May 11, 2016

Investor PresentationJefferies Technology

Conference

Safe HarborThis presentation may contain forward-looking statements and management may make additional forward-looking statements in response to your questions. These statements are made under the ''safe harbor'' provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as “will,” “expects,” “anticipates,” “future,” “intends,” “plans,” “believes,” “estimates” and similar statements. Statements that are not historical facts, including statements concerning our beliefs, forecasts, estimates and expectations, are forward-looking statements. Forward-looking statements involve inherent risks and uncertainties that could cause actual results to differ materially from those projected or anticipated, including risks related to: the risk that our results of operations are cyclical and may fluctuate from period to period; the risk that we rely on a small number of customers for a significant portion of our revenue; the risk that the industries in which we participate are highly competitive and other risks outlined in our public filings with the Securities and Exchange Commission, including as set forth under “Risk Factors”, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and elsewhere in our most recent Quarterly Report on Form 10-Q and Annual Report on Form 10-K filed with the Securities and Exchange Commission. The forward-looking statements made in this presentation relate only to events or information as of the date on which the statements are made in this presentation. Except as required by law, we undertake no obligation to update or revise publicly any forward-looking statements, whether as a result of new information, future events or otherwise, after the date on which the statements are made or to reflect the occurrence of unanticipated events.

External Use2

Global leader in design, engineering and manufacturing of critical modules, subsystems and turnkey solutions primarily for the semiconductor capital equipment industry.

• Q1’16 revenue of $112M, a quarter-over-quarter increase of 8.5%– Q2’16 revenue guidance $123 – 128M and EPS* $0.05 – $0.08

• Continued recovery in Semiconductor Wafer Equipment spending– Industry commitment to node transitions in logic (10nm) and DRAM (≤20nm)

– Increased capital intensity in deposition and etch for FinFET and 3D NAND

• Building the platform for UCT’s growth– Strategic investment in capabilities to enable ramp of new business

– Streamlining business systems and processes

External Use3

UCT Highlights

* Pro forma earnings per share, adding back amortization.

External Use4

From Design to Prototype to Production

MANUFACTURING

INTEGRATION & TESTPROTOTYPING/ DEVELOPMENT

MANUFACTURINGENGINEERING

SUPPLY CHAIN MANAGEMENT

External Use5

From Design to Prototype to Production

Broad expertise in multiple areas− Complete outsourced design

• Gas and liquid delivery• Mechanical and electrical assemblies• Thermal management

− Quick turn capabilities

PROTOTYPING/ DEVELOPMENT

MANUFACTURINGENGINEERING MANUFACTURING

INTEGRATION & TEST

SUPPLY CHAIN MANAGEMENT

External Use6

From Design to Prototype to Production

Design for manufacturability (DFM)− Lower production costs− Reduced cycle time

Partner with customers to meet demanding new product requirements Continuous improvement in operational excellence

MANUFACTURING

INTEGRATION & TEST

MANUFACTURINGENGINEERING

PROTOTYPING/ DEVELOPMENT

SUPPLY CHAIN MANAGEMENT

External Use7

From Design to Prototype to Production

Network of global, strategic partners Reduce customer overhead through UCT expertise

in qualifying and managing complex supplier base− Aggregated buying power− Improved customer delivery time

PROTOTYPING/ DEVELOPMENT

MANUFACTURING

INTEGRATION & TEST

MANUFACTURINGENGINEERING

SUPPLY CHAIN MANAGEMENT

External Use8

From Design to Prototype to Production

Comprehensive new product introduction process− Simplify manufacturing process− Reduce manufacturing costs− Solve production challenges

Vertically integrated

MANUFACTURING

PROTOTYPING/ DEVELOPMENT INTEGRATION & TEST

MANUFACTURINGENGINEERING

SUPPLY CHAIN MANAGEMENT

External Use9

From Design to Prototype to Production

Sub-system through full tool integration− Electrical and mechanical assemblies − Ultra-high purity gas systems− Fluid delivery systems

Final test and shipment direct to end users− “Extended factory to top OEMs”

INTEGRATION & TESTPROTOTYPING/ DEVELOPMENT

MANUFACTURINGMANUFACTURING

ENGINEERING

SUPPLY CHAIN MANAGEMENT

OEM Component Suppliers

34%

OEM Integration In-Sourcing

44%

UCT5% Major Contract

Manufacturers11%

Other Contract Manufacturers

6%

External Use10

Semi Equipment Manufacturing Landscape

Source: UCT estimates.

External Use11

Why Outsource?

