Investor Presentation, May 2026

INVESTOR PRESENTATION | MAY 2026

1

wienerberger at a glance

EUR 4.6bn

Revenues

>200

>20,000

employees

2025 16.5%

Operating EBITDA margin

production

sites

~30

Countries

in Europe, India, North America

2026

Signing of the Italcer Acquisition

2

We provide…

› Solutions for the Building Envelope

› Infrastructure Solutions for Water and

Energy Management

… in Europe, North America and India

3

112,000

houses built

Solutions for the

Building Envelope

ROOF, WALL & FAÇADE and PAVERS

› World's biggest brick manufacturer

› Market leader roof tiles Europe

› Market leader pavers Eastern Europe

24

countries

200

production sites

373,000

houses roofed

11.0

million m2

laid/paved

*Numbers relate to 2025 4

Roof Solutions

Segments with significant growth potential

Solar

› Mounting systems, custom/standard modules, inverters/storage, flashing, services

› PV systems and services to become a full energy solution provider

› Total residential PV market of ~EUR 2.5bn

Roof tiles and accessories

› Roof tiles, ridge/hip, verge/ventilation

› Innovative & aesthethic solutions for pichted roofs

› Total pitched roof market ~EUR 6bn. Roof components

› Chimney flashing, storm fixation, roof

underlays, snow retention, roof windows, etc

› Roof components as part of the solution ensuring functional application

› Total roof component market ~EUR 6bn

5

Façade & Wall Solutions

Enabling sustainable and automated building

Automatization

› Robotic systems & prefabrication

› Increased efficiency on-site

› Solution to skilled labour shortage

Facade solutions

› Lifespan > 100 years, minimal maintenance

› Durable protection against weather

› Aesthetic design element for interior & exterior

Wall solutions

› 150+ year lifecycle, recyclable & reusable

› High sound insulation and energy efficiency

› Best in class CO2 footprint as wall solution

› Fast installation

6

21

countries

Infrastructure Solutions for

Water and Energy Management

PIPING SOLUTIONS

41

production sites

466,000km

of pipes installed

› Leading provider of pipe system solutions for

infrastructure, buildings, and agriculture

*Numbers relate to 2025

This equals

>11

circumnavigations of the globe

7

Piping Solutions

Addressing segments with structurally growing end markets

Climate resilient infrastructure

› Piping solutions for water supply and sewage networks

› Storm- and rainwater management

› Monitoring systems/smart solutions

› Piping solutions for irrigation systems

Energy Transition

› Cable protection and wells for wind/solar power

› Flexible pipe systems for hydrogen applications

Resource-efficient buildings

› Cooling and heating, siphonic roof drainage, silent water discharge, rainwater collection/reuse, etc

8

Products

Surface

2%

Roof

27%

Strength through diversification

Revenue

split 2025

Facade

& Wall

42%

Pipes

29%

Europe East 26%

Europe West 59%

Revenue

split 2025

North America 15%

Regions

wienerberger offers products and solutions for the building envelope and water and energy management in three geographical regions.

Shift from product driven

Operating EBITDA margin 2025

15%

14%

22%

Operating EBITDA margin 2025

15%

18% 19%

to solution-led growth.

Roof Facade & Wall

Pipes

Europe West

Europe East

North America

9

WHY INVEST IN WIENERBERGER?

10

Added value for shareholders: Our three-pillar strategy

Organic growth

through innovation

Higher returns

through Operational excellence

External growth

through M&A

All our activities are subject to clear sustainability goals

Strong innovative role Self-help programs drive efficiency improvements

Proven value-accretive M&As

11

Innovation

Share of Innovative Products of Revenue

in 2025: >34%

TARGET 2026: >35%

We grow with innovative sustainable system solution for the challenges of today and tomorrow

12

Strengthening efficiency

Operational excellence

› Production measures and capacity optimization over the last years

›

EBITDA contribution 2025: cost savings of EUR~55m

Fit for Growth

› Program started in Q3 2025

› Process optimization across all organizational levels - from holding to operations

