| Form type | Sec Links | Description | Filing date | Reporting date |
|---|---|---|---|---|
| SC 13D/A | Report | SC 13D/A | May 29, 2024 | |
| SC 13D/A | Report | SC 13D/A | Dec 12, 2023 | |
| SC 13D/A | Report | SC 13D/A | Feb 22, 2022 | |
| SC 13D/A | Report | SC 13D/A | Oct 27, 2020 | |
| SC 13D/A | Report | SC 13D/A | Aug 6, 2020 | |
| SC 13D/A | Report | SC 13D/A | Jun 24, 2020 | |
| SC 13D/A | Report | SC 13D/A | Dec 10, 2019 | |
| SC 13D/A | Report | SC 13D/A | Mar 19, 2019 | |
| SC 13D/A | Report | SC 13D/A | Jul 5, 2018 | |
| SC 13D/A | Report | SC 13D/A | Jun 18, 2018 | |
| SC 13D/A | Report | SC 13D/A | Feb 7, 2018 | |
| SC 13D/A | Report | SC 13D/A | Feb 1, 2018 | |
| SC 13D/A | Report | SC 13D/A | Nov 16, 2017 | |
| SC 13D | Report | SC 13D | Nov 8, 2017 | |
| SC 13D/A | Report | SCHEDULE 13D AMENDMENT NO.7 | Nov 3, 2017 | |
| SC 13D/A | Report | SC 13D/A | Oct 23, 2017 | |
| SC 13D/A | Report | SC 13D/A | Jun 19, 2017 | |
| SC 13D | Report | SC 13D | Jun 5, 2017 | |
| SC 13D/A | Report | SCHEDULE 13D AMENDMENT NO.6 | Nov 1, 2016 | |
| SC 13D/A | Report | SCHEDULE 13D AMENDMENT NO.5 | Mar 2, 2015 | |
| SC 13D/A | Report | SC 13D/A | Nov 12, 2014 | |
| SC 13D/A | Report | SCHEDULE 13D AMENDMENT NO. 3 | Jun 17, 2014 | |
| SC 13D/A | Report | LEVEL 3 COMMUNICATIONS, INC. | May 21, 2012 | |
| SC 13D/A | Report | LEVEL 3 COMMUNICATIONS, INC. | Dec 2, 2011 | |
| SC 13D/A | Report | LEVEL 3 COMMUNICATIONS, INC. | Oct 5, 2011 | |
| SC 13D/A | Report | SCHEDULE 13D/A | Oct 5, 2011 | |
| SC 13D/A | Report | GLOBAL CROSSING LIMITED - FORM SC 13D/A | Apr 13, 2011 | |
| SC 13D/A | Report | SAVVIS, INC. - FORM SC 13D/A | Feb 22, 2011 | |
| SC 13D | Report | SC 13D | Dec 10, 2010 |