The businessmen of Germany from 1935 eventually got to use slave labor to build lucrative weapons... Quite a few corporations and individuals survived the war.
The Krupps are perhaps the most famous. They profited handsomely from both WW1 and WW2, managed to escape losing their fortunes during denazification (for unclear reasons), and the family still controls large amounts of wealth today: https://en.wikipedia.org/wiki/Krupp
I have a personal beef with the "profiting from war" story. In the particular case of Krupp it stands to reason whether or not spending for the war, getting their factories bombed to the ground and the lost opportunity for peace time development (and even peacetime production of arms) wasn't making the world wars a lot less "profitable" than a peace would have been. Leaving aside the discussion if peace throughout the 20th century would have been possible in slightly different circumstances.