© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 2 S A F E H A R B O R S TAT E M E N T B&W Enterprises cautions that this presentation contains forward-looking statements within the meaning of federal securities laws. All statements other than statements of historical or current fact included in this presentation are forward-looking statements, including, without limitation, statements relating to the company's business outlook and expected financial performance, including adjusted EBITDA and sales targets, expectations regarding future growth, expansion and profitability, as well as statements about B&W’s future pipeline of new p rojects and business within its Renewable, Environmental and Thermal operating segments and their impact on future shareholder value. These forward-looking statements are based on management’s current expectations and involve a number of risks and uncertainties, including, among other things, the impact of global macroeconomic conditions, including inflation and volatility in the capital markets; the impact of the ongoing conflict in Ukraine; our ability to integrate acquired businesses and the impact of those acquired businesses on our cash flows, results of operations and financial condition, including our recent acquisitions of Babcock & Wilcox Solar Energy, Inc. ("Babcock & Wilcox Solar"), formerly known as Fosler Construction Company Inc. and/or Fosler, Babcock & Wilcox Renewable Service A/S, formerly known as VODA A/S ("VODA"), Fossil Power Systems, Inc. ("FPS"), Optimus Industries, LLC ("Optimus") and certain assets of Hamon Holdings Corporation ("Hamon"); our recognition of any asset impairments as a result of any decline in the value of our assets or our efforts to dispose of any assets in the future; our ability to obtain and maintain sufficient financing to provide liquidity to meet our business objectives, surety bonds, letters of credit and similar financing; our ability to comply with the requirements of, and to service the indebtedness under, our debt facility agreements; our ability to pay dividends on our 7.75% Series A Cumulative Perpetual Preferred Stock; our ability to make interest payments on our 8.125% senior notes due 2026 and our 6.50% notes due 2026; the highly competitive nature of our businesses and our ability to win work, including identified project opportunities in our pipeline; general economic and business conditions, including changes in interest rates and currency exchange rates; cancellations of and adjustments to backlog and the resulting impact from using backlog as an indicator of future earnings; o ur ability to perform contracts on time and on budget, in accordance with the schedules and terms established by the applicable contracts with customers; failure by third-party subcontractors, partners or suppliers to perform their obligations on time and as specified; delays initiated by our customers; our ability to successfully resolve claims by vendors for goods and services provided and claims by customers for items under warranty; our ability to realize anticipated savings and operational benefits from our restructuring plans, and other cost-savings initiatives; our ability to successfully address productivity and schedule issues in our B&W Renewable, B&W Environmental and B&W Thermal segments; our ability to successfully partner with third parties to win and execute contracts within our B&W Environmental, B&W Renewable and B&W Thermal segments; changes in our effective tax rate and tax positions, including any limitation on our ability to use our net operating loss carryforwards and other tax assets; our ability to successfully manage research and development projects and costs, including our efforts to successfully develop and commercialize new technologies and products; the operating risks normally incident to our lines of business, including professional liability, product liability, warranty and other claims against us; difficulties we may encounter in obtaining regulatory or other necessary permits or approvals; changes in actuarial assumptions and market fluctuations that affect our net pension liabilities and income; our ability to successfully compete with current and future competitors; our ability to negotiate and maintain good relationships with labor unions; changes in pension and medical expenses associated with our retirement benefit programs; social, political, competitive and economic situations in foreign countries where we do business or seek new business; the impact of COVID-19 or other similar global health crises, and the other factors specified and set forth under "Risk Factors" in our periodic reports filed with the Securities and Exchange Commission, including, without limitation, the risks described in the Company's Annual Report on Form 10-K for the year ended December 31, 2022 under the caption "Risk Factors" and "Management's Discussion and Analysis of Financial Condition and Results of Operations" (as applicable). These factors should be considered carefully, and B&W Enterprises cautions you not to place undue reliance on these forward-looking statements, which speak only as of the date of this presentation, and undertakes no obligation to update or revise any forward-looking statement, except to the extent required by applicable law. Non-GAAP Financial Measures This presentation contains information regarding our adjusted EBITDA, which is a non-GAAP financial measure. Adjusted EBITDA on a consolidated basis is defined as the sum of the adjusted EBITDA for each of the segments, further adjusted for corporate allocations and research and development costs. At a segment level, adjusted EBITDA presented is consistent with the way our chief operating decision maker reviews the results of operations and makes strategic decisions about the business and is calculated as earnings before interest expense, tax, depreciation and amortization adjusted for items such as gains or losses arising from the sale of non-income producing assets, net pension benefits, restructuring costs, impairments, gains and losses on debt extinguishment, costs related to financial consulting, research and development costs and other costs that may not be directly controllable by segment management and are not allocated to the segment. We present consolidated Adjusted EBITDA because we believe it is useful to investors to help facilitate comparisons of our ongoing, operating performance before corporate overhead and other expenses not attributable to the operating performance of our revenue generating segments. In this presentation, we also present certain targets for our adjusted EBITDA in the future; these targets are not intended as guidance regarding how we believe the business will perform. We are unable to reconcile these targets to their GAAP counterparts without unreasonable effort and expense due to the aspirational nature of these targets.

