# John Henderson

> John Henderson is a Series A investor at Airtree Ventures backing Software. See 34 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Airtree Ventures](https://shizune.co/investors/profile/airtree-ventures-2)
- Location: Sydney, Australia
- Total investments: 34
- Last investment: Jun 2026
- Lead investor: 35%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/in/johnhenderson
- X (Twitter): http://twitter.com/JohnHenderson
- Website: http://medium.com/@johnehenderson

John Henderson is a Series A investor at Airtree Ventures in Sydney focused on Software and SaaS. John is a Partner at Airtree Ventures. He works with the best Australian and Kiwi founders to create world class technology businesses. John was previously a Principal at White Star Capital in London and New York and also co-founded London.ai, Europe’s leading event for the AI community which is held quarterly in London. Prior to his currentroles, John was the COO of Summly (acquired by Yahoo in May 2013) and has also held roles at Facebook, The Boston Consulting Group and as a lawyer at Linklaters. John also co-founded Bush Campus whose failure perhaps taught him more than the rest of his experiences combined.

## Contacts

5 contacts available for John Henderson: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/john-henderson-2?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $120k–$11M |
| Series A | $2.8M–$17M |
| Series B | $5.4M–$110M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 8 | 24% |
| SaaS | 4 | 12% |
| Internet | 4 | 12% |
| Analytics | 4 | 12% |
| Blockchain | 3 | 9% |

52 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series A | 11 | 32% |
| Seed | 9 | 26% |
| Series B | 3 | 9% |
| Funding Round | 2 | 6% |
| Pre-Seed | 1 | 3% |

9 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| Australia | 11 | 32% |
| New Zealand | 2 | 6% |
| United States | 2 | 6% |
| Israel | 1 | 3% |
| Finland | 1 | 3% |

6 countries tracked in total.

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Everlab | Everlab is an Australian health-tech company building the infrastructure for preventative health | $46M | Series A | Jun 16, 2026 | https://www.everlab.com.au |
| Firmable | Firmable is Australia's authoritative B2B database, enabling businesses to make smarter decisions and outperform by knowing more about their leads, customers, and candidates than ever before. Their platform gives access to the world's largest database of companies in one place, with a rich set of attributes ranging from basicfirmographics like location, industry, and employees to next-generation data points like company tech stacks, web traffic, and reviews, as well as deep local information like ABN mapping. | $14M | Series A | Mar 02, 2026 | https://firmable.com |
| RockSolid Network | RockSolid Network is a DeFi protocol offering institutional-grade liquid vaults and white-label vault solutions. | $2.8M | Pre-Seed | Sep 09, 2025 | https://x.com/rocket_pool |
| Askable | Askable offers a comprehensive research platform that facilitates access to certified researchers and verified participants globally. The platform streamlines the research process from recruitment to analysis, enabling teams to gather insights efficiently. | $14M | Series A | Dec 11, 2024 | https://www.askable.com |
| Sablier | Sablier provides a token distribution protocol used by DAOs and businesses for vesting, payroll, airdrops, and more. The linear stream is our flagship payment model, which distributes assets on a continuous, by-the-second basis.The way it works is that the sender of a payment stream first deposits a specific amount of ERC-20 tokens in a contract.Then, the contract progressively allocates the funds to the recipient, who can access them as they become available over time. The payment rate is influenced by various factors, including the start and end times, as well as the total amount of tokens deposited. | $4.5M | Seed | Mar 22, 2024 | https://sablier.com/ |
| Firmable | Firmable is Australia's authoritative B2B database, enabling businesses to make smarter decisions and outperform by knowing more about their leads, customers, and candidates than ever before. Their platform gives access to the world's largest database of companies in one place, with a rich set of attributes ranging from basicfirmographics like location, industry, and employees to next-generation data points like company tech stacks, web traffic, and reviews, as well as deep local information like ABN mapping. |  |  | Oct 30, 2023 | https://firmable.com |
| Firmable | Firmable is Australia's authoritative B2B database, enabling businesses to make smarter decisions and outperform by knowing more about their leads, customers, and candidates than ever before. Their platform gives access to the world's largest database of companies in one place, with a rich set of attributes ranging from basicfirmographics like location, industry, and employees to next-generation data points like company tech stacks, web traffic, and reviews, as well as deep local information like ABN mapping. | $9M | Seed | Oct 30, 2023 | https://firmable.com |
| Employment Hero | Employment Hero operates as an online human resource platform for small and medium-sized businesses. Its cloud-based HR platform combines HR software, financial services, scheduling, and payroll tools, as well as employee benefits, providing growing companies with an intuitive, affordable way to manage essential employee information and HRprocesses. The company aims to become the employment platform of choice for employers and employees in Australia and beyond, by providing free, easy-to-use HR software that employers love to use, and access to far greater benefits for all employees.Employment Hero was founded in 2014 and is headquartered in Sydney New South Wales. | $166.6M | Series F | Oct 18, 2023 | http://www.employmenthero.com/ |
| FrankieOne | FrankieOne is a compliance orchestration platform that connects 350+ identity verification and fraud detection data sources into a single API for KYC, KYB, AML, and fraud prevention. | $15.3M | Series A | Nov 28, 2022 | https://www.frankieone.com |
| EQL | EQL is on a mission to build the world's fairest Hype Commerce platform. | $25M |  | Apr 11, 2022 | https://eql.xyz |

