You may be right 16 million maybe what they had at the end of the first quarter 31 Mar 2012 filing and now have 73 million.
You may be right also but the article your citing is showing a decrease in comparison to their 31 Dec 2011 filing.
It is entirely possible that you are both right. They may have decreased their stake between in BSX between 31Dec 2011 till 31 mar 2012 and then increased their stake in BSX between 31 Mar 2012 till 31 July 2012.
Anybody have an answer or can show an article or a link or something that answers this question?