REPLIGEN CORP

Ticker: RGEN CUSIP: 759916109 Class: Common Stock

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q3 2025
Shares 299 Value ($000) $40 Avg Close $121.47 Range $110.77 - $135.57
Q3 2023
Shares 4,408 Value ($000) $701 Avg Close $163.47 Range $134.64 - $181.26
Q2 2023
Shares 398 Value ($000) $56 Avg Close $160.35 Range $135.37 - $182.42
Q4 2021
Shares 4,837 Value ($000) $1,281 Avg Close $269.41 Range $243.29 - $306.98
Q1 2021
Shares 1,224 Value ($000) $238 Avg Close $205.03 Range $173.09 - $228.84
Q2 2020
Shares 1,154 Value ($000) $143 Avg Close $117.64 Range $92.00 - $143.93
Q4 2019
Shares 2,799 Value ($000) $259 Avg Close $84.01 Range $72.32 - $93.50
Q3 2019
Shares 80 Value ($000) $6 Avg Close $87.47 Range $75.80 - $99.25
Q1 2019
Shares 6,361 Value ($000) $376 Avg Close $57.51 Range $49.07 - $63.41
Q1 2018
Shares 12,219 Value ($000) $442 Avg Close $35.17 Range $29.56 - $37.82
Q3 2017
Shares 2,907 Value ($000) $111 Avg Close $41.91 Range $35.73 - $46.12
Q1 2016
Shares 4,082 Value ($000) $109 Avg Close $24.47 Range $20.07 - $28.85
Q4 2015
Shares 2,935 Value ($000) $83 Avg Close $28.84 Range $21.69 - $36.00
Q3 2015
Shares 18,294 Value ($000) $509 Avg Close $36.14 Range $27.25 - $42.22
Q2 2015
Shares 12,216 Value ($000) $504 Avg Close $36.64 Range $28.88 - $42.48
Q4 2014
Shares 3,352 Value ($000) $66 Avg Close $22.36 Range $19.02 - $26.75
Q2 2014
Shares 10,904 Value ($000) $249 Avg Close $17.80 Range $12.60 - $23.14
Q1 2014
Shares 20,183 Value ($000) $260 Avg Close $14.34 Range $11.70 - $17.26
Q2 2013
Shares 22,358 Value ($000) $184 Avg Close $8.40 Range $6.65 - $9.65