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Single Family OfficePuts its own capital into companiesLAST VERIFIED Oct 2026 · 6 SOURCES

Also known as S. K. Management- und Beteiligungs GmbH, SK Gruppe

Family office of the Kiener family (SK Gruppe) in Baden-Baden; invests in private equity funds and direct stakes, real estate incl. mezzanine for developers, and listed securities.

USEFUL FOR Fund managers raising capital · Business owners seeking a long-term partner · Co-investors

Family & background

FAMILY
Kiener
WEALTH ORIGIN
InFoScore receivables and information services group, merged into arvato infoscore (Bertelsmann) in 2005 and fully sold to Bertelsmann in 2009
HEADQUARTERS
Baden-Baden, Germany

Investment approach

GEOGRAPHY
GermanyEuropeNorth America
ROUTES
Companies (own capital) · Funds (as LP)
STRATEGIES
Direct investmentsPrivate equityReal estatePublic equitiesPrivate credit

Overview

S. K. Management- und Beteiligungs GmbH (SKMB, Amtsgericht Mannheim HRB 202300) is the umbrella company and external face of the SK Gruppe, the private wealth management of the family of founder Sigmund Kiener in Baden-Baden. The wealth stems from the InFoScore group, merged with parts of arvato/Bertelsmann in 2005 and sold to Bertelsmann in 2009. It invests across direct and fund-based private equity, real estate (including mezzanine financing for developers) and listed equities and bonds, with a deliberately high private equity share. Direct stakes target companies with roughly 100+ employees or EUR 15m revenue, preferring B2B services, financial and marketing services and e-commerce.

Investment thesis

Diversification across holdings, real estate and liquid financial assets, with an above-average private equity share; direct stakes as a partner to founder-led companies of about 100+ employees or EUR 15m revenue in B2B services, financial and marketing services and e-commerce; PE funds (buy-out, Mittelstand, distressed, secondary, seed/growth) in Germany, Europe and the USA.

Holdings & investments

INVESTMENT ARMS & VEHICLES

  • Charitable foundation of the SK Gruppe (education, arts and culture, science, entrepreneurship)

People

  • Sigmund Kiener
    Founder and Managing Director · source
  • Florian Schulte
    Managing Director · source

Frequently asked questions

SK Management is a single family office based in Baden-Baden, Germany.

SK Management invests on behalf of the Kiener family (InFoScore receivables and information services group, merged into arvato infoscore (Bertelsmann) in 2005 and fully sold to Bertelsmann in 2009).

SK Management invests its own capital into companies and in third-party funds as an LP. Its stated asset mix includes direct investments, private equity, real estate, public equities and private credit.

SK Management invests in Real Estate & PropTech.

Key people at SK Management include Sigmund Kiener (Founder and Managing Director) and Florian Schulte (Managing Director).