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 3 W E ’ R E A G L O B A L E N E R GY L E A D E R C R E AT I N G A B R I G H T E R F U T U R E OUR PROVEN, BEST-IN-CLASS POWER PRODUCTION TECHNOLOGIES SUPPORT THE CREATION OF A NET-ZERO FUTURE. • From our first patent for a more efficient boiler to more than 17,000 patents since, we continue to drive innovation and change • Today, we are a globally recognized technology leader and innovator at the forefront of the energy transition • Helping utility and industrial customers with the technical challenges of moving from current to future energy sources • Delivering systems, parts and field services to help utility and industrial plants operate more effectively and efficiently • Our waste- and biomass-to-energy, carbon capture, hydrogen production and environmental technologies support the reduction of greenhouse gases, including CO2 and methane, in an environmentally friendly way Ensuring energy security for customers and the world Making net-zero ambitions a reality today Providing high quality and innovative technologies since 1867

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 4 W E ’ R E H E L P I N G C U S T O M E RS C R E AT E C L E A N A N D R E L I A B L E E N E R GY SUPPORTING A CIRCULAR ECONOMY Ecologically sound ways of using and recycling resources like biomass, municipal waste, and solar energy to create clean, renewable baseload power while reducing greenhouse gas emissions. REDUCING THE IMPACT OF GREENHOUSE GAS EMISSIONS Hydrogen production, carbon capture, ash handling, cooling systems, energy recovery and storage, and advanced emissions control solutions to help preserve the world’s natural resources. CREATING RELIABLE AND EFFICIENT STEAM GENERATION Providing boilers and related equipment, aftermarket parts, service and upgrades to help utilities and industries generate reliable thermal energy from a wide range of fuels and bridge the gap during the global transition to new energy sources. CLEAN ENERGY SOLUTIONS TRADITIONAL DELIVERING VALUE THROUGH TECHNOLOGY-DRIVEN PRODUCTS AND SERVICES, WITH CONTINUAL PRODUCT IMPROVEMENT AND ROBUST R&D EFFORTS TO SUPPORT FUTURE ENERGY NEEDS

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 5 T H E F O U N DAT I O N O F O U R C O M PA N Y Our Vision: Advancing energy and environmental solutions that bring power and progress to our world. Our Mission: B&W delivers environmentally conscious, technology-driven solutions and services to energy and industrial customers worldwide – safely, ethically and as promised. Our Core Values: Safety • Integrity • Quality • Respect • Agility

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 6 WE ’ RE L E A DI N G A N D DRI VI N G C L E A N POWE R S OLU T I ON S B&W SUPPORTS GLOBAL TRENDS DRIVING THE NEED FOR SUSTAINABLE ENERGY CONVERSION SOLUTIONS U.S. Inflation Reduction Act increases the investment into low carbon intensity solutions and hydrogen production Energy trade disruptions around the world require increased use of available natural resources and reliable energy Global drive toward renewable and reusable energy sources to limit carbon and methane emissions E.U. Net-Zero Industry Act accelerating investment in solar, energy storage and carbon capture A strong utility and industrial boiler installed base creates stable aftermarket in the U.S. and continued growth in international power generation Water scarcity and environmental regulationsdrive need for custom cooling solutions

