PSYCHEMEDICS CORP

CUSIP: 744375205 Class: COM NEW

GSA CAPITAL PARTNERS LLP's Holding History (CIK: 0001362033)

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

Q1 2017
Shares 10,700 Value ($000) $215 Avg Close — Range —
Q4 2016
Shares 8,700 Value ($000) $215 Avg Close — Range —