Ampaire
PrivateLast Round
Series B
Aug 18, 2026
Total Funding Raised
$34.61M
Momentum
Top 5%
of companies Caplight tracks
Company Overview
Ampaire operates in Frontier & Industrial Tech and is based in Long Beach, California. Its latest recorded funding round was a Series B round in August 2026.
Ampaire is an aerospace company that develops hybrid-electric propulsion systems and retrofits existing aircraft to improve fuel efficiency and reduce environmental impact.
Sector
Frontier & Industrial Tech
Verticals
Aviation & Drones, Clean Transportation, Energy Storage
Business Model
B2B
Customer Profile
Hardware Sales, Government Contracts
AI Layer
Non-AI
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Ampaire Comparables
Compare Ampaire with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Dovetail Electric Aviation | 83% | |
| Heart Aerospace | 83% | |
| Ascendance Flight Technologies | 81% |
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Ampaire Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series B | Aug 18, 2026 | ||||
| Strategic | Jan 8, 2026 | ||||
| Grant | Feb 17, 2023 | ||||
| Grant | Feb 24, 2020 | ||||
| Series A | Apr 10, 2019 | ||||
Angel | Feb 28, 2019 |
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Key People
Founding team and executive leadership
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Ampaire Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Elemental Impact | Accelerator, Angel, Series B |
| Techstars | Accelerator, Series B |
| Gaingels | Series B |
| Climate Capital | Series B |
| Venn10 Capital | Series B |
| The Pay It Forward Company | Series B |
| Techstars Ventures | Series B |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Sep 11, 2026
Monthly visitors increased 36% MoM, reaching 3.7K.
- Aug 18, 2026
$19M round led by DiamondStream Partners.
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Recent news
Latest coverage and updates
- is_developingOct 27, 2026
Based in California, Ampaire is developing hybrid-electric aircraft that retrofit existing passenger aircraft with hybrid propulsion to reduce fuel consumption, emissions, and operating costs.
- partners_withAug 19, 2026
Ampaire and International Airlines Group are to work together to develop new APU retrofit technology that combines conventional engine power with electricity.
- receives_financingAug 19, 2026
Ampaire receives $19M in Series B financing from IAGi Ventures, Alaska Airlines, DiamondStream Partners and other investors to accelerate the commercialisation, supply chain and manufacturing of its sustainable aircraft propulsion systems.
- is_developingAug 19, 2026
On Aug 19th '26, Ampaire is developing hybrid-electric engines with airline, cargo and government partners to prepare them for commercial entry into service across propulsion and auxiliary power applications.
- is_developingAug 18, 2026
Ampaire develops hybrid-electric retrofit technologies that integrate electric propulsion systems with conventional engines to lower fuel burn, reduce emissions, and cut airline operating costs.
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Ampaire 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 Ampaire's valuation, stock price, and market status.
Is Ampaire a public or private company?
Ampaire is a private company.
What is the current stock price of Ampaire?
Ampaire is a private company, so its shares have no public market price. Caplight tracks Ampaire's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Ampaire worth (valuation)?
Valuation information for Ampaire is not publicly available.
Can I buy Ampaire stock?
Ampaire shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Ampaire's last funding round?
Ampaire's most recent funding round was Series B on August 18, 2026.
Who are the main investors in Ampaire?
Key investors in Ampaire include DiamondStream Partners.
Will Ampaire IPO soon?
No public IPO plans have been announced for Ampaire.
How can I track Ampaire secondary market activity?
Caplight tracks bids, offers, and trades in Ampaire's shares on secondary markets.