| Form type | Sec Links | Description | Filing date | Reporting date |
|---|---|---|---|---|
| SC 13G/A | Report | SEC SCHEDULE 13G | Feb 14, 2023 | |
| SC 13G | Report | SC 13G | Feb 10, 2023 | |
| SC 13G | Report | Apr 18, 2022 | ||
| SC 13G/A | Report | SEC SCHEDULE 13G | Apr 11, 2022 | |
| 8-K | Report | Data | 8-K | Apr 7, 2022 | Apr 7, 2022 |
| 8-K | Report | Data | 8-K | Mar 23, 2022 | Mar 21, 2022 |
| 8-K | Report | Data | 8-K | Mar 7, 2022 | Mar 7, 2022 |
| 10-K | Report | Data | 10-K | Feb 24, 2022 | Dec 31, 2021 |
| 8-K | Report | Data | 8-K | Feb 24, 2022 | Feb 24, 2022 |
| 8-K | Report | Data | 8-K | Feb 22, 2022 | Feb 21, 2022 |
| SC 13G | Report | SC 13G | Feb 14, 2022 | |
| SC 13G/A | Report | Feb 14, 2022 | ||
| SC 13G | Report | SCHEDULE 13G | Feb 10, 2022 | |
| SC 13G/A | Report | SEC SCHEDULE 13G | Feb 4, 2022 | |
| SC 13G/A | Report | Feb 3, 2022 | ||
| 10-Q | Report | Data | 10-Q | Nov 4, 2021 | Sep 30, 2021 |
| 8-K | Report | Data | 8-K | Nov 4, 2021 | Nov 4, 2021 |
| 10-Q | Report | Data | 10-Q | Aug 5, 2021 | Jun 30, 2021 |
| 8-K | Report | Data | 8-K | Aug 5, 2021 | Aug 5, 2021 |
| 8-K | Report | Data | 8-K | May 19, 2021 | May 14, 2021 |
| 8-K | Report | Data | 8-K | May 13, 2021 | May 10, 2021 |
| 10-Q | Report | Data | 10-Q | May 6, 2021 | Mar 31, 2021 |
| 8-K | Report | Data | 8-K | May 6, 2021 | May 6, 2021 |
| 8-K | Report | Data | 8-K | Mar 29, 2021 | Mar 26, 2021 |
| 8-K | Report | Data | 8-K | Mar 22, 2021 | Mar 19, 2021 |
| 10-K | Report | Data | 10-K | Feb 25, 2021 | Dec 31, 2020 |
| 8-K | Report | Data | 8-K | Feb 25, 2021 | Feb 25, 2021 |
| SC 13G/A | Report | SEC SCHEDULE 13G | Feb 12, 2021 | |
| SC 13G | Report | SC 13G | Feb 12, 2021 | |
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 10, 2021 | |
| SC 13G/A | Report | SEC SCHEDULE 13G | Feb 8, 2021 | |
| SC 13G/A | Report | SEC SCHEDULE 13G | Feb 4, 2021 | |
| SC 13G/A | Report | Jan 29, 2021 | ||
| SC 13D/A | Report | HOUGHTON MIFFLIN HARCOURT COMPANY | Dec 10, 2020 | |
| SC 13D/A | Report | HOUGHTON MIFFLIN HARCOURT CO | Nov 5, 2020 | |
| 10-Q | Report | Data | 10-Q | Nov 5, 2020 | Sep 30, 2020 |
| 8-K | Report | Data | 8-K | Nov 5, 2020 | Nov 5, 2020 |
| 8-K | Report | Data | 8-K | Oct 6, 2020 | Sep 30, 2020 |
| 8-K | Report | Data | 8-K | Oct 1, 2020 | Sep 30, 2020 |
| 8-K | Report | Data | 8-K | Sep 8, 2020 | Sep 4, 2020 |
| 10-Q | Report | Data | 10-Q | Aug 6, 2020 | Jun 30, 2020 |
| 8-K | Report | Data | 8-K | Aug 6, 2020 | Aug 6, 2020 |
| 8-K | Report | Data | 8-K | May 22, 2020 | May 19, 2020 |
