and financial cost in evaluating such acquisition or investment, which has in the past had, and could in the future have, an adverse effect on our results of operations. Furthermore, due to the limited liquidity in the credit market, the financing of any such acquisition may be difficult to obtain, and the terms of such financing may not be favorable.

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Our business is largely dependent on the know-how of our employees, and we generally do not have a protected intellectual property position.

Our business is largely dependent upon our design, engineering, manufacturing and testing know-how. We rely on a combination of trade secrets and contractual confidentiality provisions and, to a much lesser extent, patents, copyrights and trademarks to protect our proprietary rights. Accordingly, our intellectual property position is more vulnerable than it would be if it were protected by patents. If we fail to protect our proprietary rights successfully, our competitive position could suffer, which could harm our operating results. We may be required to spend significant resources to monitor and protect our proprietary rights, and, in the event we do not detect infringement of our proprietary rights, we may lose our competitive position in the market if any such infringement occurs. In addition, competitors may design around our technology or develop competing technologies and know-how.

Third parties have claimed and may in the future claim we are infringing their intellectual property, which could subject us to litigation or licensing expenses, and we may be prevented from selling our products if any such claims prove successful.

We have in the past and may in the future receive claims that our products, processes or technologies infringe the patents or other proprietary rights of third parties. In addition, we may be unaware of intellectual property rights of others that may be applicable to our products. Any litigation regarding our patents or other intellectual property could be costly and time-consuming and divert our management and key personnel from our business operations, any of which could have a material adverse effect on our business and results of operations. The complexity of the technology involved in our products and the uncertainty of intellectual property litigation increase these risks. Claims of intellectual property infringement may also require us to enter into costly license agreements. However, we may not be able to obtain licenses on terms acceptable to us, or at all. We also may be subject to significant damages or injunctions against the development, manufacture and sale of certain of our products if any such claims prove successful.

If we do not keep pace with developments in the industries we serve and with technological innovation generally, our products may not be competitive.

Rapid technological innovation in the markets we serve requires us to anticipate and respond quickly to evolving customer requirements and could render our current product offerings and technology obsolete. Technological innovations are inherently complex. We must devote resources to technology development in order to keep pace with such rapidly evolving technologies. We believe that our future success will depend upon our ability to design, engineer and manufacture products that meet the changing needs of our customers. This requires that we successfully anticipate and respond to technological changes in design, engineering and manufacturing processes in a cost-effective and timely manner. If we are unable to integrate new technical specifications into competitive product designs, develop the technical capabilities necessary to manufacture new products or make necessary modifications or enhancements to existing products, our business prospects could be harmed.

The timely development of new or enhanced products is a complex and uncertain process which requires that we:

• design innovative and performance-enhancing features that differentiate our products from those of our competitors;

• identify emerging technological trends in the industries we serve, including new standards for our products;

• accurately identify and design new products to meet market needs;

• collaborate with OEMs to design and develop products on a timely and cost-effective basis;

• ramp-up production of new products, especially new subsystems, in a timely manner and with acceptable yields;

• successfully manage development production cycles; and

• respond effectively to technological changes or product announcements by others.

The industries in which we participate are highly competitive and rapidly evolving, and if we are unable to compete effectively, our operating results would be harmed.

Although we have not faced competition in the past from the largest subsystem and component manufacturers in the industries we serve, these suppliers could compete with us in the future. Increased competition has in the past resulted, and could in the future result, in price reductions, reduced gross margins or loss of market share, any of which would harm our operating results. We are subject to significant pricing pressure as we attempt to maintain and increase market share with our existing customers. Competitors may introduce new products for the markets currently served by our products. These products may have better performance, lower prices and achieve broader market acceptance than our products. Further, OEMs typically own the design rights to their products and may provide these designs to other subsystem manufacturers. If our competitors obtain proprietary rights to these designs such that we are unable to obtain the designs necessary to manufacture products for our OEM customers, our business, financial condition and operating results could be adversely affected.

Our competitors may have greater financial, technical, manufacturing and marketing resources than we do. As a result, they may be able to respond more quickly to new or emerging technologies and changes in customer requirements, devote greater resources to the development, promotion, sale and support of their products, and reduce prices to increase market share. Moreover, there may be merger and acquisition activity among our competitors and potential competitors that may provide our competitors and potential competitors an advantage over us by enabling them to expand their product offerings and service capabilities to meet a broader range of customer needs. Further, if one of our customers develops or acquires the internal capability to develop and produce critical subsystems that we produce, the loss of that customer could have a material adverse effect on our business, financial condition and operating results. The introduction of new technologies and new market entrants may also increase competitive pressures.

We must achieve design wins to retain our existing customers and to obtain new customers.

New capital equipment typically has a lifespan of several years, and OEMs frequently specify which systems, subsystems, components and instruments are to be used in their equipment. Once a specific system, subsystem, component or instrument is incorporated into a piece of capital equipment, it will likely continue to be incorporated into that piece of equipment for at least several months before the OEM would be in a position to switch to the product of another supplier.

Accordingly, it is important that our products are designed into the new capital equipment of OEMs, which we refer to as a design win, in order to retain our competitive position with existing customers and to obtain new customers.

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We incur technology development and sales expenses with no assurance that our products will ultimately be designed into an OEM’s capital equipment. Further, developing new customer relationships, as well as increasing our market share at existing customers, requires a substantial investment of our sales, engineering and management resources without any assurance from prospective customers that they will place significant orders. We believe that OEMs often select their suppliers and place orders based on long-term relationships. Accordingly, we may have difficulty achieving design wins from OEMs that are not currently our customers. Our operating results and potential growth could be adversely affected if we fail to achieve design wins with leading OEMs.

Defects in our products could damage our reputation, decrease market acceptance of our products, cause the unintended release of hazardous materials and result in potentially costly litigation.

A number of factors, including design flaws, material and component failures, contamination in the manufacturing environment, impurities in the materials used and unknown sensitivities to process conditions, such as temperature and humidity, as well as equipment failures, may cause our products to contain undetected errors or defects. Problems with our products may:

• cause delays in product introductions and shipments;

• result in increased costs and diversion of development resources;

• cause us to incur increased charges due to unusable inventory;

• require design modifications;

• result in liability for the unintended release of hazardous materials;

• create claims for rework, replacement and/or damages under our contracts with customers;

• decrease market acceptance of, or customer satisfaction with, our products, which could result in decreased sales and product returns; or

• result in lower yields for semiconductor manufacturers.

If any of our products contain defects or have reliability, quality or compatibility problems, our reputation might be damaged and customers might be reluctant to buy our products. We may also face a higher rate of product defects as we increase our production levels. Product defects could result in the loss of existing customers or impair our ability to attract new customers. In addition, we may not find defects or failures in our products until after they are installed in a manufacturer’s fabrication facility. We may have to invest significant capital and other resources to correct these problems. Our current or potential customers also might seek to recover from us any losses resulting from defects or failures in our products. Hazardous materials flow through and are controlled by our products and an unintended release of these materials could result in serious injury or death. Liability claims could require us to spend significant time and money in litigation or pay significant damages.

We have outstanding indebtedness; the restrictive covenants under our debt agreements may limit our ability to expand or pursue our business strategy; if we are forced to prepay some or all of this indebtedness our financial position would be materially and adversely affected.

We have outstanding indebtedness. As of December 30, 2011, the long-term portion of our debt was $21.8 million and the short-term portion was $2.9 million, for an aggregate total of $24.7 million. As of December 30, 2011 we also had $5.2 million of undrawn capacity under our revolving credit facility. Our Loan Agreement contains certain reporting and financial covenants that must be met on a quarterly basis in order for us to remain in compliance. The covenants also restrict our ability to take certain actions, including our ability to:

• incur additional indebtedness;

• pay dividends and make distributions in respect of our capital stock;

• repurchase capital stock;

• make investments or other restricted payments outside the ordinary course of business;

• engage in transactions with stockholders and affiliates;

• create liens;

• sell or otherwise dispose of assets;

• make payments on other indebtedness, other than in the ordinary course; and

• engage in certain mergers and acquisitions.

We cannot assure you that we will meet these financial covenants in subsequent periods. Under our Loan Agreement, the bank has the right to declare all obligations immediately due and payable if we are in default. If we are unable to meet any covenants, we cannot assure you that the bank will grant waivers or amend the covenants, or that the bank will not terminate the agreement, preclude further borrowings or require us to immediately repay any outstanding borrowings. As long as our indebtedness remains outstanding, the restrictive covenants could impair our ability to expand or pursue our business strategies or obtain additional funding. Forced prepayment of some or all of our indebtedness would reduce our available cash balances and have an adverse impact on our operating and financial performance.

