DOCUMENT SEC SYS INC

CUSIP: 25614T200 Class: COM NEW

CenterStar Asset Management, LLC's Holding History (CIK: 0001722053)

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

Q1 2018
Shares 1,992 Value ($000) $2 Avg Close — Range —
Q4 2017
Shares 8,043 Value ($000) $16 Avg Close — Range —