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| Form | Report Date | Filing Date | Description |
|---|---|---|---|
| 8-K | 2026-08-21 | 2026-08-24 | 8-K |
| 10-Q | 2026-06-30 | 2026-08-06 | 10-Q |
| 8-K | 2026-08-05 | 2026-08-05 | 8-K |
| 8-K | 2026-06-30 | 2026-06-30 | 8-K |
| 8-K | 2026-05-20 | 2026-05-21 | 8-K |
| 10-Q | 2026-03-31 | 2026-05-05 | 10-Q |
| 8-K | 2026-05-05 | 2026-05-05 | 8-K |
| 8-K | 2026-05-01 | 2026-05-04 | 8-K |
| 10-K | 2025-12-31 | 2026-02-27 | 10-K |
| 8-K | 2026-02-26 | 2026-02-26 | 8-K |
| 8-K | 2025-12-31 | 2026-01-07 | 8-K |
| 8-K | 2025-12-08 | 2025-12-12 | 8-K |
| 10-Q | 2025-09-30 | 2025-11-05 | 10-Q |
| 8-K | 2025-11-04 | 2025-11-04 | 8-K |
| 8-K | 2025-09-10 | 2025-09-11 | 8-K |
| 8-K | 2025-08-11 | 2025-08-11 | 8-K |
| 10-Q | 2025-06-30 | 2025-08-07 | 10-Q |
| 8-K | 2025-08-07 | 2025-08-07 | 8-K |
| 8-K | 2025-05-08 | 2025-05-09 | 8-K |
| 10-Q | 2025-03-31 | 2025-05-02 | 10-Q |
| 8-K | 2025-05-01 | 2025-05-01 | 8-K |
| 8-K | 2025-04-10 | 2025-04-11 | 8-K |
| 10-K | 2024-12-31 | 2025-02-28 | 10-K |
| 8-K | 2025-02-27 | 2025-02-27 | 8-K |
| 8-K | 2025-01-30 | 2025-01-31 | 8-K |
| 8-K | 2024-12-10 | 2024-12-16 | 8-K |
| 10-Q | 2024-09-30 | 2024-11-01 | 10-Q |
| 8-K | 2024-10-31 | 2024-10-31 | 8-K |
| 10-Q | 2024-06-30 | 2024-08-02 | 10-Q |
| 8-K | 2024-08-01 | 2024-08-01 | 8-K |
| 8-K | 2024-06-12 | 2024-06-12 | 8-K |
| 8-K | 2024-05-08 | 2024-05-09 | 8-K |
| 8-K | 2024-05-03 | 2024-05-06 | 8-K |
| 10-Q | 2024-03-31 | 2024-05-03 | 10-Q |
| 8-K | 2024-05-02 | 2024-05-02 | 8-K |
| 10-K | 2023-12-31 | 2024-02-29 | 10-K |
| 8-K | 2024-02-22 | 2024-02-28 | 8-K |
| 8-K | 2024-02-28 | 2024-02-28 | 8-K |
| 8-K | 2023-12-12 | 2023-12-18 | 8-K |
| 8-K | 2023-11-28 | 2023-11-28 | 8-K |
| 10-Q | 2023-09-30 | 2023-11-03 | 10-Q |
| 8-K | 2023-11-02 | 2023-11-02 | 8-K |
| 10-Q | 2023-06-30 | 2023-08-08 | 10-Q |
| 8-K | 2023-08-03 | 2023-08-03 | 8-K |
| 8-K | 2023-05-23 | 2023-05-26 | 8-K |
| 8-K | 2023-05-10 | 2023-05-11 | 8-K |
| 10-Q | 2023-03-31 | 2023-05-05 | 10-Q |
| 8-K | 2023-05-04 | 2023-05-04 | 8-K |
| 8-K | 2023-04-05 | 2023-04-11 | 8-K |