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The technology labor market is very competitive, and our business will suffer if we are unable to hire and retain key personnel.

Our future success depends in part on the continued service of our key executive officers, as well as our research, engineering, sales, manufacturing and administrative personnel, most of whom are not subject to employment or non-competition agreements. In addition, competition for qualified personnel in the technology industry is intense, and we operate in geographic locations in which labor markets are particularly competitive.

Our business is particularly dependent on expertise which only a very limited number of engineers possess. The loss of any of our key employees and officers, including our Chief Executive Officer, our President and Chief Operating Officer, our Chief Financial Officer or any of our Senior Vice Presidents, or the failure to attract and retain new qualified employees, could adversely affect our business, operating results and financial condition.

Fluctuations in currency exchange rates may adversely affect our financial condition and results of operations.

Our international sales are denominated primarily, though not entirely, in U.S. dollars. Many of the costs and expenses associated with our Chinese subsidiaries and Singapore subsidiary are paid in Chinese Renminbi and Singapore dollars, respectively, and we expect our exposure to Chinese Renminbi and Singapore dollars to increase as we ramp up production in those facilities. In addition, purchases of some of our components are denominated in Japanese Yen and Euros. Changes in exchange rates among other currencies in which our revenue or costs are denominated and the U.S. dollar may affect our revenue, cost of sales and operating margins. While fluctuations in the value of our revenue, cost of sales and operating margins as measured in U.S. dollars have not materially affected our results of operations historically, we do not currently hedge our foreign exchange exposure, and exchange rate fluctuations could have an adverse effect on our financial condition and results of operations in the future.

If environmental contamination were to occur in one of our manufacturing facilities, we could be subject to substantial liabilities.

We use substances regulated under various foreign, domestic, federal, state and local environmental laws in our manufacturing facilities. In addition, we may not be aware of all environmental laws or regulations that could subject us to liability in the U.S. or internationally. Our failure or inability to comply with existing or future environmental laws could result in significant remediation liabilities, the imposition of fines or the suspension or termination of the production of our products, and thus a material adverse impact on our business.

If our facilities were to experience catastrophic loss due to natural disasters, our operations would be seriously harmed.

Our facilities could be subject to a catastrophic loss caused by natural disasters, including fires and earthquakes. We have facilities in areas with above average seismic activity, such as our manufacturing facility in South San Francisco, California and our manufacturing and headquarters facilities in Hayward, California. If any of our facilities were to experience a catastrophic loss, it could disrupt our operations, delay production and shipments, reduce revenue and result in large expenses to repair or replace the facility. In addition, we have in the past experienced, and may in the future experience, extended power outages at our facilities. We do not carry insurance policies that cover potential losses caused by earthquakes or other natural disasters or power loss.

Changes in tax rates or tax assets and liabilities could affect results of operations.

As a global company, we are subject to taxation in the United States and various other countries. Significant judgment is required to determine and estimate worldwide tax liabilities. Our future annual and quarterly tax rates could be affected by numerous factors, including changes in the: (1) applicable tax laws; (2) amount and composition of pre-tax income in countries with differing tax rates; or (3) valuation of our deferred tax assets and liabilities.

In addition, we are subject to regular examination by the Internal Revenue Service and other tax authorities, and from time to time we initiate amendments to previously filed tax returns. We regularly assess the likelihood of favorable or unfavorable outcomes resulting from these examinations and amendments to determine the adequacy of our provision for income taxes, which requires estimates and judgments. Although we believe our tax estimates are reasonable, there can be no assurance that the tax authorities will agree with such estimates. We may have to engage in litigation to achieve the results reflected in the estimates, which may be time-consuming and expensive. There can be no assurance that we will be successful or that any final determination will not be materially different from the treatment reflected in our historical income tax provisions and accruals, which could materially and adversely affect our financial condition and results of operations.

The market for our stock is subject to significant fluctuation.

The size of our public market capitalization is relatively small, and the volume of our shares that are traded is low. The market price of our common stock could be subject to significant fluctuations. Among the factors that could affect our stock price are:

• quarterly variations in our operating results;

• our ability to successfully introduce new products and manage new product transitions;

• changes in revenue or earnings estimates or publication of research reports by analysts;

• speculation in the press or investment community;

• strategic actions by us or our competitors, such as acquisitions or restructurings;

• announcements relating to any of our key customers, significant suppliers or the semiconductor manufacturing and capital equipment industry generally;

• general market conditions;

• the effects of war and terrorist attacks; and

• domestic and international economic factors unrelated to our performance.

The stock markets in general, and the markets for technology stocks in particular, have experienced extreme volatility that has often been unrelated to the operating performance of particular companies. These broad market fluctuations may adversely affect the trading price of our common stock.

If securities or industry analysts do not publish research or reports about our business, or if they issue an adverse opinion regarding our stock, our stock price and trading volume could decline.

The trading market for our common stock is influenced by the research and reports that industry or securities analysts publish about us or our business. If any of the analysts who cover us issue an adverse opinion regarding our stock, our stock price would likely decline. If one or more of these analysts ceases coverage of our company or fails to publish reports on us regularly, we could lose visibility in the financial markets, which in turn could cause our stock price or trading volume to decline.

25

We do not currently intend to pay dividends on our common stock and, consequently, your ability to achieve a return on your investment will depend on appreciation in the price of our common stock.

We do not intend to declare and pay dividends on our capital stock for the foreseeable future. We currently intend to invest our future earnings, if any, to fund our growth. Additionally, the terms of our Loan Agreement restricts our ability to pay dividends. Therefore, you are not likely to receive any dividends on your common stock for the foreseeable future.

ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds

None.

ITEM 3. Defaults Upon Senior Securities

None.

ITEM 4. Mine Safety Disclosures

Not Applicable.

ITEM 5. Other Information

None.

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ITEM 6. Exhibits

(a) Exhibits

The following exhibits are filed with this current Report on Form 10-Q for the quarter ended March 30, 2012:

Exhibit Number	Description
10.1 +	Change in Control Severance Agreement dated as of March 1, 2011 by and between Ultra Clean Holdings, Inc. and Ginetto Addiego.
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of the Chief Executive Officer and the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Calculation Linkbase Document
101.LAB	XBRL Taxonomy Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

+ Indicates a management contract or compensatory plan.

27

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.

	ULTRA CLEAN HOLDINGS, INC.
	(Registrant)
Date: May 7, 2012
	By:	/s/    CLARENCE L. GRANGER
	Name:	Clarence L. Granger
	Title:	Chairman and Chief Executive Officer (Principal Executive Officer and duly authorized signatory)
Date: May 7, 2012
	By:	/s/    KEVIN C. EICHLER
	Name:	Kevin C. Eichler
	Title:	Chief Financial Officer (Principal Financial Officer and duly authorized signatory)

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Exhibit Index

Exhibit Number	Description
10.1 +	Change in Control Severance Agreement dated as of March 1, 2011 by and between Ultra Clean Holdings, Inc. and Ginetto Addiego.
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of the Chief Executive Officer and the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XB RL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Calculation Linkbase Document
101.LAB	XBRL Taxonomy Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

+ Indicates a management contract or compensatory plan.

29

EX-10.1

Exhibit 10.1

CHANGE IN CONTROL SEVERANCE AGREEMENT

CHANGE IN CONTROL SEVERANCE AGREEMENT (“Agreement”), dated as of March 1, 2011 (the “Effective Date”) by and between Ultra Clean Holdings, Inc., a Delaware corporation (the “Company”, and Ginetto Addiego (“Employee”).

WHEREAS, the Company and the Employee wish to enter into an agreement specifying the benefits the Employee will receive in certain circumstances relating to a Change in Control of the Company in order to induce Employee to remain in the employ of the Company in event of the possibility of a Change in Control;

NOW THEREFORE, in consideration of the foregoing and of the mutual covenants and agreements of the parties set forth in this Agreement, and of other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound, agree as follows:

ARTICLE 1

TERM AND NATURE OF AGREEMENT; TERMINATION OF EMPLOYMENT AGREEMENT

Section 1.01 . Term. This Agreement shall be in force until the second anniversary of the Effective Date, and thereafter renew for automatic one year terms, unless the Company shall give the Employee written notice of termination at least 30 days before the expiration of the then current term provided that no Change in Control has occurred prior to such date. Notwithstanding the foregoing, this Agreement shall terminate (i) 12 months after a Change in Control (subject to satisfaction of any obligations hereunder as a result of a termination of employment prior to such expiration) and (ii) upon on any termination of employment prior to a Change in Control.

