Fundraising for deep tech and climate founders, from venture to infrastructure and private equity.

Equity rounds from €4M to €50M for deep tech, climate and industrial companies. We work with venture funds, corporates and, at later stages, infrastructure and private equity investors. Advised from Paris.

Why good companies stall between rounds

Deep tech companies often fall between investor types: too technical for generalist VCs, too early for growth, infrastructure or PE funds. Vinculum knows both sides and builds the round around the investors who actually fit.

Vinculum
Venture capital
Infrastructure & private equity
  1. Technology
  2. First customers
  3. Industrial scale
  4. Growth
Venture money thins out as companies scale. Infrastructure and PE funds come in only once the numbers are proven. We structure rounds that bridge the two.

What we take on

One senior team, from the first financial model to signed documents.

Fundraising

€4M to €50M equity rounds

Seed to growth rounds with venture funds, corporates and later-stage infrastructure and PE investors. Equity-led, with access to debt partners when assets need financing.

  • Investor list and outreach
  • Data room and investor questions
  • Term sheets through to close

Model, story and structure

Before you go to market

Built by people who have assessed hundreds of climate deals from the investor side.

  • Investor-grade financial model
  • Deck and business plan
  • Round structure and investor mix

M&A

Sell-side and buy-side

Exits to corporates and private equity funds, and acquisitions when growth calls for one.

  • Valuation and positioning
  • Buyer or target search
  • Negotiation through to closing

How a raise runs with us

Four stages, with the same people from the first conversation to the closing call.

  1. Diagnosis

    We look at your plan, capex profile and timing, then tell you which investors fit: venture funds, corporates, infrastructure or private equity, and where grants or debt partners can help.

  2. Preparation

    We build the financial model, deck and data room, and shape the round: its size, the investor mix and the timing.

  3. Market sounding

    We test the story with a short list of investors before the full launch, and adjust the materials to what we hear.

  4. Process and close

    We run the meetings, collect term sheets, negotiate terms and stay with you through documentation to close.

Recent mandates

Client names are confidential. Ask us for references.

  1. 2026

    Energy flexibility operator

    Seed round: positioning, investor materials and financial model ahead of market launch.

    Size
    Undisclosed
    Country
    France

    In progress

  2. 2025

    Battery storage platform

    Investor market sounding for a dual-entity raise combining equity and infrastructure debt.

    Size
    €20M+
    Country
    France

    Closed

  3. 2025

    Vertical AI for agriculture

    Seed round, full process from materials to close.

    Size
    Undisclosed
    Country
    France

    Closed

  4. 2025

    Novel clean energy production

    Project-level financial model and deal structure for a Series A+.

    Size
    Undisclosed
    Country
    France

    Closed

Who we work with

Founders building real-economy and deep tech companies, often with hardware, long R&D cycles or heavy capex, who need a partner fluent in both venture and infrastructure investors.

Deep tech

  • Photonics & sensors
  • Industrial biotech
  • Robotics
  • Advanced materials
  • Space

Energy transition

  • Solar
  • Wind
  • Hydrogen
  • Batteries
  • Energy management
  • Green molecules

Industry and resources

  • Water
  • Agtech
  • Biotech
  • Nature-based solutions
  • Resilient infrastructure
  • Underground resources

Mobility and supply chain

  • Electric fleets
  • Logistics
  • Raw materials
Vincent Ruinet

Vincent Ruinet

Founder

An engineer who has spent 15 years on every side of the table. He started Vinculum because good deep tech companies kept stalling at the same point: not for lack of technology, but because their story didn’t fit any single type of investor.

Engineer

École Polytechnique
UC Berkeley

Banker and M&A adviser

Société Générale
ENGIE

Venture investor

Future Positive Capital
Engie New Ventures

50+ transactions across infrastructure, energy and frontier tech. Depending on the mandate, Vincent works alongside a senior partner, a project finance banker, an M&A adviser, a strategist or a venture investor.

Notes on climate capital

Vincent writes on Substack about financing energy, infrastructure and frontier tech. Latest: Who pays for the robot?

Read the articles

How much could you raise?

A few quick questions about your company give you an indicative range for the equity you could raise and the debt your assets could support.

It takes about a minute. Your answers stay in your browser and are only sent to us if you choose to share them at the end.

Question 1 of 7

Tell us about your raise.

Preparing a round, exploring a sale, or want a second opinion before going to market? Send us a few lines and we’ll set up a first call.

hello@vinculumfinance.com

Useful to include

  • What you’re building and where it stands today
  • How much you want to raise, and from which kind of investors
  • When you need the money
  • Your deck, if you have one