CEMPRA INC

CUSIP: 15130J109 Class: COM

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

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

Q3 2017
Shares 15,671 Value ($000) $51 Avg Close — Range —
Q2 2017
Shares 21,875 Value ($000) $101 Avg Close — Range —
Q1 2017
Shares 37,700 Value ($000) $141 Avg Close — Range —
Q4 2016
Shares 49,805 Value ($000) $139 Avg Close — Range —
Q1 2016
Shares 16,998 Value ($000) $298 Avg Close — Range —
Q3 2015
Shares 11,781 Value ($000) $328 Avg Close — Range —
Q2 2015
Shares 29,821 Value ($000) $1,025 Avg Close — Range —
Q1 2015
Shares 13,364 Value ($000) $459 Avg Close — Range —
Q3 2014
Shares 4,800 Value ($000) $53 Avg Close — Range —