# Ultra Clean Holdings, Inc.: filings

UCTT · Nasdaq · CIK 1275014 · [Technology](/sectors/technology.md) · fiscal year ends Dec 30

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

## Reports and events: 282 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 (4 799, 8-K 174, SC 13G/A 68, 10-Q 53, 144 39, 3 36, 10-K 18, DEF 14A 18, SC 13G 16, SD 13, UPLOAD 13, CORRESP 10, 8-K/A 8, S-8 8, SCHEDULE 13G/A 8, 10-Q/A 7, SCHEDULE 13G 6, 424B5 5, ARS 5, 4/A 4, DEFA14A 4, EFFECT 4, NT 10-K 4, S-3ASR 3, 424B3 2, POS AM 2, S-1/A 2, S-3 2, S-3/A 2, 10-K/A 1, 3/A 1, NT 10-Q 1, RW 1, S-1 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-09-30 | 16:14 ET | [8-K](/filings/0001628280-26-063977.md) | 5.02 Departure or appointment of officers or directors | 0001628280-26-063977 |
| 2026-08-14 | 08:54 ET | [8-K](/filings/0000950103-26-012379.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0000950103-26-012379 |
| 2026-08-06 | 16:26 ET | [8-K](/filings/0001628280-26-054369.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001628280-26-054369 |
| 2026-08-04 | 16:06 ET | [10-Q](/filings/0001628280-26-052540.md) | Quarterly report, period 2026-06-26 | 0001628280-26-052540 |
| 2026-08-03 | 16:14 ET | [8-K](/filings/0001628280-26-051853.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-051853 |
| 2026-07-08 | 16:09 ET | [8-K](/filings/0001628280-26-047655.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001628280-26-047655 |
| 2026-05-26 | 17:05 ET | [8-K](/filings/0001628280-26-038205.md) | 5.07 Shareholder vote results | 0001628280-26-038205 |
| 2026-05-01 | 16:58 ET | [10-Q/A](/filings/0001628280-26-029413.md) | Quarterly report, amended, period 2026-03-27 | 0001628280-26-029413 |
| 2026-04-29 | 16:06 ET | [10-Q](/filings/0001628280-26-028365.md) | Quarterly report, period 2026-03-27 | 0001628280-26-028365 |
| 2026-04-28 | 17:28 ET | [8-K](/filings/0001628280-26-028020.md) | 9.01 Financial statements and exhibits | 0001628280-26-028020 |
| 2026-04-28 | 16:21 ET | [8-K](/filings/0001628280-26-027952.md) | 9.01 Financial statements and exhibits | 0001628280-26-027952 |
| 2026-04-27 | 06:05 ET | [DEF 14A](/filings/0001140361-26-016813.md) | Proxy statement, period 2026-05-22 | 0001140361-26-016813 |
| 2026-04-24 | 16:10 ET | [8-K](/filings/0000950103-26-006157.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0000950103-26-006157 |
| 2026-03-03 | 16:20 ET | [8-K](/filings/0000950103-26-003139.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 3.02 Unregistered sale of equity; 9.01 Financial statements and exhibits | 0000950103-26-003139 |
| 2026-02-27 | 06:06 ET | [8-K](/filings/0000950103-26-002821.md) | 1.01 Entry into a material agreement; 8.01 Other events; 9.01 Financial statements and exhibits | 0000950103-26-002821 |
| 2026-02-25 | 16:30 ET | [8-K](/filings/0000950103-26-002636.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0000950103-26-002636 |
| 2026-02-23 | 17:26 ET | [10-K](/filings/0001628280-26-010744.md) | Annual report, period 2025-12-26 | 0001628280-26-010744 |
| 2026-02-23 | 16:09 ET | [8-K](/filings/0001628280-26-010607.md) | 9.01 Financial statements and exhibits | 0001628280-26-010607 |
| 2026-01-28 | 07:36 ET | [8-K](/filings/0001628280-26-003715.md) | 5.02 Departure or appointment of officers or directors | 0001628280-26-003715 |
| 2025-10-29 | 16:12 ET | [10-Q](/filings/0001628280-25-047117.md) | Quarterly report, period 2025-09-26 | 0001628280-25-047117 |
| 2025-10-28 | 16:43 ET | [8-K](/filings/0001628280-25-046810.md) | 2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits | 0001628280-25-046810 |
| 2025-09-16 | 16:08 ET | [8-K](/filings/0001275014-25-000007.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001275014-25-000007 |