Section 1.02 . At-will Employment. Nothing in this Agreement shall change the at-will nature of Employee’s employment with the Company.

ARTICLE 2

CHANGE IN CONTROL TERMINATION

Section 2.01 . Severance Benefits.

(a) If upon, or within 12 months following, a Change in Control, Employee is terminated by the Company without Cause or Employee resigns for Good Reason, Employee shall be entitled to the following (“Change in Control Severance Benefits”), provided that Employee executes and lets become effective a release of claims in the form attached hereto as Exhibit A (the “Release”) within 45 days following the termination of employment:

(i) a lump sum cash payment equal to 150% of the sum of (x) Employee’s then-existing annual base salary and (y) the average annual cash

bonus as determined by the Company over the prior three years, which shall be paid as soon as administratively practicable after the date on which the Release becomes effective, and, in any event, no later than two and one-half (2 1/2) months after the end of the taxable year of the Employee in which the termination of employment occurs;

(ii) payment or reimbursement of health benefit continuation coverage under COBRA or otherwise from the termination date through the earlier of (A) 18 months following the termination date or (B) the date Employee becomes eligible for health benefits with another employer, which shall be paid no later than the month of such coverage, provided that if Employee is no longer eligible for COBRA continuation coverage, a lump sum payment calculated based on the monthly premiums immediately prior to the expiration of COBRA coverage; and

(iii) 100% of all of the Employee’s unvested and outstanding Equity Awards shall become vested.

(b) Definitions. For purposes of this Agreement, the following definitions shall have the following meanings:

(i) “Cause” shall exist if: (A) Employee is convicted of , or pleads guilty or no contest to, a criminal offense; (B) Employee engages in any act of fraud or dishonesty; (C) Employee breaches any agreement with the Company; (D) Employee commits any material violation of Company policy; or (E) Employee fails, refuses or neglects to perform the services required of Employee in his position at the Company.

(ii) “Change in Control” means the occurrence of any one or more of the following:

(A) the consummation of a merger or consolidation of the Company with or into any other entity (other than with any entity or group in which Executive has not less than a 5% beneficial interest) pursuant to which the holders of outstanding equity of the Company immediately prior to such merger or consolidation hold directly or indirectly 50% or less of the voting power of the equity securities of the surviving entity;

(B) the sale or other disposition of all or substantially all of the Company’s assets (other than to any entity or group in which Executive has not less than a 5% beneficial interest); or

(C) any acquisition by any person or persons (other than any entity or group in which Executive has not less than a 5% beneficial interest) of the beneficial ownership of more than 50% of the voting

2

power of the Company’s equity securities in a single transaction or series of related transactions; provided, however, that an underwritten public offering of the Company’s securities shall not be considered a Change in Control;

provided, however, that a transaction shall not constitute a Change in Control if its sole purpose is to change the state of the Company’s incorporation or to create a holding company that will be owned in substantially the same proportions by the persons who directly or indirectly held the Company’s securities immediately before such transaction.

(iii) “Good Reason” means:

(A) a reduction of Employee’s then existing annual base salary by more than 10% (other than in collection with an action affecting a majority of the executive officers of the Company);

(B) relocation of the principal place of Employee’s employment to a location that is more than 50 miles from the principal place of Employee’s employment immediately prior to the date of the Change in Control; or

(C) a material reduction in the Employee’s authority, duties or responsibilities after the Change in Control when compared to Employee’s authority, duties and responsibilities prior to the Change in Control;

provided that notwithstanding the foregoing, an Employee’s termination will not be for Good Reason unless the Employee (x) notifies the Company in writing of the existence of the condition which the Employee believes constitutes Good Reason within 60 days of the initial existence of such condition (which notice specifically identifies such condition), (y) gives the Company at least 10 days following the date on which the Company receives such notice (and prior to termination) in which to remedy the condition, and (z) if the Company does not remedy such condition within such period, actually terminates employment within 15 days after the expiration of such remedy period (and before the Company remedies such condition).

(iv) “Equity Awards” means all options to purchase shares of Company common stock as well as any and all other stock-based awards granted to the Employee, including but not limited to stock bonus awards, restricted stock, restricted stock units or stock appreciation rights, except for performance stock awards which remain subject to performance criteria as of the Effective Date.

Section 2.02. Resignation of Corporate Offices. In connection with any termination of employment following a Change in Control, Employee will resign

3

Employee’s office, if any, as a director, officer or trustee of the Company, its subsidiaries or affiliates and of any other corporation or trust of which Employee serves as such at the request of the Company, effective as of the date of termination of employment.

Section 2.03. Accrued Compensation and Benefits. In connection with any termination of employment upon or following a Change in Control (whether or not under Section 2.01 above), the Company shall pay Employee’s earned but unpaid base salary and other vested but unpaid cash entitlements for the period through and including the termination of employment, including unused earned vacation pay and unreimbursed documented business expenses incurred by Employee prior to the date of termination (collectively “Accrued Compensation and Expenses”), as required by law and the applicable Company plan or policy. In addition, Employee shall be entitled to any other vested benefits earned by Employee for the period through and including the termination date of Employee’s employment under any other employee benefit plans and arrangements maintained by the Company, in accordance with the terms of such plans and arrangements, except as modified herein (collectively “Accrued Benefits”). Any Accrued Compensation and Expenses to which the Employee is entitled shall be paid to the Employee in cash as soon as administratively practicable after the termination, and, in any event, no later than two and one-half (2-1/2) months after the end of the taxable year of the Employee in which the termination occurs. Any Accrued Benefits to which the Employee is entitled shall be paid to the Employee as provided in the relevant plans and arrangement.

Section 2.04. Continuing Obligations. Employee acknowledges his or her continuing obligations under the Confidential and Non-Disclosure Agreement with the Company, including but not limited to Employee’s obligations not to use or disclose, at any time, any trade secret, confidential or proprietary information of the Company.

Section 2.05. Limitation on Payments.

(a) If the Change in Control Severance Benefits together with any other payment or benefit Employee would receive pursuant to a Change in Control (collectively, “Payment”) would (i) constitute a “parachute payment” within the meaning of Section 280G of the Internal Revenue Code of 1986, as amended (the “Code”), and (ii) but for this sentence, be subject to the excise tax imposed by Section 4999 of the Code (the “Excise Tax”), then such Payment shall be equal to the Reduced Amount. The “Reduced Amount” shall be either (x) the largest portion of the Payment that would result in no portion of the Payment being subject to the Excise Tax or (y) the largest portion, up to and including the total, of the Payment, whichever amount, after taking into account all applicable federal, state and local employment taxes, income taxes, and the Excise Tax (all computed at the highest applicable marginal rate), results in Employee’s receipt, on an after-tax basis, of the greater amount of the Payment notwithstanding that all or some portion of the Payment maybe subject to the Excise Tax. If a reduction in payments or benefits constituting “parachute payments” is necessary so that the Payment equals the Reduced Amount, reduction shall occur in the following order unless

4

Employee elects in writing a different order: reduction of cash payments; cancellation of acceleration of vesting; reduction of employee benefits. In the event that acceleration of vesting is to be reduced, it shall be cancelled in the reverse order of the date of grant of the Equity Awards unless Employee elects in writing a different order for cancellation.

(b) The Company may engage the accounting firm engaged by the Company for general audit purposes as of the day prior to the effective date of the Change in Control or another firm to perform the foregoing calculations. The Company shall bear all expenses with respect to the determinations by such firm required to be made hereunder.

(c) The accounting firm engaged to make the determinations hereunder shall provide its calculations, together with detailed supporting documentation, to Employee and the Company within fifteen (15) calendar days after the date on which Employee’s right to a Payment is triggered (if requested at that time by Employee or the Company) or such other time as requested by Employee or the Company.

ARTICLE 3

MISCELLANEOUS

Section 3.01. Assignment; Successors and Assigns. This Agreement shall inure to the benefit of and be enforceable by Employee’s personal or legal representatives, executors, administrators, successors, heirs, distributees, devisees, and legatees. If Employee should die or become subject to a permanent disability while any amount is owed but unpaid to Employee hereunder, all such amounts, unless otherwise provided herein, shall be paid to Employee’s devisee, legatee, legal guardian or other designee, or if there is no such designee, to Employee’s estate. Employee’s rights hereunder shall not otherwise be assignable. This Agreement shall be binding on the Company’s successors and assigns.

