ROCK CREEK PHARMACEUTICALS I

CUSIP: 772081105 Class: COM

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

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

Q1 2015
Shares 129,407 Value ($000) $13 Avg Close — Range —
Q4 2014
Shares 145,974 Value ($000) $27 Avg Close — Range —
Q3 2014
Shares 70,165 Value ($000) $20 Avg Close — Range —