Invariant is providing DC representation to Arm Holdings, the British semiconductor design company that completed a blockbuster $5B IPO on the NASDAQ on Sept. 14.

Trading opened at $56.10 and closed at $63.59 in the IPO that ranked as the largest US listing in a decade. The stock is currently trading at $53.10.

Invariant will focus on computer, technology, and international trade matters for Arm.

Its three-member Arm team includes Sam Love (co-chair of the technology, judiciary & commerce practice), Eric Rosen (technology practice group leader), and Kevin Walsh (former IBM government & regulatory affairs executive).