About us

The Person Behind SIINUS CAPITAL

Founder & Managing Director

Yasin Karaca
Founder & Managing Director

  • Grounded in Practice

    Grounded in Practice

    Yasin Karaca gained many years of practical experience as a real estate advisor, financing specialist, and private real estate investor, working at the critical intersections of the German real estate market. This perspective gave rise to the conviction that investment and asset management should be approached as a single, integrated discipline.
  • 11+ Years of Real Estate & Financing Experience

    11+ Years of Real Estate & Financing Experience

    From property valuation to financing structuring to personal investment — a depth of experience that informs every decision at SIINUS CAPITAL today.
  • Substantial Portfolio Volume Under Management

    Substantial Portfolio Volume Under Management

    Building and managing real estate portfolios across the entire investment cycle — from initial acquisition to the ongoing development of the existing portfolio.

Foundation

  • Yasin Karaca is a graduate of the Cologne Business School (today: CBS University of Applied Sciences), one of Germany's leading private business schools, holding a degree in General Management. This business foundation is complemented by over a decade of hands-on market experience: as an advisor specializing in the professional assessment and structuring of acquisition decisions, as a financing specialist working directly with banks and lenders, and as a private investor who invests his own capital in existing assets and manages them personally. This combination of academic training and practical market expertise forms the analytical and structural foundation on which SIINUS CAPITAL bases its investment decisions.

Die Gründungsidee

  • SIINUS CAPITAL was founded on the conviction that the German investment property market requires a different form of partnership — one that assumes responsibility across the entire investment cycle, rather than confining itself to individual stages.
  • SIINUS CAPITAL does not position itself as a broker or property manager, but as an operating partner that brings together capital and expertise — with a direct stake in the success of the investment, from initial analysis through to exit. This stance deliberately sets itself apart from a transaction-driven business model, in which the acquisition itself is treated as the objective.
  • The underlying conviction is equally clear: capital alone does not create value. Expertise alone does not generate returns. Only the combination of both — within a clearly structured, transparent engagement — gives rise to long-term value development. This conviction remains the foundation of every investment decision at SIINUS CAPITAL to this day.

The Location

  • The Rheinauhafen in Cologne serves as the operational base for nationwide investment strategies. It embodies the connection between tradition and modern architecture — a reflection of our own approach: time-tested, conservative principles of capital protection, implemented through a contemporary, structured methodology.

Network

  • SIINUS CAPITAL operates as a lean governance structure that draws on an established network of specialized service providers. Every external interface is carefully selected and continuously reviewed for performance.
  • Property sourcing through established broker and off-market relationships
  • Access to institutional sales processes and portfolio transactions
  • Legal and notarial support through experienced law firm
  • Technical due diligence through architects and independent surveyor
  • Commercial and technical property management through regional management companie
  • Construction and modernization management through specialized site managers and trade networks
  • Tax structuring through independent tax advisory firms

Let's talk about your investment objectives.

We look forward to engaging with investors who value a structured and discreet investment process.