Bluestem Capital
Bluestem Capital is a Sioux Falls, South Dakota private equity firm that backs Midwest companies, with occasional water deals. Bluestem is a generalist investor across healthcare, manufacturing, and business services; as of 2026 it has backed 2 water companies across 3 deals in membrane filtration and digital water.
Compiled by Antoine Walter, (don't) Waste Water, from official filings and direct intelligence in Leviathan.
The take
Bluestem Capital is the fund a water-tech founder rarely has on the radar, and that is rather the point. Working out of a downtown Sioux Falls office across more than 20 investment funds, Bluestem is a conservative, generalist Midwest private equity and venture firm, with capital spread over healthcare, eyecare, manufacturing, and plain business services. Water has never been its headline.
Bluestem's water story is short and specific. The firm has backed two water companies across three deals, both squarely in water-treatment technology: PolyCera Membranes, which makes next-generation ultrafiltration membranes, and IntelliFlux Controls, whose software automates and predicts how filtration systems run. One is the hardware of cleaner water, the other the brains, and Bluestem backed both.
Bluestem is therefore an occasional water investor, not a water fund, and worth filing as exactly that. Its last water deal closed in 2020, and the firm's more recent activity has run to medical and eyecare names rather than filtration. For a newcomer mapping who actually funds water, Bluestem belongs in the generalists-who-have-dipped-in column: a name to call for a Midwest, basic-industry deal far more than for a frontier water thesis.
Team · 3 profiled
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 · 2 water companies
Invests alongside
Highlighted = profiled on (don't) Waste Water.
Frequently asked
- What does Bluestem Capital invest in?
- Bluestem Capital is a generalist Midwest private equity and venture firm based in Sioux Falls, South Dakota. It backs companies across healthcare, eyecare, manufacturing, and business services. In water specifically Bluestem is an occasional investor, holding two water-technology companies in its portfolio as of 2026.
- How many water companies has Bluestem Capital backed?
- Bluestem Capital has backed two water companies across three funding deals, both in water-treatment technology: PolyCera Membranes (ultrafiltration membranes) and IntelliFlux Controls (filtration-control software). Bluestem's most recent water deal closed in 2020, and (don't) Waste Water rates its water commitment Occasional.
- Where is Bluestem Capital based?
- Bluestem Capital is headquartered in downtown Sioux Falls, South Dakota, in the United States. Bluestem is a Midwest-focused private equity firm investing largely in the region's basic-industry, healthcare, and business-services companies, and has raised more than twenty investment funds over its history.
- Is Bluestem Capital a water fund?
- No. Bluestem Capital is a diversified Midwest private equity firm, not a dedicated water fund. Water is a small, occasional part of its portfolio: two filtration-technology companies, with no new water deal since 2020. Specialist water funds invest far more heavily and frequently in the sector.
- Is Bluestem Capital the same as Bluestem Capital Partners?
- Bluestem Capital here refers to the Sioux Falls, South Dakota private equity and venture firm at bluestemcapital.com. Several unrelated firms share the Bluestem name, including a Nebraska municipal-advisory company. This profile and its water investments concern only the Sioux Falls Midwest private equity firm.