Joined Cases T-426/10 to T-429/10, T-438/12 to T-441/12: Judgment of the General Court of 2 June 2016 — Moreda-Riviere Trefilerías and Others v Commission (Competition — Agreements, decisions and concerted practices — European market for prestressing steel — Price fixing, market sharing and the exchange of commercially sensitive information — Decision finding an infringement of Article 101 TFEU — Economic unit — Direct participation in the infringement — Secondary liability of parent companies — Succession of undertakings — Complex infringement — Single and continuous infringement — 2006 Guidelines on the method of setting fines — Principle of non-retroactivity and principle that penalties must be lawful — Mitigating circumstances — Ability to pay — Rights of the defence — Obligation to state reasons — Request for reconsideration — No change in the factual circumstances — Letter of rejection — Inadmissibility)