Funding newsPublished May 20, 2026

BIG Fiber Secres $250

Recently funded · $250.0M UnknownTechnology, Information and MediaUSView source

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With its 100% underground dark fiber networks serving critical data needs, BIG Fiber has closed a $250.0M funding round. The Sunnyvale, California-based company, founded in 2019, specializes in providing high-capacity, strategically placed dark fiber to mission-critical data centers, Hyperscalers, and enterprises.

BIG Fiber's infrastructure spans the San Francisco Bay Area with over 320 route miles and 65 data centers, extends to Greater Portland with more than 20 route miles and 15 data centers, and covers Greater Atlanta with over 330 route miles and 30 data centers, meeting the demand for quality new infrastructure options.

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Shane · May 20, 2026

BIG Fiber ’s $250 million raise signals how AI infrastructure investment is moving beyond GPUs and power into the physical network layer. As hyperscalers spread AI campuses into power rich regions like West Texas, Ohio, Tennessee, Louisiana, and Georgia, dark fiber is becoming critical infrastructure.

“We’re seeing customers require extreme route diversity, often moving toward tri versity or quad versity networks,” BIG Fiber CCO Patton Lochridge told Data Center Knowledge. Omdia analyst Sterling Perrin said the expansion of distributed AI campuses means “they all require massive fiber optic connectivity.” Ron Westfall of HyperFRAME Research said power shortages are reshaping network design i

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BIG Fiber Secres $250

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