#1UCT Investor Presentation WINTER 2022#2UCT Safe Harbor 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 forms 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 gross margin, non-GAAP operating margin and non-GAAP net income 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. 2#3Enabling Technology for 30 Years Founding of UCT (intel) Core 2 Duo PAVILION Messe De 25 Mar 2-1-1--3 1991 2002 2006 2010 BlackBerry 2014 UCT Solving complex problems through generations of innovation 5G 2021 3#4(LUCT UCT Consistently Outperformed WFE UCTT Semi Revenue Growth vs. WFE 60% 50% 40% 30% 20% 10% 6.1% 0% -10% -20% 20.5% Outperformance WFE Growth UCTT Semi Rev Growth 13.3% 11.5% 5.5% 2016 2017 2018 2019 2020 * UCT estimates and UCT adaptation SEMI WWSEMS survey, Oct 2021 Billings 4#5Proven Growth Strategy $ IN MILLIONS UCT Revenue ◆ Op Margin $1,399 $2,095* CAGR* 2016-2021 UCT 30% WFE 20% $1,097 $1,066 $924 11.3% 10.3% $563 7.8% 7.8% 5.4% 2016 2017 2018 2019 2020 2021 UCT * Estimate based on Q1-Q3'21 actuals and midpoint of Q4'21 guidance 5 LO#6(UCT Successful Inorganic Growth miconex Excellence in Plastics Engineering AUGUST 2015 Purchase Price $22.8M EV/EBITDA ~6.2 QUANTUMCLEAN SEPTEMBER 2018 Purchase Price $342.0 EV/EBITDA ~6.6 MS DYNAMIC MANUFACTURING SOLUTIONS APRIL 2019 Purchase Price $30.0M EV/EBITDA ~5.4 HAM-LET Advanced Control Technology DECEMBER 2020 Purchase Price $351M EV/EBITDA ~14.5 MARCHI THERMAL SYSTEMS, INC. m FEBRUARY 2015 Purchase price $43.6M EV/EBITDA ~11.8 Increasing SAM, diversifying offerings, accelerating revenue growth, and improving margins 6#7(UCT Lifecycle of Chip Manufacturing PRODUCTION SERVICES ⚫ Part Recycling & Refurb • Part Cleanliness Analytics ⚫ Equipment Maintenance EQUIPMENT BUILDOUT . Wafer Fab Production Equipment New Part Cleaning WFE & Sub-Fab Support Equipment Pumps, Gas & Chemical Cabinets FAB CONSTRUCTION SUPPORT ChemTrace: Cleanrooms & Sub-fab Analysis • Fab Infrastructure Facilities Gas & Water, Effluent Abatement & Treatment 7#8Supplying Critical Process Capabilities PREP FRONT-END PROCESSING EPITAXY IMPLANT (UCT 1,000+ steps per device 100's of tools per fab CMP NE LITHOGRAPHY INSPECTION ETCH ANNEAL WAFER CLEAN DEPOSITION 8#9Diversified Path To Market Expansion (UCT PROCESS CHAMBER TRANSFER CHAMBER GAS PANEL FACTORY INTERFACE 6#10Industry and Customer Footprint (Q3'21) UCT REVENUE BY SEGMENT Service* 13% Non-semi 11% Foundry & Logic WFE Memory WFE 40% 36% UCT * Includes low single digit OEM service revenue UCT REVENUE BY CUSTOMER Service* 13% Non-semi 11% Other OEM 14% Applied 23% Lam 39% 10 10#11Strategic Global Footprint CALIFORNIA OREGON ARIZONA COLORADO TEXAS MAINE Global presence is a benefit for major customers (LUCT Primary operational site UK CZECH REPUBLIC PRODUCTS* -SERVICES ISRAEL KOREA CHINA PHILIPPINES TAIWAN SINGAPORE MALAYSIA 11#12Total Available Market $88B OEMS UCT PRODUCTS $30B wwwwwwood 2021 TOTAL CHIP MARKET $585B FABS (UCT * UCT estimates and UCT adaptation of Gartner's Dec'21 Semiconductor Capital Spending, Wafer Fab Equipment and Capacity, Worldwide forecast, by Bob Johnson et al UCT SERVICES $1.4B 12#13(UCT Product Division Opportunities Increase share in manufactured components Further penetration of current >10% customers Expand presence at other major OEM's Goal to add 1-2 >10% customers over the next several years Grow engagement with smaller customers - Further diversify revenue; leverage new high growth device