REPLIGEN CORP

Ticker: RGEN CUSIP: 759916109 Class: Common Stock

RA CAPITAL MANAGEMENT, L.P.'s Holding History (CIK: 0001346824)

Note: Option positions (PUT/CALL) are excluded.

Q1 2015
Shares 45,000 Value ($000) $1,366 Avg Close $25.94 Range $19.53 - $34.15
Q4 2014
Shares 45,000 Value ($000) $891 Avg Close $22.36 Range $19.02 - $26.75
Q3 2014
Shares 45,000 Value ($000) $896 Avg Close $21.05 Range $18.23 - $24.68