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Exhibit 99.01 Dexcom Reports First Quarter 2021 Financial Results SAN DIEGO , CA - ( BUSINESS WIRE - April 29 , 2021 ) - DexCom , Inc. ( Nasdaq : DXCM ) today reported its financial results as of and for the quarter ended March 31 , 2021 . First Quarter 2021 Financial Highlights : Revenue grew 25 % versus the same quarter of the prior year to $ 505.0 million • U.S. revenue growth of 30 % and international revenue growth of 10 % • GAAP operating income of $ 45.9 million or 9.1 % of revenue , an increase of 80 basis points compared to the first quarter of 2020. Non - GAAP operating income * of $ 46.4 million or 9.2 % of revenue , a decrease of 150 basis points over the same quarter of the prior year Strategic Highlights : • Completed significant expansion of U.S. field sales force , providing greater resources to drive awareness of Dexcom CGM among patients and clinicians Debuted the company's first - ever Super Bowl advertisement starring Nick Jonas as part of an ongoing initiative to drive better awareness , education and access for diabetes management technology Announced the launch of Dexcom Ventures , the company's inaugural venture capital fund Acquired assets of Dexcom distributor in the Netherlands , Belgium and Luxembourg , and commenced direct sales in these markets shortly after the close of the quarter " Dexcom is off to a great start in 2021 , including several key advancements of our strategic priorities in the first quarter , ” said Kevin Sayer , Dexcom's chairman , president and CEO . “ Based on the strength of our first quarter results and the significant market opportunity ahead of us , we are pleased to raise our 2021 revenue guidance . " 2021 Annual Guidance Based on the strong first quarter results , Dexcom is increasing its guidance for fiscal year 2021 revenue , and reiterating prior guidance for gross margin , Non - GAAP operating margin , and Adjusted EBITDA margin to the following levels : • • Revenue of approximately $ 2.26 - 2.36 billion ( 17-22 % growth ) Non - GAAP Gross Profit Margin of approximately 65 % Non - GAAP Operating Margin of approximately 13 % Adjusted EBITDA Margin of approximately 23 % First Quarter 2021 Financial Results