In trading on Thursday, shares of Alnylam Pharmaceuticals Inc (ALNY) touched a new 52-week high of $115.43/share. That's a 145.44% rise, or $68.4 per share from the 52-week low of $47.03 set back on 04/28/2014. That means at today's intraday high, any investor who purchased ALNY stock any time over the past 52 weeks has an unrealized gain, including company insiders.

Over the past six months, insiders have been scooping up shares, and those bets are now paying off handsomely. As summarized by the table below, ALNY has seen 2 different instances of insiders buying over the trailing six month period.

START SLIDESHOW:
Ten Bargains You Can Buy Cheaper Than The Insiders Did »

Purchased Insider Title Shares Price/Share Value
01/26/2015 Steven M. Paul Director 1,000 $95.00 $95,000.00
01/26/2015 John Maraganore Chief Executive Officer 10,000 $95.00 $950,000.00
01/22/2015 Sanofi 196,251 $93.17 $18,284,705.67
01/29/2015 Sanofi 97,118 $95.00 $9,226,210.00

The chart below shows where ALNY has traded over the past year, with the 50-day and 200-day moving averages included.

Alnylam Pharmaceuticals Inc Moving Averages Chart

In afternoon trading on Thursday, ALNY shares are changing hands at $110.87/share, slightly below the new 52-week high.