PSYCHEMEDICS CORP

CUSIP: 744375205 Class: COM NEW

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

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

Q1 2019
Shares 279,896 Value ($000) $3,927 Avg Close — Range —
Q4 2018
Shares 213,339 Value ($000) $3,386 Avg Close — Range —
Q3 2018
Shares 201,292 Value ($000) $3,786 Avg Close — Range —