SAN DIEGO--(BUSINESS WIRE)--Johnson Fistel, PLLP, a leading stockholder rights law firm, has initiated an investigation into the board members and executive officers of DexCom, Inc. (NASDAQ: DXCM) for potential breaches of fiduciary duties and violations of the federal securities laws. What is Johnson Fistel Investigating? Between April 28, 2023 and June 5, 2024, certain DexCom insiders caused the company to issue false and misleading public statements regarding its expansion strategy and purpo