REGENERON PHARMACEUTICALS

Ticker: REGN CUSIP: 75886F107 Class: COM

HARBOR INVESTMENT ADVISORY, LLC's Holding History (CIK: 0001468792)

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

Q4 2025

Shares 2,499 Value ($000) $1,929 Avg Close $678.68 Range $540.32 - $792.77

Q3 2025

Shares 2,648 Value ($000) $1,489 Avg Close $564.28 Range $519.56 - $609.69

Q2 2025

Shares 2,675 Value ($000) $1,404 Avg Close $556.12 Range $475.17 - $638.52

Q1 2025

Shares 3,198 Value ($000) $2,028 Avg Close $684.44 Range $615.89 - $745.12

Q4 2024

Shares 3,612 Value ($000) $2,573 Avg Close $834.60 Range $689.18 - $1055.74

Q3 2024

Shares 3,664 Value ($000) $3,852 Avg Close $1106.73 Range $1002.85 - $1204.52

Q2 2024

Shares 3,764 Value ($000) $3,956 Avg Close $964.05 Range $870.40 - $1075.21

Q1 2024

Shares 3,708 Value ($000) $3,569 Avg Close $945.64 Range $866.58 - $992.82

Q4 2023

Shares 3,673 Value ($000) $3,226 Avg Close $818.96 Range $764.95 - $894.90

Q3 2023

Shares 3,623 Value ($000) $2,982 Avg Close $781.58 Range $684.72 - $842.83

Q2 2023

Shares 3,628 Value ($000) $2,607 Avg Close $766.75 Range $681.03 - $832.93

Q1 2023

Shares 3,628 Value ($000) $2,981 Avg Close $750.05 Range $664.32 - $830.39

Q4 2022

Shares 4,028 Value ($000) $2,906 Avg Close $733.79 Range $690.81 - $774.70

Q3 2022

Shares 4,078 Value ($000) $2,809 Avg Close $625.92 Range $560.71 - $750.51

Q2 2022

Shares 4,391 Value ($000) $2,596 Avg Close $646.43 Range $535.04 - $743.30

Q1 2022

Shares 4,735 Value ($000) $3,307 Avg Close $629.16 Range $589.59 - $706.29

Q4 2021

Shares 4,623 Value ($000) $2,920 Avg Close $611.44 Range $536.21 - $670.14

Q3 2021

Shares 4,889 Value ($000) $2,959 Avg Close $617.39 Range $551.89 - $682.83

Q2 2021

Shares 4,744 Value ($000) $2,650 Avg Close $503.83 Range $466.78 - $566.85

Q1 2021

Shares 4,228 Value ($000) $2,000 Avg Close $484.19 Range $438.57 - $555.83

Q4 2020

Shares 3,768 Value ($000) $1,820 Avg Close $536.82 Range $468.18 - $616.55

Q3 2020

Shares 945 Value ($000) $529 Avg Close $602.99 Range $537.02 - $660.97

Q2 2020

Shares 826 Value ($000) $515 Avg Close $564.49 Range $473.82 - $642.77

Q1 2020

Shares 802 Value ($000) $392 Avg Close $410.21 Range $326.32 - $515.14

Q4 2019

Shares 715 Value ($000) $268 Avg Close $334.59 Range $270.76 - $380.14

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	2,499	$1,929	$678.68	$540.32 - $792.77
Q3 2025	2,648	$1,489	$564.28	$519.56 - $609.69
Q2 2025	2,675	$1,404	$556.12	$475.17 - $638.52
Q1 2025	3,198	$2,028	$684.44	$615.89 - $745.12
Q4 2024	3,612	$2,573	$834.60	$689.18 - $1055.74
Q3 2024	3,664	$3,852	$1106.73	$1002.85 - $1204.52
Q2 2024	3,764	$3,956	$964.05	$870.40 - $1075.21
Q1 2024	3,708	$3,569	$945.64	$866.58 - $992.82
Q4 2023	3,673	$3,226	$818.96	$764.95 - $894.90
Q3 2023	3,623	$2,982	$781.58	$684.72 - $842.83
Q2 2023	3,628	$2,607	$766.75	$681.03 - $832.93
Q1 2023	3,628	$2,981	$750.05	$664.32 - $830.39
Q4 2022	4,028	$2,906	$733.79	$690.81 - $774.70
Q3 2022	4,078	$2,809	$625.92	$560.71 - $750.51
Q2 2022	4,391	$2,596	$646.43	$535.04 - $743.30
Q1 2022	4,735	$3,307	$629.16	$589.59 - $706.29
Q4 2021	4,623	$2,920	$611.44	$536.21 - $670.14
Q3 2021	4,889	$2,959	$617.39	$551.89 - $682.83
Q2 2021	4,744	$2,650	$503.83	$466.78 - $566.85
Q1 2021	4,228	$2,000	$484.19	$438.57 - $555.83
Q4 2020	3,768	$1,820	$536.82	$468.18 - $616.55
Q3 2020	945	$529	$602.99	$537.02 - $660.97
Q2 2020	826	$515	$564.49	$473.82 - $642.77
Q1 2020	802	$392	$410.21	$326.32 - $515.14
Q4 2019	715	$268	$334.59	$270.76 - $380.14