PSYCHEMEDICS CORP - PMDI
Detailed investor-level table based on 13F positions.
Early Q4 2025 data: only 1 institutional holders reported so far. The full shareholder list will grow as more funds file with the SEC.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC | History | Added to | 270,863 | 625 | 0.0% | 0.0% | 1 | +13,900 | 5.41% | Q3 2024 | Nov 13, 2024 |
| VANGUARD GROUP INC | History | No change | 251,283 | 580 | 0.0% | 0.0% | 2 | 0 | 0.0% | Q3 2024 | Nov 13, 2024 |
| BlackRock, Inc. | History | New | 66,408 | 153 | 0.0% | — | 3 | +66,408 | New | Q3 2024 | Nov 13, 2024 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Added to | 47,391 | 109 | 0.0% | 0.0% | 4 | +35,854 | 310.77% | Q3 2024 | Nov 14, 2024 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 42,679 | 98 | 0.0% | 0.0% | 5 | +5,474 | 14.71% | Q3 2024 | Nov 12, 2024 |
| CITADEL ADVISORS LLC | History | Added to | 21,509 | 49 | 0.0% | 0.0% | 6 | +8,869 | 70.17% | Q3 2024 | Nov 14, 2024 |
| DIMENSIONAL FUND ADVISORS LP | History | Reduced | 21,060 | 48 | 0.0% | 0.0% | 7 | -1,628 | -7.18% | Q3 2024 | Nov 07, 2024 |
| NORTHERN TRUST CORP | History | Added to | 18,910 | 43 | 0.0% | 0.0% | 8 | +3,674 | 24.11% | Q3 2024 | Nov 13, 2024 |
| MORGAN STANLEY | History | No change | 3,001 | 6 | 0.0% | 0.0% | 9 | 0 | 0.0% | Q3 2024 | May 14, 2025 |
| Tower Research Capital LLC (TRC) | History | Reduced | 1,977 | 4 | 0.0% | 0.0% | 10 | -1,590 | -44.58% | Q3 2024 | Nov 14, 2024 |
| Provenance Wealth Advisors, LLC | History | No change | 772 | 1 | 0.0% | 0.0% | 11 | 0 | 0.0% | Q3 2024 | Aug 15, 2025 |
| CRAWFORD INVESTMENT COUNSEL INC | History | Closed out | 0 | 0 | — | 0.0% | — | -10,018 | -100.0% | Q2 2024 | Aug 14, 2024 |
| FMR LLC | History | Reduced | 100 | 0 | — | 0.0% | — | -640 | -86.49% | Q3 2024 | Nov 13, 2024 |
| ROYAL BANK OF CANADA | History | Closed out | 0 | 0 | — | — | — | -50 | -100.0% | Q2 2024 | Nov 06, 2024 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | History | Closed out | 0 | 0 | — | — | — | -15 | -100.0% | Q2 2024 | Aug 16, 2024 |
| BANK OF AMERICA CORP /DE/ | History | Added to | 51 | 0 | — | — | — | +12 | 30.77% | Q3 2024 | Mar 18, 2025 |
| JPMORGAN CHASE & CO | History | Reduced | 11 | 0 | — | — | — | -1 | -8.33% | Q3 2024 | Dec 26, 2024 |
| WELLS FARGO & COMPANY/MN | History | No change | 1 | 0 | — | — | — | 0 | 0.0% | Q3 2024 | Nov 13, 2024 |
| OSAIC HOLDINGS, INC. | History | No change | 257 | 0 | — | — | — | 0 | 0.0% | Q3 2024 | Nov 13, 2024 |