PROSENSA HLDG N V

CUSIP: N71546100 Class: COM

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q4 2014
Shares 50,700 Value ($000) $951 Avg Close — Range —
Q3 2014
Shares 19,073 Value ($000) $161 Avg Close — Range —
Q2 2014
Shares 2,871 Value ($000) $36 Avg Close — Range —
Q1 2014
Shares 6,027 Value ($000) $34 Avg Close — Range —
Q4 2013
Shares 19,892 Value ($000) $93 Avg Close — Range —
Q3 2013
Shares 7,785 Value ($000) $51 Avg Close — Range —