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 7 W E ’ R E D R I V I N G G R O W T H , I N N OVAT I O N A N D E X PA N S I O N CORE GROWTH STRATEGIES FOCUSED ON DRIVING INNOVATIVE ENVIRONMENTAL, RENEWABLE AND ENERGY TRANSITION TECHNOLOGIES, GROWING AFTERMARKET SALES BY LEVERAGING THE INSTALLED BASE, AND EXPANDING INTERNATIONALLY IN KEY REGIONS OPPORTUNITY Meet the global need for carbon reduction and greenhouse gas reduction with patented renewable waste-to-energy, biomass, hydrogen production, solar and carbon-capture solutions INNOVATION Provide best-in-class environmental technologies across a broad array of markets to meet growing environmental regulations and climate goals GROWTH Leverage tailwinds created by government tax incentives and global climate investment strategies to drive sales of innovative energy transition technologies and services EXPANSION Utilize experienced sales, service and business development teams in key international regions to serve the growing renewable, environmental and thermal markets

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 8 W E ' R E L E V E R A G I N G A VA S T I N S TA L L E D B A S E A N D P R OV E N T E C H N O L O G I E S More than 500 waste-to-energy and biomass-to-energy units at 300+ facilities globally Serving utility, waste management, municipality and investment firm customers Extensive expertise in managing and executing both utility-scale and community solar projects Large worldwide installed base of wet and dry scrubbers for SOx reduction, particulate control equipment, NOx reduction technologies, and mercury control systems to meet environmental regulations Flue gas pre-treatment technologies for use with CO2 capture Nearly 2,000 wet, dry and hybrid cooling system units (10,000+ cells) installed globally More than 300 operating utility and industrial boiler units in the U.S. and nearly 200 operating utility and industrial boiler units across 38 countries outside of North America (excluding waste-to-energy and biomass) More than 5,000 industrial water-tube package boilers and other waste heat recovery products installed in a variety of facilities, including refining, petrochemical, food processing, metals and mining, carbon black and wood products A VAST GLOBAL INSTALLATION OF B&W’S CORE TECHNOLOGIES AT UTILITY AND INDUSTRIAL PLANTS, RENEWABLE PLANTS AND PULP & PAPER FACILITIES CREATE A LARGE GROWTH OPPORTUNITY FOR PARTS, SERVICES AND RETROFITS

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 9 CORPORATE SNAPSHOT B A B C O C K & W I L C OX P R O F I L E Notes: All charts based on LTM December 31, 2022 revenues, unless otherwise noted. 1. Backlog does not include shorter lead-time parts and services. 2. The most comparable GAAP target is not available without unreasonable effort. Disclaimer: B&W Enterprises cautions not to place undue reliance on any forward-looking statements, which speak only as of the date of this presentation and may be impacted by the risks described in our SEC reports including, without limitation, the impact of COVID-19 on us and the capital markets and global economic climate generally. We undertake no obligation to update or revise any forward-looking statement, except to the extent required by applicable law. Headquarters: Akron OH, USA Founded: 1867 Ownership: Public (NYSE:BW) Employees: ~2150 LTM Revenue December 2022: LTM Adjusted EBITDA: ~$890M $72.4M 2023 EBITDA Target: $100M to $120M2 B&W RENEWABLE Power Generation 72% Industrial 28% Aftermarket & Upgrades 12% Parts & Services 47% North America 36% Europe 53% Asia & Other 11% New Build 41% B&W THERMAL Industrial 35% Power Generation 65% Aftermarket & Upgrades 45% Parts & Services 45% North America 83% Europe 2% Asia & Other 15% New Build 10% B&W ENVIRONMENTAL Industrial 37% Power Generation 63% Aftermarket & Upgrades 33% Parts & Services 33% North America 46% Europe 18% New Build 34% Asia & Other 37% CONSOLIDATED 36% 17% 47% 41% 21% 38% Industrial 32% Power Generation 68% Aftermarket & Upgrades 31% Parts & Services 44% New Build 25% North America 60% Europe 23% Asia & Other 17% Backlog1 as of December 31, 2022 B&W Renewable LTM Revenue B&W Environmental B&W Thermal

