Exhibit 99.1

Photronics, Inc.Global Leader in the Merchant Photomask Industry 22nd Annual Needham Growth ConferenceJanuary 15, 2020

Safe Harbor Statement 2 This presentation and some of our comments may contain projections or other forward-looking statements regarding future events, our future financial performance, and/or the future performance of the industry. These statements are predictions, and contain risks and uncertainties. Actual events or results may differ materially from those presented. These statements include words like “anticipate”, “believe”, “estimate”, “expect”, “forecast”, “may”, “plan”, “project”, “in our view” or the negative thereto. We cannot guarantee the accuracy of any forecasts or estimates, and we are not obligated to update any forward-looking statements if our expectations change. If you would like more information on the risks involved in forward-looking statements, please see the documents we file from time to time with the Securities and Exchange Commission.

Global leader in merchant photomask industryDelivering growth by leveraging core competencies: Operational Excellence, Low Cost Producer, Technology Leadership, Customer IntimacyGrowing more quickly than the marketTechnology aligned with secular growth trendsChina industry expansion (IC & FPD) – Made in China 2025Technology inflection from LCD to AMOLEDRapid expansion of G10.5+ panel capacityInvestment strategy drives earnings growthStrategic investments bring top-line growthOperating leverage creates margin expansionIncreasing free cash flow to fund growth investments and share repurchase A Compelling Investment Thesis 3

Photronics at a Glance 4 Unmatched Global Footprint11 Strategically Located Manufacturing Facilities

Photomasks: Essential for Electronics Manufacturing 5 Component Design End User Manufacturing Process Photomask BRINGS DESIGN TOMANUFACTURING FLOOR

Cost controlSupply chain optimization Low Cost Producer Flexible deliveryHigh yields Operational Excellence Trusted partnerWafer yield enhancement Customer Intimacy Process know-howAdvanced PoR Technology Leader Core Competencies Underpin Sustainable Growth 6

ChinaTotal TAM ~$700M by 2022Region with strongest growth potentialSupported by new manufacturing facilities since 2019IC CaptiveApproximately $2.6B TAMWe are seen as trusted partnerCommitments improve sustainabilityHigh-end revenue growthHigh value and high growthSupports China & captive initiatives Repositioned for Growth 7 +245% +44% +53% Note: classifications in graph above are not distinct; revenue related to certain products may appear in more than one category

Repositioned the companyGrew high-end revenue Investing in ChinaPhase I – 2019-2020Phase II – 2020-2021 Leveraging FPD technology inflections Entering strategic photomask partnershipsExploring adjacent market M&A Driving Sustainable, Profitable Growth 8 Past (2017 – 2018) Recent and Present (2019 – 2021) Future (2022 and beyond)

We already have growing business in China27% of total revenue in 201918% of IC revenue52% of FPD revenueGrowing strong since 2016IC +83% CAGRFPD +59% CAGRManufacturing presence in China aims to accelerate growthCustomer contracts help ramp facilities more quicklyInvestment incentives reduce risk and improve returnsIC JV enables us to compete more effectively Developing and Growing China Business 9 +69% CAGR

Mobile devices moving from LCD to AMOLEDSuperior visual characteristicsLower power consumptionEnables flexible formatPreferred for VR/AR devicesIncreasing mask complexityMore mask layers per setTighter specs on each layerEstablished technology leadership1st firm with P-800 mask writerProduces highest resolution AMOLED masksCompetitive advantage vs. all merchants and captives Leveraging Technology Leadership for Mobile Display AMOLED Adoption 10 Source: Internal Estimates AMOLED remains preferred technology for mobile applications

65” 65” 65” 65” 65” 65” 65” 65” 95% G10.5+  Improved Glass Efficiency for Ultra-Large Screen TV 11 2940 mm x 3370 mm 2200 mm x 2500 mm 1950 mm x 2250 mm 1500 mm x 1850 mm 75” 75” 75” 75” 75” 75” 94% 65” 65” 65” 64% 75” 75” 73% 65” 65” 88%

China represents fastest growing display region51 fabs in production or under constructionLargest LCD display producer (Korea 2nd)Photomask opportunities in China are attractiveWide range of display technologiesNo merchant photomask producer with high-end experienceWe are aligned with fastest growing sectors: AMOLED & G10.5+ “Made in China 2025” Driving Growth in FPD Market 12 Source: Internal Estimates +12% CAGR

51 China Display Fabs in Production by 2022 13 Image from https://commons.wikimedia.org/wiki/File:China-equirect.png G10.5+ (5)AMOLED (16)LCD (30) Photronics LocationsFPD KoreaFPD HefeiFPD Taiwan

China represents fastest growing semiconductor regionGrowing domestic producersInvestments by multi-nationalsMore investment needed to meet national targets2023 forecast is 21%China government target is 40% by 2020, 70% by 2025Photomask opportunities in China are attractiveWide range of nodes in logic and memoryNo strong domestic merchant mask producer “Made in China 2025” Driving Growth in IC Market 14

22 New China 12” IC Fabs 2018-2022 15 Image from https://commons.wikimedia.org/wiki/File:China-equirect.png Photronics LocationsIC KoreaIC XiamenIC TaiwanIC Boise (not shown) Logic (16)Memory (6)

Top line growth with continued focus on driving costs outDisciplined focus on investments to improve ROICMaintain strong balance sheet while returning cash to shareholdersShare repurchasesFlexibility to invest in other growth opportunities (organic or M&A) Strategic Priorities to Improve Shareholder Value 16

Powerful operating leverage: target 50%Strong operating cash flow generatorDisciplined investment approachSolid balance sheet Solid Financial Fundamentals 17

