# Marc Griefahn

> Marc Griefahn is a seed investor at Weinmann Emergency backing Mobile. See 2 investments, round sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Fund: Weinmann Emergency
- Location: Hamburg, Germany
- Total investments: 2
- Last investment: Mar 2023
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/pub/marc-griefahn/5/b06/a87

Marc Griefahn is a seed investor at Weinmann Emergency in Hamburg focused on Mobile and mHealth. Marc Griefahn is Chairman of Weinmann Emergency, the leading respiratory resuscitation company, with headquarters in Hamburg, Germany. Marc is also a venture Investor in Germany and Great Britain. Marc has a Masters in Economics from Hamburg University. He is married with three kids.

## Contacts

5 contacts available for Marc Griefahn: 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/marc-griefahn?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Mobile | 1 | 50% |
| mHealth | 1 | 50% |
| Internet | 1 | 50% |
| Software | 1 | 50% |
| Health Care | 1 | 50% |

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 1 | 50% |
| Pre-Seed | 1 | 50% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Oska Health | Oska Health delivers digital-enabled care solutions for chronic kidney disease patients, a top clinical need for healthcare payers. By leveraging evidence-based medical best practices and behavioral science, Oska Health aims to empower individuals with kidney disease to mitigate their risk of cardiovascular complications and kidney failure whilesimultaneously lowering costs of care. The company partners with healthcare payers to provide a comprehensive solution that includes a personal coach, a state-of-the-art health app, and intelligent treatment plan algorithms, all designed to help individuals establish new routines and achieve optimal health outcomes. | $2.7M | Pre-Seed | Mar 06, 2023 |  |
| BEETmobile | BEETmobile offers a software solution that enables broadband subscribers and mobile internet users to securely share their internet connection with the BEETmobile community via WiFi. In return, they get access to all the other member's internet connections on all WLAN enabled devices. | $500K | Seed | Jun 01, 2011 |  |

2 of 2 investments shown.

## Co-investors
- [Calm/Storm VC](https://shizune.co/investors/profile/calm-storm-ventures) — VC Fund, 1 deal together
- [Hessen Kapital](https://shizune.co/investors/profile/hessen-kapital) — VC Fund, 1 deal together
- [Hessen Kapital I](https://shizune.co/investors/profile/hessen-kapital-i-gmbh) — VC Fund, 1 deal together
- [LBBW VC](https://shizune.co/investors/profile/lbbw-venture-capital-gmbh) — VC Fund, 1 deal together

## About Weinmann Emergency

VC Fund · Hamburg, Germany

Weinmann Emergency is a supplier of medical technology equipment.

1 contacts available at Weinmann Emergency.

| Name | Title | Profile |
| --- | --- | --- |
| Marc Griefahn | Chairman | https://shizune.co/investors/profile/marc-griefahn |

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### Similar stage
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- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

## FAQ

### What does Marc Griefahn invest in?

Marc Griefahn invests primarily in Mobile, mHealth and Internet startups, most often at Seed and Pre-Seed stage. Most of the 2 investments tracked by Shizune back companies in Germany. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Marc Griefahn?

Public channels for Marc Griefahn include LinkedIn. 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 Marc Griefahn last invest?

The most recent investment recorded for Marc Griefahn closed in Mar 2023. Shizune tracks 2 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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