| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 13F-HR | Open Document | Open Filing | Nov 14, 2025 | Sep 30, 2025 | 028-11711 | |
| N-PX | Open Document | Open Filing | Sep 2, 2025 | Jun 30, 2025 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Aug 14, 2025 | Jun 30, 2025 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | May 15, 2025 | Mar 31, 2025 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Feb 14, 2025 | Dec 31, 2024 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Nov 14, 2024 | Sep 30, 2024 | 028-11711 | |
| N-PX | Open Document | Open Filing | Sep 3, 2024 | Jun 30, 2024 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Aug 14, 2024 | Jun 30, 2024 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | May 15, 2024 | Mar 31, 2024 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Feb 14, 2024 | Dec 31, 2023 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Nov 14, 2023 | Sep 30, 2023 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Aug 14, 2023 | Jun 30, 2023 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | May 15, 2023 | Mar 31, 2023 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Feb 14, 2023 | Dec 31, 2022 | 028-11711 | |
| SC 13G/A | Open Document | Open Filing | SC 13G/A | Feb 14, 2023 | ||
| SC 13G/A | Open Document | Open Filing | SC 13G/A | Feb 14, 2023 | ||
| SC 13G/A | Open Document | Open Filing | SC 13G/A | Feb 14, 2023 | ||
| 13F-HR | Open Document | Open Filing | Nov 14, 2022 | Sep 30, 2022 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Aug 15, 2022 | Jun 30, 2022 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | May 16, 2022 | Mar 31, 2022 | 028-11711 | |
| SC 13G | Open Document | Open Filing | Feb 14, 2022 | |||
| SC 13G | Open Document | Open Filing | Feb 14, 2022 | |||
| SC 13G | Open Document | Open Filing | Feb 14, 2022 | |||
| 13F-HR | Open Document | Open Filing | Feb 14, 2022 | Dec 31, 2021 | 028-11711 | |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Dec 27, 2021 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Nov 23, 2021 | ||
| 13F-HR | Open Document | Open Filing | Nov 15, 2021 | Sep 30, 2021 | 028-11711 | |
| 4 | Open Document | Open Filing | FORM 4 | Oct 6, 2021 | Oct 4, 2021 | 001-12719 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Oct 6, 2021 | ||
| 4 | Open Document | Open Filing | FORM 4 | Sep 24, 2021 | Sep 22, 2021 | 001-12719 |
| SC 13D/A | Open Document | Open Filing | Sep 24, 2021 | |||
| 4 | Open Document | Open Filing | FORM 4 | Sep 10, 2021 | Sep 8, 2021 | 001-12719 |
| 13F-HR | Open Document | Open Filing | Aug 16, 2021 | Jun 30, 2021 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | May 14, 2021 | Mar 31, 2021 | 028-11711 | |
| 4 | Open Document | Open Filing | FORM 4 | Mar 11, 2021 | Mar 9, 2021 | 001-12719 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Mar 11, 2021 | ||
| 13F-HR | Open Document | Open Filing | Feb 16, 2021 | Dec 31, 2020 | 028-11711 | |
| 4 | Open Document | Open Filing | Dec 10, 2020 | Dec 8, 2020 | 001-36166 | |
| SC 13D/A | Open Document | Open Filing | HOUGHTON MIFFLIN HARCOURT COMPANY | Dec 10, 2020 | ||
| 13F-HR | Open Document | Open Filing | Nov 16, 2020 | Sep 30, 2020 | 028-11711 | |
| SC 13D/A | Open Document | Open Filing | HOUGHTON MIFFLIN HARCOURT CO | Nov 5, 2020 | ||
| 13F-HR | Open Document | Open Filing | Aug 14, 2020 | Jun 30, 2020 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | May 15, 2020 | Mar 31, 2020 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Feb 14, 2020 | Dec 31, 2019 | 028-11711 | |
| SC 13G/A | Open Document | Open Filing | Feb 13, 2020 | |||
| SC 13G/A | Open Document | Open Filing | Feb 13, 2020 | |||