| 8-K | 2023-03-02 | 2023-03-06 | 8-K |
| 10-K | 2022-12-31 | 2023-02-28 | 10-K |
| 8-K | 2023-02-28 | 2023-02-28 | 8-K |
| 8-K | 2022-12-16 | 2022-12-22 | 8-K |
| 8-K | 2022-11-21 | 2022-11-25 | 8-K |
| 8-K | 2022-11-14 | 2022-11-15 | 8-K |
| 8-K | 2022-11-03 | 2022-11-07 | 8-K |
| 10-Q | 2022-09-30 | 2022-11-04 | 10-Q |
| 8-K | 2022-10-27 | 2022-11-02 | 8-K |
| 8-K | 2022-11-01 | 2022-11-01 | 8-K |
| 8-K | 2022-08-03 | 2022-08-05 | 8-K |
| 10-Q | 2022-06-30 | 2022-08-01 | 10-Q |
| 8-K | 2022-07-27 | 2022-08-01 | 8-K |
| 8-K | 2022-07-29 | 2022-07-29 | 8-K |
| 8-K | 2022-05-26 | 2022-05-31 | 8-K |
| 10-Q | 2022-03-31 | 2022-05-03 | 10-Q |
| 8-K | 2022-04-25 | 2022-04-29 | 8-K |
| 8-K | 2022-04-28 | 2022-04-28 | 8-K |
| 10-K | 2021-12-31 | 2022-03-01 | 10-K |
| 8-K | 2022-02-25 | 2022-02-25 | 8-K |
| 8-K | 2021-11-18 | 2021-11-23 | 8-K |
| 8-K | 2020-12-31 | 2021-11-16 | FORM 8-K |
| 10-Q | 2021-09-30 | 2021-11-09 | 10-Q |
| 8-K | 2021-11-09 | 2021-11-09 | 8-K |
| 8-K | 2021-09-14 | 2021-09-14 | 8-K |
| 10-Q | 2021-06-30 | 2021-08-09 | 10-Q |
| 8-K | 2021-08-05 | 2021-08-05 | 8-K |
| 8-K | 2021-08-01 | 2021-08-03 | 8-K |
| 8-K | 2021-07-22 | 2021-07-23 | 8-K |
| 8-K | 2021-07-12 | 2021-07-15 | 8-K |
| 8-K | 2021-06-24 | 2021-06-30 | 8-K |
| 8-K | 2021-06-09 | 2021-06-11 | 8-K |
| 10-Q | 2021-03-31 | 2021-05-17 | 10-Q |
| 8-K | 2021-05-06 | 2021-05-06 | 8-K |
| 8-K | 2021-04-29 | 2021-04-30 | 8-K |
| 8-K | 2021-04-28 | 2021-04-29 | 8-K |
| 8-K | 2021-04-26 | 2021-04-26 | FORM 8-K |
| 8-K | 2021-04-08 | 2021-04-08 | 8-K |
| 8-K | 2021-03-22 | 2021-03-23 | 8-K |
| 10-K | 2020-12-31 | 2021-03-17 | 10-K |
| 8-K | 2021-03-10 | 2021-03-16 | 8-K |
| 8-K | 2021-03-09 | 2021-03-09 | 8-K |
| 8-K | 2021-02-28 | 2021-03-04 | 8-K |
| 8-K | 2020-12-14 | 2020-12-18 | 8-K |
| 8-K | 2020-11-10 | 2020-11-10 | 8-K |
| 10-Q | 2020-09-30 | 2020-11-03 | 10-Q |
| 8-K | 2020-10-30 | 2020-10-30 | 8-K |
| 8-K | 2020-10-15 | 2020-10-16 | FORM 8-K |
| 10-Q | 2020-06-30 | 2020-08-03 | 10-Q |
| 8-K | 2020-07-30 | 2020-07-30 | 8-K |
| 8-K | 2020-07-22 | 2020-07-28 | 8-K |
| 8-K | 2020-05-28 | 2020-06-01 | 8-K |
| 8-K | 2020-05-28 | 2020-05-28 | 8-K |