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 1 0 60-70% 10-15% 15-25% PIPELINE REVENUE SPLIT 2023-2025 A S O L I D P I P E L I N E O F G L O B A L O P P O R T U N I T I E S Manufacturing Service Facilities Construction Sales/Support Future Sales/Support Sales Reps Future Sales Reps Future Service Facilities Americas APAC Europe ME/A $2,085 $1,088 $1,288 $892 $ M ILLIONS B&W RENEWABLE Americas APAC Europe ME/A $757 $189 $655 $ M ILLIONS $67 B&W ENVIRONMENTAL Americas APAC Europe ME/A $692 $148 $16 $295 $ M ILLIONS B&W THERMAL 3-YEAR PIPELINE Total pipeline more than $8 billion over the next 3 years excluding parts and services Disclaimer: B&W Enterprises cautions not to place undue reliance on any forward-looking statements, which speak only as of the date of this presentation and may be impacted by the risks described in our SEC reports including, without limitation, the impact of COVID-19 on us and the capital markets and global economic climate generally. We undertake no obligation to update or revise any forward-looking statement, except to the extent required by applicable law. 2023-2025 Addressable Market Europe More than $8B 2023-2025 Addressable Market Americas Solar: More than $27B Other: More than $8B 2023-2025 Addressable Market Asia-Pacific More than $8B A WIDE FOOTPRINT AND ONGOING EXPANSION POSITIONS B&W TO LEVERAGE MARKET TRENDS AROUND THE WORLD 2023-2025 Addressable Market Middle East & Africa More than $4B

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 1 1 B R I G H T L O O P H Y D R O G E N P R O D U C T I O N SOLID ADVANTAGES: • Hydrogen from solid fuels – can utilize a variety of solid or gaseous fuels as feedstock • High rate of carbon captured – inherent CO2 isolation without the need for expensive carbon capture equipment • Competitive hydrogen cost – lower levelized cost of hydrogen when compared to other hydrogen production methods • Scalable for a range of applications– accommodates both large and small applications TM FEEDSTOCK OUTPUT BrightLoopTM Technology BIOMASS BIOGAS NATURAL GAS COAL PETROLEUM COKE CO2 for Storage/Beneficial Use STEAM HYDROGEN POWER SYNGAS Nitrogen for Beneficial Use

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 1 2 B R I G H T L O O P H Y D R O G E N P R O D U C T I O N P R O G R E S S BRIGHTLOOP EVOLUTION 1994 - 2004 2008 2014 2024 2026 TM Sub-Pilot with The Ohio State University and B&W 25 Kilowatts Thermal INDUSTRIAL COMMERCIAL 2.5 to 25 Megawatts Thermal 1.5 to 15 Tons Per Day Hydrogen Output UTILITY COMMERCIAL 100 to 550 Megawatts Thermal 60 to 320 Tons Per Day Hydrogen Output COMPLETED RESEA RCH STA GE SUB-PIL OT SCALE PIL OT SCA LE Laboratory Scale Steam & Hydrogen 25 Kilowatts Thermal (National Carbon Capture Center in Alabama) TM IN PROGRESS

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 1 3 G L O B A L L E A D E R I N C L E A N P O W E R P R O D U C T I O N T E C H N O L O G I E S — O U R C L I M AT E B R I G H T ™ S U I T E • B&W is at the forefront of developing CO2 capturing technologies • Multiple technologies ready for commercial demonstration • 93 active patents related to carbon capture technology • Positioned to provide critical solutions to meet global climate goals BrightLoop™ HYDROGEN PRODUCTION OxyBright™ OXYGEN-FUEL COMBUSTION SolveBright™ POST-COMBUSTION CARBON CAPTURE BrightGen™ HYDROGEN COMBUSTION Long Duration Energy Storage Green Steam Direct Air Capture HOT SAND SILO COLD SAND SILO EMERGING TECHNOLOGIES B&W’S PORTFOLIO OF CLEAN POWER PRODUCTION SOLUTIONS CONTINUES TO EVOLVE TO REACH CUSTOMERS AT ALL STAGES OF THEIR ENERGY TRANSITION.

