Pleiade Investissement is the investment holding company in which Louis de Montalembert spent most of his career before founding Pléiade AM.

Pleiade Investissement is an investment holding company created by entrepreneurs who have all founded and/or developed their own business. Their objective is to invest part of their assets together in entrepreneurial endeavours driven by quality management teams.
Pleiade Investissement’s shareholders meet once a month to discuss their current holdings, investment opportunities, and share their managerial experience with the investment team.
Pleiade Investissement selects its investments sparingly, because it knows that a good shareholder working alongside a good management team can make a difference in the history of a business, in the knowledge that one should dedicate as much time to today’s investments as one does to tomorrow’s.