Section 3.02. Dispute Resolution. To ensure rapid and economical resolution of any and all disputes that might arise in connection with this Agreement, Employee and the Company agree that any and all disputes, claims, and causes of action, in law or equity, arising from or relating to this Agreement or its enforcement, performance, breach, or interpretation, will be resolved solely and exclusively by final, binding, and confidential arbitration, by a single arbitrator, in San Francisco, California, and conducted by Judicial Arbitration & Mediation Services, Inc. (“JAMS”) under its then existing employment rules and procedures. Nothing in this section, however, is intended to prevent either party from obtaining injunctive relief in court to prevent irreparable harm pending the conclusion of any such arbitration. Each party to an arbitration or litigation hereunder shall be responsible for the payment of its own attorneys’ fees.

Section 3.03. Unfunded Agreement. The obligations of the Company under this Agreement represent an unsecured, unfunded promise to pay benefits to Employee and/or Employee’s beneficiaries, and shall not entitle Employee or such beneficiaries to a preferential claim to any asset of the Company.

5

Section 3.04. Non-exclusivity of Benefits. Unless specifically provided herein, neither the provisions of this Agreement nor the benefits provided hereunder shall reduce any amounts otherwise payable, or in any way diminish Employee’s rights as an employee of the Company, whether existing now or hereafter, under any compensation and/or benefit plans (qualified or nonqualified), programs, policies, or practices provided by the Company, for which Employee may qualify; provided that the Change in Control Severance Benefits shall not be duplicative of any severance benefits under any such plans, programs, policies or practices. Vested benefits or other amounts which Employee is otherwise entitled to receive under any plan, policy, practice, or program of the Company (i.e., including, but not limited to, vested benefits under any qualified or nonqualified retirement plan), at or subsequent to the termination date shall be payable in accordance with such plan., policy, practice, or program except as expressly modified by this Agreement.

Section 3.05. Mitigation. In no event shall Employee be obligated to seek other employment or take any other action by way of mitigation of the amounts payable to Employee under any of the provisions of this Agreement nor shall the amount of any payment or benefit hereunder be reduced by any compensation earned by Employee as a result of employment by another employer.

Section 3.06. Entire Agreement. This Agreement represents the entire agreement between Employee and the Company and its affiliates with respect to Employee’s severance rights in a Change in Control situation, and supersedes all prior and contemporaneous discussions, negotiations, and agreements concerning such rights, provided, however, that any amounts payable to Employee hereunder shall be reduced by any amounts paid to Employee as required by any applicable federal, state or local law (including without limitation the WARN Act) in connection with any termination of Employee’s employment.

Section 3.07. Tax Withholding. Notwithstanding anything in this Agreement to the contrary, the Company shall withhold from any amounts payable under this Agreement all federal, state, city, or other taxes as are legally required to be withheld.

Section 3.08. Waiver of Rights. The waiver by either party of a breach of any provision of this Agreement shall not operate or be construed as a continuing waiver or as a consent to or waiver of any subsequent breach hereof.

Section 3.09. Severability. In the event any provision of the Agreement shall be held illegal or invalid for any reason, the illegality or invalidity shall not affect the remaining parts of the Agreement, and the Agreement shall be construed and enforced as if the illegal or invalid provision had not been included.

6

Section 3.10. Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of California without reference to principles of conflict of laws.

Section 3.11. Counterparts. This Agreement may be signed in several counterparts, each of which shall be an original, with the same effect as if the signatures thereto and hereto were on the same instrument.

Section 3.12. Code Section 409A. This Agreement and the payments and benefits hereunder are intended to qualify for the short-term deferral exception to Section 409A of the Code, and all regulations, rulings and other guidance issued thereunder, all as amended and in effect from time to time (“Section 409A”), described in Treasury Regulation Section 1.409A-l(b)(4) to the maximum extent possible, and to the extent they do not so qualify, they are intended to qualify for the involuntary separation pay plan exception to Section 409A described in Treasury Regulation Section 1.409A-l(b)(9)(iii) to the maximum extent possible. To the extent Section 409A is applicable to this Agreement, this Agreement is intended to comply with Section 409A. Without limiting the generality of the foregoing, if on the date of termination of employment Employee is a “specified employee” within the meaning of Section 409A as determined in accordance with the Company’s procedures for making such determination, to the extent required in order to comply with Section 409A, amounts that would otherwise be payable under this Agreement during the six-month period immediately following the termination date shall instead be paid on the first business day after the date that is six months following the termination date. All references herein to “termination date” or “termination of employment” shall mean separation from service as an employee within the meaning of Section 409A.

IN WITNESS WHEREOF, the Company and the Employee have executed this Agreement, to be effective as of the date and year first written above.

ULTRA CLEAN HOLDING, INC.
By:	/s/ Clarence Granger
	Name: Clarence Granger
	Title: Chief Executive Officer
EMPLOYEE:
/s/ Ginetto Addiego

7

Exhibit A-Form of Release

Reference is made in this Release (the “Release”) to the terms set forth in the Change in Control Severance Agreement dated (            ) (the “Agreement”) between Ultra Clean Holdings, Inc. (together with its successors and assigns, the “Company”) and the undersigned Ginetto Addiego (“Employee”).

1. Release. In consideration for the benefits outlined in the Agreement (the “Severance Benefits”), to which I am not otherwise entitled, I hereby generally and completely release the Company and its affiliated entities (collectively “Company Entities”) and their directors, officers, employees, shareholders, partners, agents, attorneys, predecessors, successors, parent and subsidiary entities, insurers, affiliates, and assigns from any and all claims, liabilities and obligations, both known and unknown, that arise out of or are in any way related to events, acts, conduct or omissions occurring prior to the time I sign this Release. This general release includes, but is not limited to: (1) all claims arising out of or in any way related to my employment with the Company or the termination of that employment; (2) all claims related to my compensation or benefits from the Company, including salary, bonuses, commissions, vacation pay, expense reimbursements, severance pay, fringe benefits, stock, stock options, or any other ownership interests in the Company; (3) all claims for breach of contract, wrongful termination or breach of the implied covenant of good faith and fair dealing; (4) all tort claims, including claims for fraud, defamation, emotional distress, and discharge in violation of public policy; and (5) all federal, state, and local statutory claims, including claims for discrimination, harassment, retaliation, attorneys’ fees, or other claims arising under the federal Civil Rights Act of 1964 (as amended), the federal Americans with Disabilities Act of 1990, the federal Age Discrimination in Employment Act of 1967 (as amended) (“ADEA”), or the California Fair Employment and Housing Act (as amended). This Release does not apply to (x) claims which cannot be released as a matter of law, (y) any right I may have to enforce the Agreement or (z) my eligibility for indemnification in accordance with applicable laws, the charter and bylaws of the Company or any indemnification agreement I have with the company.

2. ADEA Waiver. I acknowledge that I am knowingly and voluntarily waiving and releasing any rights you have under the ADEA and that the consideration given for the waiver and release is in addition to anything of value to which I was already entitled. I further acknowledge that I have been advised by this writing, as required by the ADEA, that:

(a) my waiver and release specified in this paragraph do not apply to any rights or claims that arise after the date I sign this Release;

(b) I have the right to consult with an attorney prior to signing this Release;

(c) I have 45 days to consider this Release (although I may choose voluntarily to sign this Release earlier);

(d) I have seven (7) days after I sign this Release to revoke the Release; and

(e) this Release will not be effective until the date on which the revocation period has expired, which will be the eighth day after I sign this Release, assuming I have returned it to the Company by such date.

3. Waiver of Unknown Claims. In granting the general release herein, I acknowledge that I have read and understand California Civil Code section 1542, which states:

A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS WHICH THE CREDITOR DOES NOT KNOW OR SUSPECT TO EXIST IN HIS FAVOR AT THE TIME OF EXECUTING THE RELEASE, WHICH IF KNOWN BY HIM MUST HAVE MATERIALLY AFFECTED HIS SETTLEMENT WITH THE DEBTOR.

I expressly waive and relinquish all rights and benefits under that section and any law of any jurisdiction of similar effect.

This Release, together with the Agreement, constitutes the entire understanding of the parties on the subjects covered.

