| Form type | Sec Links | Description | Filing date | Reporting date |
|---|---|---|---|---|
| SC 13G/A | Report | SC 13G/A | Feb 14, 2023 | |
| SC 13G/A | Report | SC 13G/A | Feb 14, 2023 | |
| SC 13G/A | Report | SC 13G/A | Feb 14, 2023 | |
| SC 13G | Report | Feb 14, 2022 | ||
| SC 13G | Report | Feb 14, 2022 | ||
| SC 13G | Report | Feb 14, 2022 | ||
| SC 13D/A | Report | SC 13D/A | Dec 27, 2021 | |
| SC 13D/A | Report | SC 13D/A | Nov 23, 2021 | |
| SC 13D/A | Report | SC 13D/A | Oct 6, 2021 | |
| SC 13D/A | Report | Sep 24, 2021 | ||
| SC 13D/A | Report | SC 13D/A | Mar 11, 2021 | |
| SC 13D/A | Report | HOUGHTON MIFFLIN HARCOURT COMPANY | Dec 10, 2020 | |
| SC 13D/A | Report | HOUGHTON MIFFLIN HARCOURT CO | Nov 5, 2020 | |
| SC 13G/A | Report | Feb 13, 2020 | ||
| SC 13G/A | Report | Feb 13, 2020 | ||
| SC 13G/A | Report | Feb 13, 2020 | ||
| SC 13D/A | Report | Mar 8, 2019 | ||
| SC 13G | Report | Feb 14, 2019 | ||
| SC 13G | Report | Feb 14, 2019 | ||
| SC 13G/A | Report | Feb 14, 2019 | ||
| SC 13D/A | Report | Oct 3, 2018 | ||
| SC 13D | Report | May 24, 2018 | ||
| SC 13G/A | Report | Feb 14, 2018 | ||
| SC 13G/A | Report | Feb 14, 2018 | ||
| SC 13G/A | Report | Feb 14, 2018 | ||
| SC 13G | Report | Feb 14, 2018 | ||
| SC 13G/A | Report | SC 13G/A | Jan 26, 2018 | |
| SC 13G | Report | SC 13G | Jan 24, 2018 | |
| SC 13G/A | Report | Dec 20, 2017 | ||
| SC 13D | Report | May 8, 2017 | ||
| SC 13G | Report | Feb 14, 2017 | ||
| SC 13G/A | Report | Feb 14, 2017 | ||
| SC 13G/A | Report | Feb 14, 2017 | ||
| SC 13G/A | Report | Feb 8, 2017 | ||
| SC 13G/A | Report | Feb 7, 2017 | ||
| SC 13G/A | Report | Feb 7, 2017 | ||
| SC 13G | Report | Jan 3, 2017 | ||
| SC 13D/A | Report | ANCHORAGE CAPITAL GROUP, LLC SC 13DA 12-21-2016 (HOUGHTON MIFFLIN HARCOURT COMPA | Dec 22, 2016 | |
| SC 13G | Report | Oct 11, 2016 | ||
| SC 13G/A | Report | Jun 9, 2016 | ||
| SC 13D/A | Report | AMENDMENT NO. 4 TO SCHEDULE 13D | Mar 1, 2016 | |
| SC 13D/A | Report | SC 13D/A | Feb 26, 2016 | |
| SC 13G/A | Report | Feb 16, 2016 | ||
| SC 13G/A | Report | Feb 16, 2016 | ||
| SC 13G | Report | Feb 16, 2016 | ||
| SC 13G/A | Report | Feb 16, 2016 | ||
| SC 13G/A | Report | Feb 16, 2016 | ||
| SC 13G/A | Report | Feb 16, 2016 | ||
| SC 13D/A | Report | AMENDMENT NO. 3 TO SCHEDULE 13D | Jan 22, 2016 | |
| SC 13D/A | Report | AMENDMENT NO. 2 TO SCHEDULE 13D | Dec 14, 2015 | |
| SC 13D | Report | Nov 24, 2015 | ||
| SC 13G/A | Report | Sep 17, 2015 | ||
