Every new California business filing, every dayNew Businesses Filed in Ontario, CA
766 newly registered businesses tracked in Ontario, California. Browse by category or see the latest filings below.
Updated November 12, 2026 · Most recent business filing Oct 29, 2026
Every new California filing, every day
See how it worksAbout New Ontario Businesses
Ontario, CA has 766 newly registered businesses in our database. 57 of those landed in the past 30 days. We refresh this page daily as new Ontario companies appear in the California Division of Corporations records.
The most active industries in Ontario are Holding Company (18), Trucking (17), and Consulting (11). Use the category list below to narrow the results to a single industry, or scroll down for the most recent records of any type.
Every entry shows the business name, filing date, and category, plus verified owner and contact information where we have it. The latest Ontario business filing was recorded on Oct 29, 2026. You can jump back to the full California view any time to compare Ontario against other markets.
Ontario New Business Data
In October 2026, DayOneLead tracked 82 new business filings in Ontario, down 25% from September 2026 and about flat against the prior six-month average of 84.
That is 0.6% of the 14,651 business filings tracked statewide in California that month.
The U.S. Census Bureau counted 57,316 new business applications in California in September 2026, 19,263 of them high-propensity (likely to become employers).
New business filings tracked per month
| Month | business filings |
|---|---|
| June 2026 | 48 |
| July 2026 | 85 |
| August 2026 | 91 |
| September 2026 | 110 |
| October 2026 | 82 |
| November 2026 (month to date) | 12 |
Counts of business filings DayOneLead collected from the California Division of Corporations, starting June 2026 when our feed became complete. The lighter bar is the current month to date.
Census business applications in California
| Month | Census applications | High-propensity | Statewide tracked |
|---|---|---|---|
| Sep 2026 | 57,316 | 19,263 | 20,535 |
| Aug 2026 | 50,293 | 15,564 | 17,078 |
| Jul 2026 | 64,998 | 20,267 | 13,693 |
| Jun 2026 | 50,775 | 18,563 | 14,482 |
| May 2026 | 51,444 | 17,914 | n/a |
| Apr 2026 | 62,033 | 22,059 | n/a |
Census Business Formation Statistics count applications for an employer identification number, not seasonally adjusted. They run ahead of state registrations and include sole proprietors that never file with the state, so the two series measure different steps of starting a business.
Websites and domain age
Based on 224 business filings from Jun 2026 to Aug 2026, with domain registration dates from public WHOIS/RDAP records for 58 of them. The latest two months are left out because websites are often found weeks after a filing. A domain much older than the filing usually means an existing operation formalizing, not a brand-new idea.
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Frequently Asked Questions
How many new businesses are registered in Ontario, CA?
DayOneLead tracks 766 newly registered businesses in Ontario, with about 57 added in the last 30 days.
How fresh is the Ontario business data?
We refresh this page every day from the California Division of Corporations. The latest Ontario business filing we recorded was on Oct 29, 2026.
What are the most common new businesses in Ontario?
The most active industries among new Ontario registrations are Holding Company, Trucking, and Consulting. You can filter by any category to narrow the list.
What information is included for each Ontario business?
Each entry shows the business name, filing date, and category, plus a verified owner name, phone, email, and website wherever we can confirm them.
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