MENLO PARK, CA, February 6, 2006 /PRNewswire —Ultra Clean Holdings, Inc. (Nasdaq: UCTT), a leading developer and supplier of critical subsystems for the semiconductor capital equipment industry, today reported its financial results for the fourth quarter and the full year ended December 31, 2005. Revenue for the fourth quarter of 2005 totaled $38.8 million, compared to revenue for the third quarter ended September 30, 2005 of $27.5 million, an increase of 40.8%, and compared to revenue of $41.3 million for the same period a year ago, a 6.2% decline. The company recorded net income of $686,000, or $0.04 per share during the fourth quarter of 2005, compared to a net loss of $566,000, or $0.03 per share for the third quarter of 2005 and net income of $2.1 million, or $0.13 per share for the same period a year ago. Gross margin for the fourth quarter of 2005 was 13.6% versus 9.3% for the third quarter of 2005 and 15.5% for the same period a year ago.

Net income reflects a $480,000 after tax charge for costs related to legal, accounting and consulting fees incurred in connection with  Ultra Clean’s evaluation of a potential acquisition for which negotiations were terminated during the fourth quarter of fiscal 2005. This charge reduced earnings per share by $0.03.

Revenue for the fiscal year 2005 was $147.5 million, down $36.7 million or 19.9% compared to revenue of $184.2 million for fiscal year 2004.  Net income for the fiscal year 2005 was $2.0 million or $0.12 per share compared with the fiscal year 2004 net income of $8.6 million or $0.55 per share.

Cash at the end of the fourth quarter of 2005 was $10.7 million, a decrease of $3.4 million from $14.1 million at the end of the third quarter of 2005, and a decrease of $700,000 from $11.4 million at the end of the fourth quarter of 2004.  
Clarence Granger, UCT’s President and Chief Executive Officer, commented on the fourth quarter results: "We are very pleased with UCT’s performance during the fourth quarter. The Company exceeded guidance with respect to revenues, and earnings per share was at the high end of the guidance range, despite the $0.03 per share charge associated with the termination of negotiations on a potential acquisition.  As importantly, we made significant progress during the fourth quarter on our two main strategic initiatives."

Granger continued: "During the fourth quarter, we increased revenue from products other than gas panel subsystems (including process modules, top plate and frame assemblies,  and chemical delivery systems) to $4.4 million or 11% of total revenue, from $2.4 million or 9% of total revenue in the quarter ending September 30, 2005.  We also increased revenue from products manufactured at our Shanghai facility to $4.7 million or 12% of total revenue, from $1.7 million or 6% of revenue in the prior quarter.  In both cases, we achieved the strategic objectives we set for ourselves at the beginning of last year."

Commenting on UCT’s corporate outlook, Granger noted, "We expect revenue for the first quarter of 2006 to increase to between $47 million and $51 million, and net income per share to increase to between $0.10 and $0.14 per share, inclusive of an expected $0.01 per share charge associated with the implementation of SFAS 123(R). We are well positioned to benefit from the current upturn in the broader semiconductor capital equipment industry and from the continued trend toward outsourcing on the part of our OEM customers."

Ultra Clean will conduct a conference call on Monday, February 6, 2006, beginning at 2:00 p.m. PDT at 888/882-0144 (domestic) and 415/908-6251 (international). A replay of the webcast will be available for fourteen days following the conference call at 800/633-8284 (domestic) and 402/977-9140 (international). The confirmation number for the live broadcast and replays is 21282733 (all callers). The conference call will also be webcast live and be available for fourteen days on our website.

About Ultra Clean Holdings, Inc.
Ultra Clean Holdings, Inc. is a developer and supplier of critical subsystems for the semiconductor capital equipment industry.  Ultra Clean offers its customers a complete outsourced solution for gas delivery systems and other subassemblies, improved design-to-delivery cycle times, component neutral design and manufacturing and component testing capabilities. Ultra Clean's customers are primarily original equipment manufacturers of semiconductor capital equipment. Ultra Clean is headquartered in Menlo Park, California. Additional information is available at www.uct.com.

Safe Harbor Statement
The foregoing information contains, or may be deemed to contain, "forward- looking statements" (as defined in the U.S. Private Securities Litigation Reform Act of 1995) which reflect our current views with respect to future events and financial performance. We use words such as "anticipates," "believes," "plan," "expect," "future,"' "intends," "may," "will," "should," "estimates," "predicts," "potential," "continue" and similar expressions to identify these forward-looking statements.  Forward looking statements included in the press release include estimates made with respect to our fourth quarter revenue and diluted earnings per share and purchase orders placed by a significant customer for the manufacture of entire process modules.  All forward-looking statements address matters that involve risks and uncertainties. Accordingly, our actual results may differ materially from the results predicted or implied by these forward- looking statements. These risks, uncertainties and other factors include, among others, those identified in "Risk Factors," "Management's Discussion and Analysis of Financial Condition and Results of Operations'' and elsewhere in our annual report on Form 10-K for the year ended December 31, 2004 filed with the Securities and Exchange Commission. Ultra Clean Holdings, Inc. undertakes no obligation to publicly update or review any forward-looking statements, whether as a result of new information, future developments or otherwise.