| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | BELL 02.16.24 | 16 Feb 2024 | 15 Feb 2024 | 001-38874 |
| 4 | Open Document | Open Filing | BELL 02.15.24 | 15 Feb 2024 | 14 Feb 2024 | 001-38874 |
| 4 | Open Document | Open Filing | BELL 02.09.24 | 13 Feb 2024 | 09 Feb 2024 | 001-38874 |
| 4/A | Open Document | Open Filing | BELL 02.23.23 A | 14 Mar 2023 | 23 Feb 2023 | 001-38874 |
| 4/A | Open Document | Open Filing | BELL 02.15.23 A | 14 Mar 2023 | 15 Feb 2023 | 001-38874 |
| 4/A | Open Document | Open Filing | BELL 02.08.23 A | 14 Mar 2023 | 08 Feb 2023 | 001-38874 |
| 4 | Open Document | Open Filing | BELL FORM 4 02.23.23 | 24 Feb 2023 | 23 Feb 2023 | 001-38874 |
| 4 | Open Document | Open Filing | BELL FORM 4 02.17.23 | 17 Feb 2023 | 15 Feb 2023 | 001-38874 |
| 4 | Open Document | Open Filing | BELL FORM 4 02.10.23 | 10 Feb 2023 | 08 Feb 2023 | 001-38874 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Mar 2022 | 23 Feb 2022 | 001-38874 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Mar 2022 | 12 Feb 2022 | 001-38874 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Mar 2022 | 09 Feb 2022 | 001-38874 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Feb 2022 | 23 Feb 2022 | 001-38874 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Feb 2022 | 12 Feb 2022 | 001-38874 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Feb 2022 | 09 Feb 2022 | 001-38874 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Feb 2021 | 23 Feb 2021 | 001-38874 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Feb 2021 | 12 Feb 2021 | 001-38874 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Mar 2020 | 14 Feb 2020 | 001-38874 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Feb 2020 | 12 Feb 2020 | 001-38874 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Feb 2019 | 13 Feb 2019 | 000-23976 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2019 | 08 Feb 2019 | 000-23976 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Feb 2018 | 14 Feb 2018 | 000-23976 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Feb 2018 | 08 Feb 2018 | 000-23976 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Feb 2018 | 14 Feb 2018 | 000-23976 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2018 | 08 Feb 2018 | 000-23976 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Feb 2017 | 11 Feb 2017 | 000-23976 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Feb 2017 | 08 Feb 2017 | 000-23976 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Feb 2016 | 10 Feb 2016 | 000-23976 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2016 | 10 Feb 2016 | 000-23976 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Feb 2015 | 11 Feb 2015 | 000-23976 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Feb 2015 | 11 Feb 2015 | 000-23976 |