GIGAMON INC

CUSIP: 37518B102 Class: COM

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

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

Q1 2017
Shares 19,608 Value ($000) $697 Avg Close — Range —
Q4 2016
Shares 897 Value ($000) $41 Avg Close — Range —
Q3 2016
Shares 174 Value ($000) $10 Avg Close — Range —
Q4 2015
Shares 1,559 Value ($000) $41 Avg Close — Range —
Q2 2015
Shares 8,711 Value ($000) $287 Avg Close — Range —
Q1 2015
Shares 817 Value ($000) $17 Avg Close — Range —
Q4 2014
Shares 1,649 Value ($000) $29 Avg Close — Range —
Q3 2014
Shares 88,471 Value ($000) $926 Avg Close — Range —
Q2 2014
Shares 44,506 Value ($000) $852 Avg Close — Range —
Q4 2013
Shares 1,680 Value ($000) $47 Avg Close — Range —
Q3 2013
Shares 5,896 Value ($000) $228 Avg Close — Range —