REPLIGEN CORP

Ticker: RGEN CUSIP: 759916109 Class: Common Stock

STATE OF MICHIGAN RETIREMENT SYSTEM's Holding History (CIK: 0000762152)

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

Q4 2025

Shares 12,553 Value ($000) $2,057 Avg Close $156.63 Range $134.19 - $174.01

Q3 2025

Shares 12,553 Value ($000) $1,678 Avg Close $121.47 Range $110.77 - $135.57

Q2 2025

Shares 12,553 Value ($000) $1,561 Avg Close $127.25 Range $102.97 - $148.94

Q1 2025

Shares 12,453 Value ($000) $1,585 Avg Close $153.93 Range $125.39 - $182.52

Q4 2024

Shares 12,353 Value ($000) $1,778 Avg Close $143.40 Range $121.52 - $161.24

Q3 2024

Shares 12,353 Value ($000) $1,838 Avg Close $143.39 Range $117.63 - $172.65

Q2 2024

Shares 12,553 Value ($000) $1,582 Avg Close $156.74 Range $113.50 - $184.98

Q1 2024

Shares 12,753 Value ($000) $2,346 Avg Close $190.44 Range $167.40 - $211.13

Q4 2023

Shares 12,453 Value ($000) $2,239 Avg Close $155.67 Range $110.45 - $188.31

Q3 2023

Shares 12,353 Value ($000) $1,964 Avg Close $163.47 Range $134.64 - $181.26

Q2 2023

Shares 12,753 Value ($000) $1,804 Avg Close $160.35 Range $135.37 - $182.42

Q1 2023

Shares 13,053 Value ($000) $2,198 Avg Close $178.42 Range $147.53 - $200.98

Q4 2022

Shares 13,153 Value ($000) $2,227 Avg Close $181.39 Range $158.58 - $225.62

Q3 2022

Shares 13,053 Value ($000) $2,442 Avg Close $210.87 Range $157.33 - $262.26

Q2 2022

Shares 13,153 Value ($000) $2,136 Avg Close $158.16 Range $137.21 - $190.59

Q1 2022

Shares 13,053 Value ($000) $2,455 Avg Close $189.96 Range $156.28 - $265.78

Q4 2021

Shares 13,077 Value ($000) $3,463 Avg Close $269.41 Range $243.29 - $306.98

Q3 2021

Shares 12,777 Value ($000) $3,692 Avg Close $256.54 Range $193.03 - $327.32

Q2 2021

Shares 12,877 Value ($000) $2,571 Avg Close $193.99 Range $162.29 - $223.03

Q1 2021

Shares 18,877 Value ($000) $3,670 Avg Close $205.03 Range $173.09 - $228.84

Q4 2020

Shares 18,377 Value ($000) $3,522 Avg Close $181.94 Range $146.52 - $212.55

Q3 2020

Shares 17,777 Value ($000) $2,623 Avg Close $142.94 Range $120.12 - $159.97

Q2 2020

Shares 17,177 Value ($000) $2,123 Avg Close $117.64 Range $92.00 - $143.93

Q1 2020

Shares 13,000 Value ($000) $1,255 Avg Close $96.54 Range $78.41 - $109.94

Q4 2019

Shares 13,800 Value ($000) $1,277 Avg Close $84.01 Range $72.32 - $93.50

Q3 2019

Shares 13,500 Value ($000) $1,035 Avg Close $87.47 Range $75.80 - $99.25

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	12,553	$2,057	$156.63	$134.19 - $174.01
Q3 2025	12,553	$1,678	$121.47	$110.77 - $135.57
Q2 2025	12,553	$1,561	$127.25	$102.97 - $148.94
Q1 2025	12,453	$1,585	$153.93	$125.39 - $182.52
Q4 2024	12,353	$1,778	$143.40	$121.52 - $161.24
Q3 2024	12,353	$1,838	$143.39	$117.63 - $172.65
Q2 2024	12,553	$1,582	$156.74	$113.50 - $184.98
Q1 2024	12,753	$2,346	$190.44	$167.40 - $211.13
Q4 2023	12,453	$2,239	$155.67	$110.45 - $188.31
Q3 2023	12,353	$1,964	$163.47	$134.64 - $181.26
Q2 2023	12,753	$1,804	$160.35	$135.37 - $182.42
Q1 2023	13,053	$2,198	$178.42	$147.53 - $200.98
Q4 2022	13,153	$2,227	$181.39	$158.58 - $225.62
Q3 2022	13,053	$2,442	$210.87	$157.33 - $262.26
Q2 2022	13,153	$2,136	$158.16	$137.21 - $190.59
Q1 2022	13,053	$2,455	$189.96	$156.28 - $265.78
Q4 2021	13,077	$3,463	$269.41	$243.29 - $306.98
Q3 2021	12,777	$3,692	$256.54	$193.03 - $327.32
Q2 2021	12,877	$2,571	$193.99	$162.29 - $223.03
Q1 2021	18,877	$3,670	$205.03	$173.09 - $228.84
Q4 2020	18,377	$3,522	$181.94	$146.52 - $212.55
Q3 2020	17,777	$2,623	$142.94	$120.12 - $159.97
Q2 2020	17,177	$2,123	$117.64	$92.00 - $143.93
Q1 2020	13,000	$1,255	$96.54	$78.41 - $109.94
Q4 2019	13,800	$1,277	$84.01	$72.32 - $93.50
Q3 2019	13,500	$1,035	$87.47	$75.80 - $99.25