Largest Federal Contractors in California 2026
California has 322 federal contractors that received $56.7B across 3,910 contract awards. The largest contractor is Optum Public Sector Solutions, Inc. at $647.1M.
Top 10 Contractors in California
| # | Contractor | Federal Obligations |
|---|---|---|
| 1 | Optum Public Sector Solutions, Inc. | $647.1M |
| 2 | Lockheed Martin Corporation | $540.6M |
| 3 | Mckesson Corporation | $289.3M |
| 4 | The Boeing Company | $276.3M |
| 5 | Electric Boat Corporation | $275.8M |
| 6 | Triwest Healthcare Alliance Corp. | $269.3M |
| 7 | Humana Government Business Inc. | $258.0M |
| 8 | Raytheon Company | $249.1M |
| 9 | Huntington Ingalls Incorporated | $239.4M |
| 10 | Booz Allen Hamilton Inc. | $222.5M |
Top Federal Agencies Spending in California
| Agency | Spending |
|---|---|
| Department of Defense | $31.2B |
| Department of Health and Human Services | $8.5B |
| Department of Veterans Affairs | $4.5B |
| Department of Energy | $3.4B |
| General Services Administration | $2.3B |
Federal contract data for California is sourced from USASpending.gov, the official open data source for U.S. federal government spending.
Frequently Asked Questions
Optum Public Sector Solutions, Inc. is the largest federal contractor in California with $647.1M in federal obligations.
California received $56.7B in federal contracts across 3,910 awards to 322 contractors.
All federal spending data is sourced from USASpending.gov, the official source for U.S. government spending data. This includes contracts, grants, loans, and other financial assistance.
Contractors ranked by total federal obligation amount. Data includes contracts, grants, loans, and direct payments.
The this entity category groups every U.S. federal government spending entity sharing this attribute. The list above is the data; the paragraphs below explain what the grouping means against the broader USASpending.gov federal awards data distribution and how to read the relative rankings within the category.
For readers using this category as a starting point, the per-entity detail pages linked from the table above carry the underlying USASpending.gov federal awards data data in full. The category-level view is the filter; the per-entity pages are the actual answer.
Source: USAspending.gov, 2026.