REGENERON PHARMACEUTICALS

Ticker: REGN CUSIP: 75886F107 Class: COM

GRANDFIELD & DODD, LLC's Holding History (CIK: 0001308016)

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

Q4 2025

Shares 36,568 Value ($000) $28,226 Avg Close $678.68 Range $540.32 - $792.77

Q3 2025

Shares 36,451 Value ($000) $20,495 Avg Close $564.28 Range $519.56 - $609.69

Q2 2025

Shares 35,205 Value ($000) $18,483 Avg Close $556.12 Range $475.17 - $638.52

Q1 2025

Shares 33,207 Value ($000) $21,061 Avg Close $684.44 Range $615.89 - $745.12

Q4 2024

Shares 32,596 Value ($000) $23,219 Avg Close $834.60 Range $689.18 - $1055.74

Q3 2024

Shares 32,328 Value ($000) $33,984 Avg Close $1106.73 Range $1002.85 - $1204.52

Q2 2024

Shares 32,336 Value ($000) $33,986 Avg Close $964.05 Range $870.40 - $1075.21

Q1 2024

Shares 32,277 Value ($000) $31,066 Avg Close $945.64 Range $866.58 - $992.82

Q4 2023

Shares 32,202 Value ($000) $28,283 Avg Close $818.96 Range $764.95 - $894.90

Q3 2023

Shares 32,242 Value ($000) $26,534 Avg Close $781.58 Range $684.72 - $842.83

Q2 2023

Shares 31,479 Value ($000) $22,619 Avg Close $766.75 Range $681.03 - $832.93

Q1 2023

Shares 30,925 Value ($000) $25,410 Avg Close $750.05 Range $664.32 - $830.39

Q4 2022

Shares 30,476 Value ($000) $21,988 Avg Close $733.79 Range $690.81 - $774.70

Q3 2022

Shares 30,272 Value ($000) $20,850 Avg Close $625.92 Range $560.71 - $750.51

Q2 2022

Shares 29,274 Value ($000) $17,300 Avg Close $646.43 Range $535.04 - $743.30

Q1 2022

Shares 28,774 Value ($000) $20,100 Avg Close $629.16 Range $589.59 - $706.29

Q4 2021

Shares 27,797 Value ($000) $17,550 Avg Close $611.44 Range $536.21 - $670.14

Q3 2021

Shares 26,031 Value ($000) $15,750 Avg Close $617.39 Range $551.89 - $682.83

Q2 2021

Shares 21,636 Value ($000) $12,080 Avg Close $503.83 Range $466.78 - $566.85

Q1 2021

Shares 18,562 Value ($000) $8,780 Avg Close $484.19 Range $438.57 - $555.83

Q4 2020

Shares 17,755 Value ($000) $8,580 Avg Close $536.82 Range $468.18 - $616.55

Q3 2020

Shares 16,670 Value ($000) $9,330 Avg Close $602.99 Range $537.02 - $660.97

Q2 2020

Shares 16,661 Value ($000) $10,390 Avg Close $564.49 Range $473.82 - $642.77

Q1 2020

Shares 17,084 Value ($000) $8,342 Avg Close $410.21 Range $326.32 - $515.14

Q4 2019

Shares 15,965 Value ($000) $5,995 Avg Close $334.59 Range $270.76 - $380.14

Q3 2019

Shares 13,617 Value ($000) $3,777 Avg Close $294.28 Range $269.87 - $318.99

Q2 2019

Shares 11,598 Value ($000) $3,630 Avg Close $331.08 Range $293.64 - $413.60

Q1 2019

Shares 8,978 Value ($000) $3,687 Avg Close $409.51 Range $363.99 - $439.56

Q4 2018

Shares 8,695 Value ($000) $3,248 Avg Close $364.00 Range $325.77 - $407.74

Q3 2018

Shares 7,173 Value ($000) $2,898 Avg Close $378.49 Range $340.69 - $414.19

Q2 2018

Shares 5,846 Value ($000) $2,017 Avg Close $311.03 Range $280.34 - $347.31

Q1 2018

Shares 2,445 Value ($000) $842 Avg Close $345.90 Range $311.80 - $394.59

Q4 2017

Shares 1,734 Value ($000) $652 Avg Close $402.77 Range $351.19 - $474.37

Q3 2017

Shares 1,647 Value ($000) $736 Avg Close $473.21 Range $424.12 - $523.22

Q2 2017

Shares 1,532 Value ($000) $752 Avg Close $435.19 Range $358.01 - $540.55

Q1 2017

Shares 1,497 Value ($000) $580 Avg Close $368.62 Range $338.21 - $399.00

