| Filed | Form | Filer | Stake | Shares | |
|---|---|---|---|---|---|
| 2021-12-21 | SC | GAMCO INVESTORS, INC. ET AL | — | — | view → |
| 2021-12-10 | SC | GAMCO INVESTORS, INC. ET AL | — | — | view → |
| 2021-11-29 | SC | GAMCO INVESTORS, INC. ET AL | — | — | view → |
| 2021-09-08 | SC | GAMCO INVESTORS, INC. ET AL | — | — | view → |
| 2021-08-30 | SC | GAMCO INVESTORS, INC. ET AL | — | — | view → |
| 2021-04-01 | SC | GAMCO INVESTORS, INC. ET AL | — | — | view → |
| 2020-12-18 | SC | GAMCO INVESTORS, INC. ET AL | — | — | view → |
| 2018-07-09 | SC | GAMCO INVESTORS, INC. ET AL | — | — | view → |
| Filed | Form | Issuer | Stake | Shares | |
|---|---|---|---|---|---|
| 2024-07-08 | SC | Superior Drilling Products, Inc. | — | — | view → |
| 2023-06-01 | SC | SERVOTRONICS INC /DE/ | — | — | view → |
| 2023-03-16 | SC | Firsthand Technology Value Fund, Inc. SVVC | — | — | view → |
| 2023-02-22 | SC | Superior Drilling Products, Inc. | — | — | view → |
| 2022-12-07 | SC | Firsthand Technology Value Fund, Inc. SVVC | — | — | view → |
| 2022-07-13 | SC | Superior Drilling Products, Inc. | — | — | view → |
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