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201 Ventures

www.201.vc · Madrid, Spain

“Advance freedom and autonomy in Europe by backing pre-seed and seed founders in defence, intelligence, security, resilience, and dual-use deep tech. Gray-zone competition between diplomacy and war creates market dislocations (sovereign demand, price inefficiencies) the firm treats as alpha.”

Leads & Follows
Lead Tendency
$22M
AUM
01Investment Thesis

Areas include hypersonics, biosecurity, subsurface mapping, maritime sensing, Arctic autonomy, electronic warfare, and advanced manufacturing.

Exclusion Criteria

Founders straddling commercial and defence at once without clarity on which comes first; ideas better suited to philanthropic or non-venture capital; companies outside Europe.

02Investment Team
ES
Eric Slesinger
Founder & General Partner
03F4 Research Brief

201 Ventures — Firm Research

Overview

201 Ventures is a Madrid-based, solo-GP early-stage venture firm founded by Eric Slesinger, a former CIA officer. Its stated mission, on its own site, is "to advance freedom and autonomy in Europe." The firm backs pre-seed and seed companies and says it leans "into technical risk, ambition, and a service mindset." The site tagline is "freedom++". Fund I closed at $22M (announced publicly in April 2025, with the fund described elsewhere as launched in January 2024), and the NATO Innovation Fund is a significant LP. In June 2026 trade press reported that Slesinger is planning a second defence fund.

Investment Thesis

The thesis is defence, intelligence, security, resilience, and dual-use deep tech in Europe. Slesinger's framing is "gray zone competition": activity between diplomacy and war that he expects to play out at scale in Europe for the next couple of decades, creating market dislocations (government acting as a sovereign buyer, price inefficiencies) that he views as a source of alpha. The NATO Innovation Fund announcement lists the solution space as hypersonics, biosecurity, subsurface mapping, maritime sensing, and Arctic autonomy. In interviews he adds advanced manufacturing, the electromagnetic spectrum, the subsurface (subsea and subterranean), and in-orbit manoeuvring as emerging "functional domains." He invests in both defence-first and dual-use companies but wants founders to be clear which side they start on and not to straddle both early.

Stage Focus

Pre-seed and seed. He likes talking to founders before the company exists. 201 continues to appear as an existing investor in later rounds (Delian Series A in July 2025, Hypersonica Series A in February 2026, Stark's June 2026 round), which suggests modest pro-rata follow-on participation, though the fund's size limits how much.

Check Size

Not disclosed. With a $22M fund and a portfolio of roughly 20 companies (16 named on the site plus several marked "[unannounced]"), initial checks are likely in the low hundreds of thousands, but this is an inference and is not stored as a structured field.

Lead Tendency

Both. 201 led the first funding round of Polar Mist (Swedish maritime drones, April 2025). It was a follower in Isembard's £7M seed (led by Notion Capital), Hypersonica's pre-seed alongside General Catalyst, Ionlace's pre-seed with Acme Capital and Heartcore, and Deep Earth's pre-seed with Inflection.

Recent Activity

  • Feb 2026: participated as an existing investor in Hypersonica's €23.3M Series A led by Plural.
  • Jun 2026: portfolio company Stark (Berlin loitering munitions) raised about €500M led by Sequoia and Founders Fund at a valuation above €3.5B; 201 Ventures is listed among its investors.
  • Jul 2025: repeat backer in Delian Alliance Industries' Series A (led by Marathon).
  • Apr 2025: led Polar Mist's first round; joined Isembard's seed.
  • Jun 2026: reported to be planning Fund II. Fund status: actively deploying, with a second fund being planned.

Portfolio Highlights

From 201.vc: Statecraft, Stark, Onodrim, Agon, Zydro, CX2, Polar Mist, Arctic R&D, Isembard, Andrenam, Deep Earth, Hypersonica, Ionlace, Delian Alliance Industries, plus five "[unannounced]" positions. Stark is the standout mark (above €3.5B valuation in 2026). Hypersonica (European hypersonic strike), Delian (Athens surveillance towers against autonomous threats), CX2 (electronic warfare), Isembard (distributed precision manufacturing), and Polar Mist (maritime autonomy) are other notable names. Geography spans Germany, Greece, Sweden, the UK, and wider Europe. Slesinger is also listed as a co-founder of Arctic Research and Development (2025), so that position may be a studio-style build rather than a pure investment.

