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NORTHERN TRUST CORP
> PMD
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | PSYCHEMEDICS CORP | PMD | 18,617 | 490 | 84,894,000 | -10,273,000 | $4,560.03 |
| 03/31/2023 | PSYCHEMEDICS CORP | PMD | 18,127 | 891 | 95,167,000 | 95,056,000 | $5,250.01 |
| 09/30/2022 | PSYCHEMEDICS CORP | PMD | 17,236 | -110 | 111,000 | 1,000 | $6.44 |
| 06/30/2022 | PSYCHEMEDICS CORP | PMD | 17,346 | -1,410 | 110,000 | -19,000 | $6.34 |
| 03/31/2022 | PSYCHEMEDICS CORP | PMD | 18,756 | -369 | 129,000 | -5,000 | $6.88 |
| 12/31/2021 | PSYCHEMEDICS CORP | PMD | 19,125 | -563 | 134,000 | -31,000 | $7.01 |
| 09/30/2021 | PSYCHEMEDICS CORP | PMD | 19,688 | 41 | 165,000 | 28,000 | $8.38 |
| 06/30/2021 | PSYCHEMEDICS CORP | PMD | 19,647 | -4,110 | 137,000 | 16,000 | $6.97 |
| 12/31/2020 | PSYCHEMEDICS CORP | PMD | 23,757 | -3,657 | 121,000 | 0 | $5.09 |
| 09/30/2020 | PSYCHEMEDICS CORP | PMD | 27,414 | 228 | 121,000 | -43,000 | $4.41 |
| 03/31/2020 | PSYCHEMEDICS CORP | PMD | 27,186 | 418 | 164,000 | -81,000 | $6.03 |
| 12/31/2019 | PSYCHEMEDICS CORP | PMD | 26,768 | -536 | 245,000 | -3,000 | $9.15 |
| 09/30/2019 | PSYCHEMEDICS CORP | PMD | 27,304 | -1,518 | 248,000 | -42,000 | $9.08 |
| 06/30/2019 | PSYCHEMEDICS CORP | PMD | 28,822 | -7,551 | 290,000 | -220,000 | $10.06 |
| 03/31/2019 | PSYCHEMEDICS CORP | PMD | 36,373 | -7,241 | 510,000 | -182,000 | $14.02 |
| 12/31/2018 | PSYCHEMEDICS CORP | PMD | 43,614 | -1,215 | 692,000 | -151,000 | $15.87 |
| 09/30/2018 | PSYCHEMEDICS CORP | PMD | 44,829 | 5,783 | 843,000 | 92,000 | $18.80 |
| 06/30/2018 | PSYCHEMEDICS CORP | PMD | 39,046 | -200 | 751,000 | -87,000 | $19.23 |
| 03/31/2018 | PSYCHEMEDICS CORP | PMD | 39,246 | -375 | 838,000 | 23,000 | $21.35 |
| 12/31/2017 | PSYCHEMEDICS CORP | PMD | 39,621 | 2,694 | 815,000 | 134,000 | $20.57 |
| 09/30/2017 | PSYCHEMEDICS CORP | PMD | 36,927 | -1,300 | 681,000 | -272,000 | $18.44 |
| 06/30/2017 | PSYCHEMEDICS CORP | PMD | 38,227 | 18,778 | 953,000 | 564,000 | $24.93 |
| 03/31/2017 | PSYCHEMEDICS CORP | PMD | 19,449 | 19,449 | 389,000 | 389,000 | $20.00 |
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