Michael N. Chang serves as Executive at OPTIMER PHARMACEUTICALS INC, where they oversee executive responsibilities. Since joining the company, Michael N. Chang has executed 53 insider transactions totaling $1.7M, demonstrating a bullish approach to their equity position. Their most recent transaction on Oct 24, 2013 involved selling 1,026,956 shares valued at $11.0M.
Michael N. Chang currently holds 441,761 shares of OPTIMER PHARMACEUTICALS INC (OPTR), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Michael N. Chang has been a net buyer of OPTR stock. They have purchased $1.7M and sold $0 worth of shares.
Michael N. Chang's most recent insider trade was on Oct 24, 2013, when they sold 1,026,956 shares at $10.75 per share.
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| 441,761 |
| $10.75 |
| Discretionary |
| Sep 4, 2013 | OPTR | $102.7K | Option Exercise | 9,000 | $11.41 | Discretionary |
| Sep 4, 2013 | OPTR | $322.5K | Option Exercise | 30,000 | $10.75 | Discretionary |
| Sep 4, 2013 | OPTR | $483.0K | Option Exercise | 70,000 | $6.90 | Discretionary |
| Sep 4, 2013 | OPTR | $970.0K | Option Exercise | 100,000 | $9.70 | Discretionary |
| Sep 4, 2013 | OPTR | $291.0K | Option Exercise | 30,000 | $9.70 | Discretionary |
| Sep 4, 2013 | OPTR | $10.0K | Option Exercise | 4,615 | $2.17 | Discretionary |
| Sep 4, 2013 | OPTR | $76.5K | Option Exercise | 8,000 | $9.56 | Discretionary |
| Sep 4, 2013 | OPTR | $207.0K | Option Exercise | 30,000 | $6.90 | Discretionary |
| Apr 23, 2013 | OPTR | $126.6K | Option Exercise | 117,263 | $1.08 | Discretionary |
| Apr 9, 2013 | OPTR | $1.3M | Option Exercise | 103,125 | $12.34 | Discretionary |
| Apr 3, 2013 | OPTR | $1.8M | Option Exercise | 145,312 | $12.34 | Discretionary |
| Jan 1, 2012 | OPTR | $0 | Award | 5,000 | $N/A | Discretionary |
| Nov 15, 2011 | OPTR | $5.2K | Other | 530 | $9.72 | Discretionary |
| May 16, 2011 | OPTR | $15.2K | Other | 1,971 | $7.71 | Discretionary |
| Apr 25, 2011 | OPTR | $108.0K | Option Exercise | 100,000 | $1.08 | Discretionary |
| Nov 15, 2010 | OPTR | $8.3K | Other | 1,075 | $7.71 | Discretionary |
| Jun 1, 2010 | OPTR | $15.0K | Option Exercise | 6,922 | $2.17 | Discretionary |
| May 17, 2010 | OPTR | $13.4K | Other | 1,401 | $9.57 | Discretionary |
| May 5, 2010 | OPTR | $0 | Award | 65,000 | $N/A | Discretionary |
| Mar 29, 2010 | OPTR | $0 | Gift | 4,615 | $N/A | Discretionary |
| Jan 4, 2010 | OPTR | $64.6K | Option Exercise | 59,811 | $1.08 | Discretionary |
| Jan 4, 2010 | OPTR | $97.8K | Option Exercise | 90,553 | $1.08 | Discretionary |
| Dec 29, 2009 | OPTR | $86.4K | Purchase | 8,000 | $10.80 | Discretionary |
| Dec 28, 2009 | OPTR | $108.5K | Purchase | 10,000 | $10.85 | Discretionary |
| Nov 25, 2009 | OPTR | $80.5K | Purchase | 7,000 | $11.50 | Discretionary |
| Nov 25, 2009 | OPTR | $92.2K | Purchase | 8,000 | $11.53 | Discretionary |
| Nov 16, 2009 | OPTR | $17.0K | Other | 1,715 | $9.91 | Discretionary |
| Nov 16, 2009 | OPTR | $13.0K | Other | 1,316 | $9.91 | Discretionary |