REPLIGEN CORP

Ticker: RGEN CUSIP: 759916109 Class: Common Stock

North Star Investment Management Corp.'s Holding History (CIK: 0001342857)

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

Q4 2025

Shares 150 Value ($000) $25 Avg Close $156.63 Range $134.19 - $174.01

Q3 2025

Shares 150 Value ($000) $20 Avg Close $121.47 Range $110.77 - $135.57

Q2 2025

Shares 150 Value ($000) $19 Avg Close $127.25 Range $102.97 - $148.94

Q2 2015

Shares 500 Value ($000) $21 Avg Close $36.64 Range $28.88 - $42.48

Q1 2015

Shares 500 Value ($000) $15 Avg Close $25.94 Range $19.53 - $34.15

Q4 2014

Shares 500 Value ($000) $10 Avg Close $22.36 Range $19.02 - $26.75

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	150	$25	$156.63	$134.19 - $174.01
Q3 2025	150	$20	$121.47	$110.77 - $135.57
Q2 2025	150	$19	$127.25	$102.97 - $148.94
Q2 2015	500	$21	$36.64	$28.88 - $42.48
Q1 2015	500	$15	$25.94	$19.53 - $34.15
Q4 2014	500	$10	$22.36	$19.02 - $26.75