Yesterday in Case C-436/16 Leventis the Court of Justice summarily confirmed the principle of privity of choice of court under the Brussels I Recast. I have looked at this issue before e.g. when I discussed Refcomp and Profit Sim. The tos and fros between the various parties in the case meant they were acquainted with each other in the courtroom and in arbitration panels. It also meant that actions, settlements etc. between one of them and a third party necessarily impacted commercially on the other.
However the Court of Justice essentially held that such a close, voluntary or not, relationship between the two parties does not mean that a jurisdiction clause in a contract between two companies can be relied upon by the representatives of one of them to dispute the jurisdiction of a court over an action for damages which aims to render them jointly and severally liable for supposedly tortious acts carried out in the performance of their duties. The Court simply noted that the referring national court had given no indication of choice of court made between the parties as to the latter issue, employing the classic (now) Article 25 set of criteria.
Of note is that unlike other cases such as Goldman Sachs v Novo Banco, there did not seem to be any kind of theory in relevant national law which would have led to imputability (or potential to call upon) choice of court to a third party under the given circumstances.
(Handbook of) European private international law, 2nd ed. 2016, Chapter 2, Heading 18.104.22.168.