› Ensuring continued value creation in a challenging market environment

›

Expected savings in the range of EUR15-20m annually

Continuous efficiency improvements along our entire value chain

13

Recent M&A supporting our transformation

4 10

2

4 5

6

~5x

EV/EBITDA

after 3 years and synergies

8 1 3

4

7

9

4 9

4

1 Deal value relates a 25% stake in the company

14

2 Signing February 2026

3 Pre acquisition year

ACQUISITIONS | NEWS GROUP

STRENGTHENING OUR POSITION IN WATER MANAGEMENT

Acquisition of

NEWS Group

Turnover 2025: EUR >20m

Closing 30 April, 2026

Leading provider of sustainable wastewater solutions in Sweden and the entire Nordic region

Growing demand for sustainable, decentralized wastewater solutions as a result of new regulatory requirements and the need to modernize an aging infrastructure

15

ACQUISITIONS | ITALCER

GROWTH THROUGH INCREASED MARKET SHARE IN RENOVATION

CLOSING APRIL 30, 2026

› Fast integration and instant margin increase as of day 1

› Value creation through "buy-and-build"

strategies and synergies of ~ EUR 10m

› Synergized EV/EBITDA multiple of ≤ 5.6x

› Serves as a new scalable growth platform

› Strong balance sheet allows acquisition without raising new capital

› EUR 160m cash payment in Q2 for 50% +1 share

› EUR 240m net debt from Italcer through consolidation

› Call option to acquire the remaining shares on pre-agreed terms in late Q1/early Q2 2027

16

Growth trough diversification

› From Single Product to Multi-Solution Business in structurally growing end markets

› Renovation & infrastructure are key contributors to our value

creation, reduces cyclicality and strengthens margins

15%

20% 65%

19%

43%

38%

2012 2025

Renovation

Infrastructure

New build

17

From single product offer to multiproduct /

multi-solution business

Pitched roof solutions

Innovative Wall Solutions

Water and energy piping infrastructure

18

Value creation for shareholders

Strong track record

Revenue

Operating EBITDA

and margin

Dividend

+5% CAGR +7% CAGR +15% CAGR

EUR 4.6bn

EUR 754m

EUR 0.95

EUR 3.0bn

EUR 0.27

EUR 404m

2016 2025

2016 2025

2016 2025

19

Value creation for shareholders

› Dividend for the FY 2025 of EUR 0.95 per share

› Share buyback EUR 30m

(December 30, 2024-February 7, 2025)

› Payout ratio of 28% of free cash flow

213

86 95

95 100 104 104

20 26 32 30

0

2020 2021 2022 2023 2024 2025

Dividend payout Share buyback

20

SUSTAINABILITY PROGRAM 2023-2026

SOCIAL TARGETS 2026

ENVIRONMENTAL TARGETS 2026

Diversity & Inclusion

Development and implementation of inclusion and diversity action plan in all countries

(2023 - 2026)

Every action plan will include an equal pay and equal opportunity policy

Health & Safety

20,000

Visible leadership hours per

year (2023 - 2026)

Training & Development

18 hrs

of training per employee per

year (2023 - 2026)

500

apprentices cumulatively trained (2023 - 2026)

30,000

cumulative number of training hours for installers (2023 - 2026)

Decarbonization and Energy Mix

- 25%

reduction of CO₂ emissions scope 1&2 (2020 - 2026)

- 10%

reduction of CO₂ emissions scope 3 (2022 - 2026)

15%

of renewable energy used in own operations

(2023 - 2026)

Biodiversity

10%

improvement of fauna, through implemented biodiversity plans

for all production plants

(2023 - 2026)

At least one

biodiversity ambassador

for each location worldwide

100,000

trees planted, equaling to one tree per employee each year

Water Management

35 million m3

of water harvested, retained and saved through our products in infrastructure and agriculture (2023 - 2026)

- 15%

reduction of water consumption in own operations

(2023 - 2026)

(2022 - 2026)

Social Commitment

200

housing units per year built with our products for people in need in our local markets

Circularity

> 80%

of sales from highly durable products (>100 years)

> 90%

of products sold recyacrleable and/or reusable (2022 - 2026)

Revenues from Products Supporting Net Zero Buildings

75%

of total revenue coming from building products contributing to Net Zero Buildings

Waste Management

- 15%

reduction of waste in own operations (2023 - 2026)

