French media conglomerate Vivendi on Monday reported a surge in revenue for the first quarter, supported by by the consolidation of Lagardere as well as revenue growth at Canal+ Group and Havas. The Group said: “The organic growth of 5.4% compared to the first quarter of 2023 was notably driven by the significant contribution of Lagardere, validating the relevance of the transaction with this group last November and our confidence in the potential of its activities. Canal+ Group and Havas also delivered solid performances.” Vivendi completed its takeover of publishing house Lagardere last Nove…