10 of 34 investments shown.

## Co-investors
- [Insight Partners](https://shizune.co/investors/profile/insight-partners) — VC Fund, 7 deals together
- [OneVentures](https://shizune.co/investors/profile/one-ventures) — VC Fund, 7 deals together
- [SEEK](https://shizune.co/investors/profile/seek-ltd) — VC Fund, 5 deals together
- [Index Ventures](https://shizune.co/investors/profile/index-ventures) — VC Fund, 4 deals together
- [Seek Investments](https://shizune.co/investors/profile/seek-investments) — VC Fund, 4 deals together
- [Skip Capital](https://shizune.co/investors/profile/skip-capital) — VC Fund, 4 deals together

## About Airtree Ventures

VC Fund · Paddington, Australia

Airtree is a venture capital firm backing Aussie and Kiwi founders, building the iconic technology companies of tomorrow. We’re powered by our network, dedicating extraordinary resources to help founders shortcut company-building firsts and accelerate their journey from idea to global household name.As one of the largest and most activeearly-stage investors in Australia and New Zealand, Airtree’s 100+ portfolio features the region’s breakout tech companies, including Canva, Go1, Employment Hero, Pet Circle, Immutable and Linktree.

5 contacts available at Airtree Ventures.

| Name | Title | Profile |
| --- | --- | --- |
| James Cameron | Partner | https://shizune.co/investors/profile/james-cameron-3 |
| James Dale | Explorer | https://shizune.co/investors/profile/james-dale-c5f0 |
| Alex Brogan | Venture Scout | https://shizune.co/investors/profile/alex-brogan-ff04 |
| Craig Blair | Founder, Managing Partner | https://shizune.co/investors/profile/craig-blair |
| Daniel Petre | Founder, Partner | https://shizune.co/investors/profile/daniel-petre |

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## FAQ

### What does John Henderson invest in?

John Henderson invests primarily in Software, SaaS and Internet startups, most often at Series A and Seed stage. Most of the 34 investments tracked by Shizune back companies in Australia. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is John Henderson's check size?

John Henderson typically joins rounds of $120k–$11M at Seed, $2.8M–$17M at Series A and $5.4M–$110M at Series B. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds John Henderson participates in.

### How do I contact John Henderson?

Public channels for John Henderson include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### When did John Henderson last invest?

The most recent investment recorded for John Henderson closed in Jun 2026. Shizune tracks 34 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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