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"Insiders might sell their shares for any number of reasons, but they buy them for only one:
they think the price will rise" - Peter Lynch ==>> What is insider trading>> |

| Transaction & Date | Reported Date |
Company | Symbol | Insider Relationship |
Shares Traded | Average Price | Total Amount |
Shares Ownership |
Filing |
| 2005-12-27- -2006-01-24 Sale |
2006-01-27 5:05 pm | REPLIGEN CORP | RGEN | DAY BARBARA BURNIM (Former Vice President) | 14,500 | $3.814 | $55,300 | 2,000 (Direct) | View |
| 2005-08-25 Sale |
2005-08-26 4:55 pm | REPLIGEN CORP | RGEN | DAY BARBARA BURNIM (Vice President) | 10,000 | $3.569 | $35,691 | 2,000 (Direct) |
View |
| Transaction & Date | Reported Date |
Company | Symbol | Insider Relationship |
Shares Traded |
Average Price |
Total Amount | Shares Ownership |
Filing |
| 2005-12-27- -2006-01-24 Exercise | 2006-01-27 5:05 pm |
REPLIGEN CORP | RGEN | DAY BARBARA BURNIM (Former Vice President) | 14,500 | $2.894 | $41,960 | 5,900 (Direct) | View |
| 2005-08-25 Exercise | 2005-08-26 4:55 pm | REPLIGEN CORP | RGEN | DAY BARBARA BURNIM (Vice President) | 10,000 | $1.37 | $13,700 | 12,000 (Direct) |
View |
| Transaction & Date |
Reported Date | Exercisable Expiration |
Company | Symbol | Insider Relationship |
Shares Traded | Conversion Price |
Shares Ownership | Filing |
| 2005-12-27 Exercise | 2006-01-27 5:05 pm | 2002-04-03 2011-04-03 | REPLIGEN CORP | RGEN | DAY BARBARA BURNIM (Former Vice President) | 8,000 | $2.66 | 10,000 (Direct) | View |
| 2006-01-19 Exercise | 2006-01-27 5:05 pm | 2005-04-20 2014-04-20 |
REPLIGEN CORP | RGEN | DAY BARBARA BURNIM (Former Vice President) | 2,000 | $3.05 | 4,000 (Direct) |
View |
| 2006-01-20 Exercise | 2006-01-27 5:05 pm | 2003-04-11 2012-04-11 | REPLIGEN CORP | RGEN | DAY BARBARA BURNIM (Former Vice President) | 600 | $3.24 | 2,600 (Direct) |
View |
| 2006-01-24 Exercise | 2006-01-27 5:05 pm | 2003-04-11 2012-04-11 |
REPLIGEN CORP | RGEN | DAY BARBARA BURNIM (Former Vice President) | 3,900 | $3.24 | 5,900 (Direct) |
View |
| 2005-08-25 Exercise |
2005-08-26 4:55 pm | 1997-10-11 2006-10-11 |
REPLIGEN CORP | RGEN | DAY BARBARA BURNIM (Vice President) | 10,000 | $1.37 | 0 (Direct) |
View |
| 2005-05-13 Option Award |
2005-05-17 1:38 pm |
2006-05-13 2015-05-13 |
REPLIGEN CORP | RGEN | DAY BARBARA BURNIM (Vice President) | 25,000 | $1.83 | 25,000 (Direct) |
View |
| 2004-04-30 Option Award |
2004-05-04 4:04 pm |
2005-04-30 2014-04-30 | REPLIGEN CORP | RGEN | DAY BARBARA BURNIM (Vice President) | 10,000 | $3.05 | 10,000 (Direct) |
View |
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