BIG Fiber
PrivateLast Round
Debt
May 19, 2026
Total Funding Raised
$390M
Momentum
Top 5%
of companies Caplight tracks
Company Overview
BIG Fiber operates in Telecommunications & Networking and is based in Sunnyvale, California. Its latest recorded funding round was a Debt round in May 2026.
BIG Fiber is a digital infrastructure company that builds and operates high-capacity, 100% underground dark fiber networks for data centers, hyperscalers, and enterprises.
Sector
Telecommunications & Networking
Verticals
Fiber Networks, Cloud Infrastructure, Private Networks
Business Model
B2B
Customer Profile
Services & Consulting
AI Layer
Infrastructure
Historical Pricing
Historical view of private secondary pricing and transaction trends.
BIG Fiber Comparables
Compare BIG Fiber with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| SummitIG | 90% | |
| Intermountain Infrastructure Group | 87% | |
| FiberLight | 78% |
For institutional investors. Book with your work email.
BIG Fiber Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Debt | May 19, 2026 | ||||
| Debt | Jun 10, 2025 | ||||
| Debt | May 9, 2024 | ||||
| Private Equity | Oct 1, 2020 |
For institutional investors. Book with your work email.
Key People
Founding team and executive leadership
For institutional investors. Book with your work email.
BIG Fiber Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Columbia Capital | Debt |
| Caisse de dépôt et placement du Québec | Debt |
| SDC Capital Partners | Debt, Private Equity |
| ING Capital LLC | Debt |
| Third Coast Bank | Debt |
| Stonepeak | Debt |
Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 21, 2026
Monthly visitors increased 46% MoM.
- Jul 25, 2026
Monthly visitors increased 75% MoM.
For institutional investors. Book with your work email.
BIG Fiber 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.
Book a demoFor institutional investors. Book with your work email.
Frequently Asked Questions
Common questions about BIG Fiber's valuation, stock price, and market status.
Is BIG Fiber a public or private company?
BIG Fiber is a private company.
What is the current stock price of BIG Fiber?
BIG Fiber is a private company, so its shares have no public market price. Caplight tracks BIG Fiber's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is BIG Fiber worth (valuation)?
Valuation information for BIG Fiber is not publicly available.
Can I buy BIG Fiber stock?
BIG Fiber shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was BIG Fiber's last funding round?
BIG Fiber's most recent funding round was Debt on May 19, 2026.
Who are the main investors in BIG Fiber?
Key investors in BIG Fiber include Caisse de dépôt et placement du Québec, ING Capital LLC, Stonepeak.
Will BIG Fiber IPO soon?
No public IPO plans have been announced for BIG Fiber.
How can I track BIG Fiber secondary market activity?
Caplight tracks bids, offers, and trades in BIG Fiber's shares on secondary markets.