REGENERON PHARMACEUTICALS

Ticker: REGN CUSIP: 75886F107 Class: COM

THOMPSON SIEGEL & WALMSLEY LLC's Holding History (CIK: 0001008322)

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

Q4 2025

Shares 11,907 Value ($000) $9 Avg Close $678.68 Range $540.32 - $792.77

Q3 2025

Shares 12,082 Value ($000) $7 Avg Close $564.28 Range $519.56 - $609.69

Q2 2025

Shares 11,086 Value ($000) $6 Avg Close $556.12 Range $475.17 - $638.52

Q1 2025

Shares 10,076 Value ($000) $6 Avg Close $684.44 Range $615.89 - $745.12

Q4 2024

Shares 7,652 Value ($000) $5 Avg Close $834.60 Range $689.18 - $1055.74

Q3 2024

Shares 7,490 Value ($000) $8 Avg Close $1106.73 Range $1002.85 - $1204.52

Q2 2024

Shares 8,614 Value ($000) $9 Avg Close $964.05 Range $870.40 - $1075.21

Q1 2024

Shares 8,730 Value ($000) $8 Avg Close $945.64 Range $866.58 - $992.82

Q4 2023

Shares 11,161 Value ($000) $10 Avg Close $818.96 Range $764.95 - $894.90

Q3 2023

Shares 11,773 Value ($000) $10 Avg Close $781.58 Range $684.72 - $842.83

Q2 2023

Shares 11,436 Value ($000) $8 Avg Close $766.75 Range $681.03 - $832.93

Q1 2023

Shares 11,415 Value ($000) $9 Avg Close $750.05 Range $664.32 - $830.39

Q4 2022

Shares 10,992 Value ($000) $8 Avg Close $733.79 Range $690.81 - $774.70

Q3 2022

Shares 11,403 Value ($000) $7,855 Avg Close $625.92 Range $560.71 - $750.51

Q2 2022

Shares 11,499 Value ($000) $6,798 Avg Close $646.43 Range $535.04 - $743.30

Q1 2022

Shares 11,464 Value ($000) $8,007 Avg Close $629.16 Range $589.59 - $706.29

Q4 2021

Shares 11,393 Value ($000) $7,195 Avg Close $611.44 Range $536.21 - $670.14

Q3 2021

Shares 11,080 Value ($000) $6,705 Avg Close $617.39 Range $551.89 - $682.83

Q2 2021

Shares 10,845 Value ($000) $6,057 Avg Close $503.83 Range $466.78 - $566.85

Q1 2018

Shares 41 Value ($000) $14 Avg Close $345.90 Range $311.80 - $394.59

Q4 2017

Shares 41 Value ($000) $15 Avg Close $402.77 Range $351.19 - $474.37

Q3 2017

Shares 41 Value ($000) $18 Avg Close $473.21 Range $424.12 - $523.22

Q2 2017

Shares 41 Value ($000) $20 Avg Close $435.19 Range $358.01 - $540.55

Q1 2017

Shares 41 Value ($000) $16 Avg Close $368.62 Range $338.21 - $399.00

Q4 2016

Shares 47 Value ($000) $17 Avg Close $378.17 Range $323.56 - $450.46

Q3 2016

Shares 47 Value ($000) $19 Avg Close $398.92 Range $346.51 - $441.54

Q2 2016

Shares 47 Value ($000) $16 Avg Close $383.00 Range $327.27 - $431.54

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	11,907	$9	$678.68	$540.32 - $792.77
Q3 2025	12,082	$7	$564.28	$519.56 - $609.69
Q2 2025	11,086	$6	$556.12	$475.17 - $638.52
Q1 2025	10,076	$6	$684.44	$615.89 - $745.12
Q4 2024	7,652	$5	$834.60	$689.18 - $1055.74
Q3 2024	7,490	$8	$1106.73	$1002.85 - $1204.52
Q2 2024	8,614	$9	$964.05	$870.40 - $1075.21
Q1 2024	8,730	$8	$945.64	$866.58 - $992.82
Q4 2023	11,161	$10	$818.96	$764.95 - $894.90
Q3 2023	11,773	$10	$781.58	$684.72 - $842.83
Q2 2023	11,436	$8	$766.75	$681.03 - $832.93
Q1 2023	11,415	$9	$750.05	$664.32 - $830.39
Q4 2022	10,992	$8	$733.79	$690.81 - $774.70
Q3 2022	11,403	$7,855	$625.92	$560.71 - $750.51
Q2 2022	11,499	$6,798	$646.43	$535.04 - $743.30
Q1 2022	11,464	$8,007	$629.16	$589.59 - $706.29
Q4 2021	11,393	$7,195	$611.44	$536.21 - $670.14
Q3 2021	11,080	$6,705	$617.39	$551.89 - $682.83
Q2 2021	10,845	$6,057	$503.83	$466.78 - $566.85
Q1 2018	41	$14	$345.90	$311.80 - $394.59
Q4 2017	41	$15	$402.77	$351.19 - $474.37
Q3 2017	41	$18	$473.21	$424.12 - $523.22
Q2 2017	41	$20	$435.19	$358.01 - $540.55
Q1 2017	41	$16	$368.62	$338.21 - $399.00
Q4 2016	47	$17	$378.17	$323.56 - $450.46
Q3 2016	47	$19	$398.92	$346.51 - $441.54
Q2 2016	47	$16	$383.00	$327.27 - $431.54