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GROSS-WEN TECHNOLOGIES INC

Slater, IA · Agritech · Private

Slow-release algal-based fertilizer derived from wastewater

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Updated

Sector
Agritech
Headquarters
Slater, IA
Latest Form D
$1M, Jun 2025
Total capital
$8.4M
Federal grants
$800K
3 awards · 2016–2017
Rank in peer group#7 of 36
Private capital raised
$7.6M
6 Form D · last Jun 2025
16 months since last filing
Federal contracts
None on recordNo federal contract awards found.
Granted patents
9
5 pending · first 2021
Rank in peer group#2 of 36

Capital timeline

20162018202020222024FEDERAL ↑EQUITY ↓Cumulative $8.4M$100K$100K$600K1st Form D$2M5th Form D$600K6th Form D$1M
20162018202020222024FEDERAL ↑EQUITY ↓Cumulative $8.4M$100K$600K1st Form D$2M

Latest events

  • Private capital raisedForm D · SEC · 6th filing$1M
  • Private capital raisedForm D · SEC · 5th filing$600K
  • Private capital raisedForm D · SEC · 4th filing$2.5M
  • Private capital raisedForm D · SEC · 3rd filing$204K
  • Private capital raisedForm D · SEC · 2nd filing$1.2M
  • Private capital raisedForm D · SEC · 1st filing$2M
  • Federal grantAgriculture · Deriving A New Biobased Product From Wastewater: Production Of A Slow Release Algal-based Fertilizer$600K
Show 2 earlier federal awards
  • Federal grantAgriculture · Production Of Selenium-enriched Microalgae As An Animal Feed Supplement$100K
  • Federal grantAgriculture · Deriving A New Biobased Product From Wastewater: Production Of A Slow Release Algal-based Fertilizer.$100K

Node area is scaled to amount. Form D reports securities sold, which can differ from an announced round; filings are numbered in the order they were made.

Federal first

22months

from GROSS-WEN TECHNOLOGIES INC’s first federal award to its first private round.

First federal award · Aug 2016
Agriculture · $100K
First Form D · Jun 2018
$2M · 1st Form D
Awards before first raise
3 awards

An association in public records, not a cause or a prediction.

Standing among 36 peers

Line = median

Agritech · Material

  • Federal grants#7 · top 19%
  • Granted patents#2 · top 6%

Cumulative measures favor older companies. Rankings describe position today, not outcome. Below the median, ranks show as a band rather than a number.

Founders and team

Researcher links verified by same-company patents and grants
  • Martin GrossResearcherExecutive Officer, DirectorLinked by 7 patents
  • Darren JarboeDirectorNamed in SEC Form D filings
  • David FurbushExecutive Officer, DirectorNamed in SEC Form D filings
  • David TakesDirectorNamed in SEC Form D filings
  • Joseph ZubackDirectorNamed in SEC Form D filings
  • Nathan KatznerDirectorNamed in SEC Form D filings
Show all 7 people
  • Zhiyou WenExecutive Officer, DirectorNamed in SEC Form D filings

What it has protected

USPTO · 9 granted of 14
Show all 14 patent records

Related companies, and why

Regulatory activity · Agritech

Sector-level, not company-level

Rules are matched to sector, not to company. Recent activity in a sector is context rather than a signal about this business — until rules are matched to what a company actually builds, the section is shown as context and nothing more.

Sources

Federal grants from SBIR/STTR, NIH, NSF and DoD records. Federal contracts from USAspending.gov. Private capital from SEC Form D. Patents from USPTO. Publications from OpenAlex. Regulatory activity from the Federal Register. Press matched on company name.

How to read this page

Figures show associations in public records, not causes or predictions. Nothing here is investment advice. An em-dash means no record was found under this company's name, not that none exists.

Data freshness

SEC Form D filings through . SBIR and STTR awards through .