AIXTRON : Q3 2025 RESULTS PRESENTATION

About this update from Aixtron Se

Q3/2025 Investor Presentation Dr. Felix Grawert, CEO Dr. Christian Danninger, CFO October 30 th , 2025 This document may contain forward-looking statements regarding the business, results of operations, financial condition and earnings outlook of AIXTRON. These statements may be identified by words such as "may", "will", "expect", "anticipate", "contemplate", "intend", "plan", "believe", "continue" and "estimate" and variations of such words or similar expressions. These forward-looking statements are based on the current assessments, expectations and assumptions of the executive board of AIXTRON, of which many are beyond control of AIXTRON, based on information available at the date hereof and subject to risks and uncertainties. You should not place undue reliance on these forward-looking statements. Should these risks or uncertainties materialize or should underlying expectations not occur or assumptions prove incorrect, actual results, performance or achievements of AIXTRON may materially vary from those described explicitly or implicitly in the relevant forward-looking statement. This could result from a variety of factors, such as those discussed by AIXTRON in public reports and statements, including but not limited those reported in the chapter "Risk Report". AIXTRON undertakes no obligation to revise or update any forward-looking statements as a result of new information, future events or otherwise, unless expressly required to do so by law. Due to rounding, numbers presented throughout this report may not add up precisely to the totals indicated and percentages may not precisely reflect the absolute figures for the same reason. Our registered trademarks: AIXACT®, AIX-Multi-Ject® , AIXTRON®, Close Coupled Showerhead®, EXP®, EPISON®, Gas Foil Rotation®, Multi-Ject® , OVPD®, Planetary Reactor®, PVPD®, STExS®, TriJet® Financials Q3/2025: Q3 delivered within revenue guidance Order Intake of EUR 124m Revenues of EUR 120m - within guided range Gross Profit at EUR 46m ; Gross Margin at 39% EBIT at EUR 15m ; EBIT Margin at 13% - lower than expected due to quarter-on-quarter shifts and FX effects Free Cash Flow at EUR 39m; strong increase driven by net result, continued working capital reduction and low capex AI data center build out driving demand in Optoelectronics Laser business pick up in Q2 continues in Q3 Data center demand drives capacity utilization in GaN Automotive SiC demand remains soft Structural growth drivers fully intact - but short term visibility remains low Demand in western power electronics markets currently still weak; partially compensated by Asian/Chinese markets GaN/SiC-power expected roughly flat yoy; LED/Micro LED revenues much weaker yoy; Optoelectronics up yoy FY/2025 Guidance 1 adjusted Revenues 1 FY/25E: EUR 530m - EUR 565m Gross Margin 1,2 FY/25E: 40% - 41% EBIT Margin 1,2 FY/25E: 17% - 19% Geopolitical dynamics monitored closely US-tariffs: Semiconductor Equipment currently exempt; Management is monitoring developments closely 1 Q4/2025 based on $1.15/€ rate (previously $1.10/€); 2 incl. a mid-single-digit EURm expense for headcount reduction in operations area; will result in similar amount of permanent savings corresponding to ~1pp higher Margins EUR million 630 633 530-565e 429 463 Q4/25e 9M/2025 269 2020 2021 2022 2023 2024 2025 Optoelectronics and Communication¹ LED incl. Micro LED GaN-Power SiC-Power Other incl. R&D After Sales FY25 Guidance low end FY25 Guidance high end 1 Includes applications in Consumer Optoelectronics, Solar and Telecom/Datacom Revenues Gross Profit Margin EBIT Margin Q3/25 € 119.6 m -23% YoY € 46.4 m 39% -31% YoY € 15.4 m 13% -59% YoY 9M/25 € 