AskVantage

Halcyon Carbon

Halcyon Carbon is a startup headquartered in San Francisco, United States, founded in 2023. It has raised at least $21.0m in outside funding, according to its filings with the US Securities and Exchange Commission (Form D), which puts it at the early stage.

Part of the 311 Institute Global Startups Directory (311institute.com). Last updated .

2023Founded
StartupStage
San Francisco, United StatesHeadquarters
TechnologyIndustry
$21.0m+Raised (SEC filings)
EarlyFunding stage
Technology
See it on the interactive mapBook a Briefing

Funding

Halcyon Carbon has raised at least $21.0m in outside funding, according to its Form D filings with the US Securities and Exchange Commission. Form D figures are a minimum: not every round is filed.

R&D ecosystem

Halcyon Carbon sits inside the Silicon Valley and the Bay Area R&D ecosystem in the Global R&D Labs Directory.

Other startups in San Francisco

Related

Questions and answers

What does Halcyon Carbon do?

Halcyon Carbon is classed in technology in its filings with the US Securities and Exchange Commission.

How much has Halcyon Carbon raised?

At least $21.0m, according to its Form D filings with the US Securities and Exchange Commission.

Where is Halcyon Carbon based?

Halcyon Carbon is headquartered in San Francisco, United States.

When was Halcyon Carbon founded?

Halcyon Carbon was founded in 2023.

Source record: SEC EDGAR (Form D filings).

© 311 Institute 2026. Facts from the official sources linked on this page. The selection, classification and links are the proprietary work of the 311 Institute, protected by copyright and database rights.