327 newly registered businesses tracked in Ontario, California. Browse by category or see the latest filings below.
Ontario, CA has 327 newly registered businesses in our database. 6 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 (11), Trucking (10), and Consulting (9). Use the category list below to narrow the results to a single industry, or scroll down for the most recent filings 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 filing was on May 7, 2026. You can jump back to the full California view any time to compare Ontario against other markets.
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