The Washington Business Journal recently released its 2025 list of the 50 largest bioscience employers in the Washington metropolitan area. Seven companies located in the City of Rockville and 12 businesses in the Biotech Corridor were included in the rankings, based on their reported number of metro-area employees.

Rockville, the epicenter of the Biotech Corridor, is home to a concentration of bioscience companies and research institutions extending through Montgomery County. The Corridor’s biotech and life sciences companies feature specializations including clinical research, diagnostics, biopharmaceuticals, and biologics manufacturing. The City of Rockville serves as a hub within this corridor due to its proximity to federal health agencies, academic institutions, and established industry infrastructure.

The following companies within the City of Rockville are ranked among the region’s largest bioscience employers:

• #2 Emmes – 401 N. Washington Street, #700 Rockville, MD 20850
• #7 Meso Scale Diagnostics – 1601 Research Boulevard, Rockville, MD 20850
• #14 Otsuka U.S. – 2440 Research Boulevard, Rockville, MD 20850
• #20 Amgen Inc. – Research West II, 2400 Research Boulevlard
• #24 I-MAB Biopharma Inc. – 2400 Research Boulevard, #400 Rockville, MD 20850
• #26 Maxim Biomedical – 1500 East Gude, Suite A , Rockville MD 20850
• No Rank – Aurinia Pharmaceuticals – 77 Upper Rock Circle, #700, Rockville, MD 20850

Companies within the Biotech Corridor include:

• #3 Supernus Pharmaceuticals – 9715 Key West Avenue, Rockville, MD 20850
• #8 GlaxoSmithKline (GSK) – 14200 Shady Grove Roas, Rockville, MD 20850
• #13 Lonza – 9900 Medical Center Drive, Rockville, MD 20850
• #18 MaxCyte Inc.  – 9713 Key Avenue, #400 Rockville, MD 20850
• #28 Theriva Biologics – 9605 Medical Center Drive, #270, Rockville, MD 20850
• #30 AgNovos Bioscience – 7301 Calhoun Place, #100, Rockville, MD 20855
• #32 KeyGene Inc.  – 9600 Gudelsky Drive, Rockville, MD 20850
• #33 Sequella Inc. – 9610 Medical Center Drive, #200, Rockville, MD 20850
• No Rank –  MilliporeSigma’s BioReliance – 14920 Broschart Road, Rockville, MD 20850
• No Rank – Advanced Bioscience Laboratories (ABL Inc.) – 9800 Medical Center Drive, Building D, Rockville, MD 20850
• No Rank – MacroGenics – 9704 Medical Center Drive, Rockville, MD 20850
• No Rank – CASI Pharmaceuticals Inc. – 9620 Medical Center Drive, #300, Rockville, MD 20850

View the list of Washington Business Journal’s 2025 ranking of bioscience employers in the region at bizjournals.com/washington/subscriber-only/2025/08/08/here-are-the-50-largest-bioscience-employers-in-greater.html