David R Brennan has an estimated net worth of $13 Million. This is based on reported shares across multiple companies, which include INSMED Inc, Innocoll Holdings plc, and ALEXION PHARMACEUTICALS, INC..

2015 was David R Brennan's most active year for acquiring shares with 5 total transactions. David R Brennan's most active month to acquire stocks was the month of April. 2017 was David R Brennan's most active year for disposing of shares, totalling 4 transactions. David R Brennan's most active month to dispose stocks was the month of June. 2014 saw David R Brennan paying a total of $548,021.82 for 6,664 shares, this is the most they've acquired in one year. In 2021 David R Brennan cashed out on 28,216 shares for a total of $1,136,260.09, their largest year based on trade value.