ZwitterCo, Inc.
Advanced membrane technology for water and wastewater treatment
- Sector
- Clean tech
- Headquarters
- CAMBRIDGE, MA
- Founded
- 2018
- Latest Form D
- $33.4M, May 2022
- Total capital
- $40.6M
- Federal grants
- $225K
- 1 award · 2019
- At sector median 1 award
- Private capital raised
- $40.4M
- 4 Form D · last May 2022
- 54 months since last filing
- Federal contracts
- None on recordNo federal contract awards found.
- Granted patents
- None on recordNo USPTO grants. Applications publish after 18 months.
Capital timeline
Latest events
- Private capital raisedForm D · SEC · 4th filing$33.4M
- Private capital raisedForm D · SEC · 3rd filing$5M
- Private capital raisedForm D · SEC · 2nd filing$1.9M
- Federal grantNSF · Phase I · STTR Phase I: Extremely fouling-resistant nanofiltration membranes treating organic-rich wastewater$225K
- Private capital raisedForm D · SEC · 1st filing$70K
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.
Founders and team
From SEC Form D filings- Alex RappaportExecutive Officer, DirectorNamed in SEC Form D filings
- Earl JonesDirectorNamed in SEC Form D filings
- Stephen RemondiDirectorNamed in SEC Form D filings
- Steve RemondiDirectorNamed in SEC Form D filings
What it has protected
No granted patents are on record.
USPTO usually publishes applications 18 months after filing, so recent applications may not be visible yet. Patents assigned under a different entity name won’t match.
Checked: USPTO granted patents and published applications · Oct 23, 2026
Related companies, and why
- ORIGINCLEAR, INC.Similar federal contract value in Clean tech · null in contracts
- AIRCUITY INCSimilar federal contract value in Clean tech · null in contracts
- Aquipor Technologies, Inc.Similar federal contract value in Clean tech · null in contracts
- PURPOSEENERGY INCSimilar federal contract value in Clean tech · null in contracts
- World Energy LLCSimilar federal contract value in Clean tech · null in contracts
- Standard Molecular, Inc.Similar federal contract value in Clean tech · null in contracts
Regulatory activity · Clean tech
- Air Plan Approval; Michigan; Redesignation and Maintenance Plan for the Partial St. Clair 2010 1-Hour Sulfur Dioxide (SO2) NAAQS Nonattainment AreaEnvironmental Protection Agency
- Air Plan Approval; Delaware; 2006 24-Hour Fine Particulate Matter Limited Maintenance Plan for the Philadelphia Nonattainment AreaEnvironmental Protection Agency
- Air Plan Approval; Oklahoma; Updates to the State Implementation Plan for New Source Review Permitting and General SIP ProvisionsEnvironmental Protection Agency
- Epyrifenacil; Pesticide TolerancesEnvironmental Protection Agency
- Fluoxapiprolin; Pesticide TolerancesEnvironmental Protection Agency
- Chlormequat Chloride; Pesticide TolerancesEnvironmental Protection Agency
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 .