| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2023-10-10 | AWM Investment Company, Inc. | SIGMA ADDITIVE SOLUTIONS, INC. | 19,999 | 3.3% | EDGAR |
| SC 13G | 2022-02-11 | AWM Investment Company, Inc. | SIGMA LABS, INC. | 3,761,840 | 5.7% | EDGAR |
| SC 13G | 2022-02-11 | AWM Investment Company, Inc. | SIGMA LABS, INC. | 697,785 | 10.0% | EDGAR |
| SC 13G/A | 2021-02-11 | Schwartz Carl I. | SIGMA LABS, INC. | 328,156 | 5.5% | EDGAR |
| SC 13G/A | 2020-02-14 | Schwartz Carl I. | SIGMA LABS, INC. | 2,400,000 | 17.1% | EDGAR |
| SC 13G/A | 2019-02-13 | Schwartz Carl I. | SIGMA LABS, INC. | 1,500,000 | 17.2% | EDGAR |
| SC 13G/A | 2018-08-09 | Schwartz Carl I. | SIGMA LABS, INC. | 1,000,000 | 12.1% | EDGAR |
| SC 13G | 2018-07-31 | Schwartz Carl I. | SIGMA LABS, INC. | 800,000 | 9.7% | EDGAR |
| SC 13G/A | 2018-02-09 | CVI Investments, Inc. | SIGMA LABS, INC. | 215,500 | 4.4% | EDGAR |
| SC 13G/A | 2018-01-08 | SABBY MANAGEMENT, LLC | SIGMA LABS, INC. | 154,264 | 3.3% | EDGAR |
| SC 13G | 2017-02-24 | CVI Investments, Inc. | SIGMA LABS, INC. | 250,000 | 5.5% | EDGAR |
| SC 13G | 2017-02-15 | SABBY MANAGEMENT, LLC | SIGMA LABS, INC. | 125,000 | 2.7% | EDGAR |