REGENERON PHARMACEUTICALS

Ticker: REGN CUSIP: 75886F107 Class: COM

BROWN BROTHERS HARRIMAN & CO's Holding History (CIK: 0000014661)

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

Q4 2025

Shares 1,065 Value ($000) $822 Avg Close $678.68 Range $540.32 - $792.77

Q3 2025

Shares 508 Value ($000) $286 Avg Close $564.28 Range $519.56 - $609.69

Q2 2025

Shares 248 Value ($000) $130 Avg Close $556.12 Range $475.17 - $638.52

Q1 2025

Shares 278 Value ($000) $176 Avg Close $684.44 Range $615.89 - $745.12

Q4 2024

Shares 527 Value ($000) $375 Avg Close $834.60 Range $689.18 - $1055.74

Q3 2024

Shares 482 Value ($000) $507 Avg Close $1106.73 Range $1002.85 - $1204.52

Q2 2024

Shares 484 Value ($000) $509 Avg Close $964.05 Range $870.40 - $1075.21

Q1 2024

Shares 502 Value ($000) $483 Avg Close $945.64 Range $866.58 - $992.82

Q4 2023

Shares 691 Value ($000) $607 Avg Close $818.96 Range $764.95 - $894.90

Q3 2023

Shares 646 Value ($000) $532 Avg Close $781.58 Range $684.72 - $842.83

Q2 2023

Shares 344 Value ($000) $247 Avg Close $766.75 Range $681.03 - $832.93

Q1 2023

Shares 591 Value ($000) $486 Avg Close $750.05 Range $664.32 - $830.39

Q4 2022

Shares 569 Value ($000) $411 Avg Close $733.79 Range $690.81 - $774.70

Q3 2022

Shares 365 Value ($000) $251 Avg Close $625.92 Range $560.71 - $750.51

Q2 2022

Shares 364 Value ($000) $215 Avg Close $646.43 Range $535.04 - $743.30

Q1 2022

Shares 378 Value ($000) $264 Avg Close $629.16 Range $589.59 - $706.29

Q4 2021

Shares 331 Value ($000) $209 Avg Close $611.44 Range $536.21 - $670.14

Q3 2021

Shares 570 Value ($000) $345 Avg Close $617.39 Range $551.89 - $682.83

Q2 2021

Shares 564 Value ($000) $315 Avg Close $503.83 Range $466.78 - $566.85

Q1 2021

Shares 691 Value ($000) $327 Avg Close $484.19 Range $438.57 - $555.83

Q4 2020

Shares 1,716 Value ($000) $829 Avg Close $536.82 Range $468.18 - $616.55

Q3 2020

Shares 1,647 Value ($000) $922 Avg Close $602.99 Range $537.02 - $660.97

Q2 2020

Shares 1,772 Value ($000) $1,105 Avg Close $564.49 Range $473.82 - $642.77

Q1 2020

Shares 451 Value ($000) $220 Avg Close $410.21 Range $326.32 - $515.14

Q4 2019

Shares 603 Value ($000) $226 Avg Close $334.59 Range $270.76 - $380.14

Q3 2019

Shares 508 Value ($000) $141 Avg Close $294.28 Range $269.87 - $318.99

Q2 2019

Shares 403 Value ($000) $126 Avg Close $331.08 Range $293.64 - $413.60

Q1 2019

Shares 627 Value ($000) $257 Avg Close $409.51 Range $363.99 - $439.56

Q4 2018

Shares 631 Value ($000) $236 Avg Close $364.00 Range $325.77 - $407.74

Q3 2018

Shares 631 Value ($000) $255 Avg Close $378.49 Range $340.69 - $414.19

Q2 2018

Shares 615 Value ($000) $212 Avg Close $311.03 Range $280.34 - $347.31

Q1 2018

Shares 615 Value ($000) $212 Avg Close $345.90 Range $311.80 - $394.59

Q4 2017

Shares 729 Value ($000) $274 Avg Close $402.77 Range $351.19 - $474.37

Q3 2017

Shares 786 Value ($000) $351 Avg Close $473.21 Range $424.12 - $523.22

Q2 2017

Shares 801 Value ($000) $393 Avg Close $435.19 Range $358.01 - $540.55

Q1 2017

Shares 901 Value ($000) $349 Avg Close $368.62 Range $338.21 - $399.00

Q4 2016

Shares 895 Value ($000) $329 Avg Close $378.17 Range $323.56 - $450.46

Q3 2016

Shares 780 Value ($000) $314 Avg Close $398.92 Range $346.51 - $441.54

Q2 2016

Shares 781 Value ($000) $273 Avg Close $383.00 Range $327.27 - $431.54

Q1 2016

