Among WilmerHale’s industry strong suits, the start-ups and emerging companies group excels in life sciences-related work, where it teams up with the firm’s life sciences offering to provide full-service transactional and regulatory support. It additionally leverages its regulatory expertise to handle a steady stream of matters involving the technology, aerospace, and energy spheres. Daniel Zimmermann chairs the practice from Palo Alto, where his recent work includes representing start-ups in the AI, life sciences, and aerospace sectors on financings across various funding stages. Boston-based Mick Bain spearheads the transactional department and recently led a $290.3m Series B financing for Sierra Space Corporation. Other recommended practitioners include corporate and securities partner Jason Kropp, also in Boston. Frances Mosley departed the firm in February 2025, Gary Schall departed in July 2025.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘WilmerHale has strong expertise in every relevant area.’
- ‘The partners and associates bring top-tier tactical and technical legal expertise. All have a huge amount of strategic expertise that goes far above and beyond typical ordinary value. In particular, in the area of high-growth venture-backed start-ups.’
Key clients
- Immuta
- General Catalyst
Work highlights
Advised Reunion Neuroscience on its $103m Series A financing.
Practice head
Daniel Zimmermann
Other key lawyers
Mick Bain; Jason Kropp; Todd Rumberger