PSYCHEMEDICS CORP — 4/A Filings
4 4/A filings on record
This page lists all 4/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 4 4/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 |
|---|---|---|---|---|
| 4/A | — | 0001171520-22-000218 | Mar 31, 2022 | Mar 30, 2022 |
| 4/A | PRIMARY DOCUMENT | 0001739481-18-000020 | May 10, 2018 | Apr 30, 2018 |
| 4/A | PRIMARY DOCUMENT | 0001041889-16-000032 | Feb 23, 2016 | Feb 19, 2016 |
| 4/A | PRIMARY DOCUMENT | 0001250729-04-000004 | Feb 13, 2004 | Jan 7, 2004 |