REGENERON PHARMACEUTICALS

Ticker: REGN CUSIP: 75886F107 Class: COM

DEERFIELD MANAGEMENT COMPANY, L.P.'s Holding History (CIK: 0001009258)

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

Q3 2016

Shares 3,300 Value ($000) $1,327 Avg Close $398.92 Range $346.51 - $441.54

Q1 2014

Shares 4,799 Value ($000) $1,441 Avg Close $306.39 Range $261.52 - $350.55

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2016	3,300	$1,327	$398.92	$346.51 - $441.54
Q1 2014	4,799	$1,441	$306.39	$261.52 - $350.55