Michael N. Chang is Director at OPTIMER PHARMACEUTICALS INC (OPTR). They have made 9 open-market trades across 1 company since 2007, most recently 2013-10-24.
CIK 0001380901
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
9 open-market purchases totalling $1.7M since 2007, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| OPTR | 441,761 | — |
Shares reported on the most recent Form 4, priced at the 2013-09-06 close. 1 holding could not be priced and is excluded from the total.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| OPTR | BUY | 2009-12-28 | 2009-12-29 | $10.83 | $195K | N/A | N/A | N/A |
| OPTR | BUY | 2009-11-25 | 2009-11-25 | $11.52 | $173K | N/A | N/A | N/A |
| OPTR | BUY | 2008-06-13 | 2008-06-17 | $7.00 | $35K | N/A | N/A | N/A |
| OPTR | BUY | 2008-05-15 | 2008-05-16 | $6.04 | $27K | N/A | N/A | N/A |
| OPTR | BUY | 2007-11-15 | 2007-11-19 | $5.95 | $6K | N/A | N/A | N/A |
| OPTR | BUY | 2007-08-09 | 2007-08-10 | $8.20 | $246K | N/A | N/A | N/A |
| OPTR | BUY | 2007-08-06 | 2007-08-08 | $9.05 | $91K | N/A | N/A | N/A |
| OPTR | BUY | 2007-07-16 | 2007-07-18 | $9.86 | $99K | N/A | N/A | N/A |
| OPTR | BUY | 2007-02-14 | 2007-02-14 | $7.00 | $805K | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.