Harmonic
PrivateLast Round
Series C
Nov 25, 2025
Est. Valuation
$1.45B
Total Funding Raised
$295M
Momentum
Top 25%
of companies Caplight tracks
Company Overview
Harmonic operates in AI, Data & Cloud Infrastructure and is based in Palo Alto, California. Its latest recorded funding round was a Series C round in November 2025.
Harmonic is an artificial intelligence company that develops a mathematical reasoning engine utilizing artificial intelligence to deliver verifiably correct outputs.
Sector
AI, Data & Cloud Infrastructure
Verticals
ML Platforms, Synthetic Data
Business Model
B2B
Customer Profile
Usage-Based SaaS, Freemium, Subscription SaaS, Government Contracts
AI Layer
Foundation
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Harmonic Comparables
Compare Harmonic with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Axiom Math | 79% | |
| Logical Intelligence | 73% | |
| Principia Labs | 72% |
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Harmonic Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series C | Nov 25, 2025 | ||||
| Series B | Jul 10, 2025 | ||||
| Series A | Sep 23, 2024 |
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Key People
Founding team and executive leadership
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Harmonic Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Sequoia Capital | Series C |
| Emerson Collective | Series C |
| Index Ventures | Series C |
| Ribbit Capital | Series C |
| Kleiner Perkins | Series C |
Market signals
Structured signals derived from secondary market and firmographic data.
- Jul 28, 2026
Grew 20% QoQ, from 41 to 49 employees.
- Mar 18, 2026
Launched Aristotle Agent, an 'autonomous mathematician', with Robinhood CEO endorsement.
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Recent news
Latest coverage and updates
- receives_financingOct 29, 2026
Harmonic has received $295M in funding.
- is_developingOct 28, 2026
Harmonic is developing mathematical superintelligence, a reasoning-focused AI system aimed at reducing hallucinations and factual errors, in Oct '26.
- has_valuationOct 27, 2026
On Nov 25th '25, Harmonic announces a $120 million Series C that values the company at $1.45B.
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Harmonic 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 Harmonic's valuation, stock price, and market status.
Is Harmonic a public or private company?
Harmonic is a private company.
What is the current stock price of Harmonic?
Harmonic is a private company, so its shares have no public market price. Caplight tracks Harmonic's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Harmonic worth (valuation)?
Harmonic's valuation is estimated at $1.4B based on funding round data.
Can I buy Harmonic stock?
Harmonic shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Harmonic's last funding round?
Harmonic's most recent funding round was Series C on November 25, 2025.
Who are the main investors in Harmonic?
Key investors in Harmonic include Ribbit Capital.
Will Harmonic IPO soon?
No public IPO plans have been announced for Harmonic.
How can I track Harmonic secondary market activity?
Caplight tracks bids, offers, and trades in Harmonic's shares on secondary markets.