Do any of the largest Wallets have known owners?

I found https://bitcointalk.org/index.php?PHPSESSID=h72gmr1luhb169j1...

which shows that the top two wallets are gone now and the 80,000BTC Wallet has grown to 111111.11

The top 400 goes down to about 3,000BTC. A bunch of those could be the former largest ones broken up.

That is awesome. If you follow the chain of transactions from 12RYJjGk22NiNbhTHffCrCso4XgVzet5Eh (biggest wallet). It all ended up in a MtGox account...

Wow, this is a fascinating list. So we know there are at least 25 bitcoin millionaires (bitcoin wallets with value > $1,000,000 USD).

For such large amounts, you can't simply calculate the number of bitcoins * price per bitcoin, since the act of selling such large amounts would itself affect the price.

This is true, of course (and a pet peeve of mine when people naively calculate e.g. how much it would cost to replace all coal-fired power plants in the world with solar). However, these days MtGox's average daily volume is in the $1m range. I think you could sell $1m BTC over a couple of weeks without anyone even noticing.

Same applies to a lot of wealthy people in shares. If they sold all their shares, they'd make the share price plummet and they wouldn't get anywhere as much as you initially quoted.

As volume picks up (market depth has nearly tripled in 2 months) this is a lesser problem.

No, we know that there is some fuzzy nebulous number of bitcoin millionaires which may be centered around 25 - more based on how many have coins split across many addresses, and less based on the known fact that many earlier miners didn't store their coins safely (because it was just an interesting crypto prototype they were playing with) and many tens of thousands of coins have been lost. (That Polish exchange running on Amazon without backups took out, IIRC, something like 10k all on its own.)