| SC 13D/A | Report | SC 13D/A | Aug 10, 2015 | |
| SC 13D/A | Report | SC 13D/A | Aug 5, 2015 | |
| SC 13D/A | Report | SC 13D/A | Jun 11, 2015 | |
| SC 13D/A | Report | SC 13D/A | Jun 8, 2015 | |
| SC 13G/A | Report | Apr 7, 2015 | ||
| SC 13D/A | Report | AMENDMENT NO. 1 TO SCHEDULE 13D | Apr 2, 2015 | |
| SC 13D/A | Report | SC 13D/A | Apr 2, 2015 | |
| SC 13D/A | Report | SC 13D/A | Mar 27, 2015 | |
| SC 13G | Report | Mar 13, 2015 | ||
| SC 13G | Report | Feb 17, 2015 | ||
| SC 13G/A | Report | Feb 17, 2015 | ||
| SC 13G/A | Report | Feb 17, 2015 | ||
| SC 13G/A | Report | Feb 17, 2015 | ||
| SC 13G/A | Report | Feb 17, 2015 | ||
| SC 13G/A | Report | Feb 17, 2015 | ||
| SC 13G/A | Report | Feb 17, 2015 | ||
| SC 13D/A | Report | Jan 9, 2015 | ||
| SC 13D/A | Report | SC 13D/A | Apr 9, 2014 | |
| SC 13D/A | Report | SC 13D/A | Mar 21, 2014 | |
| SC 13D/A | Report | SC 13D/A | Feb 24, 2014 | |
| SC 13G | Report | Feb 14, 2014 | ||
| SC 13G | Report | Feb 14, 2014 | ||
| SC 13G/A | Report | Feb 14, 2014 | ||
| SC 13G/A | Report | Feb 14, 2014 | ||
| SC 13D/A | Report | Jan 24, 2014 | ||
| SC 13D/A | Report | Dec 4, 2013 | ||
| SC 13D/A | Report | Nov 27, 2013 | ||
| SC 13G | Report | Nov 25, 2013 | ||
| SC 13D | Report | SCHEDULE 13D | Oct 15, 2013 | |
| SC 13D/A | Report | Jun 17, 2013 | ||
| SC 13G/A | Report | Jun 10, 2013 | ||
| SC 13D/A | Report | Mar 22, 2013 | ||
| SC 13G/A | Report | Feb 14, 2013 | ||
| SC 13G/A | Report | Feb 14, 2013 | ||
| SC 13G/A | Report | Feb 14, 2013 | ||
| SC 13G/A | Report | Feb 14, 2013 | ||
| SC 13D/A | Report | Sep 27, 2012 | ||
| SC 13D/A | Report | Jun 29, 2012 | ||
| SC 13D/A | Report | May 24, 2012 | ||
| SC 13D | Report | May 14, 2012 | ||
| SC 13G/A | Report | Feb 14, 2012 | ||
| SC 13G | Report | Feb 14, 2012 | ||
| SC 13G | Report | Feb 14, 2012 | ||
| SC 13G | Report | Feb 14, 2012 | ||
| SC 13G/A | Report | Feb 14, 2012 | ||
| SC 13G | Report | Feb 14, 2012 | ||
| SC 13G | Report | Feb 14, 2012 | ||
| SC 13G | Report | Feb 14, 2012 | ||
| SC 13G/A | Report | Feb 14, 2012 | ||
| SC 13G/A | Report | Feb 14, 2012 | ||
| SC 13D | Report | Feb 28, 2011 | ||
| SC 13G | Report | Feb 14, 2011 | ||
| SC 13G | Report | Feb 14, 2011 | ||
| SC 13G/A | Report | Feb 14, 2011 | ||
| SC 13G/A | Report | Feb 14, 2011 | ||
| SC 13G/A | Report | Feb 14, 2011 | ||
| SC 13G/A | Report | Feb 14, 2011 | ||
| SC 13D/A | Report | Dec 30, 2010 | ||
| SC 13D | Report | Oct 12, 2010 |