I usually consider a first company as when it trips the full time mark: either hiring a full-time employee or working in it full-time yourself. So the web desi

I usually consider a first company as when it trips the full time mark: either hiring a full-time employee or working in it full-time yourself. So the web design gigs at 15 and forming an LLC for part-time consulting don't count. I came up with this definition after reading a book where the author bragged he'd started 10 companies by age 21... by the above definition the number was actually 2 -- still impressive.