Summer 2019

CORPORATE PRESENTATION

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This 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, and those regarding our expected financial results 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

Non-GAAP

Management uses non-GAAP net income and non-GAAP net income per diluted share to evaluate the Company's operating and financial results. The Company believes 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 of non-GAAP results to U.S. GAAP results are included in the Appendix.

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Safe Harbor

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Capitalizing on opportunities in semi market: equipment manufacturing/parts cleaning & analysis

Vertically integrated model as a high value added supplier, creating high barriers to entry

Key customers (OEM & IDM) enabling organic growthopportunities

Recurring revenue driving financial stability & profitability

Accelerating share growth through acquisitions

Key Investment Messages

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Enabling Semiconductor Technology for Nearly 20 Years

Sustainable & profitable growth solving complex problems

2002 2006 2010 2014 2018

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Deep Culture of Increasing ValueHow did we get here?

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AUGUST, 2015Bolstered position in the chemical delivery market; augmented capabilities for wet clean and CMP subsystems

FEBRUARY, 2015Facilitated vertical integration in chemical and gas deliveryJULY, 2012

Added to customer base and expanded manufacturing capabilities

SEPTEMBER, 2018Added wafer fab start recurring revenue stream by entering the cleaning and analytic space

APRIL, 2019Added weldment capabilities, increasing leading position and competitive edge with global scale

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Inorganic Growth Strategy

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Fragmented Supply Chain

Focus on Semi Industry

Complements Current Business

Geographic Synergies

Strong Financial Model

Opportunity for Growth

Acquire

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Our Future: Technology-Intensive End Markets

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INTERNET OF THINGSnetworking/connectivity of physical devices from anywhere to exchange data

MACHINE LEARNINGcomputer systems able to perform tasks normally done by humans

AUTONOMOUS VEHICLESvehicles capable of sensing their environment/moving with little/no human input

BIG DATABringing speed/efficiency to collection/analytics of data for smarter decisions

UCT is the partner of choice enabling customers’ roadmaps

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Semiconductor Market Opportunity

Company adaptation of Gartner Semiconductor Wafer Fab Equipment (Including Wafer-Level Packaging), Worldwide, Forecast 3Q18 Update & UCT estimates

OEMs

Fabs

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INTEGRATION & TEST

MANUFACTURING

Full Spectrum Outsourcing Partner

SUPPLY CHAIN MANAGEMENT

Design for manufacturability

(DFM)

Partnering with customers onnew products

Global network of strategic

suppliers

Comprehensive new product introduction

process

Subsystem through full

tool integration

MANUFACTURINGENGINEERING

PROTOTYPING/ DEVELOPMENT

Highly integrated, one-stop, full spectrum

solution for semi customers

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CLEANING& ANALYSIS

Tool chamber parts cleaning and coating, microcontamination

analytical services

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GAS DELIVERY

METALS MACHINING

FRAMESSHEET METAL FORMING

THERMAL PRODUCTS

PLASTICS MACHINING

FLUID DELIVERY

Critical Value-Added Broad Capabilities

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PROTOTYPE MACHINING

SEMICONDUCTOR PRODUCTS & SOLUTIONS

ASSEMBLY INTEGRATION & TEST

PARTS CLEANING & COATING

VALIDATION

SEMICONDUCTOR SERVICES

One-stop for products, solutions and services across the semi value chain

SEMICONDUCTOR PRODUCTS & SOLUTIONS

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Semiconductor Products & Solutions

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FACTORYINTERFACE

GASPANEL

PROCESSCHAMBER TRANSFER

CHAMBER

UCT’s solutions provide avenues for organic market expansion

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DEPOSITION

ETCH

LITHOGRAPHY

PACKAGE & TEST

IMPLANT

CMP

PHOTORESIST

Supplier of Critical Elements of the Semiconductor Manufacturing Process

PREP FRONT-END PROCESSING BACK-END PROCESSING

SEMI MANUFACTURING PROCESS

CORE UCT MARKETS

ADDITIONAL UCT MARKETS

CERTAIN STEPSREPEATED20X – 30X

Source: Company Information.

