REGENERON PHARMACEUTICALS

Ticker: REGN CUSIP: 75886F107 Class: COM

VIKING GLOBAL INVESTORS LP's Holding History (CIK: 0001103804)

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

Q1 2025

Shares 97,739 Value ($000) $61,989 Avg Close $684.44 Range $615.89 - $745.12

Q3 2024

Shares 49,870 Value ($000) $52,425 Avg Close $1106.73 Range $1002.85 - $1204.52

Q3 2014

Shares 1,080,682 Value ($000) $389,607 Avg Close $333.32 Range $283.49 - $367.27

Q2 2014

Shares 2,963,456 Value ($000) $837,087 Avg Close $294.74 Range $268.01 - $318.24

Q1 2014

Shares 1,051,800 Value ($000) $315,835 Avg Close $306.39 Range $261.52 - $350.55

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2025	97,739	$61,989	$684.44	$615.89 - $745.12
Q3 2024	49,870	$52,425	$1106.73	$1002.85 - $1204.52
Q3 2014	1,080,682	$389,607	$333.32	$283.49 - $367.27
Q2 2014	2,963,456	$837,087	$294.74	$268.01 - $318.24
Q1 2014	1,051,800	$315,835	$306.39	$261.52 - $350.55