21

OUR PATH TO NET ZERO

2026 2030

-25%

Scope 1+2 emissions

-10%

Scope 3 emissions

-42%

Scope 1+2 emissions

-25%

Scope 3 emissions

Pillars

Optimized plant design Fuel transformation

Aligned with

1.59C

Paris Agreement

Efficient product design

Strategic partnerships in scope 3

EU target 2050 net zero

SBTi

committed

22

SUSTAINABILITY PROGRESS 2025

REVENUE FROM PRODUCTS

SUPPORTING NET ZERO BUILDINGS

REDUCTION

OF SCOPE 1 & 2 EMISSIONS

Base year 2020

69%

Progress 2025

74.1%

Target 2026

75%

Base year 2020

2.6

million tons

Progress 2025

- 20.7%

reduction

Target 2026

- 25%

reduction

SALES FROM HIGHLY DURABLE PRODUCTS (>100 YEARS)

REDUCTION

OF SCOPE 3 EMISSIONS

Base year 2023

81.3%

Progress 2025

83.9%

Target 2026

>80%

Base year 2022

3.2

million tons

Progress 2025

- 25.2%

reduction

Target 2026

- 10%

reduction

SOLD PRODUCTS THAT ARE RECYCLABLE AND/OR REUSABLE

SHARE OF RENEWABLE ENERGY IN OWN OPERATIONS

Base year 2023

92%

Progress 2025

92.9%

Target 2026

>90%

Base year 2023

9.8 %

share

Fortschritt 2025

12.6%

share

Target 2026

15%

share

23

BUSINESS UPDATE Q1 2026

24

Q1 2026 - HIGHLIGHTS

Q1 NOT A SURPRISE

› Weak Q1 performance in line with guidance

› Significant volume pick up in March, following a weather impacted January and February

› FY 2026 EBITDA guidance reiterated, although limited visibility given Middle East conflict

› Focus remains on strategic execution and integration of Italcer, as well as mitigating actions

25

Q1 2026 - HIGHLIGHTS

Volume development

Wienerberger Group

Development 2026 (vs 2025)

Q1 2026

vs Q1 2025

-6%

Q1 2026

ANTICIPATED WEAK START OF THE YEAR DUE TO WEATHER CONDITIONS

Note: Net Sales 1 3rd revenue figures // Rounding differences may arise from automatic processing of data

26

Development 2025 (vs 2024)

Strong Q1 2025

5%

0%

-5%

5%

vs Q1 2024

2%

1%

0%

Q1 2025 H1 2025 Q1-Q3 2025 FY 2025

BUSINESS ENVIRONMENT Q1 2026 - PER REGION

BUSINESS ENVIRONMENT - EUROPE EAST

MARKET INDICATORS

TOTAL HOUSING STARTS

(EST. FY '26 vs FY '25)

CIVIL ENGINEERING

CONSTRUCTION OUTPUT

(EST. FY '26 vs FY '25)

LONG-TERM BORROWING RATE

(MARCH '26)

BUSINESS DEVELOPMENT

EUROPE EAST

0%

CERAMICS

PIPES

Infrastructure markets remained broadly stable.

27

*30-year swap rate incl. premium spread of 150bps, source of swap rates: LSEG Refinitiv (Treasury)

Note: Market data acquired from Euroconstruct, ECB, U.S. Census Bureau, or Management Estimate // Rounding differences may arise from automatic processing of data

BUSINESS ENVIRONMENT Q1 2026 - PER REGION

BUSINESS ENVIRONMENT - EUROPE WEST

MARKET INDICATORS

TOTAL HOUSING STARTS

(EST. FY '26 vs FY '25)

CIVIL ENGINEERING

CONSTRUCTION OUTPUT

(EST. FY '26 vs FY '25)

LONG-TERM BORROWING RATE

(MARCH '26)

BUSINESS DEVELOPMENT

EUROPE WEST

CERAMICS

PIPES

Jan-Feb slow due to weather. March demand supported by customer stock building ahead of expected price increases.

28

*Including the shift towards multifamily houses **30-year swap rate incl. premium spread of 150bps, source of swap rates: LSEG Refinitiv (Treasury)

Note: Market data acquired from Euroconstruct, ECB, U.S. Census Bureau, or Management Estimate // Rounding differences may arise from automatic processing of data

BUSINESS ENVIRONMENT Q1 2026 - PER REGION

BUSINESS ENVIRONMENT - NORTH AMERICA

MARKET INDICATORS

TOTAL HOUSING STARTS

(EST. FY '26 vs FY '25)

LONG-TERM BORROWING RATE

(MAR '26)

VOLUME DEVELOPMENT

NORTH AMERICA

CERAMICS

PIPES

Volumes impacted by weather-related disruptions in piping and infrastructure projects.

