# Amprius Technologies, Inc.: filings

AMPX · NYSE · CIK 1899287 · [Technology](/sectors/technology.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/ampx.md) · [Financials](/companies/ampx/financials.md) · [Filings](/companies/ampx/filings.md) · [Insiders](/companies/ampx/insiders.md)

## Reports and events: 106 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (4 124, 144 72, 8-K 63, 424B3 56, 3 25, CORRESP 20, 10-Q 14, EFFECT 13, UPLOAD 13, 425 8, S-1/A 7, S-8 6, POS AM 5, S-4/A 5, SCHEDULE 13G/A 5, SC TO-I/A 5, 10-K 4, ARS 4, DEF 14A 4, DEFA14A 4, S-1 4, SC 13D 4, SC 13D/A 4, SC 13G 4, S-4 3, 424B7 2, 4/A 2, 8-K/A 2, SCHEDULE 13G 2, SC TO-I 2, 25-NSE 1, 3/A 1, 424B4 1, 8-A12B 1, CERT 1, D 1, DRS 1, NT 10-Q 1, RW 1, S-3 1, S-3ASR 1, S-4 POS 1, SC 13G/A 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-09-28 | 00:54 ET | [8-K](/filings/0001899287-26-000065.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001899287-26-000065 |
| 2026-08-13 | 20:49 ET | [8-K](/filings/0001899287-26-000062.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001899287-26-000062 |
| 2026-08-06 | 20:22 ET | [10-Q](/filings/0001899287-26-000059.md) | Quarterly report, period 2026-06-30 | 0001899287-26-000059 |
| 2026-08-04 | 20:15 ET | [8-K](/filings/0001899287-26-000056.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001899287-26-000056 |
| 2026-06-17 | 20:25 ET | [8-K](/filings/0001899287-26-000053.md) | 5.07 Shareholder vote results | 0001899287-26-000053 |
| 2026-05-19 | 20:40 ET | [8-K/A](/filings/0001899287-26-000051.md) | 3.02 Unregistered sale of equity | 0001899287-26-000051 |
| 2026-05-07 | 21:36 ET | [8-K](/filings/0001899287-26-000047.md) | 1.01 Entry into a material agreement; 3.02 Unregistered sale of equity; 9.01 Financial statements and exhibits | 0001899287-26-000047 |
| 2026-05-07 | 20:52 ET | [10-Q](/filings/0001899287-26-000045.md) | Quarterly report, period 2026-03-31 | 0001899287-26-000045 |
| 2026-05-06 | 20:11 ET | [8-K](/filings/0001899287-26-000037.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001899287-26-000037 |
| 2026-04-29 | 22:50 ET | [DEF 14A](/filings/0001899287-26-000026.md) | Proxy statement, period 2026-06-11 | 0001899287-26-000026 |
| 2026-04-21 | 20:58 ET | [8-K](/filings/0001899287-26-000022.md) | 4.01 Change of auditor | 0001899287-26-000022 |
| 2026-03-06 | 21:21 ET | [10-K](/filings/0001899287-26-000015.md) | Annual report, period 2025-12-31 | 0001899287-26-000015 |
| 2026-03-04 | 21:20 ET | [8-K](/filings/0001899287-26-000009.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001899287-26-000009 |
| 2026-02-03 | 13:35 ET | [8-K](/filings/0001899287-26-000005.md) | 1.02 Termination of a material agreement | 0001899287-26-000005 |
| 2026-01-12 | 13:36 ET | [8-K](/filings/0001899287-26-000003.md) | 8.01 Other events | 0001899287-26-000003 |
| 2025-12-22 | 13:43 ET | [8-K](/filings/0001899287-25-000048.md) | 5.02 Departure or appointment of officers or directors | 0001899287-25-000048 |
| 2025-11-06 | 22:11 ET | [10-Q](/filings/0001628280-25-050308.md) | Quarterly report, period 2025-09-30 | 0001628280-25-050308 |
| 2025-11-06 | 21:11 ET | [8-K](/filings/0001628280-25-050172.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-25-050172 |
| 2025-10-06 | 12:38 ET | [8-K](/filings/0001899287-25-000045.md) | 5.02 Departure or appointment of officers or directors | 0001899287-25-000045 |
| 2025-09-02 | 20:03 ET | [8-K](/filings/0001899287-25-000044.md) | 5.02 Departure or appointment of officers or directors | 0001899287-25-000044 |
| 2025-08-07 | 21:07 ET | [10-Q](/filings/0001628280-25-038983.md) | Quarterly report, period 2025-06-30 | 0001628280-25-038983 |
| 2025-08-07 | 20:20 ET | [8-K](/filings/0001628280-25-038899.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-25-038899 |
| 2025-06-18 | 21:04 ET | [8-K](/filings/0001899287-25-000041.md) | 5.07 Shareholder vote results | 0001899287-25-000041 |
