10 Fairfax County Headquartered Companies Make the 2026 Fortune 500 Rankings

10 Companies. $370 Billion in Revenue. One Powerful Ecosystem.

Fairfax NOVA remains strong in the 2026 Fortune 500 rankings, with 10 Fairfax-headquartered companies listed among the largest publicly traded corporations in the United States.

Among the most notable additions is Amentum, which debuted at #313 with $14.4B in revenue following its public launch in late 2024. Amentum’s Fortune 500 debut highlights the continued growth and prominence of the region’s aerospace, defense, and government contracting sector. The company joins a strong roster of Fairfax NOVA-based industry leaders on the list, including Freddie Mac (#55), Capital One (#63), General Dynamics (#91), Northrop Grumman (#112), Leidos (#260), Hilton (#367), Booz Allen Hamilton (#372), NVR (#409), and CACI (#459).

Fairfax’s Fortune 500 companies combined revenue of $370B is 46% of Virginia’s total Fortune 500 companies combined revenue of $808M. The combined revenue increased by $31B from the previous year, which was $339B.

Six more Fairfax-based companies round out the Fortune 1,000 — SAIC (#513), Parsons (#568), Maximus (#628), V2X (#731), Navient (#890), and TEGNA (#998).

Overall, the rankings validate Fairfax NOVA’s position as a hub for Fortune 500 headquarters and industry-leading companies across defense, technology, finance, and hospitality, signaling a powerful ecosystem for the county’s economic base.

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