RESEARCH FRONTIERS INC — SC 13G/A Filings
7 SC 13G/A filings on record
This page lists all SC 13G/A filings submitted to the SEC by RESEARCH FRONTIERS INC (REFR), sorted by most recent first. Each row links to the full filing on EdgarLookup. RESEARCH FRONTIERS INC has filed 7 SC 13G/A documents with the SEC since 1995. To view all SEC filings by RESEARCH FRONTIERS INC, see the full filings list.
All
10-K
10-K/A
10-K405
10-Q
10-Q/A
3
3/A
4
4/A
424B2
424B3
424B5
8-A12G
8-A12G/A
8-K
8-K/A
CORRESP
CT ORDER
D
DEF 14A
DEFA14A
EFFECT
PRE 14A
S-3
S-3/A
S-8
SC 13D
SC 13G
SC 13G/A
SCHEDULE 13G
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SC 13G/A | — | 0000834237-21-008738 | Jul 12, 2021 | — |
| SC 13G/A | AMENDMENT NO. 6 TO SCHEDULE 13G | 0001193125-21-081384 | Mar 15, 2021 | — |
| SC 13G/A | AMENDMENT NO. 5 TO SCHEDULE 13G | 0001193125-21-015836 | Jan 25, 2021 | — |
| SC 13G/A | AMENDMENT NO 4 TO SC 13G | 0001193125-20-233036 | Aug 27, 2020 | — |
| SC 13G/A | SC 13G/A | 0001193125-19-028264 | Feb 5, 2019 | — |
| SC 13G/A | SC 13G/A | 0001193125-15-048835 | Feb 13, 2015 | — |
| SC 13G/A | SC 13G/A | 0001193125-13-060172 | Feb 14, 2013 | — |