EMPLOYEE:

A-2

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Clarence L. Granger, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Ultra Clean Holdings, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 7, 2012

/s/ CLARENCE L. GRANGER

Clarence L. Granger

Chairman and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Kevin C. Eichler, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Ultra Clean Holdings, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 7, 2012

/s/ KEVIN C. EICHLER

Kevin C. Eichler

Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The certification set forth below is being submitted in connection with the Quarterly Report on Form 10-Q (the “Report”) of Ultra Clean Holdings, Inc. (the “Company”) for the purpose of complying with Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 (the “Exchange Act”) and Section 1350 of Chapter 63 of Title 18 of the United States Code.

Clarence L. Granger, the Chief Executive Officer and Kevin C. Eichler, the Chief Financial Officer of the Company, each certifies that, to the best of his knowledge:

(1) the Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

Date: May 7, 2012

/s/ CLARENCE L. GRANGER

Clarence L. Granger

Chairman and Chief Executive Officer

Date: May 7, 2012

/s/ KEVIN C. EICHLER

Kevin C. Eichler

Chief Financial Officer

XML

Income Tax

3 Months Ended

Mar. 30, 2012

Income Tax [Abstract]

Income Tax

4. Income Tax

The Company's income tax provision and related effective tax rate for the three month period ended March 30, 2012 was $1,502,000 and 24.4%, respectively. The Company's income tax provision and related effective tax rate for the three month period ended April 1, 2011 was $1,999,000 and 25.6%, respectively. The change in respective rates reflects, primarily, changes in the geographic mix of worldwide earnings and financial results for the first quarter of 2012 compared to the same period in 2011.

The following table summarizes the activity related to the Company's uncertain tax positions (in thousands):

	Three months ended
	March 30, 2012		April 1, 2011
Balance as of the beginning of period	$	132	$	39
Increases related to prior year tax positions		5		—
Balance as of the end of period	$	137	$	39

The determination of the Company's tax provision is subject to judgments and estimates. The carrying value of the Company's net deferred tax assets, which is made up primarily of tax deductions, assumes the Company will be able to generate sufficient future income to fully realize these deductions. In determining whether the realization of these deferred tax assets may be impaired, the Company makes judgments with respect to whether it is likely to generate sufficient future taxable income to realize these assets. In addition, the calculation of tax liabilities involves significant judgment in estimating the impact of uncertainties in the application of complex tax laws. Resolution of uncertainties in a manner inconsistent with the Company's expectations could have a material impact on its results of operations and financial position.

As of March 30, 2012, the Company maintained a full valuation allowance on one of its China subsidiaries in the amount of $441,000 as the Company believes it is more likely than not that the deferred tax asset will not be realized. In order to reverse a valuation allowance, U.S. GAAP guidance requires the Company to review its cumulative twelve-quarter income/loss as well as its ability to generate sufficient future taxable income to realize the Company's net deferred tax assets. During the quarter ended March 30, 2012, the Company conducted a review of this subsidiary, as well as its other worldwide subsidiaries, and determined that the valuation allowance on its consolidated deferred tax assets is adequate.

The Company files income tax returns in the U.S. federal jurisdiction, various states and foreign jurisdictions. The Company's 2008 through 2011 federal income tax returns are open to audit through the statute of limitations by the Internal Revenue Service. The Company's 2007 through 2011 state income tax returns are open to audit by the California Franchise Tax Board. The Company is also subject to examination in various other jurisdictions for various periods. The Company's federal returns are still open for fiscal years 2004 through 2007 due to the carryback of losses for these years.

The Company is currently experiencing a tax holiday related to its Singapore subsidiary that will expire for tax years beginning January 2015. The Company's Singapore subsidiary recorded a net profit for the quarter ended March 30, 2012.

Undistributed earnings of the Company's foreign subsidiaries at March 30, 2012, are considered to be indefinitely reinvested and no provision for U.S. income taxes has been provided thereon. Upon distribution of those earnings in the form of dividends or otherwise, the Company would be subject to U.S. income taxes. It is not practicable to determine the income tax liability that might be incurred if these earnings were to be distributed.

Sales, use and value-added taxes receivable and payable are recorded on a net basis by jurisdiction. Subsequent to the issuance of the April 1, 2011 consolidated financial statements, management determined that certain of these receivables and payables had previously been recorded on a gross basis. Accordingly, the amounts previously reported as of April 1, 2011 and December 31, 2010, have been corrected to be reported on a net basis. Accrued liabilities were reduced by $3.5 million and $2.7 million, respectively as of April 1, 2011 and December 31, 2010 from $5.3 and $3.2 million as previously reported to $1.8 and $0.5 million, respectively. Prepaid and other current assets were reduced by $3.5 and $2.7 million as of April 1, 2011 and December 31, 2010 from $7.1 and $5.9 million as previously reported to $3.6 and $3.2 million, respectively. Additionally, the consolidated statement of cash flows for the quarter ended April 1, 2011 has been corrected, within cash flows from operating activities, to report a change in prepaid expenses and other current assets of $0.4 million rather than a change of $1.2 million as previously reported, and a change in accrued liabilities of $(1.8) million rather than a change of $2.6 million as previously reported. These corrections had no effect on the Company's previously reported stockholders' equity, net loss, net cash provided by operations.

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Borrowing Arrangements

3 Months Ended

Mar. 30, 2012

Borrowing Arrangements [Abstract]

Borrowing Arrangements

3. Borrowing Arrangements

The Company has borrowing arrangements with its banking facility under its Loan and Security Agreement with Silicon Valley Bank (the "Loan Agreement") which includes a $25.0 million revolving credit facility and one term loan. The aggregate amount of the revolving credit facility, which matures on December 31, 2013, is subject to a borrowing base equal to 80% of eligible accounts receivable and 45% of eligible inventory (total eligible inventory not to exceed $3.5 million) and is secured by substantially all of the Company's assets. The revolving credit facility bears interest per annum at a variable rate equal to the greater of prime rate, as defined in the Loan Agreement, plus a margin of 25 basis points. The interest rate at March 30, 2012, on the revolving credit facility was 3.5%. The revolving credit facility contains certain reporting and financial covenants that must be met on a quarterly basis in order for the Company to remain in compliance. The Company was in compliance with all of its bank covenants as of March 30, 2012. The revolving credit facility balance as of March 30, 2012 was $19.5 million.

As of March 30, 2012, the Company had one term loan with its banking facility for $8.0 million, which matures on October 21, 2013. The term loan bears interest per annum at a variable rate equal to the greater of prime rate, as defined per the loan agreement, plus a margin of 75 basis points. During the first quarter ended and as of March 30, 2012, the interest rate on the outstanding term loan was 4.0%. The balance of the term loan as of March 30, 2012, was $4.3 million.

Total debt outstanding as of March 30, 2012, was $23.8 million.

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Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 30, 2012	Dec. 30, 2011
ASSETS
Cash and cash equivalents	$ 54,770	$ 52,155
Accounts receivable, net of allowance of $5 and $5, respectively	48,974	41,051
Inventory	60,998	55,473
Prepaid expenses and other	4,767	5,441
Total current assets	169,509	154,120
Equipment and leasehold improvements, net	9,518	10,009
Purchased intangibles, net	8,987	8,987
Other non-current assets	5,186	5,183
Total assets	193,200	178,299
LIABILITIES AND STOCKHOLDERS' EQUITY
Bank borrowings	2,708	2,931
Accounts payable	39,050	29,451
Accrued compensation and related benefits	2,968	2,803
Deferred rent, current portion	926	895
Other current liabilities	1,324	662
Total current liabilities	46,976	36,742
Long-term debt	21,115	21,802
Deferred rent and other liabilities	2,244	2,470
Total liabilities	70,335	61,014
Commitments and contingencies (See note 6)
Stockholders' equity:
Preferred stock - $0.001 par value, 10,000,000 authorized; none outstanding
Common stock - $0.001 par value, 90,000,000 authorized; 23,270,712 and 22,910,649 shares issued and outstanding, in 2012 and 2011, respectively	109,932	108,838
Common shares held in treasury, at cost, 601,944 shares in 2012 and 2011	(3,337)	(3,337)
Accumulated other comprehensive loss	(174)
Retained earnings	16,444	11,784
Total stockholders' equity	122,865	117,285
Total liabilities and stockholders' equity	$ 193,200	$ 178,299

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Organization, Basis Of Presentation And Significant Accounting Policies

3 Months Ended

Mar. 30, 2012

Organization, Basis Of Presentation And Significant Accounting Policies [Abstract]

Organization, Basis Of Presentation And Significant Accounting Policies

1. Organization, Basis of Presentation and Significant Accounting Policies

Organization — Ultra Clean Holdings, Inc. (the "Company") is a leading developer and supplier of critical subsystems, primarily for the semiconductor capital equipment industry. The Company also leverages the specialized skill sets required to support semiconductor capital equipment to serve the technologically similar markets in the flat panel, medical, energy and research industries, collectively referred to as "Other Addressed Industries". The Company develops, designs, prototypes, engineers, manufactures and tests subsystems which are highly specialized and tailored to specific steps in the semiconductor manufacturing process as well as the manufacturing processes in Other Addressed Industries. Revenue is derived from the sale of gas delivery systems and other critical subsystems including chemical mechanical planarization (CMP) subsystems, chemical delivery modules, top-plate assemblies, frame assemblies, process modules and other high level assemblies.

