| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13G/A | Open Document | Open Filing | Feb 13, 2023 | 005-92103 | ||
| SC 13G/A | Open Document | Open Filing | BANK OF MONTREAL | Feb 6, 2023 | 005-92103 | |
| SC 13G/A | Open Document | Open Filing | Jan 24, 2023 | 005-92103 | ||
| 15-12B | Open Document | Open Filing | 15-12B | May 31, 2022 | 001-39708 | |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | May 24, 2022 | May 19, 2022 | 001-39708 |
| SC 13G/A | Open Document | Open Filing | SC 13G/A | May 20, 2022 | 005-92103 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 20, 2022 | May 19, 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 20, 2022 | May 19, 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 20, 2022 | May 19, 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 20, 2022 | May 19, 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 20, 2022 | May 20, 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 20, 2022 | May 19, 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 20, 2022 | May 20, 2022 | |
| 25-NSE | Open Document | Open Filing | May 19, 2022 | 333-248093 | ||
| 425 | Open Document | Open Filing | 425 | May 18, 2022 | 001-39708 | |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | May 18, 2022 | May 17, 2022 | 001-39708 |
| 425 | Open Document | Open Filing | 425 | May 17, 2022 | 001-39708 | |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | May 17, 2022 | May 16, 2022 | 001-39708 |
| 425 | Open Document | Open Filing | 425 | May 16, 2022 | 001-39708 | |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | May 16, 2022 | May 13, 2022 | 001-39708 |
| 10-Q | Open Document | Data | Open Filing | 10-Q | May 13, 2022 | Mar 31, 2022 | 001-39708 |
| 8-K/A | Open Document | Data | Open Filing | FORM 8-K/A | May 13, 2022 | May 10, 2022 | 001-39708 |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | May 12, 2022 | May 10, 2022 | 001-39708 |
| SC 13G/A | Open Document | Open Filing | KARPUS INVESTMENT MGT / OTR ACQUISITION - SCHEDULE 13G/A(#1) | May 10, 2022 | 005-92103 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 10, 2022 | May 6, 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 10, 2022 | May 6, 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 10, 2022 | May 6, 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 10, 2022 | May 6, 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 10, 2022 | May 6, 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 10, 2022 | May 6, 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 10, 2022 | May 6, 2022 | |
| 425 | Open Document | Open Filing | 425 | May 10, 2022 | 001-39708 | |
| 425 | Open Document | Open Filing | 425 | Apr 27, 2022 | 001-39708 | |
| 425 | Open Document | Open Filing | 425 | Apr 19, 2022 | 001-39708 | |
| 425 | Open Document | Open Filing | 425 | Apr 18, 2022 | 001-39708 | |
| 425 | Open Document | Open Filing | 425 | Apr 18, 2022 | 001-39708 | |
| DEFM14A | Open Document | Open Filing | DEFM14A | Apr 15, 2022 | 001-39708 | |
| 10-K | Open Document | Data | Open Filing | 10-K | Mar 8, 2022 | Dec 31, 2021 | 001-39708 |
| 10-K/A | Open Document | Data | Open Filing | FORM 10-K/A | Mar 8, 2022 | Dec 31, 2020 | 001-39708 |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | Mar 2, 2022 | Mar 1, 2022 | 001-39708 |
| SC 13G | Open Document | Open Filing | SC 13G | Feb 18, 2022 | 005-92103 | |
| SC 13G | Open Document | Open Filing | BANK OF MONTREAL | Feb 15, 2022 | 005-92103 | |
| SC 13G | Open Document | Open Filing | KARPUS INVESTMENT MGT / OTR ACQUISITION - SCHEDULE 13G | Feb 14, 2022 | 005-92103 | |
| SC 13G/A | Open Document | Open Filing | Feb 14, 2022 | 005-92103 | ||
| SC 13G | Open Document | Open Filing | Feb 14, 2022 | 005-92103 | ||
