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22,371 companies in Simi Valley, California.
Find 22,371 companies in Simi Valley, California. From manufacturers to industrial suppliers, each listing carries the firm's address, website, size, and NAICS/SIC codes. You can also browse nearby cities such as Los Angeles, San Francisco, San Diego.
Of the 22,209 with a known headcount, 99% employ 1-50 people and 2 employ more than 1,000. 99% of those reporting revenue are under $10M, while 5 report more than $1B.
These pages show the first 120 of 22,371 companies. Narrow the list with the filters above or open one of the related lists below to see the rest.
Simi Valley, California companies by size and revenue
| Employees | Companies | Share |
|---|---|---|
| 1-50 | 21,897 | 98.6% |
| 51-200 | 278 | 1.3% |
| 201-1000 | 32 | 0.1% |
| 1001-5000 | 2 | 0.0% |
| 5001+ | 0 | 0.0% |
| Revenue | Companies | Share |
|---|---|---|
| Under $10M | 21,560 | 98.7% |
| $10M-$50M | 255 | 1.2% |
| $50M-$250M | 25 | 0.1% |
| $250M-$1B | 4 | 0.0% |
| $1B+ | 5 | 0.0% |
Share is of companies with a known value — 22,209 with headcount and 21,849 with revenue on file, as of Jul 17, 2026.
Frequently asked questions
How many companies are in Simi Valley, California?
22,371 companies in the directory are located in Simi Valley, California.
How many large companies are in Simi Valley, California?
10 of the 22,371 companies in Simi Valley, California employ more than 500 people, and 5 report over $1 billion in annual revenue. See the size and revenue breakdown above for the full distribution.
What size are most Simi Valley, California companies?
Most are small and mid-sized businesses: the size and revenue tables above show the full spread, from under $10M up to $1B+, across the 21,849 companies with revenue on file.
What information is included for each company?
Every listing includes the company name, location, website, employee size, revenue range where available, and NAICS/SIC classification, with a link to the full profile.
Where does this directory come from?
Listings are compiled and maintained by Factur, a sales and marketing firm for B2B manufacturers. Any company can request an update or removal from its profile page.