PSYCHEMEDICS CORP

CUSIP: 744375205 Class: COM NEW

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

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

Q3 2024
Shares 21,060 Value ($000) $49 Avg Close — Range —
Q2 2024
Shares 22,688 Value ($000) $55 Avg Close — Range —
Q1 2024
Shares 36,117 Value ($000) $106 Avg Close — Range —
Q4 2023
Shares 36,117 Value ($000) $107 Avg Close — Range —
Q3 2023
Shares 38,184 Value ($000) $152 Avg Close — Range —
Q2 2023
Shares 56,155 Value ($000) $256 Avg Close — Range —
Q1 2023
Shares 56,562 Value ($000) $297 Avg Close — Range —
Q4 2022
Shares 58,916 Value ($000) $0 Avg Close — Range —
Q3 2022
Shares 58,726 Value ($000) $379 Avg Close — Range —
Q2 2022
Shares 59,829 Value ($000) $379 Avg Close — Range —
Q1 2022
Shares 60,307 Value ($000) $419 Avg Close — Range —
Q4 2021
Shares 62,658 Value ($000) $435 Avg Close — Range —
Q3 2021
Shares 76,181 Value ($000) $648 Avg Close — Range —
Q2 2021
Shares 114,623 Value ($000) $798 Avg Close — Range —
Q1 2021
Shares 107,200 Value ($000) $665 Avg Close — Range —
Q4 2020
Shares 115,461 Value ($000) $588 Avg Close — Range —
Q3 2020
Shares 122,612 Value ($000) $541 Avg Close — Range —
Q2 2020
Shares 146,021 Value ($000) $803 Avg Close — Range —
Q1 2020
Shares 146,021 Value ($000) $883 Avg Close — Range —
Q4 2019
Shares 148,283 Value ($000) $1,357 Avg Close — Range —
Q3 2019
Shares 140,853 Value ($000) $1,283 Avg Close — Range —
Q2 2019
Shares 139,353 Value ($000) $1,406 Avg Close — Range —
Q1 2019
Shares 133,137 Value ($000) $1,868 Avg Close — Range —
Q4 2018
Shares 131,537 Value ($000) $2,087 Avg Close — Range —
Q3 2018
Shares 132,070 Value ($000) $2,484 Avg Close — Range —
Q2 2018
Shares 130,555 Value ($000) $2,512 Avg Close — Range —
Q1 2018
Shares 129,952 Value ($000) $2,687 Avg Close — Range —
Q4 2017
Shares 124,429 Value ($000) $2,558 Avg Close — Range —
Q3 2017
Shares 119,779 Value ($000) $2,208 Avg Close — Range —
Q2 2017
Shares 105,523 Value ($000) $2,633 Avg Close — Range —
Q1 2017
Shares 92,445 Value ($000) $1,854 Avg Close — Range —
Q4 2016
Shares 79,585 Value ($000) $1,964 Avg Close — Range —
Q3 2016
Shares 60,012 Value ($000) $1,191 Avg Close — Range —
Q2 2016
Shares 50,906 Value ($000) $699 Avg Close — Range —
Q1 2016
Shares 48,329 Value ($000) $665 Avg Close — Range —
Q4 2015
Shares 47,519 Value ($000) $482 Avg Close — Range —
Q3 2015
Shares 47,519 Value ($000) $479 Avg Close — Range —
Q2 2015
Shares 46,719 Value ($000) $693 Avg Close — Range —
Q1 2015
Shares 44,739 Value ($000) $743 Avg Close — Range —
Q4 2014
Shares 44,739 Value ($000) $674 Avg Close — Range —
Q3 2014
Shares 45,104 Value ($000) $642 Avg Close — Range —
Q2 2014
Shares 45,104 Value ($000) $639 Avg Close — Range —
Q1 2014
Shares 45,504 Value ($000) $779 Avg Close — Range —
Q4 2013
Shares 45,504 Value ($000) $668 Avg Close — Range —
Q3 2013
Shares 47,404 Value ($000) $628 Avg Close — Range —
Q2 2013
Shares 49,754 Value ($000) $534 Avg Close — Range —