Hi. Fusion company founder from 1995 here (Fiat Lux Research, funded by DFJ). We were probably the first in the internet age, but didn't have a website (stealth mode engaged!). We definitely weren't the first. Companies which were earlier than us that I am aware of include Bogdan Maglich's Migma company (1974), Paul Koloc's Prometheus 2 (1976) and Bussard's EMC2 (1985). You could also include companies with divisions targeting fusion like General Atomics (1974) and ITT (1964).