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 1 4 G L O B A L L E A D E R I N C O M P R E H E N S I V E WA S T E - T O- E N E R GY S O L U T I O N S FIELD SERVICES COMPONENT & SYSTEM UPGRADES CONTROL SYSTEMS REPLACEMENT & SPARE PARTS OPERATION & MAINTENANCE DynaGrate® combustion grate DynaDischarger® ash removal Water-cooled wear zones and Inconel® corrosion protection VoluMix® system for improved combustion Fabric filter baghouse Wet scrubber with ADIOX® including energy recovery On-line boiler washing system Selective non-catalytic reduction (SNCR) NOx control DynaFeeder® waste fuel feeder system Energy storage systems Carbon capture solutions Dry cooling systems

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 1 5 N E T -N E G AT I V E C A R B O N I N T E N S I T Y F O R B I O M A S S A N D M U N I C I PA L S O L I D WA S T E OxyBright with B&W’s biomass-fired BFB boiler produces carbon negative electricity with a -2,500gCO2e/kWh carbon intensity OxyBright with B&W’s WtE solution could produce carbon negative electricity with a -1,000 gCO2e/kWh carbon intensity Our negative carbon intensity (-2500 gCO2e/kWh) is nearly seven times more negative than the US grid is positive (+373 gCO2e/kWh)

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 1 6 B & W ’ S WA S T E - T O- E N E R GY T E C H N O L O GY R E D U C E S M E T H A N E E M I S S I O N S • Methane has 84 times the Global Warming Potential (GWP) of CO2 i • Annual additions to landfills in the U.S.ii produce emissions equivalent to 10 million cars • Landfills in the U.S.iii emit more than 330 million tons of 20- year basis GWP each year, roughly equal to 70 million carsiv • Waste-to-Energy (WTE) avoids landfilling while producing baseload clean energy WTE TECHNOLOGIES • Boiler/steam generation island • DynaGrate® combustion grate • Fuel handling systems • Emissions control equipment • B&W’s state-of-the-art technology has been installed in more than 500 units in more than 30 countries, including: • The most recent WTE facility in the U.S. (Palm Beach Renewable Energy Facility, Florida) • One of the world’s largest waste treatment facilities in the world (Shenzhen East, China) i Anthropogenic and Natural Radiative Forcing. In: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Stocker, T.F., D. Qin, G.-K. Plattner, M. Tignor, S.K. Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex and P.M. Midgley (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA. https://www.ipcc.ch/site/assets/uploads/2018/02/WG1AR5_Chapter08_FINAL.pdf; 20-year basis ii EIA Biomass Explained: Waste-to-energy (Municipal Solid Waste), November 29, 2020 https://www.eia.gov/energyexplained/biomass/waste-to-energy.php iii EPA Landfill Methane Outreach Program: Project and Landfill Data by State; https://www.epa.gov/lmop/project-and-landfill-data-state#:~:text=The%20LMOP%20Landfill%20and%20Landfill,more%20than%202%2C600%20MSW%20landfills and EPA U.S. Greenhouse Gas Inventory 2020, Chapter 7: Waste, Section 7.1 Landfills (CRF Source Category 5A1) iv Equivalent car emissions calculated using EPA metric of 4.6 metric tons of CO2 per year per passenger car B&W IS ACTIVELY DEPLOYING TECHNOLOGY THAT CURBS THE GLOBAL WARMING IMPACT OF METHANE

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 1 8 C O N S O L I DAT E D F I N A N C I A L S U M M A RY ($ in millions) Twelve Months Ended December 31, 2022 Twelve Months Ended December 31, 2021 Twelve Months Ended December 31, 2020 Revenue $ 889.8 $ 723.4 $ 566.3 Operating Income (loss) $ (4.2) $ 20.8 $ (1.7) Net Income (loss) $ (26.6) $ 31.5 $ (10.3) Net income (loss) attributable to stockholders of common stock $ (37.7) $ 21.8 $ (10.3) Adjusted EBITDA $ 72.4 $ 70.6 $ 45.7 Adjusted EBITDA Margin % 8.1% 9.8% 8.1% Note: 2020 Reported results include the recognition in Q3 2020 of a $26.0 million non-recurring loss recovery settlement related to certain historical EPC loss contracts; figures may not be clerically accurate due to rounding; see SEC financial filings and/or slides in Appendix for reconciliation of non-GAAP measures; COVID-19 adversely impacted all segments in 2020 and 2021.