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INGOT

SLICING

POLISHING

EPITAXIAL

ANNEAL

INSPECTION

WAFER CLEAN

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SEMICONDUCTOR SERVICES BUSINESS

▪ Parts Cleaning & Coating– 17 Advance Technology Cleaning

Centers close to customers

– New equipment cleaning and ongoing service contracts

– Onsite logistics and support

▪ Recurring revenue stream

▪ Growth Drivers– Increase leadership in cleaning of

advanced sub-14nm process parts

– Penetrate top Tier IDM’s and OEM’s

– Advantage: total wafer starts vs WFE capital equipment spend

Semiconductor Services Business - QuantumClean

DIFFUSION ETCHINGCHEMICAL VAPOR DEPOSITION

PHYSICAL VAPOR DEPOSITION

ATOMIC LAYER DEPOSITION LITHOGRAPHY IMPLANT SUBFAB

BEFORE & AFTER CLEAN

Source: Company information.

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▪ Primary customers engage with global suppliers

▪ Large number of regional players serve ~72% of market

– Leading position with opportunity to consolidate

QuantumClean Advantaged Position

Source: QGT Management estimates.

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CCR + Analytical Lab Services Market*

2018

Top 4 IDM 54%

Top 3 OEM 28%

Top 2 Foundries 4%

All Other 13%

14%6%

5%

3%72%

Competitor A

Competitor C

Competitor B

Others (~90 companies)

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Semiconductor Industry Outlook - Cleaning

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Source: Chart created by UCT based on Gartner research. Source: Semiconductor Wafer Fab Capacity, Worldwide Report, Bob Johnson, November 2018

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

2013 2014 2015 2016 2017 2018 2019 2020 2021 2022

An

nu

al C

apac

ity

(MSI

)

≤10nm 14nm 28-20nm 45-32nm 90-65nm ≥130nm

Installed CapacityMillions of Square Inches (MSI

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▪ Four micro-contamination analytical laboratories

▪ Highly qualified chemists and technologists

▪ Copy exact laboratories ensure identical results

▪ Non-destructive component analysis maintains parts integrity

– First commercial lab providing this service

▪ Growth Drivers– Increased equipment utilization drives continuous

cleaning/analysis opportunity

▪ New, smaller nodes more complicated to clean/analyze

– Customers require excellence/consistency

▪ Global presence creates high barriers to entry for smaller players

Semiconductor Services Business - ChemTrace

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Global Footprint – Strategically Close To Customers

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CaliforniaTexas

OregonMaine

ArizonaColorado

Manufacturing

UKCzech Republic

Israel

KoreaChina PhilippinesSingaporeTaiwan

Global presence is a strategic benefit for major customers

Cleaning & Analysis

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▪ Manufacturing facility in China

─ Deep partnership with Chinese OEM’s

─ Made in China for China and Asia

o minimal tariff issues

▪ Clearly established in Xi’an

▪ Positioned to capitalize on growing service requirements in China as domestic chip production grows

China Strategy

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FINANCIALS

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$403 $444 $514

$469

$563

$924

$1,097

3.7%

5.0%4.5%

3.4%

5.4%

10.3%

7.8%

2012 2013 2014 2015 2016 2017 2018

UCT Revenue Non-GAAP Op Margin

Proven Growth Strategy Driving Exceptional Results

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$ in Millions (FYE)

Source: Company Filings.

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$562.8

$924.4

$1,096.5

2016 2017 2018

$0.65

$2.34

$1.66

2016 2017 2018

UCT Record Revenue Growth Driving Financial Leverage

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Total Revenue$ in Millions

Non-GAAP diluted earnings per share(1)

(1) Non-GAAP results exclude intangible asset amortization and non-recurring expense items. See Appendix for reconciliation of GAAP to non-GAAP amounts.

▪ Q2’19 total revenue $265M

▪ Q2’19 Non-GAAP diluted earnings per share $0.21

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$17.6

$48.9$45.4

2016 2017 2018

5.4%

10.3%

7.8%

▪ Variable cost based operating model

▪ Targeting value-add, complex assemblies and cleaning services that support operating margin targets

▪ Focusing on capacity management– Adjusting costs with market movements

UCT Strong Cash Flow & Operating Profitability

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(1) Non-GAAP results exclude intangible asset amortization and non-recurring expense items. See Appendix for reconciliation of GAAP to non-GAAP amounts.

