Marathon Venture Capital is a seed-stage venture capital firm based in Athens, Greece, that helps ambitious Greek and European founders build world-class technology companies. It recently closed its third fund at €75 million in an oversubscribed single closing.
Deal activity decreased year-over-year (1 deals in the last 12 months vs 6 prior). Average disclosed round size is $42.7M (across 35 rounds with reported amounts).
Portfolio
38
Fund Size
$85M
Top Stage
Seed
Last 12 Mo
2
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
45 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Straion | Seed | — | Jan 2026 |
| PPolymodels Hub | Series A | — | Nov 2025 |
 Niural | Series A | $31M | Jun 2025 |
 Mercury | Series C | $300M | Mar 2025 |
| Mercury | Series C | $300M | Jan 2025 |
 Delian | Series A | $14M | Jan 2025 |
 Getboon | Series A | $20.5M | Dec 2024 |
 Boon | Series A | $20.5M | Dec 2024 |
 The Uplifters Prima, PBC | Unknown | $23M | Dec 2024 |
| PPolymodels Hub | Seed | $1.4M | Jul 2024 |
 Dataform Lab | Seed | — | Jun 2024 |
 Bota Systems | Seed | $2.5M | Oct 2023 |
 Causaly | Series B | $60M | Jul 2023 |
 Velos Rotors | Seed | $2M | Apr 2023 |
 Hack The Box | Series C | $55M | Jan 2023 |
 Estoca | Unknown | $32M | Jan 2023 |
| WWelbe | Pre-Seed | $3M | May 2022 |
| CCube Rm | Series A | $8M | Dec 2021 |
| SShanghai MediTrust Health Technology Co., Ltd. | Series C | $308M | Aug 2021 |
| AAvenger Flight Group LLC | Unknown | $155M | Jul 2021 |
| Hack The Box | Series A | $10.6M | Apr 2021 |
 Connectly | Seed | $4M | Feb 2021 |
 SHUKUN | Unknown | — | Jan 2021 |
 Augmenta | Seed | — | Oct 2019 |
 Netdata | Series A | $17M | Sep 2019 |
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Top Co-Investors
Nazca5 shared
Endeavor4 shared
Canary4 shared
Paladin Capital Group3 shared
Brighteye Ventures3 shared
Osage University Partners3 shared
Coatue Management LLC2 shared
CRV2 shared
Spark Capital2 shared
Sequoia Capital2 shared
Redpoint Ventures2 shared
HCVC2 shared
The Carlyle Group2 shared
Jane Street Capital2 shared
Andreessen Horowitz2 shared
83North2 shared
Lamda Development2 shared
private angel investors2 shared
Last updated: 8 September 2026