| 10-Q | Report | Data | 10-Q | May 7, 2020 | Mar 31, 2020 |
| 8-K | Report | Data | 8-K | May 7, 2020 | May 7, 2020 |
| 8-K | Report | Data | 8-K | Apr 1, 2020 | Mar 30, 2020 |
| 8-K | Report | Data | 8-K | Mar 27, 2020 | Mar 24, 2020 |
| 10-K | Report | Data | 10-K | Feb 27, 2020 | Dec 31, 2019 |
| 8-K | Report | Data | 8-K | Feb 27, 2020 | Feb 27, 2020 |
| SC 13G | Report | SC 13G | Feb 14, 2020 | |
| SC 13G/A | Report | SEC SCHEDULE 13G | Feb 18, 2020 | |
| SC 13G | Report | SCHEDULE 13G | Feb 12, 2020 | |
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 12, 2020 | |
| SC 13G/A | Report | Feb 5, 2020 | ||
| SC 13G/A | Report | AMENDMENT NO. 2 | Jan 16, 2020 | |
| SC 13G/A | Report | SEC SCHEDULE 13G | Jan 8, 2020 | |
| 8-K | Report | Data | 8-K | Dec 17, 2019 | Dec 16, 2019 |
| 8-K | Report | Data | 8-K | Nov 25, 2019 | Nov 22, 2019 |
| 8-K | Report | Data | 8-K | Nov 20, 2019 | Nov 19, 2019 |
| 10-Q | Report | Data | 10-Q | Oct 31, 2019 | Sep 30, 2019 |
| 8-K | Report | Data | 8-K | Oct 31, 2019 | Oct 31, 2019 |
| 8-K | Report | Data | 8-K | Oct 17, 2019 | Oct 15, 2019 |
| 8-K | Report | Data | 8-K | Sep 30, 2019 | Sep 24, 2019 |
| 10-Q | Report | Data | 10-Q | Aug 8, 2019 | Jun 30, 2019 |
| 8-K | Report | 8-K | Aug 8, 2019 | Aug 8, 2019 |
| 8-K | Report | FORM 8-K | Jul 1, 2019 | Jun 28, 2019 |
| 8-K | Report | 8-K | Jun 17, 2019 | Jun 11, 2019 |
| SC 13G/A | Report | SEC SCHEDULE 13G | Jun 10, 2019 | |
| 8-K | Report | 8-K | May 24, 2019 | May 21, 2019 |
| 10-Q | Report | Data | 10-Q | May 9, 2019 | Mar 31, 2019 |
| 8-K | Report | 8-K | May 9, 2019 | May 9, 2019 |
| SC 13D/A | Report | Mar 8, 2019 | ||
| 10-K | Report | Data | 10-K | Feb 28, 2019 | Dec 31, 2018 |
| 8-K | Report | 8-K | Feb 28, 2019 | Feb 28, 2019 |
| SC 13G/A | Report | AMENDMENT NO. 1 | Feb 14, 2019 | |
| SC 13G/A | Report | Feb 13, 2019 | ||
| SC 13G | Report | SEC SCHEDULE 13G | Feb 13, 2019 | |
| SC 13G/A | Report | Feb 12, 2019 | ||
| SC 13G | Report | SEC SCHEDULE 13G | Feb 12, 2019 | |
| SC 13G/A | Report | Feb 4, 2019 | ||
| SC 13G/A | Report | Nov 13, 2018 | ||
| 10-Q | Report | Data | 10-Q | Nov 8, 2018 | Sep 30, 2018 |
| 8-K | Report | 8-K | Nov 8, 2018 | Nov 8, 2018 |
| 8-K | Report | 8-K | Oct 5, 2018 | Oct 1, 2018 |
| 8-K | Report | 8-K | Sep 12, 2018 | Sep 12, 2018 |
| 10-Q | Report | Data | 10-Q | Aug 2, 2018 | Jun 30, 2018 |
| 8-K | Report | FORM 8-K | Aug 2, 2018 | Aug 2, 2018 |
| SC 13G | Report | Jun 7, 2018 | ||
| 8-K | Report | 8-K | May 25, 2018 | May 22, 2018 |
| 10-Q | Report | Data | 10-Q | May 3, 2018 | Mar 31, 2018 |
