OpenX
PrivateLast Round
Series E
Jan 17, 2013
Total Funding Raised
$73M
Momentum
Top 25%
of companies Caplight tracks
Company Overview
OpenX is an advertising technology company that provides a supply-side platform (SSP) and ad exchange to help publishers and brands manage and monetize digital advertising inventory.
Sector
Media, Entertainment & Gaming
Verticals
Digital Advertising, Digital Publishing, Marketing
Business Model
B2B
Customer Profile
Marketplace Commission, Usage-Based SaaS
AI Layer
Infrastructure
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
OpenX Comparables
Compare OpenX with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Index Exchange | 89% | |
| PubMatic, Inc. | 87% | |
| TripleLift | 83% | |
OpenX Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series E | Jan 17, 2013 | ||||
| Series D | May 31, 2011 | ||||
| Series C | May 26, 2009 | ||||
| Series B | Jan 16, 2008 | ||||
| Series A | Jun 13, 2007 |
OpenX Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Carta Communication | Series E |
| O'Reilly AlphaTech Ventures | Series A, Series B |
| Coastal Grove Partners | Series E |
| Mangrove Capital Partners | Series C, Series A, Series B |
| Mitsui Global Investment | Series E, Series D |
| SharesPost | Series E |
| AOL Ventures | Series D |
Market signals
Structured signals derived from secondary market and firmographic data.
- Apr 21, 2026
Joseph Worswick promoted to SVP of Global Partnerships.
- Apr 21, 2026
Erika Loberg promoted to VP of CTV and Curation.
OpenX Filings
SEC and related filings with document metadata.
| Typed | Date | Amount Offered | Amount Sold | Filling | Pages | Download |
|---|---|---|---|---|---|---|
Mock Valuation | Sign Up to view | Mock Valuation | Sign Up to view | Mock Valuation | Sign Up to view | Mock Valuation |
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Mock Valuation | Sign Up to view | Mock Valuation | Sign Up to view | Mock Valuation | Sign Up to view | Mock Valuation |
Frequently Asked Questions
Common questions about OpenX's valuation, stock price, and market status.