Leo Levanas was an American citizen employed with Shell Oil Company in San Francisco during World War II. Levanas is referenced in the Venona project as having met with a Soviet intelligence officer. He then requested a meeting with the head of the San Francisco KGB office to "explore helping us." Levanas was assigned the cover name ALMA by Soviet intelligence.
Levanas is referenced in the following Venona project decryptions: 31 KGB San Francisco to Moscow, 17 January 1944 133 KGB San Francisco to Moscow, 29 March 1944.
- John Earl Haynes and Harvey Klehr, Venona: Decoding Soviet Espionage in America (New Haven: Yale University Press, 1999).