Warren Buffett's holding company, Berkshire Hathaway, could go on this list. Berkshire's operating subsidiaries (Geico, Duracell, Heinz, etc) have fancy modern

Warren Buffett's holding company, Berkshire Hathaway, could go on this list. Berkshire's operating subsidiaries (Geico, Duracell, Heinz, etc) have fancy modern websites but the investment company's looks like it predates Geocities. IIRC this is because they don't want to spend money on an already functional website that isn't really selling anything.