pubX
PrivateLast Round
Series A
Oct 6, 2026
Est. Valuation
$5.8M
Total Funding Raised
$6.05M
Momentum
Top 5%
of companies Caplight tracks
Company Overview
pubX operates in AI, Data & Cloud Infrastructure and is based in London. Its latest recorded funding round was a Series A round in October 2026.
pubX is an advertising technology company that provides agent-to-agent infrastructure for publishers, advertisers, and agencies to plan, buy, sell, and optimize programmatic advertising.
Sector
AI, Data & Cloud Infrastructure
Verticals
Digital Advertising, Digital Publishing, Data Governance, Compliance & Risk
Business Model
B2B
Customer Profile
Usage-Based SaaS, Subscription SaaS
AI Layer
Application
Historical Pricing
Historical view of private secondary pricing and transaction trends.
pubX Comparables
Compare pubX with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Apostra | 80% | |
| Olyzon | 71% | |
| Optable | 70% |
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pubX Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series A | Oct 6, 2026 | ||||
| Seed | Feb 19, 2024 | ||||
| Seed | Mar 29, 2022 | ||||
| Pre Seed | Feb 23, 2021 |
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Key People
Founding team and executive leadership
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pubX Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Force Over Mass | Pre Seed |
| Chicago Ventures | Series A |
| Haatch | Pre Seed |
| Concept Ventures | Pre Seed |
Market signals
Structured signals derived from secondary market and firmographic data.
- Oct 6, 2026
$5M round led by Chicago Ventures
- Aug 19, 2026
Grew 29% QoQ, from 31 to 40 employees.
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Recent news
Latest coverage and updates
- hiresOct 15, 2026
Pubx is hiring Jamie Barnard, Chief Executive Officer of Compliant, as President, Global Demand Growth, where Jamie leads growth strategy across agencies, advertisers, and the wider buy side.
- acquiresOct 15, 2026
Pubx acquires Compliant on Oct 15th '26; transaction terms are undisclosed, and Compliant keeps its name and operates as a Pubx company.
- attends_eventOct 8, 2026
Pubx demonstrates what it describes as its first end-to-end agentic media buy at Advertising Week in New York, with Reckitt Benckiser as the guinea-pig client.
- receives_financingOct 6, 2026
Pubx receives a $5M Series A led by Chicago Ventures on Oct 7th '26, with the capital supporting US expansion, demand-side growth and agent-to-agent advertising infrastructure; it also acquires Compliant.
- hiresSep 20, 2026
Pubx appoints Andrew Gilbert as Country Manager, ANZ, as it launches in Australia on Sep 21st '26, giving him responsibility for operations and partnerships across Australia and New Zealand.
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pubX Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
Filing documents are not displayed on this public page. Request access to learn about available coverage.
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Frequently Asked Questions
Common questions about pubX's valuation, stock price, and market status.
Is pubX a public or private company?
pubX is a private company.
What is the current stock price of pubX?
pubX is a private company, so its shares have no public market price. Caplight tracks pubX's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is pubX worth (valuation)?
pubX's valuation is estimated at $5.8M based on funding round data.
Can I buy pubX stock?
pubX shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was pubX's last funding round?
pubX's most recent funding round was Series A on October 6, 2026.
Who are the main investors in pubX?
Key investors in pubX include Chicago Ventures.
Will pubX IPO soon?
No public IPO plans have been announced for pubX.
How can I track pubX secondary market activity?
Caplight tracks bids, offers, and trades in pubX's shares on secondary markets.