Stephan Simmang in

Stephan Simmang

Critic · DISC type C
Group CIO at Boerse Stuttgart Group
📍 Stuttgart, Baden-Württemberg, Germany

Stephan Simmang is the Group CIO at Boerse Stuttgart Group, leveraging deep expertise from his tenure as CTO and interim Co-CEO at flatexDEGIRO and nearly two decades in leadership at Goldman Sachs. An alumnus of RWTH Aachen University, he has a distinguished career spearheading technological strategy in the European financial industry.

He believes AI is not an IT topic but a business topic, requiring integrated teams of developers and business staff to master its challenges and unlock opportunities.

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Experience
32 Years
Current Role
Group CIO
Job Level
Leadership
Location
Stuttgart, Baden-Württemberg, Germany
Personality Overview

How Stephan shows up

Objective Thinker
ROI Driven
Precise

They enjoy working alone and do not rely on others very often. Unless the value is proven by data, they are unlikely to value fancy features. They prefer to do logical analysis and value evidence over emotions.

Priorities

Topics Stephan cares about

AI in Finance
He is a public speaker on AI's role in finance, advocating that it is a core business topic essential for driving innovation and creating new opportunities.
Fintech Innovation
His career focus has been on driving "innovative change." He was instrumental in building a German fintech into one of Europe's leading online brokers.
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Career

Work history

8-2025
Group CIO
Boerse Stuttgart Group
4-2024 - 7-2025
CTO (& interim Co-CEO)
flatex AG
11-2020 - 8-2025
CTO
flatexDEGIRO AG
6-2016 - 7-2025
Group CTO, Divisional Board Member
flatex AG
1-2007 - 6-2016
Executive Director Banking Divisional Systems
Goldman, Sachs AG
In the press

Media appearances

Boerse Stuttgart Group setzt strategische Neuaufstellung des Managements fort. Featured in Presseportal
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Neue Führungsriege: Stephan Simmang wird neuer CIO der Boerse Stuttgart Group. Featured in IT Finanzmagazin
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Education
Masters
RWTH Aachen University
Social presence
in
Behavioral profile

DISC profile (public)

C

Calculativeness (C)

Calculativeness (C) reflects the degree to which a person is likely to be cautious, systematic and analytical. Those scoring high tend to emphasise quality and accuracy.

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