On February 3, 1931, Wilhelm von Finck, along with other industrialists, met Adolf Hitler for their first time at the Hotel Kaiserhof in Berlin.

At this meeting, von Finck and Schmitt pledged 5 million Reichsmark from Allianz to fund the SA in the event of a leftist uprising.

[5] He helped raise funds to build Haus der Kunst museum, Hitler's pet project to house the artworks, and used his hunting lodge in the Upper Bavarian Alps to entertain Nazi bigshots like Gauleiter Adolf Wagner.

[6][7] In a letter to Chamber of Commerce in 1937, he wrote: “Today, the German private banking sector is still largely made up of non-Aryan firms.

The gradual cleansing of this trade, which is strongly influenced by the Jewish element, must not be halted by the granting of applications for exemptions but must … be promoted by all means.”[8] In 1941 he was a member of the board of directors of the Grossbetschkereker Zuckerfabriks-Aktiengesellschaft, a sugar factory in Veliki Bečkerek (now Zrenjanin) in German occupied Serbia.

[11] After the end of World War II, von Finck withdrew temporarily and management was handed over to a trustee.

Von Finck spent 500,000 deutsche marks to make sure that incriminating witnesses did not appear in court or alter what they had intended to say.