REGENERON PHARMACEUTICALS

Ticker: REGN CUSIP: 75886F107 Class: COM

PRICE T ROWE ASSOCIATES INC /MD/'s Holding History (CIK: 0000080255)

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

Q4 2025

Shares 1,949,797 Value ($000) $1,505 Avg Close $678.68 Range $540.32 - $792.77

Q3 2025

Shares 804,910 Value ($000) $453 Avg Close $564.28 Range $519.56 - $609.69

Q2 2025

Shares 766,444 Value ($000) $402 Avg Close $556.12 Range $475.17 - $638.52

Q1 2025

Shares 2,175,026 Value ($000) $1,379 Avg Close $684.44 Range $615.89 - $745.12

Q4 2024

Shares 2,085,447 Value ($000) $1,486 Avg Close $834.60 Range $689.18 - $1055.74

Q3 2024

Shares 1,275,303 Value ($000) $1,341 Avg Close $1106.73 Range $1002.85 - $1204.52

Q2 2024

Shares 932,874 Value ($000) $980 Avg Close $964.05 Range $870.40 - $1075.21

Q1 2024

Shares 902,613 Value ($000) $869 Avg Close $945.64 Range $866.58 - $992.82

Q4 2023

Shares 718,052 Value ($000) $631 Avg Close $818.96 Range $764.95 - $894.90

Q3 2023

Shares 2,217,665 Value ($000) $1,825 Avg Close $781.58 Range $684.72 - $842.83

Q2 2023

Shares 2,252,263 Value ($000) $1,618 Avg Close $766.75 Range $681.03 - $832.93

Q1 2023

Shares 2,178,232 Value ($000) $1,790 Avg Close $750.05 Range $664.32 - $830.39

Q4 2022

Shares 1,723,722 Value ($000) $1,244 Avg Close $733.79 Range $690.81 - $774.70

Q3 2022

Shares 1,750,561 Value ($000) $1,205,910 Avg Close $625.92 Range $560.71 - $750.51

Q2 2022

Shares 1,694,308 Value ($000) $1,001,556 Avg Close $646.43 Range $535.04 - $743.30

Q1 2022

Shares 880,341 Value ($000) $614,848 Avg Close $629.16 Range $589.59 - $706.29

Q4 2021

Shares 913,255 Value ($000) $576,739 Avg Close $611.44 Range $536.21 - $670.14

Q3 2021

Shares 809,840 Value ($000) $490,099 Avg Close $617.39 Range $551.89 - $682.83

Q2 2021

Shares 824,844 Value ($000) $460,708 Avg Close $503.83 Range $466.78 - $566.85

Q1 2021

Shares 862,743 Value ($000) $408,198 Avg Close $484.19 Range $438.57 - $555.83

Q4 2020

Shares 867,999 Value ($000) $419,339 Avg Close $536.82 Range $468.18 - $616.55

Q3 2020

Shares 913,992 Value ($000) $511,634 Avg Close $602.99 Range $537.02 - $660.97

Q2 2020

Shares 1,123,386 Value ($000) $700,600 Avg Close $564.49 Range $473.82 - $642.77

Q1 2020

Shares 1,007,333 Value ($000) $491,871 Avg Close $410.21 Range $326.32 - $515.14

Q4 2019

Shares 791,123 Value ($000) $297,051 Avg Close $334.59 Range $270.76 - $380.14

Q3 2019

Shares 867,000 Value ($000) $240,506 Avg Close $294.28 Range $269.87 - $318.99

Q2 2019

Shares 804,402 Value ($000) $251,778 Avg Close $331.08 Range $293.64 - $413.60

Q1 2019

Shares 1,757,126 Value ($000) $721,511 Avg Close $409.51 Range $363.99 - $439.56

Q4 2018

Shares 648,938 Value ($000) $242,378 Avg Close $364.00 Range $325.77 - $407.74

Q3 2018

Shares 587,955 Value ($000) $237,557 Avg Close $378.49 Range $340.69 - $414.19

Q2 2018

Shares 703,885 Value ($000) $242,833 Avg Close $311.03 Range $280.34 - $347.31

Q1 2018

Shares 689,755 Value ($000) $237,524 Avg Close $345.90 Range $311.80 - $394.59

Q4 2017

Shares 710,066 Value ($000) $266,956 Avg Close $402.77 Range $351.19 - $474.37

Q3 2017

Shares 771,730 Value ($000) $345,056 Avg Close $473.21 Range $424.12 - $523.22

Q2 2017

Shares 818,906 Value ($000) $402,197 Avg Close $435.19 Range $358.01 - $540.55

Q1 2017

Shares 1,111,875 Value ($000) $430,863 Avg Close $368.62 Range $338.21 - $399.00

Q4 2016

Shares 1,079,790 Value ($000) $396,380 Avg Close $378.17 Range $323.56 - $450.46

Q3 2016

Shares 1,197,464 Value ($000) $481,404 Avg Close $398.92 Range $346.51 - $441.54

Q2 2016

Shares 1,815,993 Value ($000) $634,199 Avg Close $383.00 Range $327.27 - $431.54

Q1 2016

Shares 4,019,777 Value ($000) $1,448,888 Avg Close $409.79 Range $347.04 - $529.97

Q4 2015

Shares 4,738,293 Value ($000) $2,572,277 Avg Close $538.82 Range $445.63 - $589.32

Q3 2015

Shares 4,798,155 Value ($000) $2,231,814 Avg Close $534.07 Range $433.12 - $602.59