| 8-K | Report | 8-K | May 3, 2018 | May 3, 2018 |
| 8-K | Report | 8-K | Mar 5, 2018 | Mar 1, 2018 |
| 10-K | Report | Data | 10-K | Feb 22, 2018 | Dec 31, 2017 |
| 8-K | Report | FORM 8-K | Feb 22, 2018 | Feb 22, 2018 |
| SC 13G/A | Report | Feb 13, 2018 | ||
| SC 13G/A | Report | Feb 9, 2018 | ||
| SC 13G/A | Report | Jan 23, 2018 | ||
| 10-Q | Report | Data | FORM 10-Q | Nov 2, 2017 | Sep 30, 2017 |
| 8-K | Report | FORM 8-K | Nov 2, 2017 | Nov 2, 2017 |
| 8-K | Report | FORM 8-K | Oct 18, 2017 | Oct 16, 2017 |
| 10-Q | Report | Data | FORM 10-Q | Aug 3, 2017 | Jun 30, 2017 |
| 8-K | Report | Data | 8-K | Aug 3, 2017 | Aug 3, 2017 |
| 8-K | Report | FORM 8-K | May 25, 2017 | May 19, 2017 |
| 10-Q | Report | Data | FORM 10-Q | May 4, 2017 | Mar 31, 2017 |
| 8-K | Report | FORM 8-K | May 4, 2017 | May 4, 2017 |
| 8-K/A | Report | FORM 8-K/A | Apr 18, 2017 | Mar 16, 2017 |
| 8-K | Report | FORM 8-K | Mar 16, 2017 | Mar 16, 2017 |
| 10-K | Report | Data | FORM 10-K | Feb 23, 2017 | Dec 31, 2016 |
| 8-K | Report | FORM 8-K | Feb 23, 2017 | Feb 23, 2017 |
| 8-K | Report | FORM 8-K | Feb 15, 2017 | Feb 9, 2017 |
| SC 13G/A | Report | Feb 14, 2017 | ||
| SC 13G/A | Report | AMENDMENT NO.1 TO SCHEDULE 13G | Feb 14, 2017 | |
| SC 13G/A | Report | Feb 13, 2017 | ||
| SC 13G/A | Report | Jan 24, 2017 | ||
| SC 13D/A | Report | ANCHORAGE CAPITAL GROUP, LLC SC 13DA 12-21-2016 (HOUGHTON MIFFLIN HARCOURT COMPA | Dec 22, 2016 | |
| 8-K | Report | FORM 8-K | Dec 22, 2016 | Dec 21, 2016 |
| 10-Q | Report | Data | FORM 10-Q | Nov 3, 2016 | Sep 30, 2016 |
| 8-K | Report | FORM 8-K | Nov 3, 2016 | Nov 3, 2016 |
| 8-K | Report | FORM 8-K | Sep 23, 2016 | Sep 22, 2016 |
| SC 13G/A | Report | FMR LLC SCHEDULE 13G | Aug 16, 2016 | |
| SC 13G | Report | Aug 10, 2016 | ||
| 8-K/A | Report | FORM 8-K/A | Aug 8, 2016 | Jul 18, 2016 |
| 8-K/A | Report | FORM 8-K/A | Aug 8, 2016 | Jun 29, 2016 |
| 10-Q | Report | Data | FORM 10-Q | Aug 4, 2016 | Jun 30, 2016 |
| 8-K | Report | FORM 8-K | Aug 4, 2016 | Aug 4, 2016 |
| 8-K | Report | FORM 8-K | Jul 20, 2016 | Jul 18, 2016 |
| 8-K | Report | FORM 8-K | Jun 30, 2016 | Jun 29, 2016 |
| SC 13G/A | Report | Jun 9, 2016 | ||
| 8-K | Report | FORM 8-K | May 20, 2016 | May 17, 2016 |
| 10-Q | Report | Data | FORM 10-Q | May 4, 2016 | Mar 31, 2016 |
| 8-K | Report | Data | FORM 8-K | May 4, 2016 | May 4, 2016 |
| 8-K | Report | FORM 8-K | Mar 10, 2016 | Mar 10, 2016 |
| 10-K | Report | Data | FORM 10-K | Feb 25, 2016 | Dec 31, 2015 |
| 8-K | Report | FORM 8-K | Feb 25, 2016 | Feb 25, 2016 |
