# Aerion Partners

> Aerion Partners is a VC fund in London backing SaaS, Health Care and FinTech. See 48 investments, check sizes, portfolio. Updated Aug 2026.

- Type: VC Fund
- Location: London, United Kingdom
- Total investments: 48
- Last investment: Mar 2025
- Lead investor: 2%
- Last updated: Aug 2026
- Website: https://www.aerionpartners.com/

Aerion Partners is a global venture capital firm with more than $1.8B million under management. The firm invests across all stages of consumer and enterprise companies and backed some of the fast-growing category leaders. Aerion Partners has two main offices in London and Herzliya.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $800k–$4.3M |
| Series A | $985k–$22M |
| Series B | $7M–$54M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| SaaS | 14 | 29% |
| Health Care | 14 | 29% |
| FinTech | 11 | 23% |
| Software | 11 | 23% |
| Medical | 7 | 15% |

95 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series A | 25 | 52% |
| Seed | 15 | 31% |
| Series B | 8 | 17% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United Kingdom | 16 | 33% |
| United States | 7 | 15% |
| Germany | 5 | 10% |
| Switzerland | 3 | 6% |
| India | 2 | 4% |

17 countries tracked in total.

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| VulnCheck | VulnCheck is a Cyber Threat Intelligence platform, which provides exploit and vulnerability intelligence directly into the tools, processes, programs, and systems that need it to outpace adversaries. | $12M | Series A | Mar 18, 2025 |  |
| Grain | Grain is a fintech company that develops exposure analysis, self-service, and embedded FX solutions to eliminate risk for customers. | $33M | Series A | Mar 05, 2025 |  |
| Heidi Health | Heidi Health develops an ambient AI medical scribe platform that automates clinical documentation and related tasks. It listens to patient-clinician conversations, transcribes key highlights, and then produces structured notes, referral letters, patient summaries, billing codes, and other downstream documents. The system supports customizabletemplates, allows editing during sessions, and integrates with various EHR systems while offering compliance with privacy and security standards. Clinicians in multiple specialties and care settings use Heidi to reduce administrative burden, improve focus on patient care, and streamline workflows. | $16.6M | Series A | Mar 03, 2025 |  |
| Zoplar | Zoplar operates a one-stop platform for all healthcare needs, offers a wide range of products for hospitals and clinics. | $3.4M | Series A | Jan 07, 2025 |  |
| Cyberwrite | Cyberwrite delivers a simple to use economic cyber risk assessment using proprietary technology. The company serves large companies of all sizes for use cases including cyber insurance, 3rd party risk, and self-assessment of economic cyber risk. Cyberwrite was selected as the most innovative cyber risk modeling firm of 2020 by Frost &Sullivan. Cool Vendor by Gartner in 2018 and additional awards for its innovative technology. |  | Series A | Dec 24, 2024 |  |
| MaxFense | MaxFense is a company that focuses on enhancing the security of the internet through their ethical products. Primary among their offerings is the MaxFense Endpoint Security, which enables clients to check, prevent, detect, and respond to potential information security threats, regardless of whether they originate from inside or outside theorganization. This approach aligns with contemporary security standards that have increasingly recognized the importance of robust endpoint security in the face of diversified threat vectors. | $1.1M | Seed | Dec 22, 2024 |  |
| Roon | Roon was founded by an interdisciplinary team of doctors, patients and caregivers, designers, engineers, content producers and product managers. Roon is a supportive place online for people navigating complex health conditions. Roon was established in 2021 by Arun Ranganathan in New York, United States. | $15M | Series A | Nov 25, 2024 |  |
| Deblock | Deblock offers banking services to cryptocurrency users.It assists people to cash out their cryptocurrency investments. | $16.7M | Seed | Nov 21, 2024 |  |
| Sydecar | Sydecar builds tools that remove the headache of organizing private investments -- so you can focus on making deals, not spreadsheets. Their lightweight, powerful technology helps you to manage subscription docs, compliance, banking, tax reporting, and admin for all of your deals, of any size, in one place. | $11M | Series A | Nov 20, 2024 |  |
| Centaur Labs | Centaur offers a platform and services for expert data annotation. We provide unmatched accuracy and scale by harnessing the collective intelligence of a global network of tens of thousands of students and professionals who compete with each other to be the best data annotator. | $16.2M | Series B | Oct 08, 2024 |  |

10 of 48 investments shown.

## Co-investors
- [FJ Labs](https://shizune.co/investors/profile/fj-labs) — VC Fund, 3 deals together
- [Index Ventures](https://shizune.co/investors/profile/index-ventures) — VC Fund, 3 deals together
- [Motier Ventures](https://shizune.co/investors/profile/motier-ventures) — VC Fund, 3 deals together
- [3VC](https://shizune.co/investors/profile/3vc) — VC Fund, 2 deals together
- [Bain Capital Ventures](https://shizune.co/investors/profile/bain-capital-ventures) — VC Fund, 2 deals together
- [Compagnie Nationale a Portefeuille](https://shizune.co/investors/profile/compagnie-nationale-%C3%A0-portefeuille) — VC Fund, 2 deals together

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### Similar stage
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### Similar country
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## Featured in investor lists
- [Enterprise Software VC Funds in Belgium](https://shizune.co/investors/enterprise-software-vc-funds-belgium)

## FAQ

### What does Aerion Partners invest in?

Aerion Partners invests primarily in SaaS, Health Care and FinTech startups, most often at Series A and Seed stage. Most of the 48 investments tracked by Shizune back companies in United Kingdom. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Aerion Partners's check size?

Aerion Partners typically joins rounds of $800k–$4.3M at Seed, $985k–$22M at Series A and $7M–$54M 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 Aerion Partners participates in.

### When did Aerion Partners last invest?

The most recent investment recorded for Aerion Partners closed in Mar 2025. Shizune tracks 48 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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