PSYCHEMEDICS CORP — SC 13D/A Filings
10 SC 13D/A filings on record
This page lists all SC 13D/A filings submitted to the SEC by PSYCHEMEDICS CORP (PMDI), sorted by most recent first. Each row links to the full filing on EdgarLookup. PSYCHEMEDICS CORP has filed 10 SC 13D/A documents with the SEC since 1995. To view all SEC filings by PSYCHEMEDICS CORP, see the full filings list.
All
10-K
10-K/A
10-K405
10-Q
10-Q/A
10KSB
10KSB/A
10QSB
144
15-12G
25
3
4
4/A
424B3
5
8-A12B
8-A12B/A
8-K
8-K/A
ARS
CERTAMX
CERTNAS
CORRESP
DEF 14A
DEFA14A
DEFR14A
EFFECT
NT 10-Q
POS AM
PRE 14A
PRER14A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13E3
SC 13E3/A
SC 13G
SC 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SC 13D/A | — | 0001171520-24-000386 | Dec 12, 2024 | — |
| SC 13D/A | — | 0001171520-24-000373 | Dec 5, 2024 | — |
| SC 13D/A | — | 0001171520-24-000290 | Aug 13, 2024 | — |
| SC 13D/A | — | 0000921895-22-001950 | Jun 10, 2022 | — |
| SC 13D/A | AMENDMENT NO. 5 TO THE SCHEDULE 13D | 0000921895-22-001553 | May 10, 2022 | — |
| SC 13D/A | AMENDMENT NO. 4 TO THE SCHEDULE 13D | 0000921895-22-001328 | Apr 21, 2022 | — |
| SC 13D/A | AMENDMENT NO. 3 TO THE SCHEDULE 13D | 0000921895-22-000243 | Jan 26, 2022 | — |
| SC 13D/A | AMENDMENT NO. 2 TO THE SCHEDULE 13D | 0000921895-21-002309 | Sep 23, 2021 | — |
| SC 13D/A | AMENDMENT NO. 1 TO THE SCHEDULE 13D | 0000921895-21-002154 | Aug 19, 2021 | — |
| SC 13D/A | DONALD F. FLYNN RE: PSYCHEMEDICS CORPORATION | 0000950135-04-002357 | May 5, 2004 | — |