| SC 13G/A | Report | Feb 16, 2016 | ||
| SC 13G/A | Report | Feb 12, 2016 | ||
| SC 13G | Report | Feb 11, 2016 | ||
| SC 13G/A | Report | Feb 8, 2016 | ||
| SC 13G/A | Report | Jan 26, 2016 | ||
| SC 13G | Report | SCHEDULE 13G | Jan 14, 2016 | |
| SC 13D | Report | Nov 24, 2015 | ||
| 8-K | Report | FORM 8-K | Nov 13, 2015 | Nov 9, 2015 |
| 10-Q | Report | Data | 10-Q | Nov 5, 2015 | Sep 30, 2015 |
| 8-K | Report | FORM 8-K | Nov 5, 2015 | Nov 5, 2015 |
| 8-K/A | Report | FORM 8-K AMENDMENT NO.1 | Aug 11, 2015 | May 29, 2015 |
| 10-Q | Report | Data | FORM 10-Q | Aug 6, 2015 | Jun 30, 2015 |
| 8-K | Report | FORM 8-K | Aug 6, 2015 | Aug 6, 2015 |
| 8-K | Report | FORM 8-K | Jul 23, 2015 | Jul 22, 2015 |
| 8-K | Report | FORM 8-K | May 29, 2015 | May 29, 2015 |
| 8-K | Report | FORM 8-K | May 20, 2015 | May 14, 2015 |
| 10-Q | Report | Data | FORM 10-Q | May 7, 2015 | Mar 31, 2015 |
| 8-K | Report | FORM 8-K | May 7, 2015 | May 7, 2015 |
| 8-K | Report | FORM 8-K | May 6, 2015 | May 6, 2015 |
| 8-K | Report | FORM 8-K | Apr 29, 2015 | Apr 28, 2015 |
| 8-K | Report | 8-K | Apr 28, 2015 | Apr 28, 2015 |
| 8-K | Report | FORM 8-K | Apr 24, 2015 | Apr 23, 2015 |
| 8-K | Report | FORM 8-K | Feb 26, 2015 | Feb 26, 2015 |
| 10-K | Report | Data | 10-K | Feb 26, 2015 | Dec 31, 2014 |
| SC 13G/A | Report | Feb 13, 2015 | ||
| SC 13G | Report | Feb 13, 2015 | ||
| SC 13G | Report | Feb 13, 2015 | ||
| SC 13G/A | Report | Feb 4, 2015 | ||
| SC 13G/A | Report | Jan 26, 2015 | ||
| 8-K | Report | FORM 8-K | Dec 12, 2014 | Dec 11, 2014 |
| 10-Q | Report | Data | 10-Q | Nov 6, 2014 | Sep 30, 2014 |
| 8-K | Report | FORM 8-K | Nov 6, 2014 | Nov 6, 2014 |
| SC 13G | Report | Oct 9, 2014 | ||
| 10-Q | Report | Data | 10-Q | Aug 14, 2014 | Jun 30, 2014 |
| 8-K | Report | FORM 8-K | Aug 14, 2014 | Aug 14, 2014 |
| SC 13G | Report | Jul 10, 2014 | ||
| 8-K | Report | FORM 8-K | May 14, 2014 | May 13, 2014 |
| 8-K | Report | FORM 8-K | May 13, 2014 | May 13, 2014 |
| 10-Q | Report | Data | 10-Q | May 8, 2014 | Mar 31, 2014 |
| 8-K | Report | 8-K | May 8, 2014 | May 8, 2014 |
| 10-K | Report | 10-K | Mar 27, 2014 | Dec 31, 2013 |
| 8-K | Report | FORM 8-K | Mar 6, 2014 | Mar 5, 2014 |
| SC 13G/A | Report | Feb 14, 2014 | ||
| SC 13G | Report | Feb 14, 2014 | ||
| SC 13G | Report | Feb 11, 2014 | ||
| 8-K | Report | FORM 8-K | Feb 6, 2014 | Jan 31, 2014 |
| 8-K | Report | FORM 8-K | Jan 16, 2014 | Jan 15, 2014 |
| SC 13G | Report | Jan 15, 2014 | ||
| SC 13G | Report | Nov 25, 2013 | ||
| 8-K | Report | FORM 8-K | Nov 19, 2013 | Nov 13, 2013 |