Team

Eric Slesinger, Founder and General Partner (also styled Managing Partner). Stanford mechanical engineering, Harvard Business School, about six years at the CIA building gadgets and software for officers, time at In-Q-Tel. American and Italian; moved to Madrid in 2022. Founded the European Defense Investor Network (hundreds of investors) and organises the European Defense Tech Summit. A venture fellow focused on government relations has been noted on LinkedIn but is not confirmed on the firm site.

Decision Process

Solo GP. Decisions rest with Slesinger, which should mean fast turnaround, though no timeline is published.

Founder Preferences

Speed, hunger, and pace of learning; evidence of past excellence (he says "top 0.1% worldwide at what they've done"); ability to hire, raise, set a vision, and execute; eyes-wide-open understanding of defence realities (primes, country selection, interpreting "battle-tested" claims); clear storytelling; and advanced thinking on go-to-market, procurement, and lobbying from day one. Service orientation matters to him.

Geographic Focus

Europe, with portfolio in Germany, Greece, Sweden, the UK, and the Nordics. A US company does not appear to fit unless it is building for European sovereignty.

Gaps

Check size and fund II size are not public. Statecraft's identity (statecraft.ai) was not independently confirmed beyond the firm's own link. Five portfolio positions are unannounced.

04Selected Portfolio
Aerospace & Defense
STARK Defence·Onodrim·Polar Mist·Delian Alliance Industries·Hypersonica
Biotech & Life Sciences
IonLace
Energy & Power
Arctic R&D
Enterprise Software
Statecraft·Zydro
Gaming
Agon
Marketing & Adtech
Deep Earth
Security & Cybersecurity
CX2·Andrenam
Other
Isembard
Open the full portfolio→
05Recent Updates

Fresh signals from public announcements, essays, and portfolio activity.

See full activity (11) →
Portfolio company Stark raised about €500M led by Sequoia and Founders Fund at a valuation above €3.5B; 201 Ventures listed among investors.
MILESTONE·thenextweb.com+1
JUN 23, 2026
Trade press reported 201 Ventures is planning a second European defence fund a year after its $22M debut fund.
NEWS·websenor.com+1
JUN 2026
Participated as an existing investor in Hypersonica's €23.3M Series A led by Plural.
INVESTMENT·hypersonica.com+1
FEB 10, 2026
Eric Slesinger appeared on the slice podcast to discuss 201 Ventures' defence investing.
PODCAST·slicefund.substack.com+1
JAN 31, 2026
Joined Delian Alliance Industries' Series A, led by Marathon, as a repeat backer.
INVESTMENT·marathon.vc
JUL 29, 2025
06Frequent co-investors
AS
Air Street Capital
Both backed 4 of the same companies
Polar Mist, Delian Alliance Industries, Onodrim, STARK Defence
D
D3
Both backed 2 of the same companies
Agon, Onodrim
Find the investors for your round→
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Quick Reference
Stages
Pre-Seed · Seed
AUM
$22M
Decision
Solo GP
Location
Madrid, Spain
Sector Focus
Manufacturing & IndustrialAerospace & DefenseRobotics & AutomationSecurity & Cybersecurity
Models
Deep TechHardwareGovernment / Defense ProcurementDual-Use
Technology
HardwareAI/MLAutonomyHypersonicsElectronic Warfare
See all Manufacturing & Industrial investors →See all Aerospace & Defense investors →See all Robotics & Automation investors →
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Focus Areas
Manufacturing & IndustrialAerospace & DefenseRobotics & AutomationSecurity & Cybersecurity

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F4 Intelligence Report · Last Researched October 6, 2026F4 Research Engine