Shares 863 Value ($000) $311 Avg Close $409.79 Range $347.04 - $529.97

Q4 2015

Shares 1,932 Value ($000) $1,049 Avg Close $538.82 Range $445.63 - $589.32

Q3 2015

Shares 1,932 Value ($000) $899 Avg Close $534.07 Range $433.12 - $602.59

Q2 2015

Shares 1,925 Value ($000) $982 Avg Close $485.93 Range $431.08 - $541.00

Q1 2015

Shares 1,925 Value ($000) $869 Avg Close $421.46 Range $390.83 - $492.77

Q4 2014

Shares 2,325 Value ($000) $954 Avg Close $391.09 Range $318.29 - $435.23

Q3 2014

Shares 2,400 Value ($000) $865 Avg Close $333.32 Range $283.49 - $367.27

Q2 2014

Shares 2,700 Value ($000) $763 Avg Close $294.74 Range $268.01 - $318.24

Q1 2014

Shares 2,700 Value ($000) $811 Avg Close $306.39 Range $261.52 - $350.55

Q4 2013

Shares 2,700 Value ($000) $743 Avg Close $286.03 Range $256.27 - $317.74

Q3 2013

Shares 2,700 Value ($000) $845 Avg Close $261.58 Range $224.53 - $318.07

Q2 2013

Shares 2,700 Value ($000) $607 Avg Close $231.58 Range $176.14 - $282.42

Q1 2013

Shares 2,700 Value ($000) $476 Avg Close $170.72 Range $153.31 - $184.76

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,065	$822	$678.68	$540.32 - $792.77
Q3 2025	508	$286	$564.28	$519.56 - $609.69
Q2 2025	248	$130	$556.12	$475.17 - $638.52
Q1 2025	278	$176	$684.44	$615.89 - $745.12
Q4 2024	527	$375	$834.60	$689.18 - $1055.74
Q3 2024	482	$507	$1106.73	$1002.85 - $1204.52
Q2 2024	484	$509	$964.05	$870.40 - $1075.21
Q1 2024	502	$483	$945.64	$866.58 - $992.82
Q4 2023	691	$607	$818.96	$764.95 - $894.90
Q3 2023	646	$532	$781.58	$684.72 - $842.83
Q2 2023	344	$247	$766.75	$681.03 - $832.93
Q1 2023	591	$486	$750.05	$664.32 - $830.39
Q4 2022	569	$411	$733.79	$690.81 - $774.70
Q3 2022	365	$251	$625.92	$560.71 - $750.51
Q2 2022	364	$215	$646.43	$535.04 - $743.30
Q1 2022	378	$264	$629.16	$589.59 - $706.29
Q4 2021	331	$209	$611.44	$536.21 - $670.14
Q3 2021	570	$345	$617.39	$551.89 - $682.83
Q2 2021	564	$315	$503.83	$466.78 - $566.85
Q1 2021	691	$327	$484.19	$438.57 - $555.83
Q4 2020	1,716	$829	$536.82	$468.18 - $616.55
Q3 2020	1,647	$922	$602.99	$537.02 - $660.97
Q2 2020	1,772	$1,105	$564.49	$473.82 - $642.77
Q1 2020	451	$220	$410.21	$326.32 - $515.14
Q4 2019	603	$226	$334.59	$270.76 - $380.14
Q3 2019	508	$141	$294.28	$269.87 - $318.99
Q2 2019	403	$126	$331.08	$293.64 - $413.60
Q1 2019	627	$257	$409.51	$363.99 - $439.56
Q4 2018	631	$236	$364.00	$325.77 - $407.74
Q3 2018	631	$255	$378.49	$340.69 - $414.19
Q2 2018	615	$212	$311.03	$280.34 - $347.31
Q1 2018	615	$212	$345.90	$311.80 - $394.59
Q4 2017	729	$274	$402.77	$351.19 - $474.37
Q3 2017	786	$351	$473.21	$424.12 - $523.22
Q2 2017	801	$393	$435.19	$358.01 - $540.55
Q1 2017	901	$349	$368.62	$338.21 - $399.00
Q4 2016	895	$329	$378.17	$323.56 - $450.46
Q3 2016	780	$314	$398.92	$346.51 - $441.54
Q2 2016	781	$273	$383.00	$327.27 - $431.54
Q1 2016	863	$311	$409.79	$347.04 - $529.97
Q4 2015	1,932	$1,049	$538.82	$445.63 - $589.32
Q3 2015	1,932	$899	$534.07	$433.12 - $602.59
Q2 2015	1,925	$982	$485.93	$431.08 - $541.00
Q1 2015	1,925	$869	$421.46	$390.83 - $492.77
Q4 2014	2,325	$954	$391.09	$318.29 - $435.23
Q3 2014	2,400	$865	$333.32	$283.49 - $367.27
Q2 2014	2,700	$763	$294.74	$268.01 - $318.24
Q1 2014	2,700	$811	$306.39	$261.52 - $350.55
Q4 2013	2,700	$743	$286.03	$256.27 - $317.74
Q3 2013	2,700	$845	$261.58	$224.53 - $318.07
Q2 2013	2,700	$607	$231.58	$176.14 - $282.42
Q1 2013	2,700	$476	$170.72	$153.31 - $184.76