Seventure
Seventure Partners is a Paris-based venture capital firm investing in life sciences and digital technology, with a dedicated water and blue-economy fund. A subsidiary of Natixis Investment Managers, it manages close to €1 billion in assets. As of 2026 it has backed 3 water companies and tends to lead the rounds it joins.
Compiled by Antoine Walter, (don't) Waste Water, from official filings and direct intelligence in Leviathan.
The take
Seventure Partners is a generalist European venture firm that happens to write some of the most interesting water cheques in France. Founded in 1997 and owned by Natixis Investment Managers, it manages close to €1 billion across life sciences and digital technology, and its water deals arrive through one specific door: the Blue Forward Fund.
Seventure launched that fund, the Blue Forward Fund, in 2022 as one of the first European venture vehicles built for the blue economy, the cluster of businesses tied to water and the oceans. It brought in Pierre Erwes, who spent decades building the BioMarine network, as the venture partner sourcing deals, and it is backed by France's Banque Populaire banks. This is where Seventure's water thesis actually lives.
Seventure backs hardware and data, not utilities. Across the water companies (don't) Waste Water tracks, vorteX-io builds satellite-derived micro-stations that turn river levels into real-time flood data; Chemdoc Water Technologies packages reverse-osmosis and nanofiltration units for industrial reuse and drinking water; Larq sells UV-C self-cleaning bottles to consumers. Three companies, three deals, one consistent instinct: fund the picks and shovels of water, not the water itself.
Seventure is worth watching in water for one structural reason: the pairing of a billion-euro generalist balance sheet with a dedicated blue-economy team. Most water founders pitch either a climate fund or a corporate strategic, rarely a firm that can back a microbiome company and a flood-sensor company with the same conviction. For a newcomer, that is the read: water here is a deliberate thematic bet inside a much larger life-sciences house, not the whole business.
Water Commitment Score
Compiled from official filings, third-party records, and direct intelligence from investors and founders, in Leviathan · recomputed monthly · as of Jun 2026.
How they invest
Portfolio · 3 water companies
Invests alongside
Highlighted = profiled on (don't) Waste Water.
Frequently asked
- What does Seventure Partners invest in?
- Seventure Partners invests in life-sciences and digital-technology startups across Europe, from seed to growth stage. Within that, its water and blue-economy investments run through the Blue Forward Fund, covering hydrological data, water-treatment hardware, and consumer water tech. (don't) Waste Water tracks three of its water companies.
- Is Seventure Partners a water fund?
- Seventure Partners is a generalist European venture firm best known for life sciences and the microbiome, not a water-only fund. Its water exposure is a deliberate slice, channelled through the Blue Forward Fund, a dedicated blue-economy vehicle it launched in 2022 to back water and ocean businesses.
- Who runs Seventure Partners?
- Seventure Partners is led by CEO and Managing Partner Isabelle de Cremoux, who joined in 2001 to build its life-sciences practice and launched the Blue Forward Fund. The investment team includes General Partner David Manjarres, who heads digital technologies, alongside partners across venture and life sciences.
- Where is Seventure Partners based?
- Seventure Partners is based in Paris, France, and invests across Europe and beyond. Founded in 1997, it is a subsidiary of Natixis Investment Managers, part of the BPCE group, and manages close to €1 billion in assets across its life-sciences, digital, and blue-economy funds.
- What is the Blue Forward Fund?
- The Blue Forward Fund is Seventure Partners' dedicated blue-economy fund, launched in 2022 as one of the first European venture funds focused on water and the oceans. It backs companies in water, aquaculture, blue biotech, and the circular blue economy, and is where Seventure's water investments sit.