Non-GAAP Operating Margin(1)

GAAP Operating Cash Flow

$ in Millions

▪ Q2’19 Non-GAAP Operating Margin: 6.2%

▪ Q2’19 Operating Cash Flow $49.9M

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▪ Inventory decrease due to ongoing reduction efforts

▪ Ongoing improvements in working capital management

UCT Balance Sheet

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$ in Millions Q2’19 Q4’18

Cash & Investments $168.1 $144.1

Accounts Receivable $98.3 $107.0

Inventory $164.1 $186.1

Total Assets $1,009.0 $965.5

Liabilities $554.5 $514.5

Shareholders’ Equity $454.5 $451.0

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Capitalizing on opportunities in semi market: equipment manufacturing/parts cleaning & analysis

Vertically integrated model supports significant growth, creates high barriers to entry

Key customers (OEM & IDM) enable organic growth opportunities

Recurring revenue drives financial leverage & profitability

Accelerate share growth through acquisitions

Key Investment Messages

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APPENDIX

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$ in Thousands FY’16 FY’17 Q1’18 Q2’18 Q3’18 Q4’18 FY’18 Q1’19 Q2’19

Net income (loss) per GAAP basis $10,051 $75,085 $24,741 $18,960 $(5,997) $(1,108) $36,596 $605 $(202)

Amortization of intangible assets (1) $5,757 $5,438 $1,098 $1,098 $2,411 $4,973 $9,580 $4,854 $5,053

Executive transition costs (2) $925 - - $1,400 $246 $418 $2,064 - $382

Restructuring charges (3) $251 - $874 - - - - $947 $392

Consulting fees (4) - - $150 - - - - - -

Acquisition costs (5) - - - - $9,391 $613 $10,003 $2,339 $1,211

Impairment of “Held for Sale” Assets (6) $666 - - - - - - - -

Termination of Contractual Obligation (7) $438 - - - - $117 $117 - -

Reduction in force (8) - - - - $1,319 $297 $2,640 - -

Product transition fees (9) - - - - $657 - $657 - -

Disposal of business unit (10) - - - - $1,082 - $1,082 - -

Bank transaction costs (11) - - - - $99 - $99 - -

Fair value adjustments (12) - - - - - - - - $766

Depreciation adjustments (13) - - - - - - - - $(360)

Income tax effect of non-GAAP adjustment(14) $(1,664) $(714) $(262) $(296) $(2,220) $(1,101) $(4,501) $(1,563) $(1,407)

Income tax effect of valuation allowance (15) $4,964 $469 $(873) $303 $4,865 $4,474 $6,355 $958 $2,344

Non-GAAP net income $21,388 $80,278 $25,728 $21,465 $11,853 $8,683 $64,692 $8,140 $8,179

Reconciliation: GAAP Net Income to Non-GAAP Net Income

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1. Amortization of intangible assets related to the Company's acquisitions of AIT, Marchi and Miconex

2. Represents expense for termination benefits paid to former executives of the Company

3. Adjustment to previous restructuring reserve related to the abandonment of one of the Company's facilities

4. One-time consulting fees related to the expansion of the Company’s operations in Singapore

5. Costs incurred related to the acquisitions of Marchi and Miconex

6. Impairment of assets classified as “held for sale” related to our 3D printing business in Singapore

7. Amount paid related to the termination of a long-term contractual obligation

8. Represents severance costs related to the company’s reduction in force during the quarter

9. One-time product transition payment

10. Represents the loss on disposal of the Company’s 3D printing operations in Singapore

11. Represents the write-off of debt issuance costs, bank fees related to the pay-off of remaining debt with East West Bank.

12. Fair value adjustment related to DMS sold inventories

13. Depreciation adjustments related to QGT fixed assets

14. Tax effect on amortization of intangible assets, executive transition costs, restructuring charges, acquisition costs, impairment charges, and buy-out costs based on the non-GAAP tax rate

15. The Company's GAAP tax expense is generally higher than the Company's non-GAAP tax expense, primarily due to losses in the U.S. with full federal and state valuation allowances. The Company's non-GAAP tax rate and resulting non-GAAP tax expense considers the tax implications as if there was no federal or state valuation allowance position in effect

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Reconciliation: GAAP Income from Operations to Non-GAAP Income from Operations

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1. Amortization of intangible assets related to the Company's acquisitions of AIT, Marchi and Miconex

2. Represents expense for termination benefits paid to former executives of the Company

3. Adjustment to previous restructuring reserve related to the abandonment of one of the Company's facilities

4. One-time consulting fees related to the expansion of the Company’s operations in Singapore

5. Costs incurred related to the acquisitions of Marchi and Miconex

6. Impairment of assets classified as “held for sale” related to our 3D printing business in Singapore

7. Amount paid related to the termination of a long-term contractual obligation

8. Represents severance costs related to the company’s reduction in force during the quarter

9. One-time product transition payment

10. Fair value adjustment related to DMS sold inventory

11. Depreciation adjustments related to QGT’s fixed assets

$ in Thousands FY’16 FY’17 Q1’18 Q2’18 Q3’18 Q4’18 FY’18 Q1’19 Q2’19

Reported GAAP income from operations $22,391 $89,397 $26,908 $22,664 $922 $10,210 $60,704 $8,180 $8,971

