DOCUMENT SEC SYS INC

CUSIP: 25614T309 Class: COM NEW

NORTHERN TRUST CORP's Holding History (CIK: 0000073124)

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

Q3 2021
Shares 97,995 Value ($000) $126 Avg Close — Range —
Q2 2021
Shares 48,966 Value ($000) $88 Avg Close — Range —
Q1 2021
Shares 48,966 Value ($000) $177 Avg Close — Range —