That would be Microsoft.

"The spokesperson also referred us to the latest phishing and malware data from NSS Labs, the same security company that found IE8 was the most secure browser in August 2009 via two Microsoft-sponsored reports."

I don't know who funded the study but I'd much rather trust the Pwn2Own contest. Its all very well to say a browser is safe, but in real life when you have security and hacking experts at work on it, that's when you find out if the browser is secure or not.

I find it interesting that Chrome actually survived day one of the Pwn2Own contest. I would have thought Firefox would be the winner.