| Form type | Sec Links | Description | Filing date | Reporting date |
|---|---|---|---|---|
| SC 13G | Report | Feb 14, 2024 | ||
| SC 13G | Report | SCHEDULE 13G | Feb 13, 2024 | |
| SC 13G/A | Report | SC 13G/A | Feb 9, 2024 | |
| SC 13G | Report | Feb 9, 2024 | ||
| SC 13G/A | Report | Jan 25, 2024 | ||
| SC 13G | Report | SC 13G | Feb 10, 2023 | |
| SC 13G | Report | Jan 25, 2023 | ||
| SC 13G/A | Report | SC 13G/A | Feb 10, 2022 | |
| SC 13G/A | Report | Feb 3, 2022 | ||
| SC 13G | Report | Dec 9, 2021 | ||
| SC 13G/A | Report | Oct 29, 2021 | ||
| SC 13G/A | Report | SC 13G/A | May 17, 2021 | |
| SC 13G/A | Report | SC 13G/A | Feb 11, 2021 | |
| SC 13G | Report | Feb 2, 2021 | ||
| SC 13G/A | Report | SC 13G/A | Aug 4, 2020 | |
| SC 13G/A | Report | Jun 9, 2020 | ||
| SC 13G/A | Report | SC 13G/A | Feb 12, 2020 | |
| SC 13G | Report | Feb 7, 2020 | ||
| SC 13G | Report | SC 13G | Feb 14, 2019 | |
| SC 13G/A | Report | SC 13GA | Feb 16, 2018 | |
| SC 13G/A | Report | Feb 12, 2018 | ||
| SC 13G | Report | Feb 9, 2017 | ||
| SC 13G | Report | SUNDT AS SC 13G 2-16-2016 (ENERGY RECOVERY, INC.) | Feb 24, 2016 | |
| SC 13G/A | Report | ERII AS OF 12/31/2015 | Feb 9, 2016 | |
| SC 13G | Report | ERII AS OF 12/31/2014 | Feb 10, 2015 | |
| SC 13G/A | Report | Jul 10, 2014 | ||
| SC 13G/A | Report | Feb 14, 2014 | ||
| SC 13G/A | Report | Jan 29, 2014 | ||
| SC 13G/A | Report | Dec 16, 2013 | ||
| SC 13G/A | Report | Feb 14, 2013 | ||
| SC 13G | Report | Feb 14, 2013 | ||
| SC 13G/A | Report | Feb 8, 2013 | ||
| SC 13G/A | Report | ENERGY RECOVERY INC. | Jan 31, 2013 | |
| SC 13G/A | Report | Feb 14, 2012 | ||
| SC 13G | Report | ENERGY RECOVERY INC. 12312011 | Feb 13, 2012 | |
| SC 13G | Report | Feb 9, 2012 | ||
| SC 13G/A | Report | Feb 14, 2011 | ||
| SC 13G | Report | SCHEDULE 13G | May 7, 2010 | |
| SC 13G | Report | Mar 26, 2010 | ||
| SC 13G/A | Report | Mar 19, 2010 | ||
| SC 13G/A | Report | Mar 18, 2010 | ||
| SC 13G/A | Report | SC 13G/A | Feb 24, 2010 |