CIRCULARITY FUELS, INC.
Sorption-enhanced catalytic system that converts biogas CO2 into methane for renewable natural gas production from wastewater and agricultural waste streams
- Sector
- Clean tech
- Headquarters
- REDWOOD CITY, CA
- Latest Form D
- $8.8M, Oct 2026
- Total capital
- $9.1M
- Federal grants
- $275K
- 1 award · 2024
- Rank in peer group#15 of 47
- Private capital raised
- $8.8M
- 1 Form D · last Oct 2026
- 0 months since last filing
- Federal contracts
- None on recordNo federal contract awards found.
- Granted patents
- 0
- 11 pending
Capital timeline
Latest events
- Private capital raisedForm D · SEC · 1st filing$8.8M
- Federal grantNSF · Phase I · SBIR Phase I: Sorbent-Enhanced Catalysis for Robust, High-Conversion Single Pass Hydrogenation for Renewable Natural Gas Production$275K
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
25months
from CIRCULARITY FUELS, INC.’s first federal award to its first private round.
- First federal award · Sep 2024
- NSF · $275K
- First Form D · Oct 2026
- $8.8M · 1st Form D
- Awards before first raise
- 1 award
An association in public records, not a cause or a prediction.
Standing among 47 peers
Line = medianClean tech · System
- Federal grants#15 · top 32%
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
No founders are linked to this company yet.
Founders appear once a person is matched to the company through its own patents, grants or filings. We never infer people from social profiles.
Checked: USPTO inventors; federal award principal investigators; SEC Form D related persons · Oct 23, 2026
Claim this profile to add your teamWhat it has protected
USPTO · 0 granted of 11- PendingSystem And Method For Resistively Heated Element For Thermal ReactorUSPTOApplication 19368890
- PendingSystem And Method For Atmospheric Pressure Methane EnrichmentUSPTOApplication 19194670
- PendingSystem And Method For Single Reactor Carbon Dioxide Capture And Conversion To High Purity Methane With Potential Isotopic EnrichmentUSPTOApplication 18822253
Show all 11 patent records
- System And Method For Resistively Heated Element For Thermal ReactorJun 18, 2026 · Application 19368890Pending
- System And Method For Atmospheric Pressure Methane EnrichmentOct 30, 2025 · Application 19194670Pending
- System And Method For Single Reactor Carbon Dioxide Capture And Conversion To High Purity Methane With Potential Isotopic EnrichmentMar 6, 2025 · Application 18822253Pending
- System And Method For Resistively Heated Element For Thermal ReactorApplication 63712193Pending
- System And Method For Single Reactor Carbon Dioxide Capture And Conversion To High Purity Methane With Potential Isotopic EnrichmentApplication PCTUS2024044930Pending
- System And Method For Atmospheric Pressure Methane EnrichmentApplication 63640547Pending
- System and Method for Single Reactor Carbon Dioxide Capture and Conversion to High Purity Methane with Potential Isotopic EnrichmentApplication 63536039Pending
- System And Method For Resistively Heated Element For Thermal ReactorApplication PCTUS2025052498Pending
- System And Method For Atmospheric Pressure Methane EnrichmentApplication 19490772Pending
- System And Method For Atmospheric Pressure Methane EnrichmentApplication PCTUS2025027046Pending
- System And Method For Resistively Heated Element For Thermal ReactorApplication 63755866Pending
Related companies, and why
- Opus 12 IncorporatedSimilar federal contract value in Clean tech · null in contracts
- POWDER WATTS, LLCSimilar federal contract value in Clean tech · null in contracts
- PYRAN INCSimilar federal contract value in Clean tech · null in contracts
- CONFLUENCY LLCSimilar federal contract value in Clean tech · null in contracts
- BIOMINERAL SYSTEMS LLCSimilar federal contract value in Clean tech · null in contracts
- ENCORE CO2 LLCSimilar 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 .