Opinion of Advocate General Pitruzzella delivered on 9 December 2021.#Federatie Nederlandse Vakbeweging v Heiploeg Seafood International BV and Heitrans International BV.#Request for a preliminary ruling from the Hoge Raad der Nederlanden.#Reference for a preliminary ruling – Directive 2001/23/EC – Articles 3 to 5 – Transfers of undertakings – Safeguarding of employees’ rights – Exceptions – Insolvency proceedings – ‘Pre-pack’ – Survival of an undertaking – Transfer of (part of) an undertaking following a declaration of insolvency preceded by a pre-pack.#Case C-237/20.