PROQR THRAPEUTICS N V

Ticker: PRQR CUSIP: N71542109 Class: SHS EURO

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

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

Q3 2015

Shares 209,398 Value ($000) $3,051 Avg Close $16.75 Range $12.99 - $20.05

Q2 2015

Shares 209,398 Value ($000) $3,491 Avg Close $18.84 Range $15.74 - $22.97

Q1 2015

Shares 209,398 Value ($000) $4,582 Avg Close $20.65 Range $15.80 - $27.60

Q4 2014

Shares 380,000 Value ($000) $8,235 Avg Close $15.18 Range $11.00 - $23.02

Q3 2014

Shares 530,000 Value ($000) $9,111 Avg Close $16.02 Range $14.12 - $21.87

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2015	209,398	$3,051	$16.75	$12.99 - $20.05
Q2 2015	209,398	$3,491	$18.84	$15.74 - $22.97
Q1 2015	209,398	$4,582	$20.65	$15.80 - $27.60
Q4 2014	380,000	$8,235	$15.18	$11.00 - $23.02
Q3 2014	530,000	$9,111	$16.02	$14.12 - $21.87