Amprius Technologies, Inc. - AMPX
All tracked SEC files for this issuer. Showing up to 200 latest records.
Need parsed ownership details (13D/13G with shares/percent)?
Open ownership details
Form 4 = insider transactions report. Form 144 = notice of proposed sale (not a completed trade confirmation).
Files summary
Total files loaded: 43
Latest filed: May 19, 2026
| Form | Count |
|---|---|
| 4 | 18 |
| 144 | 13 |
| 8-K | 7 |
| 4/A | 2 |
| 8-K/A | 1 |
| SCHEDULE 13G | 1 |
| SCHEDULE 13G/A | 1 |
Latest files
| Filed | Form | Report period | Accession | SEC |
|---|---|---|---|---|
| May 19, 2026 | 8-K/A | May 06, 2026 | 0001899287-26-000051 | View |
| May 08, 2026 | 8-K | May 06, 2026 | 0001899287-26-000047 | View |
| May 07, 2026 | 4 | May 05, 2026 | 0001476220-26-000017 | View |
| May 07, 2026 | 4/A | Dec 19, 2025 | 0002067233-26-000004 | View |
| May 06, 2026 | 8-K | May 06, 2026 | 0001899287-26-000037 | View |
| Apr 28, 2026 | SCHEDULE 13G | — | 0001595888-26-000030 | View |
| Apr 21, 2026 | 8-K | Apr 17, 2026 | 0001899287-26-000022 | View |
| Apr 02, 2026 | 4 | Apr 01, 2026 | 0001476220-26-000015 | View |
| Apr 01, 2026 | 144 | — | 0001950047-26-003170 | View |
| Mar 26, 2026 | SCHEDULE 13G/A | — | 0000102909-26-000623 | View |
| Mar 24, 2026 | 4 | Mar 23, 2026 | 0001476220-26-000013 | View |
| Mar 23, 2026 | 144 | — | 0001950047-26-002926 | View |
| Mar 13, 2026 | 4 | Mar 12, 2026 | 0001835160-26-000007 | View |
| Mar 13, 2026 | 4/A | Mar 04, 2026 | 0001920996-26-000004 | View |
| Mar 12, 2026 | 144 | — | 0001950047-26-002557 | View |
| Mar 12, 2026 | 144 | — | 0001950047-26-002559 | View |
| Mar 12, 2026 | 4 | Mar 10, 2026 | 0001296381-26-000003 | View |
| Mar 10, 2026 | 144 | — | 0001950047-26-002423 | View |
| Mar 06, 2026 | 4 | Mar 04, 2026 | 0001920996-26-000002 | View |
| Mar 06, 2026 | 4 | Mar 04, 2026 | 0001940928-26-000012 | View |
| Mar 06, 2026 | 4 | Mar 04, 2026 | 0002067233-26-000002 | View |
| Mar 04, 2026 | 8-K | Mar 04, 2026 | 0001899287-26-000009 | View |
| Feb 24, 2026 | 144 | — | 0001940928-26-000007 | View |
| Feb 24, 2026 | 144 | — | 0001476220-26-000009 | View |
| Feb 24, 2026 | 4 | Feb 23, 2026 | 0001476220-26-000011 | View |
| Feb 24, 2026 | 4 | Feb 23, 2026 | 0001940928-26-000009 | View |
| Feb 03, 2026 | 8-K | Jan 30, 2026 | 0001899287-26-000005 | View |
| Jan 30, 2026 | 4 | Jan 28, 2026 | 0001940928-26-000004 | View |
| Jan 23, 2026 | 4 | Jan 21, 2026 | 0001940928-26-000002 | View |
| Jan 21, 2026 | 144 | — | 0001950047-26-000610 | View |
| Jan 20, 2026 | 4 | Jan 16, 2026 | 0001476220-26-000005 | View |
| Jan 16, 2026 | 144 | — | 0001950047-26-000519 | View |
| Jan 14, 2026 | 4 | Jan 12, 2026 | 0001476220-26-000003 | View |
| Jan 12, 2026 | 8-K | Jan 12, 2026 | 0001899287-26-000003 | View |
| Jan 12, 2026 | 144 | — | 0001950047-26-000356 | View |
| Dec 22, 2025 | 8-K | Dec 18, 2025 | 0001899287-25-000048 | View |
| Dec 22, 2025 | 4 | Dec 19, 2025 | 0002067233-25-000010 | View |
| Dec 15, 2025 | 4 | Dec 11, 2025 | 0001940928-25-000020 | View |
| Dec 11, 2025 | 144 | — | 0001950047-25-010169 | View |
| Nov 25, 2025 | 144 | — | 0001940928-25-000017 | View |
| Nov 25, 2025 | 144 | — | 0001476220-25-000021 | View |
| Nov 25, 2025 | 4 | Nov 21, 2025 | 0001476220-25-000023 | View |
| Nov 25, 2025 | 4 | Nov 21, 2025 | 0001940928-25-000018 | View |