Amortization of intangible assets (1) $5,757 $5,438 $1,098 $1,098 $2,411 $4,973 $9,580 $4,854 $5,053

Executive transition costs (2) $925 - - $1,400 $246 $418 $2,064 - $382

Restructuring charges (3) $251 - $874 - - - - $617 $367

Consulting fees (4) - - $150 - - - - - -

Acquisition costs (5) - - - - $9,391 $613 $10,003 $2,339 $1,211

Impairment of “Held for Sale” Assets (6) $666 - - - - - - - -

Termination of Contractual Obligation (7) $438 - - - - $117 $117 - -

Reduction in force (8) - - - - $1,319 $297 $2,640 - -

Product transition fees (9) - - - - $657 - $657 - -

Fair value adjustments (10) - - - - - - - - $766

Depreciation adjustments (11) - - - - - - - - $(360)

Non-GAAP income from operations $30,428 $94,835 $29,030 $25,162 $14,946 $16,628 $85,765 $15,990 $16,390

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Reconciliation: GAAP Earnings Per Diluted Share to Non-GAAP Earnings Per Diluted Share

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FY’16 FY’17 Q1’18 Q2’18 Q3’18 Q4’18 FY’18 Q1’19 Q2’19

Reported GAAP net income $0.30 $2.19 $0.66 $0.48 $(0.15) $(0.03) $0.94 $0.02 $(0.01)

Amortization of intangible assets (1) $0.18 $0.16 $0.03 $0.03 $0.06 $0.13 $0.25 $0.12 $0.13

Executive transition costs (2) $0.03 - - $0.04 $0.01 $0.01 $0.05 - $0.01

Restructuring charges (3) $0.01 - $0.02 - - - - $0.03 $0.01

Consulting fees (4) - - $0.01 - - - - - -

Acquisition costs (5) - - - - $0.24 $0.02 $0.26 $0.06 $0.03

Impairment of “Held for Sale” Assets (6) $0.02 - - - - - - - -

Termination of Contractual Obligation (7) $0.01 - - - - $0.00 $0.00 - -

Reduction in force (8) - - - - $0.03 $0.01 $0.07 - -

Product transition fees (9) - - - - $0.02 - $0.02 - -

Disposal of business unit (10) - - - - $0.03 - $0.03 - -

Bank transaction costs (11) - - - - $0.00 - $0.00 - -

Fair value adjustments (12) - - - - - - - - $0.02

Depreciation adjustments (13) - - - - - - - - $(0.01)

Income tax effect of non-GAAP adjustments (14) $(0.05) $(0.02) $(0.01) $(0.01) $(0.06) $(0.03) $(0.12) $(0.04) $(0.03)

Income tax effect of valuation allowance (15) $0.15 $0.01 $(0.02) $0.01 $0.12 $0.12 $0.16 $0.02 $0.06

Non-GAAP net income $0.65 $2.34 $0.69 $0.55 $0.30 $0.23 $1.66 $0.21 $0.21

Weighted Avg. number of diluted shares (in K) 33,150 34,303 37,491 39,297 38,930 39,009 38,919 39,448 39,734

1. Amortization of intangible assets related to the Company's acquisitions of AIT, Marchi and Miconex

2. Represents expense for termination benefits paid to former executives of the Company

3. Adjustment to previous restructuring reserve related to the abandonment of one of the Company's facilities

4. One-time consulting fees related to the expansion of the Company’s operations in Singapore

5. Costs incurred related to the acquisitions of Marchi and Miconex

6. Impairment of assets classified as “held for sale” related to our 3D printing business in Singapore

7. Amount paid related to the termination of a long-term contractual obligation

8. Represents severance costs related to the company’s reduction in force during the quarter

9. One-time product transition payment

10. Represents the loss on disposal of the Company’s 3D printing operations in Singapore

11. Represents the write-off of debt issuance costs, bank fees related to the pay-off of remaining debt with East West Bank.

12. Fair value adjustments related to DMS sold inventory

13. Depreciation adjustments related to QGT’s fixed assets

14. Tax effect of items above based on the non-GAAP tax rate each quarter

15. The Company's GAAP tax expense is generally higher than the Company's non-GAAP tax expense, primarily due to losses in the U.S. with full federal and state valuation allowances. The Company's non-GAAP tax rate and resulting non-GAAP tax expense considers the tax implications as if there was no federal or state valuation allowance position in effect