The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) by Chang Michael N since 2007.
The trader's CIK number is 1380901.
At the time of the last reporting, Chang Michael N was the CEO and President of Optimer Pharmaceuticals Inc. (stock ticker symbol OPTR).
Also see all insider trading activities at Optimer Pharmaceuticals Inc.
| Insider Buying | Insider Sales | Option Exercises | |||||
|---|---|---|---|---|---|---|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
| 2013 | OPTR | 0 | $0 | 0 | $0 | 647,315 | $5,554,330 |
| 2011 | OPTR | 0 | $0 | 0 | $0 | 100,000 | $108,300 |
| 2010 | OPTR | 0 | $0 | 0 | $0 | 157,286 | $177,864 |
| 2009 | OPTR | 33,000 | $367,625 | 0 | $0 | 51,538 | $22,315 |
| 2008 | OPTR | 9,542 | $62,410 | 0 | $0 | 0 | $0 |
| 2007 | OPTR | 166,965 | $1,251,754 | 0 | $0 | 0 | $0 |
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2013-09-04 | OPTR | Option Ex | 281,615 | 8.39 | 2,361,623 |
| 2013-04-23 | OPTR | Option Ex | 117,263 | 1.08 | 126,995 |
| 2013-04-09 | OPTR | Option Ex | 103,125 | 12.34 | 1,272,562 |
| 2013-04-03 | OPTR | Option Ex | 145,312 | 12.34 | 1,793,150 |
| 2011-04-25 | OPTR | Option Ex | 100,000 | 1.08 | 108,300 |
| 2010-06-01 | OPTR | Option Ex | 6,922 | 2.17 | 15,020 |
| 2010-01-04 | OPTR | Option Ex | 150,364 | 1.08 | 162,844 |
| 2009-12-28 | OPTR | Buy | 10,000 | 10.85 | 108,500 |
| 2009-12-29 | OPTR | Buy | 8,000 | 10.80 | 86,400 |
| 2009-11-25 | OPTR | Buy | 15,000 | 11.52 | 172,725 |
| 2009-01-07 | OPTR | Option Ex | 51,538 | .43 | 22,315 |
| 2008-06-13 | OPTR | Buy | 5,000 | 7.00 | 35,000 |
| 2008-05-15 | OPTR | Buy | 4,542 | 6.04 | 27,410 |
| 2007-11-15 | OPTR | Buy | 2,000 | 5.95 | 11,900 |
| 2007-08-09 | OPTR | Buy | 30,000 | 8.20 | 245,999 |
| 2007-08-06 | OPTR | Buy | 10,000 | 9.05 | 90,500 |
| 2007-07-16 | OPTR | Buy | 10,000 | 9.86 | 98,600 |
| 2007-02-14 | OPTR | Buy | 114,965 | 7.00 | 804,755 |
Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Chang Michael N (CEO and President of Optimer Pharmaceuticals Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.