"On the eve of the Facebook public float, 8 plus year in the making, I as co-founder wanted to look back and cherish Facebook's early beginning," wrote Saverin.
Saverin and Zuckerberg weren't always on the greatest of terms; in fact, as his influence in the company diminished, Saverin's shares were diluted from the original 34.4% he owned, resulting in a lawsuit. Saverin's relations with Mark Zuckerberg and Facebook were the focus of David Fincher's movie The Social Network.
The lawsuit was settled out of court; while the terms were not disclosed, from that point onwards Facebook officially confirmed Saverin as a co-founder.
Now, it seems, Saverin has managed to put all the bad blood behind him.
"Congrats to everyone involved in the project from day one till today, and I especially wanted to congratulate Mark Zukerberg on keeping tremendous stead-fast focus, however hard that was, on making the world a more open and connected place," he wrote.
The Facebook IPO, which is kicking off later today, will make Saverin a billionaire, but the Brazilian-born co-founder has been heavily criticized for renouncing US citizenship and moving to Singapore shortly before the IPO.