DOCUMENT SEC SYS INC

CUSIP: 25614T101 Class: CMN

Tower Research Capital LLC (TRC)'s Holding History (CIK: 0001533421)

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

Q4 2015
Shares 16,484 Value ($000) $3 Avg Close — Range —
Q3 2015
Shares 91 Value ($000) $0 Avg Close — Range —
Q2 2015
Shares 103 Value ($000) $0 Avg Close — Range —
Q1 2015
Shares 118 Value ($000) $0 Avg Close — Range —
Q4 2014
Shares 427 Value ($000) $0 Avg Close — Range —
Q3 2014
Shares 2,658 Value ($000) $2 Avg Close — Range —
Q2 2014
Shares 2,319 Value ($000) $4 Avg Close — Range —
Q1 2014
Shares 2,368 Value ($000) $3 Avg Close — Range —
Q4 2013
Shares 262 Value ($000) $1 Avg Close — Range —
Q3 2013
Shares 4 Value ($000) $0 Avg Close — Range —
Q2 2013
Shares 354 Value ($000) $1 Avg Close — Range —