| SC 13G/A | Open Document | Open Filing | Feb 10, 2022 | 005-92103 | ||
| SC 13G | Open Document | Open Filing | SC 13G OTRA | Feb 10, 2022 | 005-92103 | |
| SC 13G/A | Open Document | Open Filing | FORM SC 13G/A | Feb 10, 2022 | 005-92103 | |
| 425 | Open Document | Open Filing | 425 | Feb 8, 2022 | 001-39708 | |
| 425 | Open Document | Open Filing | 425 | Feb 8, 2022 | 001-39708 | |
| 425 | Open Document | Open Filing | 425 | Feb 4, 2022 | 001-39708 | |
| 425 | Open Document | Open Filing | 425 | Feb 4, 2022 | 001-39708 | |
| 8-K | Open Document | Data | Open Filing | 8-K | Feb 4, 2022 | Jan 31, 2022 | 001-39708 |
| 425 | Open Document | Open Filing | 425 | Jan 31, 2022 | 001-39708 | |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | Jan 31, 2022 | Jan 31, 2022 | 001-39708 |
| 10-Q/A | Open Document | Data | Open Filing | 10-Q/A | Dec 13, 2021 | Sep 30, 2021 | 001-39708 |
| 10-K/A | Open Document | Data | Open Filing | FORM 10-K/A | Dec 13, 2021 | Dec 31, 2020 | 001-39708 |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | Nov 30, 2021 | Nov 30, 2021 | 001-39708 |
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 8, 2021 | Sep 30, 2021 | 001-39708 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Aug 6, 2021 | Jul 30, 2021 | |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | Aug 4, 2021 | Jul 30, 2021 | 001-39708 |
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 3, 2021 | Jun 30, 2021 | 001-39708 |
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 25, 2021 | Mar 31, 2021 | 001-39708 |
| 10-K/A | Open Document | Data | Open Filing | FORM 10-K/A | May 18, 2021 | Dec 31, 2020 | 001-39708 |
| NT 10-Q | Open Document | Open Filing | NT 10-Q | May 17, 2021 | Mar 31, 2021 | 001-39708 |
| 8-K | Open Document | Open Filing | FORM 8-K | May 17, 2021 | May 14, 2021 | 001-39708 |
| SC 13G | Open Document | Open Filing | Apr 22, 2021 | 005-92103 | ||
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Mar 3, 2021 | Dec 31, 2020 | 001-39708 |
| SC 13G | Open Document | Open Filing | SC 13G OTR | Feb 24, 2021 | 005-92103 | |
| SC 13G | Open Document | Open Filing | SC 13G | Feb 12, 2021 | 005-92103 | |
| SC 13G | Open Document | Open Filing | OTRA 13G | Feb 10, 2021 | 005-92103 | |
| SC 13G | Open Document | Open Filing | FORM SC 13G | Feb 10, 2021 | 005-92103 | |
| SC 13G | Open Document | Open Filing | 13G | Feb 8, 2021 | 005-92103 | |
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Jan 4, 2021 | Sep 30, 2020 | 001-39708 |
| 8-K | Open Document | Open Filing | FORM 8-K | Dec 8, 2020 | Dec 8, 2020 | 001-39708 |
| 8-K | Open Document | Open Filing | FORM 8-K | Nov 25, 2020 | Nov 19, 2020 | 001-39708 |
| 8-K | Open Document | Open Filing | FORM 8-K | Nov 23, 2020 | Nov 17, 2020 | 001-39708 |
| 424B4 | Open Document | Open Filing | 424B4 | Nov 19, 2020 | 333-248093 | |
| EFFECT | Open Document | Open Filing | Nov 17, 2020 | 333-248093 | ||
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 17, 2020 | Nov 17, 2020 | |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 17, 2020 | Nov 17, 2020 | |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 17, 2020 | Nov 17, 2020 | |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 17, 2020 | Nov 17, 2020 | |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 17, 2020 | Nov 17, 2020 | |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 17, 2020 | Nov 17, 2020 | |
| CERT | Open Document | Open Filing | Nov 16, 2020 | 001-39708 | ||
| 8-A12B | Open Document | Open Filing | 8-A12B | Nov 16, 2020 | 001-39708 | |
| S-1/A | Open Document | Open Filing | S-1/A | Oct 26, 2020 | 333-248093 | |
| S-1/A | Open Document | Open Filing | S-1/A | Sep 28, 2020 | 333-248093 | |
| S-1 | Open Document | Open Filing | FORM S-1 | Aug 18, 2020 | 333-248093 |