369.5 m -9% YoY € 136.2 m 37% -15% YoY € 42.3 m 11% -30% YoY FY/24 € 633.2 m € 262.5 m 41% € 131.2 m 21% 1% YoY -6% YoY -16% YoY 9M Gross Profit & EBIT impacted by mid-single-digit EURm expense for personnel reduction in operations area in H1/25 9M Adjusted Gross Margin at 38% slightly lower yoy due to product mix with lower margins (9M/24: 39%) 9M Opex down yoy mainly due to ~13% lower R&D cost driven by reduced external contract work and consumables 9M Adjusted EBIT Margin at 12% lower yoy due to negative operating leverage resulting from lower volumes and negative FX effects (9M/24: 15%) Working Capital 1 Operating Cash Flow Free Cash Flow Cash Balance 2 Q3/25 € 348.2 m € -34.5 m vs. Q2/25 € 43.4 m € +28.0 m YoY € 39.2 m € +40.7 m YoY € 153.4 m € +38.6 m vs. Q2/25 9M/25 € 348.2 m € -99.5 m vs. Q4/24 € 128.5 m € +100.3 m YoY € 110.3 m € +168.3 m YoY € 153.4 m € +88.8 m vs. Q4/24 FY/24 € 446.9 m € 26.2 m € -72.4 m € 64.6 m € +93.9 vs. Q4/23 € +73.5 m YoY € +37.2 m YoY € -117.1 m vs. Q4/23 9M Operating Cash Flow strong driven by Net Result of the Period and continued Working Capital reduction 9M FCF with strong improvement due to Net Result and continued reduction of Working Capital & Capex 9M Cash Balance with €153m up by €89m vs. Q4/24 Working Capital = Inventories + Trade Receivables - Trade Payables - Contract Liabilities for Advance Payments; FX-effects excluded in illustrated Change in Working Capital Including other current financial assets 1 Power Electronics SiC Power EV main inverters and EV OBCs EV charging infrastructure Data centers: AC/DC Wind & PV Traction & large drives SiC GaN 2 GaN Power & RF Fast charging / mobile devices Data centers: AC/DC & DC/DC Motor drives, e.g. white goods AI power delivery EV OBCs Base stations Optoelectronics / LEDs 4 Lasers Optical data communication 3D sensing LiDAR Industrial power lasers AsP AsP GaN 3 Micro LEDs / Specialty LEDs Industrial displays (in/outdoor) TVs Smart watches / AR glasses Automotive Horticulture 1 Update AIXTRON maintains a strong (leading) position in SiC power segments 2025 : Market slowdown in the West , but strong G10 traction driven by 6-to-8 inch transition and competitive cost-per-wafer Mid-term (2026-2029) : OEM's switching from 400V to 800V battery systems using SiC will increase demand Qualification efforts at further customers are ongoing, expect to benefit over-proportionally when the market is taking up again. ~doubling of annual tool demand by 2029 due to Continued EV ramps Market share gains of SiC vs. silicon due to rapidly declining prices of SiC wafers SiC power - faster growth than market due to market share gains G10-SiC tool Update AIXTRON maintains a leading (dominant) position in GaN power segments 2025 : Continued slowdown in Western markets ; overcapacity delays chip-level qualifications Preparation for launch of 300mm technology Co-existence of 200mm and 300mm wafer sizes expected Mid-term (2026-2029) : accelerated (~3x) growth of annual tool demand due to GaN penetrating more and more applications GaN replacing silicon (energy efficiency) AI power delivery G10-GaN tool GaN power - acceleration of growth due to additional demand from AI GaN power - growth is fueled by adding more and more applications ≥ 1200 V Voltage 1200V GaN Smartphone fast chargers AC/DC for datacenters Class-D audio Industrial Battery tools, PSU DC/DC for datacenters Wireless charging LV motor drives battery consumer devices (e-bikes, …) Low speed electric vehicles AI power delivery Micro-Inverters Solar Time of Flight / Lidar 2020 - 2023 2024 - 2026 2027 - 2028 EV On-Board Charger (OBC) HV motor drives, home appliances < 200 V 500-700 V Time of market adoption

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