Windfall Bio
PrivateLast Round
Series B
Nov 24, 2025
Total Funding Raised
$37M
Momentum
Top 50%
of companies Caplight tracks
Company Overview
Windfall Bio operates in Energy & Sustainability and is based in San Mateo, California. Its latest recorded funding round was a Series A round in April 2024.
Windfall Bio is an agricultural technology company that develops nature-based solutions to capture and transform methane emissions into organic soil nutrients.
Sector
Energy & Sustainability
Verticals
Carbon Capture, Biotechnology, Circular Economy, Waste Management
Business Model
B2B
Customer Profile
Hardware + Subscription, Services & Consulting, Data as a Service
AI Layer
Non-AI
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Windfall Bio Comparables
Compare Windfall Bio with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| String Bio | 77% | |
| N2 Applied | 76% | |
| Blue Ocean Barns | 71% |
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Windfall Bio Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series B | Nov 24, 2025 | ||||
| Series A | Apr 8, 2024 | ||||
| Seed | Mar 22, 2023 |
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Key People
Founding team and executive leadership
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Windfall Bio Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| B37 Ventures | Seed, Series A |
| Prelude Ventures | Series A |
| Global Brain Corporation | Series A |
| Cavallo Ventures | Seed |
| Breakthrough Energy Ventures | Seed, Series A |
| My Climate Journey Collective | Seed |
| Baruch Future Ventures | Seed |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Nov 24, 2025
Completed a Series B funding round.
- Oct 8, 2025
Began construction on a methane-to-value demonstration plant in Houston.
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Windfall Bio Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
Filing documents are not displayed on this public page. Request access to learn about available coverage.
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Frequently Asked Questions
Common questions about Windfall Bio's valuation, stock price, and market status.
Is Windfall Bio a public or private company?
Windfall Bio is a private company.
What is the current stock price of Windfall Bio?
Windfall Bio is a private company, so its shares have no public market price. Caplight tracks Windfall Bio's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Windfall Bio worth (valuation)?
Valuation information for Windfall Bio is not publicly available.
Can I buy Windfall Bio stock?
Windfall Bio shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Windfall Bio's last funding round?
Windfall Bio's most recent funding round was Series B on November 24, 2025.
Who are the main investors in Windfall Bio?
Key investors in Windfall Bio include Prelude Ventures, UNTITLED, Mayfield Fund.
Will Windfall Bio IPO soon?
No public IPO plans have been announced for Windfall Bio.
How can I track Windfall Bio secondary market activity?
Caplight tracks bids, offers, and trades in Windfall Bio's shares on secondary markets.