| SC 13G/A | 2023-02-14 | Minerva Advisors LLC | Williams Industrial Services Group Inc. | - | - | EDGAR |
| SC 13G/A | 2023-02-13 | Francis Capital Management, LLC | Williams Industrial Services Group Inc. | 0 | 0.0% | EDGAR |
| SC 13G/A | 2023-02-07 | Wax Asset Management, LLC | Williams Industrial Services Group Inc. | 624,501 | 2.4% | EDGAR |
| SC 13G/A | 2023-02-01 | Emancipation Management LLC | Williams Industrial Services Group Inc. | 2,321,404 | 8.8% | EDGAR |
| SC 13G/A | 2022-02-14 | Francis Capital Management, LLC | Williams Industrial Services Group Inc. | 1,807,200 | 7.0% | EDGAR |
| SC 13G/A | 2022-02-14 | Minerva Advisors LLC | Williams Industrial Services Group Inc. | - | - | EDGAR |
| SC 13G/A | 2022-01-31 | Wax Asset Management, LLC | Williams Industrial Services Group Inc. | 2,085,970 | 8.0% | EDGAR |
| SC 13G/A | 2022-01-27 | Emancipation Management LLC | Williams Industrial Services Group Inc. | 2,368,892 | 9.1% | EDGAR |
| SC 13G/A | 2021-02-16 | Francis Capital Management, LLC | Williams Industrial Services Group Inc. | 1,610,000 | 6.4% | EDGAR |
| SC 13G/A | 2021-02-12 | Wax Asset Management, LLC | Williams Industrial Services Group Inc. | 2,836,954 | 11.2% | EDGAR |
| SC 13G/A | 2021-02-11 | GENDELL JEFFREY L | Williams Industrial Services Group Inc. | 0 | 0.0% | EDGAR |
| SC 13G/A | 2021-02-09 | Minerva Advisors LLC | Williams Industrial Services Group Inc. | - | - | EDGAR |
| SC 13G/A | 2021-01-07 | Emancipation Management LLC | Williams Industrial Services Group Inc. | 2,448,498 | 9.7% | EDGAR |
| SC 13G | 2020-12-23 | Francis Capital Management, LLC | Williams Industrial Services Group Inc. | 1,299,947 | 5.1% | EDGAR |
| SC 13D/A | 2020-08-31 | WYNNEFIELD PARTNERS SMALL CAP VALUE LP | Williams Industrial Services Group Inc. | 2,085,997 | 8.2% | EDGAR |
| SC 13G | 2020-04-01 | Minerva Advisors LLC | Williams Industrial Services Group Inc. | - | - | EDGAR |
| SC 13D/A | 2020-03-12 | WYNNEFIELD PARTNERS SMALL CAP VALUE LP | Williams Industrial Services Group Inc. | 1,859,983 | 7.6% | EDGAR |
| SC 13G/A | 2020-02-13 | GENDELL JEFFREY L ET AL | Williams Industrial Services Group Inc. | 1,506,171 | 7.9% | EDGAR |
| SC 13G/A | 2020-02-11 | Wax Asset Management, LLC | Williams Industrial Services Group Inc. | 2,462,230 | 12.9% | EDGAR |
| SC 13G/A | 2020-02-07 | Emancipation Management LLC | Williams Industrial Services Group Inc. | 3,008,576 | 15.8% | EDGAR |