The highlight of Netflix's fourth-quarter report was an 18.9 million add-on in subscribers -- its highest-ever quarterly add-on. That's pretty astounding for a company that's already the leader in streaming. Sales increased 16% year over year in the quarter, and its operating margin expanded five percentage points to 22%.

Fact checked by Stella Osoba If you had invested $1,000 in Netflix, Inc. (NFLX) stock 20 years ago, you'd be looking at phenomenal returns today, thanks to the company's remarkable growth. NFLX has evolved from a mail-order DVD rental service into a global streaming highflier,