WESTPORT FUEL SYSTEMS INC. — All Filings
824 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
All
144
3
4
4/A
40-F
40-F/A
425
6-K
6-K/A
8-A12B
CERTNAS
CORRESP
EFFECT
F-10
F-10/A
F-3
F-4
F-4 POS
F-4/A
F-X
FWP
POS AM
REGDEX
S-8
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13D/A
SCHEDULE 13G
SCHEDULE 13G/A
SD
SUPPL
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 6-K | FORM 6-K | 0001171843-26-001985 | Mar 27, 2026 | — |
| 6-K | FORM 6-K | 0001171843-26-001812 | Mar 20, 2026 | — |
| 6-K | FORM 6-K | 0001171843-26-001535 | Mar 13, 2026 | Mar 12, 2026 |
| SCHEDULE 13G/A | — | 0000810972-26-000016 | Feb 6, 2026 | — |
| 6-K | FORM 6-K | 0001171843-26-000614 | Feb 4, 2026 | — |
| SCHEDULE 13G/A | — | 0000903064-26-000004 | Jan 27, 2026 | — |
| 6-K | FORM 6-K | 0001171843-26-000325 | Jan 20, 2026 | Jan 19, 2026 |
| 6-K | 6-K | 0001370416-26-000003 | Jan 14, 2026 | — |
| 6-K | FORM 6-K | 0001171843-26-000011 | Jan 2, 2026 | — |
| 6-K | FORM 6-K | 0001171843-25-007499 | Nov 21, 2025 | Nov 20, 2025 |
| 6-K | FORM 6-K | 0001171843-25-007184 | Nov 12, 2025 | Nov 10, 2025 |
| 6-K | 6-K | 0001370416-25-000035 | Nov 10, 2025 | Sep 30, 2025 |
| 6-K | FORM 6-K | 0001171843-25-007080 | Nov 6, 2025 | — |
| 6-K | FORM 6-K | 0001171843-25-006602 | Oct 22, 2025 | — |
| 6-K | FORM 6-K | 0001171843-25-006421 | Oct 14, 2025 | — |
| 6-K/A | 6-K/A | 0001370416-25-000032 | Oct 1, 2025 | Jun 30, 2025 |
| 144 | — | 0001901405-25-000002 | Sep 16, 2025 | — |
| 6-K | FORM 6-K | 0001171843-25-005602 | Aug 27, 2025 | Aug 26, 2025 |
| EFFECT | — | 9999999995-25-002732 | Aug 22, 2025 | — |
| CORRESP | — | 0001370416-25-000028 | Aug 20, 2025 | — |
| UPLOAD | — | 0000000000-25-008826 | Aug 20, 2025 | — |
| 6-K | FORM 6-K | 0001171843-25-005452 | Aug 18, 2025 | Aug 15, 2025 |
| F-3 | F-3 | 0001370416-25-000026 | Aug 15, 2025 | — |
| 6-K | FORM 6-K | 0001171843-25-005293 | Aug 12, 2025 | Aug 11, 2025 |
| 6-K | 6-K | 0001370416-25-000023 | Aug 11, 2025 | Jun 30, 2025 |
| 6-K | FORM 6-K | 0001171843-25-004786 | Jul 29, 2025 | — |
| 6-K | FORM 6-K | 0001171843-25-004146 | Jun 26, 2025 | — |
| SD | SD | 0001370416-25-000021 | May 27, 2025 | — |
| 6-K | FORM 6-K | 0001171843-25-003259 | May 16, 2025 | May 15, 2025 |
| 6-K | 6-K | 0001370416-25-000019 | May 13, 2025 | Mar 31, 2025 |
| 6-K | FORM 6-K | 0001171843-25-003141 | May 13, 2025 | — |
| SCHEDULE 13D/A | — | 0000950170-25-062043 | May 1, 2025 | — |
| 6-K | 6-K | 0001370416-25-000017 | May 1, 2025 | — |
| 6-K | FORM 6-K | 0001171843-25-002665 | May 1, 2025 | Apr 30, 2025 |
| 6-K | FORM 6-K | 0001171843-25-002307 | Apr 18, 2025 | Apr 17, 2025 |
| 6-K | 6-K | 0001370416-25-000013 | Apr 10, 2025 | — |
| 6-K | 6-K | 0001370416-25-000009 | Apr 4, 2025 | Dec 31, 2024 |
| 6-K | 6-K | 0001370416-25-000007 | Mar 31, 2025 | Dec 31, 2024 |
| 40-F | 40-F | 0001370416-25-000004 | Mar 31, 2025 | Dec 31, 2024 |
| 6-K | FORM 6-K | 0001171843-25-001828 | Mar 31, 2025 | — |
| 6-K | FORM 6-K | 0001171843-25-001825 | Mar 31, 2025 | — |
| 6-K | FORM 6-K | 0001171843-25-001577 | Mar 19, 2025 | — |
| SCHEDULE 13G | — | 0000950170-25-021031 | Feb 14, 2025 | — |
| SCHEDULE 13G | — | 0000810972-25-000020 | Feb 11, 2025 | — |
| SCHEDULE 13G | — | 0000903064-25-000005 | Feb 5, 2025 | — |
| 6-K | FORM 6-K | 0001171843-25-000357 | Jan 22, 2025 | — |
| 6-K | FORM 6-K | 0001171843-25-000198 | Jan 13, 2025 | — |
| 6-K | FORM 6-K | 0001171843-24-006293 | Nov 13, 2024 | Nov 12, 2024 |
| 6-K | 6-K | 0001370416-24-000022 | Nov 12, 2024 | Sep 30, 2024 |
| 6-K | FORM 6-K | 0001171843-24-005758 | Oct 23, 2024 | — |