29

*30-year mortgage rate as reported by the Federal Home Loan Mortgage Corporation in the U.S.

Note: Market data acquired from Euroconstruct, ECB, U.S. Census Bureau, or Management Estimate // Rounding differences may arise from automatic processing of data

FINANCIALS Q1 2026 - GROUP

Q1 2026 RESULTS HIGHLIGHTS

Revenues

(in EURm)

-7%

1,099

1,025

Q1 2025

Q1 2026

30

Operating EBITDA

(in EURm)

-26%

130

97

11.8%

9.4%

Q1 2025

Q1 2026

FINANCIALS Q1 2026 - GROUP

STRONG VOLUME DEVELOPMENT IN MARCH

Q1 2026

Scope

FX

Organic Growth

Q1 2025

+1%

-2%

-6%

1,025

8

-16

1,099 -66

-7%

Revenue Bridge

in EURm

-24%

Q1 2026

Scope

FX

Organic Growth

Q1 2025

9.4%

+1%

-2%

Operating EBITDA Bridge

in EURm

11.8%

97

1

-3

-31

130

-25%

Note: Rounding differences may arise from automatic processing of data Scope effect includes MFP Ltd., Slatek and Veta France

31

FINANCIALS Q1 2026

Q1 PERFORMANCE IN LINE WITH GUIDANCE; MIDDLE EAST INFLATION IMPACT NOT YET VISIBLE

Overall cost inflation

of +2%

Natural gas

positions in Europe

Price increases in implementation across Europe

Supplier contracts under

review

Mitigating measures

32

FINANCIALS Q1 2026 - SEGMENTS

OPERATING SEGMENTS - EUROPE EAST

Revenues

(in EURm)

-7%

271

252

Q1 2025

Q1 2026

Operating EBITDA

(in EURm)

-41%

33

20

12.1%

7.7%

Q1 2025 Q1 2026

33

FINANCIALS Q1 2026 - SEGMENTS

OPERATING SEGMENTS - EUROPE WEST

Revenues

(in EURm)

-3%

649

631

Q1 2025

Q1 2026

Operating EBITDA

(in EURm)

-14%

69

60

10.7%

9.4%

Q1 2025 Q1 2026

34

FINANCIALS Q1 2026 - SEGMENTS

OPERATING SEGMENTS - NORTH AMERICA

Revenues

(in EURm)

-21%

179

141

Q1 2025

Q1 2026

Operating EBITDA

(in EURm)

-37%

28

17

15.4%

12.4%

Q1 2025 Q1 2026

35

OUTLOOK 2026

OPERATING EBITDA GUIDANCE OF ~€ 810 MN

ASSUMPTIONS

› No structural recovery in residential construction

› Flat infrastructure &

renovation market

› Expected inflation covered by price increases

MIDDLE EAST CONFLICT

› Inflation in resins, energy and transport cost as well as traded goods

› High risk of supply chain disruptions

› Limited visibility of total year impact

MITIGATION MEASURES

› Price increases

› Further cost management

› Fit For Growth

36

wienerberger mid-term development 2029

37

MID-TERM DEVELOPMENT 2029

KEY ASSUMPTIONS

wienerberger case in stable market environment

ba2029 se

se ca

Assumptions…

› Flat markets

› No impact from new

building housing policy

› Inflation covered by price increases

› Bolt-on M&A embedded

› Material M&A upside not included

We focus on…

› Outperforming markets

› Realization of synergies from

existing M&As

› Fit for Growth

› Further optimizations and efficiency measures in plant network

38

Note: Operating EBITDA in EUR mn // Rounding differences may arise from automatic processing of data

MID-TERM DEVELOPMENT 2029

WIENERBERGER BASE CASE 2029

in EURm

810 15

40 15 880

25 20

25 950

25 25 1,000

39

Note: Operating EBITDA in EUR mn // Rounding differences may arise from automatic processing of data

MID-TERM DEVELOPMENT 2029

Even in base case

(no market growth continuing recession)

wienerberger

will achieve self-funded substantial growth

Reaching

EUR 1bn

EBITDA

achieving a free cash flow of

EUR > 500m

Reducing its

debt level to

< 1.5 times EBITDA to net debt

40