Grosvenor
Grosvenor is the family-owned British property and investment group, controlled by the Duke of Westminster, that backs water technology through two arms: its Food & AgTech venture team and its real estate business. As of 2026, (don't) Waste Water tracks 3 water companies across 3 deals, from nutrient recovery to leak detection.
Compiled by Antoine Walter, (don't) Waste Water, from official filings and direct intelligence in Leviathan.
The take
Grosvenor is not a fund, it is a 340-year-old family business. The group traces back to 1677 and is owned by the Grosvenor family, today led by Hugh Grosvenor, the Duke of Westminster, running property across dozens of cities alongside a food and agriculture investment arm. Water turns up in both halves of that business, which is why a property dynasty appears in a water directory.
Grosvenor does its food and agriculture investing through Grosvenor Food & AgTech, the team formerly called Wheatsheaf, now jointly led by managing partners Katrin Burt and Monty Bayer. Two of its water bets live here: Ostara, which recovers phosphorus from wastewater and turns it into fertiliser, and Ozo Innovations, a UK company that uses electrolysed water to clean and disinfect without harsh chemicals. The throughline is nutrients and water that would otherwise be flushed away.
Grosvenor's other water bet came from the property side. In December 2025 the group took a strategic stake in WINT Water Intelligence, an AI system that watches the plumbing of a building, catches leaks and shuts them off before they flood a floor. It is the rare case of a landlord buying the technology it also installs, taking on WINT as both customer and shareholder across its real estate portfolio.
Grosvenor is the kind of investor the water sector tends to overlook, a patient, family-controlled owner with no need to wave the climate flag to keep writing cheques. When a 1677 estate starts buying nutrient recovery and leak detection, it is treating water less as a theme and more as plumbing it intends to own for the next century. That is the sort of capital worth watching.
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 Grosvenor invest in?
- Grosvenor invests across real estate and, through its Grosvenor Food & AgTech arm, in food and agriculture technology. Within water, (don't) Waste Water tracks 3 companies it backs: Ostara in nutrient recovery, Ozo Innovations in electrolysed-water hygiene, and WINT in building water intelligence.
- Is Grosvenor a water fund?
- No. Grosvenor is the family-owned British property and investment group controlled by the Duke of Westminster, not a dedicated water fund. It reaches water through two channels: its Food & AgTech venture team, which backs Ostara and Ozo, and its property business, which invested in WINT in 2025.
- Is Grosvenor the same as GCM Grosvenor?
- No. This profile covers Grosvenor, the London-based, family-owned property and investment group founded in 1677 and owned by the Duke of Westminster. GCM Grosvenor is a separate, US-listed Chicago alternative asset manager. The two share a name but are unrelated firms.
- Who runs Grosvenor Food & AgTech?
- Grosvenor Food & AgTech, formerly Wheatsheaf, is jointly led by managing partners Katrin Burt and Monty Bayer, appointed in November 2025. The team has invested in food and agriculture for decades and sits within Grosvenor, the Duke of Westminster's family group based in London.
- Where is Grosvenor based?
- Grosvenor is headquartered in London, in the United Kingdom, and operates across dozens of cities worldwide through regional property businesses and its Food & AgTech investment arm. The group has been owned by the Grosvenor family since 1677, led today by the Duke of Westminster.