Employees
~19,000
Revenue
€5.27B (2025)
People served
1.9M in Vienna metro
Sectors
Energy, transport, mobility, parking, property management
Frameworks
CSRD, EU Taxonomy, TCFD
Key outcomes
01
Improved ability to assess and manage physical climate risks across critical operational sites in Austria and strengthened their protection
02
Strengthened regulatory readiness, including Corporate Sustainability Reporting Directive (CSRD) and EU Taxonomy requirements
03
Efficient integration of climate risk insights into strategic planning
04
Increased confidence in sustainability and risk decisions
The context
Critical infrastructure for 1.9 million people — and a changing climate.
Wiener Stadtwerke employs approximately 19,000 people and is one of Europe’s largest municipal infrastructure and utility groups. Through its energy, transport, mobility, parking, and funeral services businesses, the Group generated €5.27 billion in revenue in 2025 and serves the Vienna metropolitan area through an extensive network of energy, grid, and public transport infrastructure.
With a large portfolio of operational sites, Wiener Stadtwerke faces significant exposure to physical climate risks such as extreme weather events, temperature shifts, and water-related stress factors. These risks are not only operational in nature but also strategically important from a regulatory perspective, particularly in the context of evolving requirements such as CSRD reporting. At the same time, protecting the long-term value and resilience of Wiener Stadtwerke’s infrastructure is a core strategic priority.
The Challenge
Climate data isn’t the same as
decision-ready intelligence.
Wiener Stadtwerke already recognized that climate-related risks would increasingly shape both regulatory obligations and operational resilience. The challenge was the difficulty of translating climate risk data into actionable insights that could directly support strategic decision-making.
Without a reliable framework, key questions remained difficult to answer consistently: How exposed are specific assets to physical climate risks? What does this mean for long-term infrastructure planning? How can risk insights be reliably integrated into decision-making processes?
Wiener Stadtwerke needed more than data. It needed a way to transform complex climate risk information into insights that could directly support risk management, sustainability reporting, and strategic planning. Otherwise, climate risks remained partially visible but not fully actionable at a strategic level. The critical gap being the ability to quantify risks consistently, interpret them in a business context, and integrate them into decision workflows.
Structuring climate risk data in a usable, consistent format.
Supporting the vulnerability assessment for subsidiaries with asset-level data.
Wiener Stadtwerke carried out a vulnerability assessment together with external consultants for its subsidiaries — including Wiener Linien. refinq provided granular climate risk data tailored to individual assets, enabling the assessment to go beyond group-level exposure to site-specific findings.
Three building blocks of the Wiener Stadtwerke implementation.
The Impact
From abstract risk awareness to precise, asset-level assessment.
The breakthrough came when Wiener Stadtwerke was able to move from abstract risk awareness to precise, asset-level risk assessment. Climate risk insights are no longer static reports — they are active inputs into ongoing decision-making processes. The discussion shifted from “Climate risk is a general concern for our infrastructure” to “Which specific assets are exposed, and what does that mean for our investment and planning decisions?”
Instead of discussing climate risk in general terms, Wiener Stadtwerke could now identify specific vulnerabilities across locations, assess exposure with greater precision, and evaluate implications for future planning and investment decisions.
What refinq delivers
CSRD / ESRS E1 · EU Taxonomy (CRVA, DNSH) · TCFD · Austrian utility regulator
What Wiener Stadtwerke can do now.
With refinq, Wiener Stadtwerke has significantly strengthened its ability to manage physical climate risks across its operations. The platform enables teams to:
01
Assess and monitor climate risks with precision.
02
Integrate insights into strategic planning processes.
03
Support compliance with regulatory frameworks such as CSRD.
04
Make more informed, forward-looking infrastructure decisions.
Wiener Stadtwerke Perspective
What the team at Wiener Stadtwerke says.
Florian Sigmund
Wiener Stadtwerke
