| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 22 Sep 2021 | 22 Sep 2021 | 001-13953 |
| 4 | Open Document | Open Filing | FORM 4 | 12 May 2021 | 11 May 2021 | 001-13953 |
| 4/A | Open Document | Open Filing | FORM 4/A | 28 May 2020 | 12 May 2020 | 001-13953 |
| 4 | Open Document | Open Filing | FORM 4 | 14 May 2020 | 12 May 2020 | 001-13953 |
| 4 | Open Document | Open Filing | FORM 4 | 09 May 2019 | 08 May 2019 | 001-13953 |
| 4 | Open Document | Open Filing | FORM 4 | 11 May 2018 | 09 May 2018 | 001-13953 |
| 4 | Open Document | Open Filing | FORM 4 | 10 May 2017 | 09 May 2017 | 001-13953 |
| 4 | Open Document | Open Filing | FORM 4 | 06 May 2016 | 05 May 2016 | 001-13953 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 03 Jun 2015 | 31 May 2015 | 001-15755 |
| 4 | Open Document | Open Filing | FORM 4 | 08 May 2015 | 07 May 2015 | 001-13953 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 02 Mar 2015 | 02 Mar 2015 | 001-31341 |
| 4 | Open Document | Open Filing | FORM 4 | 09 May 2014 | 08 May 2014 | 001-13953 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 07 May 2014 | 06 May 2014 | 001-15755 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 Apr 2014 | 22 Apr 2014 | 001-31341 |
| 4 | Open Document | Open Filing | FORM 4 | 28 Feb 2014 | 27 Feb 2014 | 001-13953 |