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

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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.
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Pleiade Investissement’s shareholders meet once a month to discuss their current holdings, investment opportunities, and share their managerial experience with the investment team.
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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.