Q4 2016

Shares 1,480 Value ($000) $543 Avg Close $378.17 Range $323.56 - $450.46

Q3 2016

Shares 1,300 Value ($000) $523 Avg Close $398.92 Range $346.51 - $441.54

Q2 2016

Shares 1,175 Value ($000) $410 Avg Close $383.00 Range $327.27 - $431.54

Q1 2016

Shares 1,127 Value ($000) $406 Avg Close $409.79 Range $347.04 - $529.97

Q4 2015

Shares 780 Value ($000) $423 Avg Close $538.82 Range $445.63 - $589.32

Q3 2015

Shares 673 Value ($000) $313 Avg Close $534.07 Range $433.12 - $602.59

Q2 2015

Shares 699 Value ($000) $357 Avg Close $485.93 Range $431.08 - $541.00

Q1 2015

Shares 742 Value ($000) $335 Avg Close $421.46 Range $390.83 - $492.77

Q4 2014

Shares 742 Value ($000) $304 Avg Close $391.09 Range $318.29 - $435.23

Q3 2014

Shares 742 Value ($000) $268 Avg Close $333.32 Range $283.49 - $367.27

Q2 2014

Shares 722 Value ($000) $204 Avg Close $294.74 Range $268.01 - $318.24

Q1 2014

Shares 677 Value ($000) $203 Avg Close $306.39 Range $261.52 - $350.55

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	36,568	$28,226	$678.68	$540.32 - $792.77
Q3 2025	36,451	$20,495	$564.28	$519.56 - $609.69
Q2 2025	35,205	$18,483	$556.12	$475.17 - $638.52
Q1 2025	33,207	$21,061	$684.44	$615.89 - $745.12
Q4 2024	32,596	$23,219	$834.60	$689.18 - $1055.74
Q3 2024	32,328	$33,984	$1106.73	$1002.85 - $1204.52
Q2 2024	32,336	$33,986	$964.05	$870.40 - $1075.21
Q1 2024	32,277	$31,066	$945.64	$866.58 - $992.82
Q4 2023	32,202	$28,283	$818.96	$764.95 - $894.90
Q3 2023	32,242	$26,534	$781.58	$684.72 - $842.83
Q2 2023	31,479	$22,619	$766.75	$681.03 - $832.93
Q1 2023	30,925	$25,410	$750.05	$664.32 - $830.39
Q4 2022	30,476	$21,988	$733.79	$690.81 - $774.70
Q3 2022	30,272	$20,850	$625.92	$560.71 - $750.51
Q2 2022	29,274	$17,300	$646.43	$535.04 - $743.30
Q1 2022	28,774	$20,100	$629.16	$589.59 - $706.29
Q4 2021	27,797	$17,550	$611.44	$536.21 - $670.14
Q3 2021	26,031	$15,750	$617.39	$551.89 - $682.83
Q2 2021	21,636	$12,080	$503.83	$466.78 - $566.85
Q1 2021	18,562	$8,780	$484.19	$438.57 - $555.83
Q4 2020	17,755	$8,580	$536.82	$468.18 - $616.55
Q3 2020	16,670	$9,330	$602.99	$537.02 - $660.97
Q2 2020	16,661	$10,390	$564.49	$473.82 - $642.77
Q1 2020	17,084	$8,342	$410.21	$326.32 - $515.14
Q4 2019	15,965	$5,995	$334.59	$270.76 - $380.14
Q3 2019	13,617	$3,777	$294.28	$269.87 - $318.99
Q2 2019	11,598	$3,630	$331.08	$293.64 - $413.60
Q1 2019	8,978	$3,687	$409.51	$363.99 - $439.56
Q4 2018	8,695	$3,248	$364.00	$325.77 - $407.74
Q3 2018	7,173	$2,898	$378.49	$340.69 - $414.19
Q2 2018	5,846	$2,017	$311.03	$280.34 - $347.31
Q1 2018	2,445	$842	$345.90	$311.80 - $394.59
Q4 2017	1,734	$652	$402.77	$351.19 - $474.37
Q3 2017	1,647	$736	$473.21	$424.12 - $523.22
Q2 2017	1,532	$752	$435.19	$358.01 - $540.55
Q1 2017	1,497	$580	$368.62	$338.21 - $399.00
Q4 2016	1,480	$543	$378.17	$323.56 - $450.46
Q3 2016	1,300	$523	$398.92	$346.51 - $441.54
Q2 2016	1,175	$410	$383.00	$327.27 - $431.54
Q1 2016	1,127	$406	$409.79	$347.04 - $529.97
Q4 2015	780	$423	$538.82	$445.63 - $589.32
Q3 2015	673	$313	$534.07	$433.12 - $602.59
Q2 2015	699	$357	$485.93	$431.08 - $541.00
Q1 2015	742	$335	$421.46	$390.83 - $492.77
Q4 2014	742	$304	$391.09	$318.29 - $435.23
Q3 2014	742	$268	$333.32	$283.49 - $367.27
Q2 2014	722	$204	$294.74	$268.01 - $318.24
Q1 2014	677	$203	$306.39	$261.52 - $350.55