Our Team


Volker Sack
CEO, Analyst & Co-Founder

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  • Almost 25 years of capital market experience as corporate analyst (equities, credit) including more than 20 years in a management position
  • Coverage: predominantly insurance companies, but also stocks such as Deutsche Post AG, Sartorius AG
  • Research support for numerous capital market transactions, such as IPOs, SPOs, capital increases as well as promissory note loan transactions (SSD)
  • Head of the DVFA Corporate Analysis Commission (German Association of Investment Professionals)


Oliver Drebing
Analyst & Co-Founder

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  • A passion for project work
  • In-depth knowledge of company valuation and experience in assessing business models
  • Generalist, changing sector focus in the course of analyst career: semiconductor industry, renewable energies, mechanical engineering, healthcare, oil & gas, industrial metals, shipping
  • Regularly entrusted with stock coverage on conglomerates (Siemens, GE)
  • View of the markets: confidence tempered by scepticism

Karsten Rahlf
Analyst & Co-Founder

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  • More than 35 years capital market experience, including in management positions and as corporate analyst
  • Coverage: equities, credits, promissory note loans mainly in the consumer and retail goods industries
  • Research support for numerous IPOs, asset management, wealth management

Andreas Schüler
Analyst & Co-Founder

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  • Analyst for German and international stocks since 2017
  • Coverage: predominantly food & beverage industries, consumer goods, mechanical engineering, commodities
  • Capital market support: company valuations, bond issues, IPOs, capital increases
  • Tech- and internet-savvy

Supervisory Board

Achim Heyer
Chairman of the Supervisory Board

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  • Managing Director of Repairon GmbH
  • Just under 20 years professional experience as an auditor, 15 years of which as a partner in a medium-sized auditing company
  • Many years of experience on supervisory boards (administrative board of the Institute of Public Auditors in Germany and supervisory board of CBM Deutschland e.V.)