About Mamie Capital
Mamie Capital is a venture capital firm located in Switzerland. As of May 2012, Mamie Capital has invested in 6 companies. It primarily invests in Seed round in United States based startups. Its investments are spread across a wide range of sectors from EdTech to Life Sciences and High Tech. Most recently it participated in the $***** Seed round of BoomWriter Overall, Mamie Capital portfolio has seen 1 IPO, namely HeiQ. Mamie Capital has team of 1 people including 1 partners.Key Metrics
Team Members
Portfolio Sectors
Portfolio Locations
Rounds of Entry
Seed
Portfolio IPOs
Portfolio Soonicorns
Mamie Capital's List of Top Investments
Mamie Capital has a portfolio of 6 companies. Their most notable investmentis in BoomWriterTheir portfolio spans across Switzerland and United States. They have invested in EdTech, Life Sciences, High Tech and 6 other sectors, across stages such as Seed stage. Here is the list of top investments by Mamie Capital:
1. Xeltis
Developer of bioabsorbable synthetic heart valves and vascular grafts. The implants function as natural valves and vessels, allowing the body to heal. As the matrix gets absorbed over time, components of native tissue develop into functioning natural tissue. The flagship product is a replacement pulmonary valve for children with congenital heart malformations.
Key facts about Xeltis
- Founded Year: 2006
- Location: Zurich (Switzerland)
- Stage: Series E
- Total Funding till date: $199M
- Employee Count: 85 as on Jul 31, 2026
- Investors: Life Sciences Partners, EQT and 16 Others
- Latest Funding Round: Series E, Jul 28, 2026, $*****
- Highlight: Editors' Pick
2. HeiQ
Developer of textile technologies, coatings, polymers, and probiotic-enhanced goods. The company provides functional textile technologies for hygiene, comfort, protection, and resource efficiency. It offers high-performance coatings with transparent conductivity and antimicrobials for coatings and polymers. The company also provides goods enhanced with probiotic technology for cosmetics, water treatment, and cleaning products.
Key facts about HeiQ
- Founded Year: 2005
- Location: Schlieren (Switzerland)
- Stage: Public
- Employee Count: 108 as on Jul 31, 2026
- Investors: Credit Suisse Entrepreneur Capital, Mamie Capital and 2 Others
- Latest Funding Round: Post IPO, Feb 16, 2024, $*****
- Highlight: Public
3. AOT
Provider of a cold ablation robot-guided laser osteotome. It offers CARLO, a cold ablation robot-guided laser osteotome that provides contact-free bone surgery. It uses a small and lightweight tactile robot arm, a navigation & control software and the corresponding hardware.
Key facts about AOT
- Founded Year: 2010
- Location: Basel (Switzerland)
- Stage: Seed
- Total Funding till date: $128K
- Employee Count: 6 as on Jul 31, 2026
- Investors: SHS, Venture Kick and 1 Other
- Latest Funding Round: Seed, 2010, $*****
4. BoomWriter
Online platform for learning to write collaboratively. It helps kids to write, read and publish books to build vocabulary and for learning trending words. It also helps teachers assess student writing skills.
Key facts about BoomWriter
- Founded Year: 2010
- Location: Cambridge (United States)
- Stage: Series A
- Total Funding till date: $6.3M
- Employee Count: 3 as on Jul 31, 2026
- Investors: Avila Venture Capital, Mamie Capital and 1 Other
- Latest Funding Round: Series A, Jan 09, 2018, $*****
5. Stone Bond
Stone Bond offers a data integration platform that provides the features to configure virtual data models, access data from disparate sources, monitor sources for schema change, impact analysis, data cleansing etc.
Key facts about Stone Bond
- Founded Year: 2009
- Location: Houston (United States)
- Stage: Funding Raised
- Employee Count: 17 as on Jul 31, 2026
- Investors: Mamie Capital
Mamie Capital's Investments by Stage
Mamie Capital has made 1 investment in Seed stage with an average round size of $700K.Mamie Capital's Investments by Sector
Mamie Capital has a diverse portfolio, with companies operating in the EdTech and Media & Entertainment. Notably, it has invested in 6 Tech companies, 5 Enterprise (B2B) companies, 3 Software companies and at least 2 companies focusing on Consumer (B2C).Mamie Capital's Investments by Geography
Mamie Capital has made most investments in United States (1).Mamie Capital's recent investments
Mamie Capital has not made any investment in 2026 so far.Here are the most recent investments by Mamie Capital:
Filter this listDate | Company | Location | Round Details | Round Amount | Co-Investors |
|---|---|---|---|---|---|
May 02, 2012 | United States | Seed | 9467 | - |
IPOs and Publicly Listed companies in Mamie Capital's Portfolio
1 of Mamie Capital's portfolio company became public - HeiQ. It got listed on the London Stock Exchange (LSE), in Aug 2014.Here are Mamie Capital's portfolio companies that went public:
Company | IPO Date | First Invested on | First Round of Investment | Round Size |
|---|---|---|---|---|
Aug 22, 2014 | - | - | 9820 |
Team profile of Mamie Capital
Mamie Capital has a team of 1 member located in Switzerland. Mamie Capital's team does not sit on the board of any company as of now.Co-investors of Mamie Capital
Over the past 14 years, one investor has co-invested in Mamie Capital's portfolio companies. This includes only funds.
- Invested after Mamie Capital: Avila Venture Capital (1 company) is the only investor which has invested in Mamie Capital's portfolio after their investments.