Key Success Factors“Made in China 2025” – new facilitiesFPD technology inflectionsRepositioned the companyNode migration (logic & memory)Growing business with captive producersIC JV’s in China and TaiwanStable mainstream businessCross-site collaboration to serve global customers On Our Way to 2020 Target 18 Q4 2019 Run-rate $625M

Fund organic growthGeographic expansion into ChinaInvestments to maintain technical leadershipCapacity expansion when reciprocated by customer commitmentExplore strategic M&APhotomask industry – IC & FPDAdjacencies to increase revenue diversificationShare repurchaseRepurchased 4.7M shares ($44.8M) since 2018$89M remaining in current $100M authorizationRedeemed $115M in convertible debt since 2016, eliminating 10.3M potentially dilutive shares Clear Capital Deployment Priorities 19 -15%

Clear path to accelerate profitable growthPrudent stewardship of balance sheetFinancial model to grow income faster than revenueOn track to achieve financial targetsRevenue $630M & EPS $0.80 by 2020Operating margin > 15%Minimum $100M net cashImprove ROIC – no projects accepted below hurdle rate Financial Summary 20

Thank you for your interest! For Additional Information:R. Troy Dewar, CFAVice President, Investor Relations203.740.5610tdewar@photronics.com

Appendix

Record revenue, up 13% Q/Q and 8% Y/YRecord FPD revenue driven by mobile displays and Hefei production rampRecord IC revenue as China design activity acceleratesRecord revenue of products shipped to China, representing 33% of total revenueOperating margin expanded to 13.7% on operating leverage and cost controlNet income attributable to Photronics, Inc. shareholders of $9.7M ($0.15/share)Cash balance grew to $207M on strong operating cash flowRepurchased 1.0M shares for $11MChina production contributed $11M to revenue Q4 2019 Summary 24 Successfully repositioned the business; China investments driving long-term, profitable growth

$M (except EPS) Q419 Q319 Q/Q Q418 Y/Y Revenue $ 156.3 $ 138.1 13% $ 144.7 8% Gross Profit $ 38.2 $ 30.6 25% $ 35.4 8% Gross Margin 24.4% 22.1% 230 bps 24.5% (10 bps) Operating Income $ 21.5 $ 13.4 60% $ 18.0 19% Operating Margin 13.7% 9.7% 400 bps 12.5% 120 bps Other income (expense) ($ 6.1) ($ 0.3) ($ 5.8) $ 2.3 ($ 8.4) Income tax provision $ 2.3 $ 3.2 ($ 0.9) $ 3.6 ($ 1.2) Minority interest $ 3.3 $ 3.5 ($ 0.1) $ 4.3 ($ 0.9) Net Income* $ 9.7 $ 6.3 53% $ 12.5 (22%) Diluted EPS* $ 0.15 $ 0.10 $ 0.05 $ 0.18 ($ 0.03) Days in quarter 95 91 4 94 1 Gross and operating margin improved Q/Q on revenue growth, operating leverage and cost controlsChina operations were $4.1M negative impact to operating incomeOther income/expense primarily attributable to FX gain/lossMinority interest reflects Taiwan JV gain partially offset by China JV loss Income Statement Summary 25 *Net income attributable to Photronics, Inc. shareholders

Revenue grew with increase in broad-based design activityChina revenue rebounded as firms accelerate product development+72% Q/Q; +32% Y/YRepresents 22% of Q419 IC revenueOutlookExpect stable to improving high-end demandAnticipate production ramping in XiamenPotential impact from US-China trade discussionsSeasonal headwinds $M Q419 Q319 Q/Q Q418 Y/Y High-End* $ 45.0 $ 38.5 17% $ 39.4 14% Mainstream $ 67.6 $ 61.7 9% $ 71.4 (5%) Total $ 112.5 $ 100.2 12% $ 110.9 1% IC Photomask Revenue 26 *28nm and smaller Total may differ due to rounding

IC Photomask Revenue 27 Mainstream High-End High-End: 28nm and smaller; total may differ due to rounding

Record FPD revenue driven by mobile displays and China production ramp, including G10.5+China revenue +32% Q/Q; +118% Y/YRepresents 61% of Q419 FPD revenueOutlookMobile display demand expected to remain highLCD industry downturn continuesHefei shipments should continue to ramp $M Q419 Q319 Q/Q Q418 Y/Y High-End* $ 28.5 $ 25.9 10% $ 22.0 29% Mainstream $ 15.2 $ 12.0 27% $ 11.8 30% Total $ 43.7 $ 37.9 15% $ 33.8 29% FPD Photomask Revenue 28 *≥G8 and AMOLED Total may differ due to rounding

FPD Photomask Revenue 29 Mainstream High-End High-End: ≥G8 and AMOLED; total may differ due to rounding

$M Q419 Q319 Q418 Cash $ 207 $ 197 $ 329 Debt $ 53 $ 49 $ 57 Net Cash* $ 154 $ 148 $ 272 Operating Cash Flow $ 48 $ 26 $ 44 Capital Expenditures $ 17 $ 20 $ 28 Share repurchase $ 11 - $ 16 Deploying cash balance to fund China investmentsDebt is local China borrowing to finance fixed assetsFY 2019 capex $177M; anticipate FY 2020 capex ~ $100M (includes 2019 carryover)Repurchased 1.0M shares for $11M (YTD 2.1M shares for $22M)Balance sheet able to fund planned investments, share repurchases, and strategic M&A opportunities Select Financial Data 30 *Net cash defined as cash and cash equivalents less long-term borrowings (including current portion), as reported in accordance with GAAP

Total Revenue 31 IC FPD