markets (i.e. 5G, IoT, and automotive) Opportunistic consolidation within fragmented supply chain 13#14(LUCT Service Division Opportunities Reduce cost of ownership utilizing advanced technology Longer part life and improved yield through specialty coating Higher tool productivity by chemical and thermal pre-conditioning parts Create integrated solutions across UCT's core competencies Improve efficiencies by leveraging part cleaning knowledge - - Create value by efficiently managing customer spare parts Utilize part lifecycle data to develop equipment uptime improvement Introduce proven Atomically Clean Surfaces to new customers .1 LO Bo 14#15Services Division Advantaged Position Primary customers engage with global suppliers Large number of regional Cleanpart-3% players serve ~70% of market Leading position; Pentagon.5% opportunity to grow KoMiCo.6% 2020 Top 4 IDM 61% Top 4 OEM* 23% Top 2 Foundries 5% All Other 11% (LUCT * Includes OEM Sub-suppliers SERVICES MARKET* 17% UCT Others [~90 Companies] 69% 15#16Malaysia Update Initial production qualifications completed with major customers Expands global footprint; supports growth plan - - Proximity to customers and suppliers Ensures business continuity - Improves cost competitiveness State-of-the-art Facility - - Leasehold improvements underway Total capex ~$17 million ☐ ~14.5 million H1'21 - Will employ ~650 people in manufacturing, engineering, quality management and R&D UCT 1160#17(UCT End Market Update Foundry CONTINUING LEADING EDGE INVESTMENT 5G infrastructure buildout and handset demand are near and mid-term drivers Logic LOGIC RAMP CONTINUES Higher server and PC demand, supporting higher network traffic due to remote working and learning 3D NAND CONTINUING TRANSITION TO MORE LAYERS Servers and higher content 5G handset demand continues Gaming console SSD transition driving incremental demand DRAM NODE TRANSITIONS CONTINUING Servers and handsets are near- and mid-term demand drivers 17#18Margin Target Model BUSINESS UNIT TARGET MODEL Products Non-GAAP Services Gross Margin 16% - 20% 33% -38% CONSOLIDATED PERFORMANCE MODEL $1.5 $2.0B $2.0 - $3.0B $3.0 - $4.0B - Non-GAAP Gross Margin 18% -22% 19% -23% 20% -24% Non-GAAP Operating Margin Non-GAAP Operating Margin 10% -13% 12% -16% 9% -13% 10% - 14% 11% -16% (UCT *Excluding intangible amortization expense, non-recurring costs and SBC 18#19UCT Financial Update WINTER 2022#20Q3'21 Key Takeaways Record Revenue & EPS Total Revenue Gross Operating $553.7M Margin* 21.6% Margin* 12.4% Cash Generation $53.3M Cash Balance $457.0M EPS* $1.07 Products Revenue $481.9M Gross Margin* 19.3% Operating Margin* 11.9% Services Revenue ⚫ $71.7M • Gross Margin* 36.9% Operating Margin* 15.4% • (UCT *Excluding intangible amortization expense, non-recurring costs and SBC 20 20#21(LUCT Q4'21 Guidance Revenue $590M - $630M EPS $1.12 $1.29 21#22UCT Thank You#23Reconciliation: GAAP Net Income (loss) to Non-GAAP Net Income $ in Thousands FY'17 FY'18 FY'19 FY'20 Q1'21 Q2'21 Q3'21 1. Amortization of intangible assets related to the Company's acquisitions of AIT, Thermal, FDS, QGT and DMS Net income (loss) per GAAP basis 75,085 36,596 Amortization of intangible assets (1) 5,438 9,580 Restructuring charges (2) 4,821 16,667 20,090 19,799 4,573 (9,351) 77,605 24,997 4,889 17,098 9,511 31,880 9,512 2. Represents severance, retention and costs related to facility closures 3. Represents compensation expense for stock granted to