CompuLab and also Yahoo while they are still discussing with Google and ThinkPenguin. I believe Linux Mint is enjoying their current status as number 1 Linux distribution based on Distrowatch ranking.
Clem also reminds that Linux Mint has reached it's End of Life. There will be no more updates on Linux Mint. He also mentioned the end of life date for other releases:
- Linux Mint 11 will be supported until October 2012.
- Linux Mint 9 and Linux Mint 12 will be supported until April 2013.
- The upcoming Linux Mint 13 will be supported until April 2017