[doomslice]

The Stellar Development Foundation holds about half of the unallocated XLM.

They claim they'll use it in the following: https://www.stellar.org/foundation/mandate?locale=en (and they are a nonprofit so I assume they can't just sell it all).

[ur-whale]

> The Stellar Development Foundation holds about half of the unallocated XLM.

That's half of the answer :)

How much does Jed McCaleb, of MtGox fame, hold?

[exabrial]

that is a good question I suppose. I was speaking strictly to the protocol and open ecosystem.