employees and directors 140 (28) 896 4. Represents costs related to acquisitions Stock based compensation expense (3) 13,062 12,899 4,043 3,724 4,324 5. Represents inventory adjustments related to end-of-life products Acquisition related costs* (4) 6. One-time product transition payment 10,102 3,861 1,024 1,337 8,093 105 Inventory adjustments (5) 684 7. Represents the loss on disposal of the Company's 3D printing operations in Singapore 8. Fair value adjustments related to contingent consideration, purchase obligation, DMS' sold inventories, forward hedge contracts 9. Depreciation adjustments related to QGT's fixed assets 10. Represents gain realized on the sale of land in South Korea 11. Insurance proceeds pertaining to the Cinos fire in 2018 12. Tax effect of items (1) through (11) above based on the non-GAAP tax rate 13. 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 Product transition fees (6) Disposal of business unit (7) Fair value adjustments (8) Depreciation adjustments (9) 657 1,082 7,457 (360) 7,624 11,582 8,583 2,288 Gain on the sale of property (10) (1,352) Insurance proceeds (11) (7,332) Income tax effect of non-GAAP adjustments (12) Income tax effect of valuation allowance (13) Non-GAAP net income (714) (4,501) (14,343) 469 6,355 9,461 80,278 64,692 46,544 (8,200) 994 (2,639) 1,140 114,966 38,157 (5,259) (2,760) 1,956 1,828 43,678 48,757 UCT * Refer to 10k 223#24Reconciliation: GAAP to Non-GAAP Earnings Per Diluted Share FY'17 FY'18 FY'19 FY'20 Q1'21 Q2'21 Q3'21 Reported GAAP net income (loss) $2.19 $0.94 $(0.24) $1.89 1. Amortization of intangible assets related to the Company's acquisitions of AIT, Thermal, FDS, QGT and DMS $0.60 $0.39 $0.70 2. Represents severance, retention and costs related to facility closures Amortization of intangible assets (1) $0.16 $0.25 $0.50 $0.48 $0.12 $0.22 $0.21 3. Represents compensation expense for stock granted to employees and directors Restructuring charges (2) $0.12 $0.42 $0.11 $0.00 $(0.00) $0.02 4. Represents costs related to acquisitions Stock based compensation expense (3) $0.33 $0.32 $0.10 $0.09 $0.10 5. Represents inventory adjustments related to end-of-life products Acquisition related costs*(4) $0.26 $0.10 $0.02 $0.03 $0.18 $0.00 6. One-time product transition payment $0.01 7. Represents the loss on disposal of the Company's 3D printing operations in Singapore Inventory adjustments (5) Product transition fees (6) Disposal of business unit (7) Fair value adjustments (8) $0.02 $0.03 $0.19 $0.19 $0.28 $0.19 $0.05 Depreciation adjustments (9) $(0.01) Gain on the sale of property (10) $(0.03) Insurance proceeds (11) $(0.18) Income tax effect of non-GAAP adjustments (12) $(0.02) $(0.12) $(0.36) $(0.20) $(0.06) $(0.12) $(0.06) Income tax effect of valuation allowance (13) $0.01 $0.16 $0.23 $0.02 $0.03 $0.04 $0.04 Non-GAAP net income $2.34 $1.66 $1.16 $2.80 $0.92 $0.99 $1.07 Weighted Avg. number of diluted shares (in K) 34,303 38,919 40,027 41,074 41,639 44,253 45,404 UCT * Refer to 10k 8. Fair value adjustments related to contingent consideration, purchase obligation, DMS' sold inventories, forward hedge contracts 9. Depreciation adjustments related to QGT's fixed assets 10. Represents gain realized on the sale of land in South Korea 11. Insurance proceeds pertaining to the Cinos fire in 2018 12. Tax effect of items (1) through (11) above based on the non-GAAP tax rate 13. 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 24