
- Profile
Testimonials
Collated independently by Legal 500 research team.
‘K&S has has obtained creative and successful resolutions in matters for our company across the nexus of technology, IP, and media.'
'Partners Kenny Steinthal and David Mattern provide best-in-class experience and advice.’
‘Kenny Steinthal is widely recognized as the leader in his field, and provides us with ongoing valued advice and representation defending and litigating cutting edge matters in the music copyright infringement sector.'
'The team, including David Mattern, are thoughtful, thorough, and solution-based.’
Key clients
- A&E Television Networks
- AMC Networks
- BBC
- Bloomberg TV and Radio
- TikTok
- NBCUniversal
- Disney/ESPN
- ESPN
- Fox Cable
- Google/YouTube
Work highlights
- Represented Google and its music streaming offerings on an appeal of the Web V Copyright Royalty Board's (CRB's) decision in proceedings against the labels/recording industry.
- Represented TikTok in connection with several hundred high-profile lawsuits that allege harm to underaged users of “social media," including claims related to addiction and personal injury.
- Represented Warner Bros Entertainment in a matter in which the plaintiff claimed that the 'The Accountant' was based on his idea, winning in California Superior Court, with the California Court of Appeal affirming.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.

Next generation partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
David Mattern
Practice head
Kenneth L. Steinthal
Other key lawyers
Arwen Johnson; David Mattern; Lena Colin