The Company's customers are primarily original equipment manufacturers (OEMs) in industries it supports, providing customers complete subsystem solutions that combine the Company's expertise in design, test, component characterization and highly flexible manufacturing operations with quality control and financial stability. This combination helps the Company to drive down total manufacturing costs, reduce design-to-delivery cycle times and maintain high quality standards for our customers. The Company believes these characteristics, as well as the Company's standing as a leading supplier of gas delivery systems and other critical subsystems, place the Company in a strong position to benefit from the demand for subsystem outsourcing.

Basis of Presentation — The unaudited condensed consolidated financial statements included in this quarterly report on Form 10-Q include the accounts of the Company and its wholly-owned subsidiaries and have been prepared in accordance with generally accepted accounting principles in the United States of America ("GAAP"). This financial information reflects all adjustments which are, in the opinion of the Company, normal, recurring and necessary to present fairly the statements of financial position, results of operations and cash flows for the dates and periods presented. The Company's December 30, 2011, balance sheet data was derived from audited financial statements as of that date.

The unaudited condensed consolidated financial statements should be read in conjunction with the Company's consolidated financial statements for the fiscal year ended December 30, 2011, included in its Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 21, 2012. The Company's results of operations for the three months ended March 30, 2012, are not necessarily indicative of the results to be expected for any future periods.

Principles of Consolidation — The Company's consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries and all intercompany accounts and transactions have been eliminated in consolidation.

Foreign Currency Translation — The Company has reviewed its non-U.S. subsidiaries (of which substantially all of its non-U.S. asset base resides in China) that operate in a local currency environment to determine their functional currency by examining how and in what currency each subsidiary generates cash through billings and cash receipts and how and in what currency the subsidiary expends cash through payment of its vendors and payment of its workforce. Also, these subsidiaries individual assets and liabilities that are primarily denominated in the local foreign currency are examined for their impact on the Company's cash flows. All have been determined to have the U.S. dollar as its functional currency All balance sheet accounts of these local functional currency subsidiaries are translated at the fiscal period-end exchange rate, and income and expense accounts are translated using average rates in effect for the period, except for costs related to those balance sheet items that are translated using historical exchange rates. The resulting translation adjustments are recorded as cumulative translation adjustments, and are a component of accumulated other comprehensive income (loss). Foreign currency transaction gains and losses are recorded in other income (expense), net.

Use of Accounting Estimates — The presentation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosures of contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates and judgments on historical experience and on various other assumptions that it believes are reasonable under the circumstances. However, future events are subject to change and the best estimates and judgments routinely require adjustment. Actual amounts may differ from those estimates.

Certain Significant Risks and Uncertainties — The Company operates in a dynamic industry and, accordingly, can be affected by a variety of factors. For example, any of the following areas could have a negative effect on the Company in terms of its future financial position, results of operations or cash flows: the general state of the U.S. and world economies, the highly cyclical nature of the industries the Company serves; the loss of any of a small number of customers; ability to obtain additional financing; pursuing acquisition opportunities; regulatory changes; fundamental changes in the technology underlying semiconductor, flat panel, solar and medical device manufacturing processes or manufacturing equipment; the hiring, training and retention of key employees; successful and timely completion of product design efforts; and new product design introductions by competitors.

Concentration of Credit Risk — Financial instruments which subject the Company to concentrations of credit risk consist principally of cash and cash equivalents and accounts receivable. The Company sells its products primarily to semiconductor capital equipment manufacturers in the United States. The Company performs credit evaluations of its customers' financial condition and generally requires no collateral.

Significant sales to customers — The Company had significant sales to two customers- Applied Materials, Inc. and Lam Research Corporation , each of which accounted for 10% or more of sales for the three months ended March 30, 2012 and April 1, 2011. Sales to each of these customers as a percentage of total sales were as follows:

	Three months ended
	March 30, 2012			April 1, 2011
Applied Materials, Inc. (1)		43.0	%		38.5	%
Lam Research Corporation (2)		32.1	%		30.6	%
Total		75.1	%		69.1	%

(1) In November 2011, Applied Materials Inc. completed the acquisition of Varian Semiconductor Equipment Associates, Inc., one of the Company's customers. The sales percentages for Applied Materials, Inc. for the three months ended March 30, 2012 include sales to Varian Semiconductor Equipment Associates, Inc. The sales percentages for Applied Materials, Inc. for the quarter ended April 1, 2011 have been restated to reflect the inclusion of sales to Varian Semiconductor Equipment Associates, Inc., for comparison purposes.

(2) Lam Research Corp. has announced that it has entered into a definitive merger agreement to acquire Novellus Systems, Inc., one of the Company's customers, in an all-stock transaction that is anticipated to close in the second quarter of 2012. The sales percentages for Lam Research Corp. do not include any sales to Novellus Systems, Inc.

These two customers' accounts receivable balances were individually greater than 10% of accounts receivable and, in the aggregate, represented approximately 76% and 69% of accounts receivable as of March 30, 2012 and December 30, 2011, respectively.

Fair Value of Financial Instruments — The Company's financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable and bank borrowings. The carrying value of these instruments approximates their fair value because of their short-term nature.

The accounting guidance for fair value measurements prioritizes the inputs used in measuring fair value in the following hierarchy:

Level 1 — Observable inputs, such as quoted prices in active markets,

Level 2 — inputs other than the quoted prices in active markets that are observable either directly or indirectly,

Level 3 — Unobservable inputs in which there is little or no market data, which requires the Company to develop its own assumptions.

The only financial asset or liability measured at fair value on a recurring basis is an overnight sweep account invested in money market funds with a carrying value and fair value of $34.0 million at March 30, 2012, which are valued based on Level 2 inputs.

Fiscal Year — The Company uses a 52-53 week fiscal year ending on the Friday nearest December 31. All references to quarters refer to fiscal quarters and all references to years refer to fiscal years.

Income Taxes — The Company utilizes the asset and liability method of accounting for income taxes, under which deferred taxes are determined based on the temporary differences between the financial statement and tax basis of assets and liabilities using tax rates expected to be in effect during the years in which the basis differences reverse. A valuation allowance is recorded when it is more likely than not that some of the deferred tax assets will not be realized.

Income tax positions must meet a more-likely-than-not recognition threshold to be recognized. Income tax positions that previously failed to meet the more-likely-than-not threshold are recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not threshold are derecognized in the first subsequent financial reporting period in which that threshold is no longer met. The Company recognizes potential accrued interest and penalties related to unrecognized tax benefits within the consolidated statements of income as income tax expense.

The determination of the Company's tax provision is subject to judgments and estimates. The carrying value of the Company's net deferred tax assets, which is made up primarily of tax deductions, assumes it will be able to generate sufficient future income to fully realize these deductions. In determining whether the realization of these deferred tax assets may be impaired, the Company makes judgments with respect to whether it is likely to generate sufficient future taxable income to realize these assets. The Company has a valuation allowance on the deferred tax assets of one of its China subsidiaries in the amount of $441,000.

The calculation of tax liabilities involves significant judgment in estimating the impact of uncertainties in the application of complex tax laws. Resolution of these uncertainties in a manner inconsistent with the Company's expectations could have a material impact on its results of operations and financial position. Management believes that it has adequately provided for any adjustments that may result from these examinations, however, the outcome of tax audits cannot be predicted with certainty.