| 2025-08-07 | 06:13 ET | [8-K](/filings/0001628280-25-038545.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001628280-25-038545 |
| 2025-07-29 | 16:05 ET | [10-Q](/filings/0001628280-25-036413.md) | Quarterly report, period 2025-06-27 | 0001628280-25-036413 |
| 2025-07-28 | 16:10 ET | [8-K](/filings/0001628280-25-036187.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-25-036187 |
| 2025-06-30 | 16:09 ET | [8-K](/filings/0001628280-25-033496.md) | 5.02 Departure or appointment of officers or directors | 0001628280-25-033496 |
| 2025-05-27 | 16:31 ET | [8-K](/filings/0001628280-25-027946.md) | 5.07 Shareholder vote results | 0001628280-25-027946 |
| 2025-04-29 | 16:06 ET | [10-Q](/filings/0001628280-25-020658.md) | Quarterly report, period 2025-03-28 | 0001628280-25-020658 |
| 2025-04-28 | 16:18 ET | [8-K](/filings/0001628280-25-020279.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-25-020279 |
| 2025-04-28 | 16:05 ET | [DEF 14A](/filings/0001140361-25-016015.md) | Proxy statement, period 2025-05-21 | 0001140361-25-016015 |
| 2025-03-05 | 16:08 ET | [8-K](/filings/0001628280-25-010414.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001628280-25-010414 |
| 2025-02-25 | 17:28 ET | [10-K](/filings/0001628280-25-007865.md) | Annual report, period 2024-12-27 | 0001628280-25-007865 |
| 2025-02-24 | 16:16 ET | [8-K](/filings/0001628280-25-007372.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-25-007372 |
| 2025-02-11 | 19:22 ET | [10-Q/A](/filings/0001628280-25-004714.md) | Quarterly report, amended, period 2024-09-27 | 0001628280-25-004714 |
| 2025-02-11 | 18:55 ET | [10-Q/A](/filings/0001628280-25-004711.md) | Quarterly report, amended, period 2024-03-29 | 0001628280-25-004711 |
| 2025-01-31 | 18:25 ET | [8-K](/filings/0001628280-25-003224.md) | 5.02 Departure or appointment of officers or directors | 0001628280-25-003224 |
| 2024-10-30 | 18:04 ET | [10-Q](/filings/0001628280-24-044152.md) | Quarterly report, period 2024-09-27 | 0001628280-24-044152 |
| 2024-10-28 | 16:13 ET | [8-K](/filings/0001628280-24-043944.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-24-043944 |
| 2024-10-10 | 17:07 ET | [8-K](/filings/0001628280-24-042674.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001628280-24-042674 |
| 2024-07-26 | 16:12 ET | [10-Q](/filings/0001628280-24-033152.md) | Quarterly report, period 2024-06-28 | 0001628280-24-033152 |
| 2024-07-25 | 16:26 ET | [8-K](/filings/0001628280-24-032998.md) | 9.01 Financial statements and exhibits | 0001628280-24-032998 |
| 2024-05-28 | 16:45 ET | [8-K](/filings/0001628280-24-025440.md) | 5.07 Shareholder vote results | 0001628280-24-025440 |
| 2024-05-15 | 08:42 ET | [8-K](/filings/0001628280-24-023394.md) | 5.02 Departure or appointment of officers or directors | 0001628280-24-023394 |
| 2024-05-06 | 16:36 ET | [10-Q](/filings/0001628280-24-020679.md) | Quarterly report, period 2024-03-29 | 0001628280-24-020679 |
| 2024-05-06 | 16:17 ET | [8-K](/filings/0001628280-24-020638.md) | 9.01 Financial statements and exhibits | 0001628280-24-020638 |
| 2024-04-26 | 17:22 ET | [DEF 14A](/filings/0001140361-24-022572.md) | Proxy statement, period 2024-05-22 | 0001140361-24-022572 |
| 2024-04-09 | 20:56 ET | [8-K](/filings/0000950103-24-005020.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0000950103-24-005020 |
| 2024-03-08 | 16:20 ET | [8-K](/filings/0001628280-24-009984.md) | 4.01 Change of auditor | 0001628280-24-009984 |
| 2024-03-06 | 16:33 ET | [10-K](/filings/0000950170-24-027213.md) | Annual report, period 2023-12-29 | 0000950170-24-027213 |
| 2024-02-21 | 16:26 ET | [8-K](/filings/0000950170-24-017963.md) | 9.01 Financial statements and exhibits | 0000950170-24-017963 |

Page 1 of 6. [Older](/companies/uctt/filings.md?page=2)
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 27, 2026, 16:08 ET. No prices; not investment advice.