Ludwig Tomas Walther Rosenberg (born 17 May 1993), professionally known as Whitearmor, is a Swedish record producer from Stockholm.

He is a member of the musical collective Drain Gang, formerly known as Shield Gang and Gravity Boys, alongside recording artists Bladee, ECCO2K and Thaiboy Digital.

He started making songs in 2011 under the name DJ Cannabiz on a now deleted SoundCloud where he uploaded over 20 songs, both solo tracks and collabs, which of almost all are now deleted and lost – however, fan compilations do still float around the internet.

Whitearmor is most known for working with Yung Lean and Bladee. He has production credits on every Yung Lean album, executive producing Lean’s 2018 mixtape Poison Ivy and fourth studio album Starz.