Key facts
- It has raised $22.0M across 5 recorded rounds; the latest was Seed Round ($1.0M) in Jun 2025.
- Notable investors include U.S. Department of Energy, United States Department of Agriculture, Next Level Ventures, 1330 Investments, Ag Startup Engine — 19 tracked in total.
- Gross-Wen Technologies has filed 14 Form Ds with the SEC since 2018, most recently Aug 2025 ($1.0M sold to 4 investors).
- Status: Privately Held (backing).
- ·Post-money valuations for all 5 rounds
- ·The complete investor list — 19 names
- ·Watchlist + deal alerts for Gross-Wen Technologies
Funding rounds
5 roundsAbout Gross-Wen Technologies
Developer of a wastewater treatment technology designed to aid municipalities and industrial clients in sustainably treating water in effective and affordable ways. The company's revolving algae biofilm treatment system removes nitrogen, phosphorus and other pollutants from municipal and industrial wastewater, enabling clients to get an economical, eco-friendly and carbon-negative treatment for wastewater.
- Sector
- Business Products and Services (B2B)
- HQ
- Slater, IA, United States
- Founded
- 2014
- Employees
- 21
- Website
- algae.com/
- Ownership
- Privately Held (backing)
Gross-Wen Technologies doesn't have a composite mark yet — a PA Mark is published once enough pricing inputs exist (trade prints, fund marks, round prices). The rest of the record below builds toward it.
Recorded secondary trades
No secondary trades in Gross-Wen Technologies shares have been recorded yet. When a print lands — third-party, direct report, or platform — it appears here with structure, source, and price.
Institutional fund marks
No SEC-registered fund has reported a fair-value mark on Gross-Wen Technologies in its N-PORT filings yet. We sweep new filings monthly.