| 2025-05-08 | 21:13 ET | [10-Q](/filings/0001899287-25-000040.md) | Quarterly report, period 2025-03-31 | 0001899287-25-000040 |
| 2025-05-08 | 20:09 ET | [8-K](/filings/0001899287-25-000038.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001899287-25-000038 |
| 2025-04-25 | 20:07 ET | [DEF 14A](/filings/0001899287-25-000026.md) | Proxy statement, period 2025-06-12 | 0001899287-25-000026 |
| 2025-04-23 | 12:40 ET | [8-K](/filings/0001899287-25-000020.md) | 5.02 Departure or appointment of officers or directors | 0001899287-25-000020 |
| 2025-03-20 | 21:01 ET | [10-K](/filings/0001899287-25-000012.md) | Annual report, period 2024-12-31 | 0001899287-25-000012 |
| 2025-03-20 | 20:08 ET | [8-K](/filings/0001899287-25-000010.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001899287-25-000010 |
| 2025-03-04 | 21:26 ET | [8-K](/filings/0001899287-25-000002.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001899287-25-000002 |
| 2024-11-07 | 22:06 ET | [10-Q](/filings/0001899287-24-000088.md) | Quarterly report, period 2024-09-30 | 0001899287-24-000088 |
| 2024-11-07 | 21:10 ET | [8-K](/filings/0001899287-24-000085.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001899287-24-000085 |
| 2024-11-05 | 00:24 ET | [8-K](/filings/0001899287-24-000078.md) | 8.01 Other events | 0001899287-24-000078 |
| 2024-10-29 | 12:40 ET | [8-K](/filings/0001899287-24-000077.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001899287-24-000077 |
| 2024-10-28 | 21:12 ET | [SC 13D](/filings/0001193125-24-245674.md) | Ownership report, active investor | 0001193125-24-245674 |
| 2024-10-25 | 23:25 ET | [SC 13D/A](/filings/0001193125-24-244399.md) | Ownership report, active investor, amended | 0001193125-24-244399 |
| 2024-10-25 | 23:04 ET | [SC 13D](/filings/0001193125-24-244385.md) | Ownership report, active investor | 0001193125-24-244385 |
| 2024-10-23 | 20:24 ET | [8-K](/filings/0001899287-24-000076.md) | 5.01 Change in control; 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001899287-24-000076 |
| 2024-09-20 | 21:04 ET | [8-K](/filings/0001899287-24-000075.md) | 3.01 Delisting notice | 0001899287-24-000075 |
| 2024-09-12 | 20:06 ET | [8-K](/filings/0001899287-24-000073.md) | 5.02 Departure or appointment of officers or directors | 0001899287-24-000073 |
| 2024-08-14 | 21:23 ET | [8-K](/filings/0001899287-24-000069.md) | 5.02 Departure or appointment of officers or directors | 0001899287-24-000069 |
| 2024-08-09 | 20:12 ET | [10-Q](/filings/0001899287-24-000065.md) | Quarterly report, period 2024-06-30 | 0001899287-24-000065 |
| 2024-08-08 | 20:09 ET | [8-K](/filings/0001899287-24-000062.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001899287-24-000062 |
| 2024-06-06 | 21:01 ET | [8-K](/filings/0001899287-24-000054.md) | 5.07 Shareholder vote results | 0001899287-24-000054 |
| 2024-05-14 | 23:08 ET | [8-K](/filings/0001899287-24-000052.md) | 3.03 Change to security holders’ rights; 8.01 Other events; 9.01 Financial statements and exhibits | 0001899287-24-000052 |
| 2024-05-09 | 21:07 ET | [10-Q](/filings/0001899287-24-000048.md) | Quarterly report, period 2024-03-31 | 0001899287-24-000048 |
| 2024-05-09 | 20:08 ET | [8-K](/filings/0001899287-24-000045.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001899287-24-000045 |
| 2024-04-25 | 20:06 ET | [DEF 14A](/filings/0001899287-24-000029.md) | Proxy statement, period 2024-06-06 | 0001899287-24-000029 |
| 2024-04-01 | 20:21 ET | [8-K](/filings/0001899287-24-000021.md) | 8.01 Other events | 0001899287-24-000021 |
| 2024-03-28 | 20:11 ET | [10-K](/filings/0001899287-24-000016.md) | Annual report, period 2023-12-31 | 0001899287-24-000016 |

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Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 24, 2026, 15:16 ET. No prices; not investment advice.