
The lawyer-turned-developer learned that solar runs on statutes, queues and trust as much as sunshine. At Arena Renewables, that education became a near-1 GW pipeline and an acquisition before the company’s third anniversary.
Nanna Nielsen is the Chief Business Officer of Critical Loop, a Los Angeles-area industrial power company that helps factories, airports and data centers get electricity in days instead of years by pairing battery storage with autonomous control software. A Danish-born operator who once ran banking operations for fintech unicorn GoCardless - overseeing more than $52 billion in transactions for 93,000+ businesses - she now applies that same operational rigor to fixing America's grid bottleneck. The company raised a $26 million Series A in April 2026.