Product Warranty — The Company provides a warranty on its products for a period of up to two years and provides for warranty costs at the time of sale based on historical activity. The determination of such provisions requires the Company to make estimates of product return rates and expected costs to repair or replace the products under warranty. If actual return rates and/or repair and replacement costs differ significantly from these estimates, adjustments to cost of sales may be required in future periods. Components of the reserve for warranty costs consisted of the following (in thousands):

	Three months ended
	March 30, 2012			April 1, 2011
Beginning balance	$	350		$	204
Additions related to sales		31			267
Warranty claims		(39	)		(212	)
Ending balance	$	342		$	259

Revenue Recognition — Product revenue is generally recorded upon shipment. In arrangements which specify title transfer upon delivery, revenue is not recognized until the product is delivered. The Company recognizes revenue when persuasive evidence of an arrangement exists, shipment has occurred, price is fixed or determinable and collectability is reasonably assured. If the Company has not substantially completed a product or fulfilled the terms of a sales agreement at the time of shipment, revenue recognition is deferred until fulfillment. The Company's standard arrangement for its customers includes a signed purchase order or contract, no right of return of delivered products and no customer acceptance provisions.

The Company assesses collectability based on the credit worthiness of the customer and past transaction history. The Company performs on-going credit evaluations of customers and generally does not require collateral from customers.

Research and Development Costs — Research and development costs are expensed as incurred.

Net Income (loss) per Share — Basic net income (loss) per share is computed by dividing net income (loss) by the weighted average number of shares outstanding for the period. Diluted net income (loss) per share is calculated by dividing net income (loss) by the weighted average number of common shares outstanding and common equivalent shares from dilutive stock options and restricted stock using the treasury stock method, except when such shares are anti-dilutive (see Note 5 to Condensed Consolidated Financial Statements).

Comprehensive Income (Loss) — The Company reports by major components and as a single total, the change in its net assets during the period from non-owner sources. Comprehensive income (loss) for all periods presented was the same as net income (loss).

Segments — The Financial Accounting Standards Board's (FASB) guidance regarding disclosure about segments in an enterprise and related information establishes standards for the reporting by public business enterprises of information about reportable segments, products and services, geographic areas, and major customers. The method for determining what information to report is based on the manner in which management organizes the reportable segments within the Company for making operational decisions and assessments of financial performance. The Company's chief operating decision-maker is considered to be the Chief Executive Officer. The Company operates in one reporting segment.

Stock-Based Compensation Expense

The Company maintains stock-based compensation plans which allow for the issuance of equity-based awards to executives and certain employees. These equity-based awards include stock options, restricted stock awards and restricted stock units which can be either time-based or performance-based. The Company also maintains an employee stock purchase plan that provides for the issuance of shares to all eligible employees of the Company at a discounted price.

Stock-based compensation expense includes compensation costs related to estimated fair values of stock options and awards granted. The estimated fair value of the Company's equity-based awards, net of expected forfeitures, is amortized over the awards' vesting period on a straight-line basis over a weighted average period of four years for stock options three years for restricted stock awards and will be adjusted for subsequent changes in estimated forfeitures and future option grants.

The Company applies the fair value recognition provisions based on the FASB's guidance regarding stock-based compensation. The exercise price of each stock option equals the market price of the Company's stock on the date of grant. The estimated fair value of the Company's equity-based awards, less expected forfeitures, is amortized over the awards' vesting periods on a straight-line basis over a weighted average period of four years and will be adjusted for subsequent changes in estimated forfeitures and future option grants. Most options are scheduled to vest over four years and expire no later than ten years from the grant date. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model. The determination of the fair value of share-based payment awards on the date of grant using an option-pricing model is affected by the Company's stock price as well as assumptions regarding a number of complex and subjective variables. These variables include the expected term of the awards; the Company's expected stock price volatility over the term of the awards, actual and projected employee stock option exercise behaviors, risk-free interest rate and expected dividends. The Company estimates the expected term of share-based awards granted based on the Company's historical option term experience. The Company estimates the volatility of its common stock based upon the Company's historical stock price volatility over the length of the expected term of the options. The Company bases the risk-free interest rate that it uses in the option valuation model on U.S. Treasury zero-coupon issues with remaining maturities similar to the expected term of the options. The Company does not anticipate paying any cash dividends in the foreseeable future and therefore uses an expected dividend yield of zero in the option valuation model. The Company is required to estimate forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from those estimates. The Company uses historical data to estimate pre-vesting option forfeitures and records share-based compensation expense only for those awards that are expected to vest. The Company also considers, each quarter, whether there have been any significant changes in facts and circumstances that would affect its forfeiture rate.

Stock Options

The following table summarizes information with respect to options granted, exercised and canceled in the quarter ended March 30, 2012 and outstanding at March 30, 2012:

	Number of Shares
Options outstanding at December 30, 2011		1,654,691
Granted		—
Exercised		(64,343	)
Canceled		(4,513	)
Options outstanding at March 30, 2012		1,585,835

There were no options granted by the Company during either of the quarters ended March 30, 2012 or April 1, 2011.

The weighted-average exercise price, aggregate intrinsic value and weighted average remaining contractual life of outstanding options as of March 30, 2012 were $6.75 per share, $3.7 million and 4.7 years, respectively. As of March 30, 2012, 1,395,172 options with a weighted-average exercise price of $7.43 per share, aggregate intrinsic value of $2.6 million and a weighted average remaining contractual life of 4.4 years were exercisable. The total unamortized expense of the Company's unvested options, net of forfeitures, as of March 30, 2012, was $0.2 million.

Employee Stock Purchase Plan

The Company also maintains an employee stock purchase plan ("ESPP") that provides for the issuance of shares to all eligible employees of the Company at a discounted price. Under the ESPP, substantially all employees may purchase the Company's common stock through payroll deductions at a price equal to 95 percent of the fair market value of the Company's stock at the end of each applicable purchase period.

Restricted Stock Units and Restricted Stock Awards

The Company grants Restricted Stock Units ("RSU's") to employees and Restricted Stock Awards ("RSA") to non-employee directors as part of the Company's long term equity compensation plan.

Restricted Stock Units — RSU's are granted to employees with a per share or unit purchase price of zero dollars and either have time based or performance based vesting. RSU's typically vest over three years, subject to the employee's continued service with the Company. For purposes of determining compensation expense related to these RSU's, the fair value is determined based on the closing market price of the Company's common stock on the date of award. The expected cost of the grant is reflected over the service period, and is reduced for estimated forfeitures. The Company granted 547,900 RSU's (including 110,375 performance stock units) during the quarter ended March 30, 2012, with a weighted average fair value of $8.21 per share and 443,500 RSU's (including 66,250 performance stock units) during the quarter ended April 1, 2011, with a weighted average fair value of $10.30 per share. During the quarter ended March 30, 2012, 29,668 vested shares were withheld for executive RSU tax payments, resulting in the net issuance of 50,916 shares. As of March 30, 2012, $8.6 million of stock-based compensation cost, net of forfeitures, related to RSU's remains to be amortized, of which substantially all is expected to be recognized over an estimated period of less than three years. As of March 30, 2012, a total of 1,362,745 RSU's remain outstanding with an aggregate intrinsic value of $10.3 million and a weighted average remaining contractual term of 1.6 years.

Restricted Stock Awards — During the second quarter ended July 1, 2011, the Company issued 30,000 shares of restricted stock awards to its non-employee directors. The total unamortized expense of the Company's unvested restricted stock awards as of March 30, 2012, was less than $0.1 million.

The following table summarizes the Company's restricted stock unit and restricted stock award activity for the three months ended March 30, 2012 (in thousands):

	Number of Shares
Unvested restricted stock units and restricted stock awards at December 30, 2011		1,167
Granted		548
Vested		(296	)
Forfeited		(28	)
Unvested restricted stock units and restricted stock awards at March 30, 2012		1,391

The following table shows the Company's stock-based compensation expense included in the condensed consolidated statements of operations (in thousands):

	Three months ended
	March 30, 2012			April 1, 2011
Cost of sales (1)	$	393		$	321
Research and development		79			79
Sales and marketing		94			121
General and administrative		686			481
		1,252			1,002
Income tax benefit		(305	)		(256	)
Total stock-based compensation expense	$	947		$	746

(1) As of March 30, 2012 and April 1, 2011, there were no stock-based compensation expenses capitalized in inventory.

Recently Issued Accounting Standards — In September 2011, the FASB issued authoritative guidance to allow entities to use a qualitative approach to test goodwill for impairment. This authoritative guidance permits an entity to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If it is concluded that this is the case, it is necessary to perform the two-step goodwill impairment test. Otherwise, the two-step goodwill impairment test is not required. This guidance is effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011 and earlier adoption is permitted. Currently, the implementation of this authoritative guidance would have no impact on the Company's financial position or results of operations.

