Lennar Ventures (LEN X)
Lennar Ventures, known as LenX, is the corporate venture capital arm of Lennar, one of the largest US homebuilders. It backs property and homebuilding technology, and its lone water bet is Greyter Water Systems, which recycles household greywater. As of 2026, LenX has backed one water company across two rounds.
Compiled by Antoine Walter, (don't) Waste Water, from official filings and direct intelligence in Leviathan.
The take
Lennar Ventures, which goes by LenX, is the in-house venture arm of a company that actually builds the houses its bets end up inside. LenX is the corporate venture capital arm of Lennar, one of the largest homebuilders in the United States, and it backs technology across the whole arc of a home: how it gets built, how it gets financed, and what runs through its walls.
LenX, for a water analyst, is a one-deal story, and a telling one. Its single water investment is Greyter Water Systems, a Canadian company whose flagship product, the Greyter HOME, recycles the water from a household's showers and baths, cleans it, and sends it back to flush the toilets, cutting a home's indoor water use by as much as a quarter. LenX first backed Greyter in 2020 and returned for a second round in 2023, alongside the building-products group Ferguson Ventures.
LenX's logic is pure corporate venture: Lennar does not back Greyter to flip it, but to plumb its kit into the thousands of homes it sells every year, the way it piloted the system in 29 houses at a Colorado community called Red Hawk. Water, in other words, rides into the portfolio as a feature Lennar can sell inside a house, which is why Leviathan rates LenX a One-Off on water: one company, two rounds, and a portfolio otherwise pointed at construction tech, insurance, and home finance.
LenX has had an on-and-off relationship with its own existence: after heavy paper losses on its publicly listed tech holdings, Lennar floated spinning the venture arm out in 2022 to refocus on pure homebuilding, yet LenX still describes itself today as Lennar's in-house investment and implementation platform. For anyone tracking where housing money reaches water, the open question is whether a second water bet ever follows the first.
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 · 1 water companies
Frequently asked
- What is LenX (Lennar Ventures)?
- LenX is the corporate venture capital arm of Lennar, one of the largest homebuilders in the United States. Founded in 2018, it invests in and partners with technology companies across homebuilding, home finance, and the homeowner experience, then deploys their products across Lennar's national building footprint.
- What does LenX invest in?
- LenX backs property and construction technology adjacent to Lennar's homebuilding business, spanning building methods, insurance, and mortgage technology. Its single water investment is Greyter Water Systems, a residential greywater-recycling company, which makes water a small but deliberate slice of a broader proptech portfolio.
- Who runs LenX?
- LenX is led by Eric Feder, its President since 2019 and a senior Lennar executive since 2008. Before LenX he was Vice Chairman of Lennar's Rialto Capital, and he has steered Lennar investments in real-estate technology companies including Opendoor, Hippo, and SmartRent.
- What water companies has LenX backed?
- LenX has backed one water company, Greyter Water Systems, which makes home greywater-recycling units that reuse shower and bath water for toilet flushing. Leviathan records two LenX rounds into Greyter, in 2020 and 2023, the second alongside building-products investor Ferguson Ventures.
- Is LenX the same as Millrose Properties?
- No. LenX is Lennar's venture-capital and innovation arm, the entity that makes technology investments such as Greyter. Millrose Properties is a separate land-and-homesites business that Lennar spun off as an independent, NYSE-listed company in February 2025. They share a parent in Lennar but do different things.