| 10-Q | 2020-03-31 | 2020-05-11 | 10-Q |
| 8-K | 2020-05-05 | 2020-05-05 | 8-K |
| 8-K | 2020-04-30 | 2020-05-05 | 8-K |
| 8-K | 2020-03-20 | 2020-03-26 | 8-K |
| 8-K | 2020-03-12 | 2020-03-12 | 8-K |
| 8-K | 2020-02-29 | 2020-03-05 | 8-K |
| 10-K | 2019-12-31 | 2020-02-27 | 10-K |
| 8-K | 2020-02-27 | 2020-02-27 | FORM 8-K |
| 8-K | 2020-02-20 | 2020-02-20 | 8-K |
| 8-K | 2020-02-07 | 2020-02-13 | FORM 8-K |
| 8-K | 2020-01-27 | 2020-01-27 | FORM 8-K |
| 8-K | 2019-11-26 | 2019-12-03 | FORM 8-K |
| 8-K | 2019-11-15 | 2019-11-21 | FORM 8-K |
| 10-Q | 2019-09-30 | 2019-11-05 | 10-Q |
| 8-K | 2019-10-28 | 2019-11-01 | FORM 8-K |
| 8-K | 2019-10-31 | 2019-10-31 | 8-K |
| 10-Q | 2019-06-30 | 2019-08-08 | 10-Q |
| 8-K | 2019-08-08 | 2019-08-08 | 8-K |
| 8-K | 2019-05-16 | 2019-05-16 | 8-K |
| 10-Q | 2019-03-31 | 2019-05-10 | PQ GROUP HOLDINGS INC. FORM 10-Q |
| 8-K | 2019-05-09 | 2019-05-09 | PQ GROUP HOLDINGS INC. FORM 8-K |
| 8-K | 2019-05-02 | 2019-05-06 | 8-K |
| 8-K | 2019-03-22 | 2019-03-22 | 8-K |
| 10-K | 2018-12-31 | 2019-03-01 | PQ GROUP HOLDINGS INC. FORM 10-K |
| 8-K | 2019-02-21 | 2019-02-21 | PQ GROUP HOLDINGS INC. FORM 8-K |
| 8-K | 2018-12-21 | 2018-12-26 | 8-K |
| 10-Q | 2018-09-30 | 2018-11-07 | PQ GROUP HOLDINGS INC. FORM 10-Q |
| 8-K | 2018-11-06 | 2018-11-06 | PQ GROUP HOLDINGS INC. FORM 8-K |
| 10-Q | 2018-06-30 | 2018-08-10 | PQ GROUP HOLDINGS INC. FORM 10-Q |
| 8-K | 2018-08-06 | 2018-08-09 | 8-K |
| 8-K | 2018-08-09 | 2018-08-09 | PQ GROUP HOLDINGS INC. FORM 8-K |
| 10-Q | 2018-03-31 | 2018-05-11 | PQ GROUP HOLDINGS INC. FORM 10-Q |
| 8-K | 2018-05-10 | 2018-05-10 | PQ GROUP HOLDINGS INC. FORM 8-K |
| 8-K | 2018-05-04 | 2018-05-08 | 8-K |
| 10-K | 2017-12-31 | 2018-03-22 | PQ GROUP HOLDINGS INC. FORM 10-K |
| 8-K | 2018-03-19 | 2018-03-22 | FORM 8-K |
| 8-K | 2018-03-21 | 2018-03-21 | PQ GROUP HOLDINGS INC. FORM 8-K |
| 8-K | 2018-02-08 | 2018-02-09 | 8-K |
| 8-K | 2017-12-11 | 2017-12-13 | 8-K |
| 8-K | 2017-11-29 | 2017-12-04 | 8-K |
| 10-Q | 2017-09-30 | 2017-11-14 | PQ GROUP HOLDINGS INC. FORM 10-Q |
| 8-K | 2017-11-13 | 2017-11-13 | PQ GROUP HOLDINGS INC. |