a number of investors working together, often to take control of a company or part of a company:
• An investor group with a 9.89% stake in the company said it is seeking seats on its board.
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investor group UK US noun [C] FINANCE
► a number of investors working together, often to buy a business or start a new business: »
The investor group had been hoping to build a new casino.
Financial and business terms. 2012.