PSYCHEMEDICS CORP — SC 13G/A Filings
71 SC 13G/A filings on record
This page lists all SC 13G/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 71 SC 13G/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 13G/A | SC 13G/A | 0001104659-07-010113 | Feb 13, 2007 | — |
| SC 13G/A | PSYCHEMEDICS CORPORATION | 0001193125-06-126698 | Jun 8, 2006 | — |
| SC 13G/A | — | 0000919574-06-000531 | Feb 9, 2006 | — |
| SC 13G/A | AMENDMENT | 0001104659-06-004165 | Jan 27, 2006 | — |
| SC 13G/A | PSYCHEMEDICS CORPORATION | 0000950135-05-000748 | Feb 14, 2005 | — |
| SC 13G/A | SC 13G/A | 0001104659-05-006375 | Feb 14, 2005 | — |
| SC 13G/A | — | 0000919574-05-000308 | Feb 4, 2005 | — |
| SC 13G/A | PSYCHEMEDICS CORPORATION | 0000950135-04-000686 | Feb 12, 2004 | — |
| SC 13G/A | PSYCHEMEDICA CORPORATION | 0000950135-03-001129 | Feb 14, 2003 | — |
| SC 13G/A | — | 0000947766-02-000005 | Jan 24, 2002 | — |
| SC 13G/A | — | 0000947766-01-500010 | May 31, 2001 | — |
| SC 13G/A | PSYCHEMEDICS CORPORATION | 0000950135-01-000518 | Feb 13, 2001 | — |
| SC 13G/A | PSYCHEMEDICS CORPORATION 13G/A FILING | 0000947766-01-500007 | Jan 25, 2001 | — |
| SC 13G/A | — | 0000947766-00-000002 | Feb 14, 2000 | — |
| SC 13G/A | WERNER A. BAUMGARTNER | 0000950135-00-000647 | Feb 11, 2000 | — |
| SC 13G/A | PSYCHEMEDICS CORPORATION | 0000950135-99-000665 | Feb 12, 1999 | — |
| SC 13G/A | — | 0000947766-99-000006 | Feb 12, 1999 | — |
| SC 13G/A | — | 0000947766-99-000005 | Feb 12, 1999 | — |
| SC 13G/A | PSYCHEMEDICS CORPORATION | 0000950135-98-000997 | Feb 13, 1998 | — |
| SC 13G/A | WERNER A. BAUMGARTNER AMENDMENT NO 9 TO SC 13G | 0000950135-97-000650 | Feb 14, 1997 | — |
| SC 13G/A | PSYCHEMEDICS CORPORATION AMENDMENT NO. 8 | 0000950135-96-000968 | Feb 12, 1996 | — |