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 | 0001104659-24-126432 | Dec 6, 2024 | — |
| SC 13G/A | — | 0001037389-24-000016 | Feb 13, 2024 | — |
| SC 13G/A | SC 13G/A | 0001171843-24-000556 | Feb 2, 2024 | — |
| SC 13G/A | FORM SC 13G/A | 0001171843-23-000966 | Feb 14, 2023 | — |
| SC 13G/A | — | 0001037389-23-000039 | Feb 13, 2023 | — |
| SC 13G/A | SC 13G/A | 0001171843-22-001016 | Feb 14, 2022 | — |
| SC 13G/A | — | 0001398344-22-003024 | Feb 14, 2022 | — |
| SC 13G/A | — | 0001037389-22-000172 | Feb 11, 2022 | — |
| SC 13G/A | AMENDED 13G FOR PSYCHEMEDICS CORPORATION | 0000884589-21-000019 | Feb 16, 2021 | — |
| SC 13G/A | — | 0001398344-21-003114 | Feb 12, 2021 | — |
| SC 13G/A | — | 0001037389-21-000270 | Feb 11, 2021 | — |
| SC 13G/A | TIETON CAPITAL MANAGEMENT 13G/A | 0001381954-20-000005 | Mar 3, 2020 | — |
| SC 13G/A | — | 0001398344-20-003541 | Feb 14, 2020 | — |
| SC 13G/A | AMENDED 13G FOR PSYCHEMEDICS CORPORATION | 0000884589-20-000018 | Feb 14, 2020 | — |
| SC 13G/A | — | 0001037389-20-000244 | Feb 13, 2020 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001172661-20-000294 | Feb 3, 2020 | — |
| SC 13G/A | — | 0001037389-19-000222 | Feb 13, 2019 | — |
| SC 13G/A | — | 0001037389-18-000148 | Feb 14, 2018 | — |
| SC 13G/A | TIETON CAPITAL MANAGEMENT 13G/A | 0001381954-17-000006 | Jun 1, 2017 | — |
| SC 13G/A | 13G/A | 0001037389-17-000130 | Feb 14, 2017 | — |
| SC 13G/A | TIETON CAPITAL MANAGEMENT 13G/A | 0001381954-17-000003 | Jan 24, 2017 | — |
| SC 13G/A | AMENDED 13G FOR 12/31/15 PMD | 0000884589-16-000021 | Feb 12, 2016 | — |
| SC 13G/A | PSYCHEMEDICS CORPORATION | 0001037389-16-000130 | Feb 11, 2016 | — |
| SC 13G/A | TIETON CAPITAL MANAGEMENT 13G/A | 0001381954-16-000014 | Jan 12, 2016 | — |
| SC 13G/A | AMENDED 13G FOR PSYCHEMEDICS CORP | 0000884589-15-000002 | Feb 13, 2015 | — |
| SC 13G/A | — | 0001037389-15-000065 | Feb 12, 2015 | — |
| SC 13G/A | SCHEDULE 13G HOLDINGS REPORT AMENDMENT | 0001172661-15-000264 | Feb 6, 2015 | — |
| SC 13G/A | — | 0001037389-14-000029 | Feb 13, 2014 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT FILINGS | 0001172661-14-000383 | Feb 13, 2014 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT FILINGS | 0001172661-14-000120 | Jan 10, 2014 | — |
| SC 13G/A | SCHEDULE 13G HOLDINGS REPORT AMENDMENT | 0001172661-13-000351 | Feb 13, 2013 | — |
| SC 13G/A | 2012 13G | 0001037389-13-000039 | Feb 12, 2013 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT FILING | 0001172661-12-001002 | Oct 9, 2012 | — |
| SC 13G/A | SC 13G/A | 0001193125-12-265325 | Jun 8, 2012 | — |
| SC 13G/A | SCHEDULE 13G HOLDINGS REPORT AMENDMENT | 0001172661-12-000326 | Feb 15, 2012 | — |
| SC 13G/A | 13G/A | 0001037389-12-000040 | Feb 13, 2012 | — |
| SC 13G/A | PMD 13GA 073111 | 0001325312-11-000029 | Aug 10, 2011 | — |
| SC 13G/A | SCHEDULE 13G HOLDINGS REPORT AMENDMENT | 0001172661-11-000494 | Aug 10, 2011 | — |
| SC 13G/A | — | 0000906304-11-000406 | Aug 2, 2011 | — |
| SC 13G/A | SCHEDULE 13G HOLDINGS REPORT AMENDMENT | 0001172661-11-000108 | Feb 11, 2011 | — |
| SC 13G/A | 13G AMENDMENT | 0001037389-11-000073 | Feb 11, 2011 | — |
| SC 13G/A | — | 0000906304-11-000202 | Jan 20, 2011 | — |
| SC 13G/A | 13G/A | 0001037389-10-000254 | Feb 12, 2010 | — |
| SC 13G/A | SC 13G/A | 0001104659-09-037559 | Jun 10, 2009 | — |
| SC 13G/A | SC 13G/A | 0001104659-09-009759 | Feb 17, 2009 | — |
| SC 13G/A | SC 13G/A | 0001104659-09-009420 | Feb 13, 2009 | — |
| SC 13G/A | — | 0001037389-09-000330 | Feb 13, 2009 | — |
| SC 13G/A | SC 13G/A | 0001104659-08-010644 | Feb 14, 2008 | — |
| SC 13G/A | PSYCHEMEDICS CORP. 13G/A | 0001072613-08-000449 | Feb 14, 2008 | — |
| SC 13G/A | PSYCHMEDICS CORPORATION SCHEDULE 13G/A | 0001072613-07-000365 | Feb 13, 2007 | — |