GRAND RAPIDS — Charter Growth Capital Fund has acquired a minority stake in Grand Rapids-based public relations and investor relations firm Lambert & Co.

The debt and equity investment will support Lambert & Co.’s growth at its locations in Michigan, Arizona, Texas and New York, as well as help accelerate the firm’s M&A strategy and the launch of new practice areas.

Lambert retained a majority stake in the firm. Terms of the investment were otherwise undisclosed.

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