SIGMA LABS INC

CUSIP: 826598302 Class: COM PAR

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

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

Q4 2019
Shares 12,543 Value ($000) $12 Avg Close — Range —
Q3 2019
Shares 12,543 Value ($000) $8 Avg Close — Range —
Q2 2019
Shares 12,543 Value ($000) $18 Avg Close — Range —
Q1 2019
Shares 12,543 Value ($000) $21 Avg Close — Range —