Celgene @ 18 months, page-53

If he's squirrelled it away! Also worth remembering that in the IPO 33% of Angioblast was vended into MSB for $10m cash.

The number of shareholders is published in the annual report.


And if you want up to date information you can buy the share registry, but I'm not sure how much light that would shed on the subject given that just provides registered holders rather than beneficial holders.

Services like bloomberg aggregate filings from mutual funds around the globe so if you have access to a terminal you can see their holdings. Bloomie has data covering who owns ~70% of shares outstanding in MSB, so the remainder is probably held mainly by local retail.