Investors / United States / DiamondStream Partners
DiamondStream Partners
Venture capital · Seattle, WA, United States · North America
DiamondStream Partners is an investment firm focused on aerial mobility and related transportation businesses. It targets middle-stage aerospace, aviation, hardware and software companies whose technologies can lower costs and grow markets.
Invests inAI & Machine Learning
In its own wordsadvanced air mobilityaerospaceaviationelectric propulsionpredictive maintenancesoftware
Your fit with DiamondStream Partners
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsDiamondStream Partners lists 9 checked portfolio companies on its own site and is named in 1 funding round, 1 of them as lead. Its most frequent entry is Series B, 100% of the companies with a known first round. Its largest theme is AI & Machine Learning (100%). 86% of its companies are based in United States. It invests most often alongside Hemisphere Ventures, Syndicate 708 and 122 West Ventures.
Counts come from funding rounds that name DiamondStream Partners, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Entry stage
share of companies by the stage of its first roundDiamondStream Partners does not state its stages on its site, so only what it does is shown.
Show as a table
| Value | |
|---|---|
| Pre-seed | 0% |
| Seed | 0% |
| Series A | 0% |
| Series B | 100% |
| Growth | 0% |
Activity by year
rounds it joined, last 10 yearsShow as a table
| Total | Rounds it led | |
|---|---|---|
| '17 | 0 | 0 |
| '18 | 0 | 0 |
| '19 | 0 | 0 |
| '20 | 0 | 0 |
| '21 | 0 | 0 |
| '22 | 0 | 0 |
| '23 | 0 | 0 |
| '24 | 0 | 0 |
| '25 | 0 | 0 |
| '26 | 1 | 1 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 19th | 9 companies |
| Recent activity | 59th | 1 rounds in 12 months |
| Early stage | 54th | 0% of entries at pre-seed or seed |
| Evidence | 80th | 11% of companies confirmed by a round |
| Sector focus | 100th | 100% in its largest sector |
| Reach | 42th | 2 countries |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Hemisphere Ventures | 2 |
| Syndicate 708 | 2 |
| 122 West Ventures | 1 |
| 1955 Capital | 1 |
| ATDC | 1 |
| Advection Growth Capital | 1 |
| Aster | 1 |
| Astir Ventures | 1 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers9100%
- No longer answers00%
- Points to another company00%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 100% | 18% |
Co-investor network
who it backs companies with, and who they back togetherAll co-investors or Compare portfolios with Hemisphere Ventures
Compare DiamondStream Partners head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Recent portfolio activity
when companies last raised with DiamondStream Partners| Date | Company | Stage |
|---|---|---|
| 18 Aug 2026 | Series B Led |
Round details for DiamondStream Partners
Amounts, full round histories and every co-investor in DiamondStream Partners' rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
9 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| AlarisPro provides a cloud-based UAS fleet management platform for tracking flights, maintenance, parts, and aircraft configuration | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Ampaire develops and flies hybrid-electric aircraft | AI & Machine LearningAI & Machine Learning | Aug 2026Series B | Page + round | |
| Elroy Air is working to enable same-day shipping to every person on the planet. | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| GPMS International develops and provides a health and usage monitoring system for helicopters | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| JetZero develops and manufactures all-wing airplanes with improved fuel efficiency | AI & Machine Learning | Portfolio page | ||
| SwissDrones is a leading manufacturer and operator of long-range unmanned helicopter systems designed to replace manned helicopters for safe and cost-effective aerial intelligence gathering in surveillance, linear inspection and search & rescue missions beyond visual line of sight. | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| VerdeGo Aero is focused on developing and manufacturing cutting-edge hybrid-electric powerplant solutions for aircraft. | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Volantio provides an AI platform for airlines to identify and act on demand reallocation opportunities | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Wingtra provides aerial survey data and solutions using drones and related software and services. | AI & Machine LearningAI & Machine Learning | Portfolio page |
About this data
site last read 5 Nov 2026- Site
- diamondstream.com
- Last read
- 5 Nov 2026
- Watching since
- 6 Nov 2026
- Rounds since
- 18 Aug 2026
- Companies checked
- 9
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
Get DiamondStream Partners' profile as data
Pull DiamondStream Partners' portfolio, co-investors and changes through one API key or MCP, open every portfolio row, compare it with other firms, and get an email when it adds a company or files a fund.
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- Full listsEvery portfolio row and two-firm overlap
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- AlertsFollow 5 investors for portfolio and fund changes
$ curl -H "X-API-Key: YOUR_KEY" \
https://api.vcinfo.io/v1/firms/diamondstream.com
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GET /v1/firms/diamondstream.com/portfolio
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