PROQR THRAPEUTICS N V

Ticker: PRQR CUSIP: N71542109 Class: SHS EURO

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

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

Q4 2015

Shares 581,668 Value ($000) $5,049 Avg Close $11.50 Range $6.95 - $16.23

Q3 2015

Shares 576,632 Value ($000) $8,402 Avg Close $16.75 Range $12.99 - $20.05

Q2 2015

Shares 595,307 Value ($000) $9,924 Avg Close $18.84 Range $15.74 - $22.97

Q1 2015

Shares 408,408 Value ($000) $8,936 Avg Close $20.65 Range $15.80 - $27.60

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2015	581,668	$5,049	$11.50	$6.95 - $16.23
Q3 2015	576,632	$8,402	$16.75	$12.99 - $20.05
Q2 2015	595,307	$9,924	$18.84	$15.74 - $22.97
Q1 2015	408,408	$8,936	$20.65	$15.80 - $27.60