HAYWARD, Calif., April 28, 2026 /PRNewswire/ Ultra Clean Holdings, Inc. (Nasdaq: UCTT), today reported its financial results for the first quarter ended March 27, 2026.

“UCT delivered first quarter results above the midpoint of guidance, supported by demand across our customer base,” said James Xiao, CEO. “Our customers’ accelerated technology roadmaps give us confidence that we are in the early stages of a multi-year, AI driven expansion and we are executing with urgency to support them. Our focus on ramp-readiness and driving efficiencies across our global footprint positions us well to deliver sustained growth over the long-term.”

Total revenue was $533.7 million. Products contributed $465.7 million and Services added $68.0 million. Total gross margin was 15.8%, operating margin was 2.1%, and net loss was $(17.9) million or $(0.40) per diluted share. This compares to total revenue of $506.6 million, gross margin of 15.2%, operating margin of 2.2%, and net loss of $(3.3) million or $(0.07) per diluted share, in the prior quarter.

On a non-GAAP basis, gross margin was 16.5%, operating margin was 5.1%, and net income was $14.5 million or $0.31 per diluted share. This compares to gross margin of 16.1%, operating margin of 4.9%, and net income of $10.0 million or $0.22 per diluted share in the prior quarter.

The Company expects revenue in the range of $565 million to $605 million. The Company expects GAAP diluted net income per share to be between $0.20 and $0.36 and non-GAAP diluted net income per share to be between $0.44 and $0.60.

The call will take place at 1:45 p.m. PT and can be accessed by dialing 1-800-836-8184 or 1-646-357-8785. No passcode is required. A replay of the call will be available by dialing 1-888-660-6345 or 1-646-517-4150 and entering the confirmation code 90449#. The Webcast will be available on the Investor Relations section of the Company's website at http://uct.com/investors/events/.

Ultra Clean Holdings, Inc. is a leading developer and supplier of critical subsystems, components, parts, and ultra-high purity cleaning and analytical services, primarily for the semiconductor industry. Under its Products division, UCT offers its customers an integrated outsourced solution for major subassemblies, improved design-to-delivery cycle times, design for manufacturability, prototyping, and high-precision manufacturing. Under its Services Division, UCT offers its customers tool chamber parts cleaning and coating, as well as micro-contamination analytical services. Ultra Clean is headquartered in Hayward, California. Additional information is available at www.uct.com.

In addition to providing results that are determined in accordance with Generally Accepted Accounting Principles in the United States of America ("GAAP"), management uses non-GAAP gross margin, non-GAAP operating margin and non-GAAP net income to evaluate the Company's operating and financial results. We believe the presentation of non-GAAP results is useful to investors for analyzing our core business and business trends and comparing performance to prior periods, along with enhancing investors' ability to view the Company's results from management's perspective. The presentation of this additional information should not be considered a substitute for results prepared in accordance with GAAP. Tables presenting reconciliations from GAAP results to non-GAAP results are included at the end of this press release.

The Company defines non-GAAP net income as net loss before amortization of intangible assets, stock-based compensation, restructuring charges, fair value adjustments, debt refinancing costs, legal-related costs, unrealized loss (gain) on foreign exchange, and the tax effects of the foregoing adjustments.

A reconciliation of our guidance for non-GAAP net income per diluted share for the subsequent quarter is not available due to fluctuations in the geographic mix of our earnings from quarter to quarter, which impacts our tax rate and cannot be reasonably predicted or determined. As a result, such reconciliation is not available without unreasonable efforts and we are unable to determine the probable significance of the unavailable information.

The foregoing information contains, or may be deemed to contain, “forward-looking statements” (as defined in the US 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,” “projection,” “outlook,” “forecast,” “believes,” “plan,” “expect,” “future,” “intends,” “may,” “will,” “estimates,” “see,” “predicts,” “should” and similar expressions to identify these forward-looking statements. Forward looking statements included in this press release include our expectations about the semiconductor capital equipment market and outlook. All forward-looking statements address matters that involve risks and uncertainties. Accordingly, the Company’s actual results may differ materially from the results predicted or implied by these forward-looking statements. These risks, uncertainties and other factors also 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 26, 2025, as 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 unless required by law.

Rhonda Bennetto

SVP Investor Relations

rbennetto@uct.com