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OTB Ventures

Deep-tech VC firm, backed in part by the NATO Innovation Fund; portfolio includes ICEYE, Hydrosat, and Alta Ares. Participated in Twentyfour Industries' $11.8M seed round (summer 2025).

Amsterdam/Warsaw deep-tech VC co-founded in 2017 by Adam Niewiński, Marcin Hejka, and Gregory Jankilevitsch, backing founders in SpaceTech, AI & Automation, FinTech, and Cybersecurity at late-Seed through Series A. Targets post-product, revenue-generating companies with international scaling potential; one of the first funds to receive NATO Innovation Fund backing (2024, $185M Fund II).

Overview

Firm
OTB Ventures
Headquarters
Amsterdam, Netherlands / Warsaw, Poland
Founded
2017
AUM
$350M+
Stages
Seed, Series A
Thesis

Portfolio companies2

Partners3

Frequently asked

What is OTB Ventures?
Amsterdam/Warsaw deep-tech VC co-founded in 2017 by Adam Niewiński, Marcin Hejka, and Gregory Jankilevitsch, backing founders in SpaceTech, AI & Automation, FinTech, and Cybersecurity at late-Seed through Series A. Targets post-product, revenue-generating companies with international scaling potential; one of the first funds to receive NATO Innovation Fund backing (2024, $185M Fund II).
How much does OTB Ventures manage?
OTB Ventures manages $350M+ in assets, and was founded in 2017.
What stages does OTB Ventures invest at?
OTB Ventures invests at Seed, Series A.

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Sources & citations3

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