Q2 2015

Shares 4,246,785 Value ($000) $2,166,412 Avg Close $485.93 Range $431.08 - $541.00

Q1 2015

Shares 3,876,501 Value ($000) $1,750,163 Avg Close $421.46 Range $390.83 - $492.77

Q4 2014

Shares 3,939,854 Value ($000) $1,616,325 Avg Close $391.09 Range $318.29 - $435.23

Q3 2014

Shares 3,259,662 Value ($000) $1,175,173 Avg Close $333.32 Range $283.49 - $367.27

Q2 2014

Shares 2,794,301 Value ($000) $789,306 Avg Close $294.74 Range $268.01 - $318.24

Q1 2014

Shares 4,102,890 Value ($000) $1,232,016 Avg Close $306.39 Range $261.52 - $350.55

Q4 2013

Shares 5,997,354 Value ($000) $1,650,712 Avg Close $286.03 Range $256.27 - $317.74

Q3 2013

Shares 5,996,886 Value ($000) $1,876,246 Avg Close $261.58 Range $224.53 - $318.07

Q2 2013

Shares 6,326,889 Value ($000) $1,422,791 Avg Close $231.58 Range $176.14 - $282.42

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,949,797	$1,505	$678.68	$540.32 - $792.77
Q3 2025	804,910	$453	$564.28	$519.56 - $609.69
Q2 2025	766,444	$402	$556.12	$475.17 - $638.52
Q1 2025	2,175,026	$1,379	$684.44	$615.89 - $745.12
Q4 2024	2,085,447	$1,486	$834.60	$689.18 - $1055.74
Q3 2024	1,275,303	$1,341	$1106.73	$1002.85 - $1204.52
Q2 2024	932,874	$980	$964.05	$870.40 - $1075.21
Q1 2024	902,613	$869	$945.64	$866.58 - $992.82
Q4 2023	718,052	$631	$818.96	$764.95 - $894.90
Q3 2023	2,217,665	$1,825	$781.58	$684.72 - $842.83
Q2 2023	2,252,263	$1,618	$766.75	$681.03 - $832.93
Q1 2023	2,178,232	$1,790	$750.05	$664.32 - $830.39
Q4 2022	1,723,722	$1,244	$733.79	$690.81 - $774.70
Q3 2022	1,750,561	$1,205,910	$625.92	$560.71 - $750.51
Q2 2022	1,694,308	$1,001,556	$646.43	$535.04 - $743.30
Q1 2022	880,341	$614,848	$629.16	$589.59 - $706.29
Q4 2021	913,255	$576,739	$611.44	$536.21 - $670.14
Q3 2021	809,840	$490,099	$617.39	$551.89 - $682.83
Q2 2021	824,844	$460,708	$503.83	$466.78 - $566.85
Q1 2021	862,743	$408,198	$484.19	$438.57 - $555.83
Q4 2020	867,999	$419,339	$536.82	$468.18 - $616.55
Q3 2020	913,992	$511,634	$602.99	$537.02 - $660.97
Q2 2020	1,123,386	$700,600	$564.49	$473.82 - $642.77
Q1 2020	1,007,333	$491,871	$410.21	$326.32 - $515.14
Q4 2019	791,123	$297,051	$334.59	$270.76 - $380.14
Q3 2019	867,000	$240,506	$294.28	$269.87 - $318.99
Q2 2019	804,402	$251,778	$331.08	$293.64 - $413.60
Q1 2019	1,757,126	$721,511	$409.51	$363.99 - $439.56
Q4 2018	648,938	$242,378	$364.00	$325.77 - $407.74
Q3 2018	587,955	$237,557	$378.49	$340.69 - $414.19
Q2 2018	703,885	$242,833	$311.03	$280.34 - $347.31
Q1 2018	689,755	$237,524	$345.90	$311.80 - $394.59
Q4 2017	710,066	$266,956	$402.77	$351.19 - $474.37
Q3 2017	771,730	$345,056	$473.21	$424.12 - $523.22
Q2 2017	818,906	$402,197	$435.19	$358.01 - $540.55
Q1 2017	1,111,875	$430,863	$368.62	$338.21 - $399.00
Q4 2016	1,079,790	$396,380	$378.17	$323.56 - $450.46
Q3 2016	1,197,464	$481,404	$398.92	$346.51 - $441.54
Q2 2016	1,815,993	$634,199	$383.00	$327.27 - $431.54
Q1 2016	4,019,777	$1,448,888	$409.79	$347.04 - $529.97
Q4 2015	4,738,293	$2,572,277	$538.82	$445.63 - $589.32
Q3 2015	4,798,155	$2,231,814	$534.07	$433.12 - $602.59
Q2 2015	4,246,785	$2,166,412	$485.93	$431.08 - $541.00
Q1 2015	3,876,501	$1,750,163	$421.46	$390.83 - $492.77
Q4 2014	3,939,854	$1,616,325	$391.09	$318.29 - $435.23
Q3 2014	3,259,662	$1,175,173	$333.32	$283.49 - $367.27
Q2 2014	2,794,301	$789,306	$294.74	$268.01 - $318.24
Q1 2014	4,102,890	$1,232,016	$306.39	$261.52 - $350.55
Q4 2013	5,997,354	$1,650,712	$286.03	$256.27 - $317.74
Q3 2013	5,996,886	$1,876,246	$261.58	$224.53 - $318.07
Q2 2013	6,326,889	$1,422,791	$231.58	$176.14 - $282.42