REGENERON PHARMACEUTICALS

Ticker: REGN CUSIP: 75886F107 Class: COM

Rossby Financial, LCC's Holding History (CIK: 0002056510)

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

Q4 2025

Shares 64 Value ($000) $49 Avg Close $678.68 Range $540.32 - $792.77

Q3 2025

Shares 56 Value ($000) $34 Avg Close $564.28 Range $519.56 - $609.69

Q2 2025

Shares 180 Value ($000) $95 Avg Close $556.12 Range $475.17 - $638.52

Q1 2025

Shares 144 Value ($000) $87 Avg Close $684.44 Range $615.89 - $745.12

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	64	$49	$678.68	$540.32 - $792.77
Q3 2025	56	$34	$564.28	$519.56 - $609.69
Q2 2025	180	$95	$556.12	$475.17 - $638.52
Q1 2025	144	$87	$684.44	$615.89 - $745.12