REPLIGEN CORP

Ticker: RGEN CUSIP: 759916109 Class: Common Stock

MASON STREET ADVISORS, LLC's Holding History (CIK: 0001167711)

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

Q4 2020

Shares 26,880 Value ($000) $5,151 Avg Close $181.94 Range $146.52 - $212.55

Q3 2020

Shares 26,133 Value ($000) $3,856 Avg Close $142.94 Range $120.12 - $159.97

Q2 2020

Shares 25,797 Value ($000) $3,189 Avg Close $117.64 Range $92.00 - $143.93

Q1 2020

Shares 24,921 Value ($000) $2,406 Avg Close $96.54 Range $78.41 - $109.94

Q4 2019

Shares 24,921 Value ($000) $2,305 Avg Close $84.01 Range $72.32 - $93.50

Q3 2019

Shares 24,322 Value ($000) $1,865 Avg Close $87.47 Range $75.80 - $99.25

Q2 2019

Shares 14,030 Value ($000) $1,206 Avg Close $68.16 Range $52.87 - $86.16

Q1 2019

Shares 12,554 Value ($000) $742 Avg Close $57.51 Range $49.07 - $63.41

Q4 2018

Shares 12,122 Value ($000) $639 Avg Close $58.65 Range $48.26 - $70.50

Q3 2018

Shares 11,552 Value ($000) $641 Avg Close $51.54 Range $45.00 - $58.99

Q2 2018

Shares 10,851 Value ($000) $510 Avg Close $41.16 Range $34.61 - $47.87

Q1 2018

Shares 10,399 Value ($000) $376 Avg Close $35.17 Range $29.56 - $37.82

Q4 2017

Shares 9,744 Value ($000) $354 Avg Close $36.20 Range $31.96 - $40.05

Q3 2017

Shares 9,461 Value ($000) $363 Avg Close $41.91 Range $35.73 - $46.12

Q2 2017

Shares 9,135 Value ($000) $379 Avg Close $38.00 Range $32.73 - $46.81

Q1 2017

Shares 7,914 Value ($000) $279 Avg Close $31.67 Range $28.48 - $35.61

Q4 2016

Shares 7,393 Value ($000) $228 Avg Close $30.93 Range $26.16 - $34.06

Q2 2016

Shares 6,576 Value ($000) $180 Avg Close $25.57 Range $21.11 - $28.97

Q1 2016

Shares 5,872 Value ($000) $157 Avg Close $24.47 Range $20.07 - $28.85

Q4 2015

Shares 5,310 Value ($000) $150 Avg Close $28.84 Range $21.69 - $36.00

Q3 2015

Shares 4,849 Value ($000) $135 Avg Close $36.14 Range $27.25 - $42.22

Q2 2015

Shares 4,266 Value ($000) $176 Avg Close $36.64 Range $28.88 - $42.48

Q1 2015

Shares 4,084 Value ($000) $124 Avg Close $25.94 Range $19.53 - $34.15

Q4 2014

Shares 3,957 Value ($000) $78 Avg Close $22.36 Range $19.02 - $26.75

Q3 2014

Shares 3,830 Value ($000) $76 Avg Close $21.05 Range $18.23 - $24.68

Q2 2014

Shares 3,811 Value ($000) $87 Avg Close $17.80 Range $12.60 - $23.14

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	26,880	$5,151	$181.94	$146.52 - $212.55
Q3 2020	26,133	$3,856	$142.94	$120.12 - $159.97
Q2 2020	25,797	$3,189	$117.64	$92.00 - $143.93
Q1 2020	24,921	$2,406	$96.54	$78.41 - $109.94
Q4 2019	24,921	$2,305	$84.01	$72.32 - $93.50
Q3 2019	24,322	$1,865	$87.47	$75.80 - $99.25
Q2 2019	14,030	$1,206	$68.16	$52.87 - $86.16
Q1 2019	12,554	$742	$57.51	$49.07 - $63.41
Q4 2018	12,122	$639	$58.65	$48.26 - $70.50
Q3 2018	11,552	$641	$51.54	$45.00 - $58.99
Q2 2018	10,851	$510	$41.16	$34.61 - $47.87
Q1 2018	10,399	$376	$35.17	$29.56 - $37.82
Q4 2017	9,744	$354	$36.20	$31.96 - $40.05
Q3 2017	9,461	$363	$41.91	$35.73 - $46.12
Q2 2017	9,135	$379	$38.00	$32.73 - $46.81
Q1 2017	7,914	$279	$31.67	$28.48 - $35.61
Q4 2016	7,393	$228	$30.93	$26.16 - $34.06
Q2 2016	6,576	$180	$25.57	$21.11 - $28.97
Q1 2016	5,872	$157	$24.47	$20.07 - $28.85
Q4 2015	5,310	$150	$28.84	$21.69 - $36.00
Q3 2015	4,849	$135	$36.14	$27.25 - $42.22
Q2 2015	4,266	$176	$36.64	$28.88 - $42.48
Q1 2015	4,084	$124	$25.94	$19.53 - $34.15
Q4 2014	3,957	$78	$22.36	$19.02 - $26.75
Q3 2014	3,830	$76	$21.05	$18.23 - $24.68
Q2 2014	3,811	$87	$17.80	$12.60 - $23.14