Perkins Coie LLP

From the website:

With nearly 300 lawyers in Seattle, ours is the largest law office in the city. Our Seattle attorneys provide legal counsel and representation to leading national and international clients in many industry segments, including aerospace, high-technology, clean-tech, retail and consumer goods, manufacturing, finance, natural resources, healthcare and transportation. We partner with clients to provide them with business-oriented legal advice in every major area of commercial and regulatory law and litigation.