LOWER COST Provides variable cost model

SCALABILITY Gain ability to quickly scale manufacturing

OPERATIONAL FOCUS Access to expertise in manufacturing

SUPPLY CHAIN Ease of supply chain management

FINANCIAL FLEXIBILITY Achieve reduction of inventory, improved cash flow

External Use12

Why We Win

COMPLEX DESIGNS Track record of delivering highly complex Semi equipment and solutions

SCALABILITY Effectively manage variable volumes and dynamically changing designs

SUPPLY CHAIN Leader in Semi equipment supply chain

COST OF QUALITY Consistently deliver high quality precision products

FINANCIAL STRENGTH Strong balance sheet and flexible financial model

External Use13

Total WFE Market Opportunity

2016 WFE Estimate: $33B

Source: Gartner 2016 and UCT estimates

Thermal & Implant

5%

Deposition25%

Removal/Etch25%

Lithography26%

Metrology & Inspection

13%

Other6%

External Use14

UCT Target WFE Markets

2016 WFE Estimate: $33B

Source: Gartner 2016 and UCT estimates.

Addresses

55%of WFE Market

Thermal & Implant

5%Deposition

25%

Removal/Etch25%

Lithography26%

Metrology & Inspection

13%

Other6%

External Use

Total WFE Market OpportunityDeposition & Etch Outpace Semi Market

2016 WFE Estimate: $33B

Dep & Etch

>70%of UCT Semi

Sales

Dep & Etch CapEx Spend 9-10% CAGR 2013 - 2018

Total CapExSpend~6% CAGR 2013 - 2018

Thermal & Implant

5% Deposition25%

Removal/Etch 25%

Lithography26%

Metrology & Inspection

13%

Other6%

15 Source: Gartner 2015 and UCT estimates

External Use16

Growth StrategyIncreasing UCT Content on Platforms

Broaden CriticalProcess Capabilities

StrategicInvestments

Expand Customer Base

Deeper Engagementwith Existing Customers

Frames Machining Plastics

Prototype Machining

MachiningMetals

External Use17

Growing Suite of Critical Process Capabilities

Manufactured Components Chemical Delivery Sub-Systems

Frames

Prototype Machining

MachiningMetals

Machining Plastics

Heaters

Sheet Metal Forming

3D Printing

Complete Assemblies

GasGASAssembly

Integration & Test

Liquid

AssemblyIntegration

& Test

Liquid

Sheet Metal Forming

Heaters 3D Printing

External Use18

Semi Industry Consolidation

54% 63% 63%

TOP 10CHIP COMPANIES

TOP 5WFE COMPANIES

68%

2010 2015 2010 2015

Source: Company Financials, SIA, Gartner 2015 and UCT estimates

• Large number of small, highly specialized suppliers• Management of suppliers growing unwieldy given tech requirements• Sustainability of some suppliers• Short product cycles driving quality and delivery cost challenges

External Use19

Supply Chain Consolidation Opportunity

30%

TOP 10SUPPLIERS to WFE

35%

2010 2015

Source: Company financials, UCT estimates

External Use20

UCT Business Model

KEY DIFFERENTIATORS•Higher value capabilities• Improved operational efficiencies•Low capital requirements

OPERATING PROFIT DRIVERS• Revenue growth• Low operating expenses• Strategic acquisitions

GROSS MARGIN15% - 18%

Targeted

OPERATING MARGIN

8% - 10%

(in $ millions) Q2'15 Q3'15* Q4’15 Q1’16

Sales $117.5 $122.8 $103.4 $112.2

Gross Profit $18.8 $18.9 $13.3 $14.6

Gross Profit % 16.0% 15.4% 12.9% 13.0%

Operating Income/(Loss) $4.8 $5.1 ($0.5) $0.9

Operating Income/(Loss) % 4.1% 4.1% (0.5%) 0.8%

Cash $76.6 $59.8 $50.1 $45.5

Inventory $64.6 $75.6 $72.7 $82.0

Accounts Receivable $57.5 $57.5 $59.1 $66.7

External Use21

Select Financial Data

Pro forma financials adding back amortization. * Note: Q3'15 represents the first (partial) quarter of combined operations between UCT and Miconex. All prior quarters represent UCT operating results only

• Poised to outperform growth of Semi WFE market

• Targeting fastest growing market segments

• Delivering what customers need (OTD, quality, cost)

• Industry trends reinforce leading position as potential supply chain consolidator

• Becoming partner to key customers

External Use22

Compelling UCT Opportunity

WinningStrategy

Strong GrossMargins

Improving Profitability

Solid Cash Generation

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