REGENERON PHARMACEUTICALS

Ticker: REGN CUSIP: 75886F107 Class: COM

SOUTHEASTERN ASSET MANAGEMENT INC/TN/'s Holding History (CIK: 0000807985)

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

Q4 2025

Shares 165,792 Value ($000) $127,970 Avg Close $678.68 Range $540.32 - $792.77

Q3 2025

Shares 144,607 Value ($000) $81,308 Avg Close $564.28 Range $519.56 - $609.69

Q2 2025

Shares 160,581 Value ($000) $84,305 Avg Close $556.12 Range $475.17 - $638.52

Q1 2025

Shares 114,880 Value ($000) $72,860 Avg Close $684.44 Range $615.89 - $745.12

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	165,792	$127,970	$678.68	$540.32 - $792.77
Q3 2025	144,607	$81,308	$564.28	$519.56 - $609.69
Q2 2025	160,581	$84,305	$556.12	$475.17 - $638.52
Q1 2025	114,880	$72,860	$684.44	$615.89 - $745.12