REPLIGEN CORP

Ticker: RGEN CUSIP: 759916109 Class: Common Stock

Spark Investment Management LLC's Holding History (CIK: 0001554871)

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

Q1 2014

Shares 63,900 Value ($000) $821 Avg Close $14.34 Range $11.70 - $17.26

Q4 2013

Shares 53,800 Value ($000) $732 Avg Close $11.94 Range $9.89 - $14.05

Q3 2013

Shares 22,900 Value ($000) $253 Avg Close $9.95 Range $8.25 - $11.44

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2014	63,900	$821	$14.34	$11.70 - $17.26
Q4 2013	53,800	$732	$11.94	$9.89 - $14.05
Q3 2013	22,900	$253	$9.95	$8.25 - $11.44