EDF, Caisse des Dépôts and CNP Assurances sign a binding agreement for a long-term partnership... On 14 December 2016, EDF, on one hand, and Caisse des Dépôts and CNP Assurances, on other hand, entered into a binding agreement setting the terms and conditions of the acquisition by Caisse des Dépôts and CNP Assurances of a 49 9 % indirect stake in RTE (1), as well as the modalities of a long-term partnership to foster the development of RTE.