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 1 9 C A P I TA L S T R U C T U R E ($ in millions) As of December 31, 2022 CAPITALIZATION: Total Debt $ 353.00 Cash, cash equivalents and restricted cash 113.50 Net Debt $ 239.50 TOTAL DEBT LEVERAGE: LTM 12/31/2022 Adjusted EBITDA(1) 72.40 Net Leverage(2) 3.31x Note: Figures may not be clerically accurate due to rounding. (1) See SEC financial filings and/or slides in Appendix for reconciliation of non-GAAP measures. (2) Net Debt compared to LTM 12/31/2022 Adjusted EBITDA.

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 2 1 L E A D E RS H I P T E A M Chairman and Chief Executive Officer Kenny Young Executive Vice President and Chief Financial Officer Lou Salamone Executive Vice President and Chief Operating Officer Jimmy B. Morgan Executive Vice President, General Counsel and Corporate Secretary John J. Dziewisz Chief Strategy and Technology Officer Brandy Johnson Vice President, Corporate Operations Gillianne Hetrick Senior Vice President, Clean Energy Joe Buckler Senior Vice President, Thermal Chris Riker Vice President, Corporate Development Sarah Serafin

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 2 2 C O R P O R AT E G OV E R N A N C E Joseph Tato Rebecca Stahl Chairman and Chief Executive Officer Kenny Young Henry Bartoli B O A R D O F D I R E C T O R S Alan Howe Philip Moeller Peter O’Keefe Phillip Piddington Homaira Akbari Rod O’Connor A D V I S O R Y B O A R D Eric Powell

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 2 3 A D J U S T E D E B I T DA R E C O N C I L I AT I O N (1) ($ in millions) Twelve Months Ended December 31, 2022 (4) Twelve Months Ended Dec 31, 2021 Twelve Months Ended Dec 31, 2020 (3) Net income (loss) $ (26.6) $31.5 $ (10.3) Interest expense 50.8 41.4 60.7 Income tax (benefit) expense 11.0 (2.2) 8.2 Depreciation & amortization 24.0 18.3 16.8 EBITDA 59.2 89.0 75.4 Goodwill impairment 7.2 — — Benefit plans, net (37.5) (48.1) (5.6) Gain on sales, net (2.6) (14.0) (3.2) (Gain) loss on debt extinguishment — (6.5) 6.2 Stock compensation 8.7 10.5 4.6 Restructuring activities and business services transition costs 8.5 10.7 11.8 Advisory fees for settlement costs and liquidity planning 1.5 5.5 6.4 Litigation legal costs 10.7 4.9 2.1 Acquisition pursuit and related costs 5.5 4.8 — Contract Disposal (O&M) 3.0 — — Product development (2) 4.1 4.7 — Foreign exchange 0.6 4.3 (58.8) Financial advisory services 1.4 2.7 4.4 Contract step-up purchase price adjustment 1.7 — — Loss from business held for sale — 0.5 0.5 Other – net 0.4 1.6 3.7 Income from discontinued operations — — (1.8) Adjusted EBITDA $72.4 $70.6 $45.7 1) Adjusted EBITDA is a non-GAAP Measure; figures may not be clerically accurate due to rounding. 2) Cost associated with development of commercially viable products that are ready to go to market. 3) 4) Adjusted EBITDA for the twelve months ended December 31, 2020, include the recognition of a $26.0 million loss recovery settlement related to certain historical EPC loss contracts in the third quarter, as previously disclosed. Adjusted EBITDA for the twelve months ended December 31, 2022 include a $7.0 million non-recurring gain on sale related to development rights of a future solar project that was sold.