| SC 13G/A | Open Document | Open Filing | Feb 13, 2020 | |||
| 13F-HR | Open Document | Open Filing | Nov 14, 2019 | Sep 30, 2019 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Aug 14, 2019 | Jun 30, 2019 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | May 15, 2019 | Mar 31, 2019 | 028-11711 | |
| 4 | Open Document | Open Filing | May 13, 2019 | May 9, 2019 | 001-38088 | |
| 4 | Open Document | Open Filing | Mar 8, 2019 | Mar 7, 2019 | 001-36166 | |
| SC 13D/A | Open Document | Open Filing | Mar 8, 2019 | |||
| SC 13G | Open Document | Open Filing | Feb 14, 2019 | |||
| SC 13G | Open Document | Open Filing | Feb 14, 2019 | |||
| SC 13G/A | Open Document | Open Filing | Feb 14, 2019 | |||
| 13F-HR | Open Document | Open Filing | Feb 14, 2019 | Dec 31, 2018 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Nov 14, 2018 | Sep 30, 2018 | 028-11711 | |
| SC 13D/A | Open Document | Open Filing | Oct 3, 2018 | |||
| 13F-HR | Open Document | Open Filing | Aug 14, 2018 | Jun 30, 2018 | 028-11711 | |
| SC 13D | Open Document | Open Filing | May 24, 2018 | |||
| 13F-HR | Open Document | Open Filing | May 15, 2018 | Mar 31, 2018 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Feb 14, 2018 | Dec 31, 2017 | 028-11711 | |
| SC 13G/A | Open Document | Open Filing | Feb 14, 2018 | |||
| SC 13G/A | Open Document | Open Filing | Feb 14, 2018 | |||
| SC 13G/A | Open Document | Open Filing | Feb 14, 2018 | |||
| SC 13G | Open Document | Open Filing | Feb 14, 2018 | |||
| SC 13G/A | Open Document | Open Filing | SC 13G/A | Jan 26, 2018 | ||
| SC 13G | Open Document | Open Filing | SC 13G | Jan 24, 2018 | ||
| 4 | Open Document | Open Filing | Dec 20, 2017 | Dec 18, 2017 | 001-34956 | |
| SC 13G/A | Open Document | Open Filing | Dec 20, 2017 | |||
| 13F-HR | Open Document | Open Filing | Nov 14, 2017 | Sep 30, 2017 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Aug 14, 2017 | Jun 30, 2017 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | May 15, 2017 | Mar 31, 2017 | 028-11711 | |
| 3 | Open Document | Open Filing | May 9, 2017 | May 9, 2017 | 001-38088 | |
| 3 | Open Document | Open Filing | May 8, 2017 | Apr 27, 2017 | 001-37712 | |
| SC 13D | Open Document | Open Filing | May 8, 2017 | |||
| 13F-HR | Open Document | Open Filing | Feb 14, 2017 | Dec 31, 2016 | 028-11711 | |
| SC 13G/A | Open Document | Open Filing | Feb 14, 2017 | |||
| SC 13G | Open Document | Open Filing | Feb 14, 2017 | |||
| SC 13G/A | Open Document | Open Filing | Feb 14, 2017 | |||
| SC 13G/A | Open Document | Open Filing | Feb 8, 2017 | |||
| SC 13G/A | Open Document | Open Filing | Feb 7, 2017 | |||
| SC 13G/A | Open Document | Open Filing | Feb 7, 2017 | |||
| SC 13G | Open Document | Open Filing | Jan 3, 2017 | |||
| 3 | Open Document | Open Filing | Jan 3, 2017 | Dec 22, 2016 | 001-12719 | |
| SC 13D/A | Open Document | Open Filing | ANCHORAGE CAPITAL GROUP, LLC SC 13DA 12-21-2016 (HOUGHTON MIFFLIN HARCOURT COMPA | Dec 22, 2016 | ||
| 13F-HR | Open Document | Open Filing | Nov 14, 2016 | Sep 30, 2016 | 028-11711 | |
| SC 13G | Open Document | Open Filing | Oct 11, 2016 | |||
| 13F-HR | Open Document | Open Filing | Aug 15, 2016 | Jun 30, 2016 | 028-11711 | |
| SC 13G/A | Open Document | Open Filing | Jun 9, 2016 | |||
| 13F-HR | Open Document | Open Filing | May 16, 2016 | Mar 31, 2016 | 028-11711 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 4 TO SCHEDULE 13D | Mar 1, 2016 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Feb 26, 2016 | ||
| SC 13G | Open Document | Open Filing | Feb 16, 2016 | |||
| SC 13G/A | Open Document | Open Filing | Feb 16, 2016 | |||