In June 2011, the FASB issued authoritative guidance on the presentation of comprehensive income to require an entity to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. This authoritative guidance eliminates the option to present the components of other comprehensive income as part of the statement of equity. In December 2011, the requirement regarding the presentation of reclassification adjustments out of accumulated other comprehensive income was deferred indefinitely. The new guidance, except for the provision deferred, is effective for the Company in the first quarter of fiscal 2012. The implementation of this authoritative guidance changed only the presentation of comprehensive income and had no impact on the Company's financial position or results of operations.

In May 2011, the FASB issued authoritative guidance to provide a consistent definition of fair value and ensure that the fair value measurement and disclosure requirements are similar between U.S. GAAP and International Financial Reporting Standards. This authoritative guidance limits the highest-and-best-use measure to nonfinancial assets, permits certain financial assets and liabilities with offsetting positions in market or counterparty credit risks to be measured at a net basis, and provides guidance on the applicability of premiums and discounts. This authoritative guidance also expands the disclosures on Level 3 inputs by requiring quantitative disclosure of the unobservable inputs and assumptions, as well as description of the valuation processes and the sensitivity of the fair value to changes in unobservable inputs. The new guidance is effective for the Company in the first quarter of fiscal 2012. The implementation of this authoritative guidance did not have a material impact on the Company's financial position or results of operations.

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Balance Sheet Information (In Thousands)

3 Months Ended

Mar. 30, 2012

Balance Sheet Information (In Thousands) [Abstract]

Balance Sheet Information (In Thousands)

2. Balance Sheet Information (in thousands)

Inventory consisted of the following:

	March 30, 2012			December 30, 2011
Raw materials	$	45,240		$	42,976
Work in process		11,897			12,953
Finished goods		8,118			3,486
		65,255			59,415
Reserve for excess and obsolete		(4,257	)		(3,942	)
Total	$	60,998		$	55,473

Equipment and leasehold improvements, net, consisted of the following:

	March 30, 2012			December 30, 2011
Computer equipment and software	$	7,120		$	7,089
Furniture and fixtures		1,595			1,761
Machinery and equipment		8,872			9,282
Leasehold improvements		10,857			10,860
		28,444			28,992
Accumulated depreciation and amortization		(18,926	)		(18,983	)
Total	$	9,518		$	10,009

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 30, 2012	Dec. 30, 2011
Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance	$ 5	$ 5
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	23,270,712	22,910,649
Common stock, shares outstanding	23,270,712	22,910,649
Treasury stock, shares	601,944	601,944

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Document And Entity Information	3 Months Ended
	Mar. 30, 2012	Apr. 30, 2012
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 30, 2012
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2012
Entity Registrant Name	ULTRA CLEAN HOLDINGS INC
Entity Central Index Key	0001275014
Current Fiscal Year End Date	--12-28
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		23,285,290

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Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2012	Apr. 01, 2011
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Sales	$ 110,565	$ 126,719
Cost of goods sold	94,905	109,167
Gross profit	15,660	17,552
Operating expenses:
Research and development	1,406	1,605
Sales and marketing	1,744	2,057
General and administrative	6,243	5,703
Total operating expenses	9,393	9,365
Income from operations	6,267	8,187
Interest and other income (expense), net	(105)	(368)
Income before provision for income taxes	6,162	7,819
Income tax provision	1,502	1,999
Net income	$ 4,660	$ 5,820
Net income per share:
Basic	$ 0.20	$ 0.26
Diluted	$ 0.20	$ 0.25
Shares used in computing net income per share:
Basic	23,013	22,468
Diluted	23,688	23,516

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Segment Information

3 Months Ended

Mar. 30, 2012

Segment Information [Abstract]

Segment Information

7. Segment Information

The Company operates in one reportable segment and is engaged in the development, manufacture and supply of critical subsystems for the semiconductor capital equipment, flat panel, medical, energy and research industries. The nature of the Company's products and production processes as well as type of customers and distribution methods is consistent among all of the Company's products. The Company's foreign operations are conducted primarily through its wholly-owned subsidiary in China. The Company's principal markets include North America, Asia and, to a lesser degree, Europe. Sales by geographic area represent sales to unaffiliated customers.

All information on sales by geographic area is based upon the location to which the products were shipped. The following table sets forth revenue by geographic area (in thousands):

	Three months ended
	March 30, 2012		April 1, 2011
Sales
United States	$	81,987	$	109,809
Asia		28,484		15,899
Europe		93		1,011
Total	$	110,565	$	126,719

At March 30, 2012 and April 1, 2011, approximately $4.7 million and $4.3 million, respectively, of the Company's long-lived assets were located in Asia, and the remaining balances were located in the United States.

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Commitments And Contingencies

3 Months Ended

Mar. 30, 2012

Commitments And Contingencies [Abstract]

Commitments And Contingencies

6. Commitments and Contingencies

The Company had commitments to purchase inventory totaling approximately $42.6 million at March 30, 2012.

The Company also leases properties domestically in Hayward, California, Austin, Texas and South San Francisco, California and internationally in China and Singapore. The Company's total remaining future minimum lease payments as of March 30, 2012, over the remaining terms of these leases will be approximately $11.7 million.

From time to time, the Company is subject to various legal proceedings and claims, either asserted or unasserted, that arise in the ordinary course of business. Although the outcome of the various legal proceedings and claims cannot be predicted with certainty, the Company has not had a history of outcomes to date that have been material to the statement of operations and does not believe that any current proceedings or other claims will have a material effect on its consolidated financial condition or results of operations.

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Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2012	Apr. 01, 2011
Cash flows from operating activities:
Net income	$ 4,660	$ 5,820
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	705	639
Excess tax benefit from stock-based compensation		(601)
Stock-based compensation	1,252	1,002
Changes in assets and liabilities:
Accounts receivable, net of allowance	(7,923)	(3,413)
Inventory	(5,525)	(5,864)
Prepaid expenses and other	674	(398)
Other non-current assets	(3)	(21)
Accounts payable	9,425	2,782
Accrued compensation and related benefits	165	181
Other liabilities	469	1,753
Net cash provided by operating activities	3,899	1,880
Cash flows from investing activities:
Purchases of equipment and leasehold improvements	(214)	(1,154)
Net cash used in investing activities	(214)	(1,154)
Cash flows from financing activities:
Proceeds from revolving credit facility	19,482
Principal payments on revolving credit facility, term debt and capital lease obligations	(20,394)	(1,353)
Excess tax benefit from stock-based compensation		601
Employees' taxes paid upon vesting of restricted stock units	(251)
Proceeds from issuance of common stock	93	655
Net cash used in financing activities	(1,070)	(97)
Net increase in cash	2,615	629
Cash and cash equivalents at beginning of period	52,155	34,654
Cash and cash equivalents at end of period	54,770	35,283
Supplemental items:
Income taxes paid	94	350
Income tax refunds		(613)
Interest	130	335
Non-cash investing and financing activities:
Restricted stock issued	2,439	2,241
Fixed asset purchases included in accounts payable	$ 20	$ 25

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Net Income Per Share

3 Months Ended

Mar. 30, 2012

Net Income Per Share [Abstract]

Net Income Per Share

5. Net Income Per Share

Basic net income per share excludes dilution and is computed by dividing net income by the weighted average number of common shares outstanding for the period. Diluted net income per share reflects the potential dilution that would occur if outstanding securities or other contracts to issue common stock were exercised or converted into common stock.

The following is a reconciliation of the numerators and denominators used in computing basic and diluted net income per share (in thousands, except per share data):

	Three months ended
	March 30, 2012		April 1, 2011
Numerator:
Net income	$	4,660	$	5,820
Denominator:
Shares used in computation — basic:
Weighted average common shares outstanding		23,013		22,468
Shares used in computing basic net income per share		23,013		22,468
Shares used in computation — diluted:
Shares used in computing basic net income per share		23,013		22,468
Dilutive effect of common shares outstanding subject to repurchase		264		354
Dilutive effect of options outstanding		411		694
Shares used in computing diluted net income per share		23,688		23,516
Net income per share — basic	$	0.20	$	0.26
Net income per share — diluted	$	0.20	$	0.25

The Company had securities outstanding which could potentially dilute basic earnings per share in the future, but the incremental shares from the assumed exercise of these securities were excluded in the computation of diluted net income per share, as their effect would have been anti-dilutive. Such outstanding securities consisted of 548,138 and 323,276 stock options for the quarters ended March 30, 2012 and April 1, 2011, respectively.