"On January 16, 2008, MySQL AB announced that it had agreed to be acquired by Sun Microsystems for approximately $1 billion"
https://en.wikipedia.org/wiki/MySQL_AB
Edit: sorry, missed the question entirely. I thought OP said "open-source businesses worth studying"
"On January 16, 2008, MySQL AB announced that it had agreed to be acquired by Sun Microsystems for approximately $1 billion"
https://en.wikipedia.org/wiki/MySQL_AB
Edit: sorry, missed the question entirely. I thought OP said "open-source businesses worth studying"