REGENERON PHARMACEUTICALS

Ticker: REGN CUSIP: 75886F107 Class: COM

PARNASSUS INVESTMENTS, LLC's Holding History (CIK: 0000948669)

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

Q4 2025

Shares 96,545 Value ($000) $74,520 Avg Close $678.68 Range $540.32 - $792.77

Q3 2025

Shares 101,023 Value ($000) $56,802 Avg Close $564.28 Range $519.56 - $609.69

Q2 2025

Shares 101,084 Value ($000) $53,069 Avg Close $556.12 Range $475.17 - $638.52

Q4 2019

Shares 145,000 Value ($000) $54,445 Avg Close $334.59 Range $270.76 - $380.14

Q3 2019

Shares 625,000 Value ($000) $173,375 Avg Close $294.28 Range $269.87 - $318.99

Q2 2019

Shares 625,000 Value ($000) $195,625 Avg Close $331.08 Range $293.64 - $413.60

Q1 2019

Shares 160,000 Value ($000) $65,699 Avg Close $409.51 Range $363.99 - $439.56

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	96,545	$74,520	$678.68	$540.32 - $792.77
Q3 2025	101,023	$56,802	$564.28	$519.56 - $609.69
Q2 2025	101,084	$53,069	$556.12	$475.17 - $638.52
Q4 2019	145,000	$54,445	$334.59	$270.76 - $380.14
Q3 2019	625,000	$173,375	$294.28	$269.87 - $318.99
Q2 2019	625,000	$195,625	$331.08	$293.64 - $413.60
Q1 2019	160,000	$65,699	$409.51	$363.99 - $439.56