01 /

Who is a SIF for?

SIFs are reserved for institutional, professional and other qualifying well-informed investors. The regime can accommodate various asset classes and investment strategies within its applicable framework. A SIF is not a standard mass-market retail fund.

02 /

Authorisation and ongoing supervision

A SIF requires prior CSSF authorisation and remains subject to supervisory requirements and reporting. The approval process involves constitutional and offering documentation as well as relevant service-provider arrangements.

03 /

Essential counterparties

  • An AIFM where required by the fund’s classification and the applicable AIFM rules.
  • Luxembourg central administration and an eligible depositary.
  • An authorised independent auditor for the annual report.
  • Legal and tax support tailored to the investment strategy.
04 /

SIF versus RAIF

Both regimes target well-informed investors and can support alternative strategies. The important structural difference is direct CSSF product authorisation for a SIF versus the RAIF’s reliance on an authorised external AIFM without direct CSSF product authorisation. Other obligations and practical costs should be evaluated case by case.

Primary sources & further readingSources checked · 2026-10-19
  1. ALFI — Specialised Investment Funds
  2. CSSF — Authorisation of a UCI