PRECISION THERAPEUTICS INC

CUSIP: 74033P100 Class: COM

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

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

Q1 2019
Shares 17,988 Value ($000) $13 Avg Close — Range —
Q4 2018
Shares 17,988 Value ($000) $11 Avg Close — Range —
Q3 2018
Shares 17,988 Value ($000) $19 Avg Close — Range —
Q2 2018
Shares 17,988 Value ($000) $20 Avg Close — Range —
Q1 2018
Shares 17,988 Value ($000) $20 Avg Close — Range —