Ultra Clean Announces Participation in Upcoming Conferences

HAYWARD, Calif., May 24, 2021 /PRNewswire/ -- Ultra Clean Holdings, Inc. (Nasdaq: UCTT), today announced its participation at three upcoming investor events:

• Wednesday June 2, 2021 - Craig-Hallum Institutional Investor Conference
• Thursday June 3, 2021 – Cowen Annual TMT Conference
• Tuesday June 8, 2021 – Stifel Virtual Cross Sector Insight Conference

The presentation webcast for the Stifel conference will take place at 2:40 pm ET and can be accessed at www.uct.com/English/investors/events-and-presentations shortly after the presentation.

About Ultra Clean Holdings, Inc.

Ultra Clean Holdings, Inc. is a leading developer and supplier of critical subsystems, components and 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.

Contact:Rhonda BennettoSVP Investor Relations(250) 370-9030[email protected]

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SOURCE Ultra Clean Holdings, Inc.