Key facts
- Mare Custos’s last known valuation is $2.5M (Apr 2023).
- It has raised $150K; the latest was Seed Round in Mar 2025.
- Notable investors include Plus Venture Capital, Startup Tunisia, Taqadam (Accelerator), The DOT.
- Status: Privately Held (backing).
- ·The complete investor list — 4 names
- ·Watchlist + deal alerts for Mare Custos
- ·The full record, as it builds
Funding rounds
No funding rounds for Mare Custos are on record yet — either the company hasn't raised institutional capital, or the raise hasn't surfaced in our sources.
About Mare Custos
Developer of underwater exploration devices designed for industries to afford underwater bots at reasonable prices. The company's technology is an inspection-class ROV (remotely operated vehicle) that integrates with a vast array of payloads and third-party modules and sensors, enabling industries to ensure ease of maintenance, upgrades, and underwater missions.
- Sector
- Information Technology
- HQ
- Plouzane, France
- Founded
- 2020
- Employees
- 24
- Website
- mare-custos.com/
- Ownership
- Privately Held (backing)
Mare Custos doesn't have a composite mark yet — a PA Mark is published once enough pricing inputs exist (trade prints, fund marks, round prices). The rest of the record below builds toward it.
Recorded secondary trades
No secondary trades in Mare Custos shares have been recorded yet. When a print lands — third-party, direct report, or platform — it appears here with structure, source, and price.
Institutional fund marks
No SEC-registered fund has reported a fair-value mark on Mare Custos in its N-PORT filings yet. We sweep new filings monthly.