Alternative financing, understood as non-bank financing, significantly thrived after the great global financial crisis from 2007 as a response to the banking credit crunch and as a means to fix the excessive bank dependance companies faced. In this context, private debt - which until then was just an extension of private equity transactions - progressively earned its own identity as a new private and alternative asset class together with private equity. However, the so-called "Private Debt Funds" have been lacking their own regulatory framework in Spain until the enactment of Act 18/2022 on company foundation and development, which has amended Act 22/2014 on private equity entities. Such Act 18/2022 has, inter alia, created the concept of Closed-ended Loan Collective Investment Entities (CLCIE), which is not incompatible with other legal concepts that have so far offered a legal coverage to Private Debt Funds. This article dives into Private Debt Funds and briefly assesses the diverse legal concepts under which non-bank financing has been traditionally made available to corporates. In particular, it focuses on the analysis of the new CLCIE and their regulatory framework in Spain. [ABSTRACT FROM AUTHOR]