REPLIGEN CORP

Ticker: RGEN CUSIP: 759916109 Class: Common Stock

ArrowMark Colorado Holdings LLC's Holding History (CIK: 0001483859)

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

Q1 2017

Shares 182,912 Value ($000) $6,439 Avg Close $31.67 Range $28.48 - $35.61

Q4 2016

Shares 150,525 Value ($000) $4,639 Avg Close $30.93 Range $26.16 - $34.06

Q3 2016

Shares 113,082 Value ($000) $3,414 Avg Close $30.18 Range $25.93 - $33.79

Q2 2016

Shares 89,535 Value ($000) $2,450 Avg Close $25.57 Range $21.11 - $28.97

Q1 2016

Shares 67,589 Value ($000) $1,813 Avg Close $24.47 Range $20.07 - $28.85

Q4 2015

Shares 64,361 Value ($000) $1,821 Avg Close $28.84 Range $21.69 - $36.00

Q3 2015

Shares 53,378 Value ($000) $1,487 Avg Close $36.14 Range $27.25 - $42.22

Q2 2015

Shares 43,533 Value ($000) $1,797 Avg Close $36.64 Range $28.88 - $42.48

Q1 2015

Shares 70,783 Value ($000) $2,149 Avg Close $25.94 Range $19.53 - $34.15

Q4 2014

Shares 56,779 Value ($000) $1,124 Avg Close $22.36 Range $19.02 - $26.75

Q3 2014

Shares 14,855 Value ($000) $296 Avg Close $21.05 Range $18.23 - $24.68

Q2 2014

Shares 10,018 Value ($000) $228 Avg Close $17.80 Range $12.60 - $23.14

Q1 2014

Shares 13,810 Value ($000) $178 Avg Close $14.34 Range $11.70 - $17.26

Q4 2013

Shares 15,588 Value ($000) $213 Avg Close $11.94 Range $9.89 - $14.05

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2017	182,912	$6,439	$31.67	$28.48 - $35.61
Q4 2016	150,525	$4,639	$30.93	$26.16 - $34.06
Q3 2016	113,082	$3,414	$30.18	$25.93 - $33.79
Q2 2016	89,535	$2,450	$25.57	$21.11 - $28.97
Q1 2016	67,589	$1,813	$24.47	$20.07 - $28.85
Q4 2015	64,361	$1,821	$28.84	$21.69 - $36.00
Q3 2015	53,378	$1,487	$36.14	$27.25 - $42.22
Q2 2015	43,533	$1,797	$36.64	$28.88 - $42.48
Q1 2015	70,783	$2,149	$25.94	$19.53 - $34.15
Q4 2014	56,779	$1,124	$22.36	$19.02 - $26.75
Q3 2014	14,855	$296	$21.05	$18.23 - $24.68
Q2 2014	10,018	$228	$17.80	$12.60 - $23.14
Q1 2014	13,810	$178	$14.34	$11.70 - $17.26
Q4 2013	15,588	$213	$11.94	$9.89 - $14.05