Top Series A companies in the United States
Companies that have closed a Series A — product-market fit confirmed and scaling. Filtered to companies headquartered in the United States.
- StageSeries A
- HQthe United States
- Matches6,510
Built from a search like: “Top Series A companies in the United States”
Ranked by current headcount across Series A companies headquartered in the United States. Refreshed daily.
- 1Foundever· Miami, Florida, United States
- Series A
- 103.6k employees
- Founded 2019
- 2Taco Bell· Irvine, California, United States
- Series A
- 84.9k employees
- Founded 1962
- 3Stealth Startup· San Francisco, California, United States
- Series A
- 32.4k employees
- Founded 2020
- 4HARMAN International· Stamford, Connecticut, United States
- Series A
- 28.8k employees
- Founded 1980
- 5VXI Global Solutions· Los Angeles, California, United States
- Series A
- 22.2k employees
- Founded 2015
- 6Indeed· Austin, Texas, United States
- Series A
- 19.5k employees
- Founded 2004
- 7Genentech· South San Francisco, California, United States
- Series A
- 18.1k employees
- Founded 1976
- 8Panda Restaurant Group· Rosemead, California, United States
- Series A
- 18.1k employees
- Founded 1973
- 9Massage Envy· Scottsdale, Arizona, United States
- Series A
- 16.7k employees
- Founded 2002
- 10UW Health· Madison, Wisconsin, United States
- Series A
- 10k employees
- Founded 1918
- 11Sony Pictures Entertainment· Culver City, California, United States
- Series A
- 8.3k employees
- Founded 1987
- 12Cook Medical· Bloomington, Indiana, United States
- Series A
- 8.1k employees
- Founded 1963
- 13iSoftStone· Plano, Texas, United States
- Series A
- 7.3k employees
- Founded 2005
- 14Isagenix· Gilbert, Arizona, United States
- Series A
- 7.2k employees
- Founded 2002
- 15Temu· Boston, Massachusetts, United States
- Series A
- 6.3k employees
- Founded 2022
- 16Starcom· Chicago, Illinois, United States
- Series A
- 5.7k employees
- Founded 2020
- 17Horizon Blue Cross Blue Shield of New Jersey· Newark, New Jersey, United States
- Series A
- 5.2k employees
- Founded 1932
- 18Gusto· San Francisco, California, United States
- Series A
- 4.4k employees
- Founded 2011
- 19micro1· San Francisco Bay Area
- Series A
- 4.1k employees
- Founded 2022
- 20Quantiphi· Marlborough, Massachusetts, United States
- Series A
- 4k employees
- Founded 2013
- 21HealthPlanOne· Shelton, Connecticut, United States
- Series A
- 3.9k employees
- Founded 2006
- 22SHOP.COM· Greensboro, North Carolina, United States
- Series A
- 3.7k employees
- Founded 2004
- 23University of Massachusetts· Boston, Massachusetts, United States
- Series A
- 3.5k employees
- Founded 2020
- 24Lightera· Norcross, Georgia, United States
- Series A
- 3.4k employees
- Founded 2025
- 25Centific· Redmond, Washington, United States
- Series A
- 3.2k employees
- Founded 2020
Find engineers at Series A companies in the United States
Series A companies in the United States are some of the fastest-moving employers in the market. The list above ranks the largest Series A-stage companies headquartered in the United States by current headcount, drawn from public LinkedIn and Crunchbase records. With 6,510 matching companies in our index, the density of senior engineers, designers, and founders is unusually high.
At Series A, teams tend to be small, ambitious, and on the hunt for senior talent. The companies on this list are good signals for where the the United Statestalent market is heating up — and for which engineers and founders are about to become tomorrow’s operators.
Refolk converts this list into a live search. Ask for “founders of Series A companies in the United States” or “senior engineers at Series A companies in the United States hiring” and Refolk returns a ranked shortlist with evidence behind each match.
How this list is built
Last refreshed: Thu, 07 May 2026 08:22:08 GMT
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