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 2 5 K E Y T E C H N O L O G I E S : S T E A M G E N E R AT I O N Utility Boilers High pressure, high efficiency, high capacity, low emissions Fuel: Coal, oil, natural gas, multi-fuel Natural Gas-Fired and Other Industrial Water-Tube and Fire-Tube Boilers Bottom- or top-supported, shop- or field-assembled Fuel: Natural gas, oil, CO, waste heat and gases Heat Recovery Steam Generator Components Pressure parts, casing, ducting, drums, housing and frames Fuel: Waste heat and gases Waste-to-Energy Boilers Reduces dependency on landfills and reduces methane gas emissions Fuel: MSW, RDF Biomass-Fired Boilers Carbon-neutral technology Fuel: Wood, wood waste, straw, sludge Process Recovery Boilers Single-drum, industry-standard unit for improved mill operation Fuel: Black liquor

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 2 6 K E Y T E C H N O L O G I E S : R E N E WA B L E C O M B U S T I O N G R AT E S • Large installed base with diverse set of customers • Grate design allows for high availability and long operational time, leading to reduced O&M cost • High thermal efficiency and low emissions • Fuel flexibility • Factory assembled modules reduce field construction D Y N A G R A T E ® C O M B U S T I O N G R A T E A MARKET LEADER WITH DIFFERENTIATING TECHNOLOGY IN WASTE-TO-ENERGY SOLUTIONS

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 2 7 K E Y T E C H N O L O G I E S : E M I S S I O N S C O N T R O L S • Wet ESPs • Dry Sorbent Injection (DSI) SO3 / Acid Mist Control PURPOSE TECHNOLOGY SOLUTION Particulate Control • Pulse Jet Fabric Filters (PJFF) / Baghouses • Wet and Dry Electrostatic Precipitators (ESPs) • Wet Particulate Scrubbers • Multiclone® Dust Collectors • Selective Catalytic and Non-catalytic Reduction (SCR/SNCR) • Low NOX Burners and Combustion Systems NOx Control • Wet or Seawater Flue Gas Desulfurization (FGD) Systems • Semi-dry FGDs (Spray Dry Absorbers, Circulating Dry Scrubbers) • Wet ESPs and Dry Sorbent Injection (DSI) SO2 / Acid Gas Control PURPOSE TECHNOLOGY SOLUTION • Powdered Activated Carbon Injection • Absorption Plus™, MercPlus™, Mitagent™ Additives • GMAB™ ADIOX® and MERCOX™ technologies Mercury, Dioxins, Furans • Wastewater Evaporation System (WES) via Spray Drying • Air-Cooled Condensers Wastewater Elimination Pre-treatment for Post-Combustion Carbon Capture • Wet and Dry Scrubbers, Sorbent Injection, ESP Fabric Filters, SCRs • Complements SolveBright process, other post-combustion technologies

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 2 8 K E Y T E C H N O L O G I E S : S U B M E R G E D G R I N D C O N V E Y O R A S H H A N D L I N G • Lower equipment cost • Lower installation cost • Ability to utilize existing hoppers and gate valves • No hopper modifications • Short outage time • Short lead time • Available redundancy under the boiler • Lower O&M costs Designated to meet current and future U.S. regulatory requirements for ash handling with: AN INNOVATIVE SOLUTION TO ELIMINATE ASH PONDS

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 2 9 K E Y T E C H N O L O G I E S : F L U E G A S T R E AT M E N T F O R C A R B O N C A P T U R E • To optimize carbon capture on solvent-based scrubbing technologies, reductions in various pollutants found in the incoming flue gas are required • Our solutions include technologies for acid gases, particulate and acid mist, NOx , mercury, and flue gas moisture THE WORLDWIDE LEADER IN FLUE GAS PRE-TREATMENT TECHNOLOGIES FOR POST-COMBUSTION CARBON CAPTURE

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 3 0 K E Y T E C H N O L O G I E S : C O O L I N G S Y S T E M S MATERIAL OPTIONS: WOOD | CONCRETE | FIBER-REINFORCED POLYMER (FRP) NATURAL DRAFT/HYPERBOLIC Fanless design provides low power, noise and maintenance, as well as long operating lifecycle MECHANICAL DRAFT Counterflow for cost-effective thermal performance; crossflow for low energy consumption and operating costs WET AIR-COOLED CONDENERS Water preservation technology customized for high-performance, long-life, low noise, corrosion-resistant applications AIR FIN COOLERS Cost-effective designs using embedded or wrapped tubes to meet required thermal, mechanical, noise, and space requirements DRY OPTIMIZATION SERVICES Specialized services to maximize plant performance and minimize costs and maintenance