| SC 13G/A | Open Document | Open Filing | Feb 16, 2016 | |||
| SC 13G/A | Open Document | Open Filing | Feb 16, 2016 | |||
| SC 13G/A | Open Document | Open Filing | Feb 16, 2016 | |||
| SC 13G/A | Open Document | Open Filing | Feb 16, 2016 | |||
| 13F-HR | Open Document | Open Filing | Feb 16, 2016 | Dec 31, 2015 | 028-11711 | |
| 4 | Open Document | Open Filing | FORM 4 | Feb 10, 2016 | Feb 8, 2016 | 001-34956 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 5, 2016 | Feb 3, 2016 | 001-34956 |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 3 TO SCHEDULE 13D | Jan 22, 2016 | ||
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 2 TO SCHEDULE 13D | Dec 14, 2015 | ||
| SC 13D | Open Document | Open Filing | Nov 24, 2015 | |||
| 13F-HR | Open Document | Open Filing | Nov 16, 2015 | Sep 30, 2015 | 028-11711 | |
| 3 | Open Document | Open Filing | FORM 3 | Sep 25, 2015 | Sep 15, 2015 | 001-34956 |
| SC 13G/A | Open Document | Open Filing | Sep 17, 2015 | |||
| 13F-HR | Open Document | Open Filing | Aug 14, 2015 | Jun 30, 2015 | 028-11711 | |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Aug 10, 2015 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Aug 5, 2015 | ||
| 4 | Open Document | Open Filing | FORM 4 | Jun 30, 2015 | Jun 26, 2015 | 001-36166 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Jun 11, 2015 | ||
| 4 | Open Document | Open Filing | 4 | Jun 8, 2015 | Jun 4, 2015 | 001-31567 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Jun 8, 2015 | ||
| 13F-HR | Open Document | Open Filing | May 15, 2015 | Mar 31, 2015 | 028-11711 | |
| SC 13G/A | Open Document | Open Filing | Apr 7, 2015 | |||
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 1 TO SCHEDULE 13D | Apr 2, 2015 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Apr 2, 2015 | ||
| 4 | Open Document | Open Filing | 4 | Mar 30, 2015 | Mar 26, 2015 | 001-31567 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Mar 27, 2015 | ||
| SC 13G | Open Document | Open Filing | Mar 13, 2015 | |||
| 4 | Open Document | Open Filing | FORM 4 | Mar 10, 2015 | Mar 6, 2015 | 001-34956 |
| 3 | Open Document | Open Filing | FORM 3 | Mar 10, 2015 | Mar 5, 2015 | 001-34956 |
| SC 13G | Open Document | Open Filing | Feb 17, 2015 | |||
| SC 13G/A | Open Document | Open Filing | Feb 17, 2015 | |||
| SC 13G/A | Open Document | Open Filing | Feb 17, 2015 | |||
| SC 13G/A | Open Document | Open Filing | Feb 17, 2015 | |||
| SC 13G/A | Open Document | Open Filing | Feb 17, 2015 | |||
| SC 13G/A | Open Document | Open Filing | Feb 17, 2015 | |||
| SC 13G/A | Open Document | Open Filing | Feb 17, 2015 | |||
| 13F-HR | Open Document | Open Filing | Feb 17, 2015 | Dec 31, 2014 | 028-11711 | |
| SC 13D/A | Open Document | Open Filing | Jan 9, 2015 | |||
| 13F-HR | Open Document | Open Filing | Nov 14, 2014 | Sep 30, 2014 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | Aug 14, 2014 | Jun 30, 2014 | 028-11711 | |
| 13F-HR | Open Document | Open Filing | May 15, 2014 | Mar 31, 2014 | 028-11711 | |
| 4 | Open Document | Open Filing | 4 | Apr 9, 2014 | Apr 7, 2014 | 001-31567 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Apr 9, 2014 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Mar 21, 2014 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Feb 24, 2014 | ||
| SC 13G | Open Document | Open Filing | Feb 14, 2014 | |||
| SC 13G | Open Document | Open Filing | Feb 14, 2014 | |||
| SC 13G/A | Open Document | Open Filing | Feb 14, 2014 | |||
| SC 13G/A | Open Document | Open Filing | Feb 14, 2014 | |||
| 13F-HR | Open Document | Open Filing | Feb 14, 2014 | Dec 31, 2013 | 028-11711 | |
| SC 13D/A | Open Document | Open Filing | Jan 24, 2014 |