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 3 1 K E Y C A PA B I L I T I E S : G L O B A L PA R T S & S E RV I C E Adding value through constructability: Safe execution of new installation, retrofits, system maintenance/repair, plant modifications CONSTRUCTION OPTIMIZATION SYSTEMS Enhancing efficiency with proven technology: Diagnostic, monitoring, tuning and control systems for combustion, cleaning and cooling equipment UPGRADES & RETROFITS Maintaining/improving plant operation: Projects for extending the life of power, process and environmental equipment ENGINEERING SERVICES Evaluating options for improved performance: Expert people, tools and processes to measure, model, design, deliver, train, and project manage REPLACEMENT PARTS Supplying components for system reliability: High-quality standard or custom-engineered pressure and non-pressure parts

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 3 2 K E Y T E C H N O L O G I E S : I G N I T O RS , F L A M E S C A N N E RS A N D C O N T R O L S • Natural gas conversions from oil- or coal-firing • Alternative energy fuels such as hydrogen, bio-diesel, methanol, and bio-gas • Burner management and controls for complete turnkey system capability • Flame scanning capability can be effectively implemented on any industrial application • Technologies can be utilized for new construction or retrofit projects • Safety standards conforming to National Fire Protection Association (NFPA) classes Designed for safety, reliability and fuel flexibility PROVEN TECHNOLOGIES WITH INSTALLATIONS IN MORE THAN 70 COUNTRIES, INCLUDING MORE THAN 11,000 IGNITORS

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 3 3 K E Y T E C H N O L O G I E S : E N G I N E E R E D P R O D U C T S A N D H RS G C O M P O N E N T S E N G I N E E R E D P R O D U C T S A N D S O L U T I O N S , Q U A L I T Y M A N U F A C T U R I N G PROVEN EXPERIENCE IN HEAT TRANSFER AND STEAM GENERATING EQUIPMENT FOR USE IN A WIDE RANGE OF APPLICATIONS. • Comprehensive mechanical and process design upgrades • Chanute, Kansas, manufacturing facility has produced more HRSG components than any other facility in North America – Pressure part modules and coils, superheaters, economizers – Finned tubing – Casing – Ducting – Steam drums – Housing and frames • Firetube and watertube package boilers • Sulfuric acid plant capabilities

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 3 4 K E Y C A PA B I L I T I E S : S O L A R I N S TA L L AT I O N ENGINEERING AND PROCUREMENT • Project Cost Analysis • Grid Integration and Interconnection • Technical Evaluation • Push-Pull Testing • AC and DC Engineering • Permitting and AHJ Permissions • Logistics • Strategic Procurement of Structural Components and Electrical BOE CONSTRUCTION • Subcontractor Management • On-Site Construction Management • Coordination and Supervision of Projects • Utility Interconnections • Quality and Commissioning Control • Electrical and Structural QA/QC • BOE BENEFITS OF A SOLAR ADDITION: 1. Powering up/down operations 2. Supplemental/plant energy source 3. Additional MW/GW output INDUSTRY-LEADING EPC SERVICES High efficiency. Low emissions. Integrated solutions for clean power production.

© 2023 Babcock & Wilcox Enterprises, Inc. All rights reserved. B A B C O C K & W I L C O X E N T E R P R I S E S , I N C . 3 5 K E Y T E C H N O L O G I E S : L O N G D U R AT I O N E N E R GY S T O R A G E • B&W offers Pressurized or Atmospheric Fluidized Bed technology for long duration energy storage • B&W also has an exclusive option to license NREL’s Enduring long duration energy storage technology NREL Enduring: (8-100 hours storage) • Electric heater (stores heat in sand) • Air Brayton Combined Cycle LONG DURATION ENERGY STORAGE SMOOTHS RENEWABLE ENERGY PEAKS AND BRIDGES WEATHER EVENTS