# MKS Inc: filings

MKSI · Nasdaq · CIK 1049502 · [Technology](/sectors/technology.md) · fiscal year ends Dec 31

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

## Reports and events: 269 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 (4 962, 8-K 175, SC 13G/A 77, 144 76, 10-Q 53, 3 28, 4/A 21, CT ORDER 20, 10-K 18, DEF 14A 18, 5 14, SD 13, DEFA14A 12, UPLOAD 12, ARS 11, SC 13G 11, CORRESP 10, SCHEDULE 13G/A 10, DFAN14A 7, S-8 6, 8-K/A 5, SC TO-I/A 5, 425 4, SCHEDULE 13G 3, 424B7 2, 5/A 2, PRE 14A 2, EFFECT 1, NT 10-K 1, POS AM 1, S-3ASR 1, SC TO-I 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-19 | 12:17 ET | [8-K](/filings/0001193125-26-424709.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-424709 |
| 2026-08-06 | 19:30 ET | [10-Q](/filings/0001193125-26-337821.md) | Quarterly report, period 2026-06-30 | 0001193125-26-337821 |
| 2026-08-05 | 20:31 ET | [8-K](/filings/0001193125-26-335274.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-26-335274 |
| 2026-05-12 | 20:15 ET | [8-K](/filings/0001193125-26-219474.md) | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001193125-26-219474 |
| 2026-05-07 | 19:30 ET | [10-Q](/filings/0001049502-26-000062.md) | Quarterly report, period 2026-03-31 | 0001049502-26-000062 |
| 2026-05-06 | 20:31 ET | [8-K](/filings/0001193125-26-209140.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-26-209140 |
| 2026-04-06 | 12:29 ET | [8-K](/filings/0001193125-26-142945.md) | 5.02 Departure or appointment of officers or directors | 0001193125-26-142945 |
| 2026-03-31 | 12:34 ET | [DEF 14A](/filings/0001193125-26-133378.md) | Proxy statement, period 2026-05-11 | 0001193125-26-133378 |
| 2026-02-24 | 20:31 ET | [10-K](/filings/0001193125-26-066820.md) | Annual report, period 2025-12-31 | 0001193125-26-066820 |
| 2026-02-17 | 21:31 ET | [8-K](/filings/0001193125-26-054841.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-26-054841 |
| 2026-02-05 | 13:39 ET | [8-K](/filings/0001193125-26-038565.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-26-038565 |
| 2026-01-28 | 21:15 ET | [8-K](/filings/0001193125-26-027243.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-027243 |
| 2026-01-21 | 15:30 ET | [8-K](/filings/0001193125-26-017468.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-26-017468 |
| 2025-11-06 | 19:01 ET | [10-Q](/filings/0001193125-25-268932.md) | Quarterly report, period 2025-09-30 | 0001193125-25-268932 |
| 2025-11-05 | 21:31 ET | [8-K](/filings/0001193125-25-267070.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-25-267070 |
| 2025-08-07 | 13:45 ET | [10-Q](/filings/0001193125-25-175092.md) | Quarterly report, period 2025-06-30 | 0001193125-25-175092 |
| 2025-08-06 | 20:31 ET | [8-K](/filings/0000950170-25-104141.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-25-104141 |
| 2025-05-15 | 13:03 ET | [8-K](/filings/0000950170-25-072053.md) | 3.03 Change to security holders’ rights; 5.02 Departure or appointment of officers or directors; 5.03 Amendment to articles or bylaws; 5.07 Shareholder vote results; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000950170-25-072053 |
| 2025-05-08 | 19:05 ET | [10-Q](/filings/0000950170-25-066792.md) | Quarterly report, period 2025-03-31 | 0000950170-25-066792 |
| 2025-05-07 | 20:31 ET | [8-K](/filings/0000950170-25-065768.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-25-065768 |
| 2025-04-01 | 12:31 ET | [DEF 14A](/filings/0001193125-25-069811.md) | Proxy statement, period 2025-05-12 | 0001193125-25-069811 |
| 2025-02-25 | 19:30 ET | [10-K](/filings/0000950170-25-026433.md) | Annual report, period 2024-12-31 | 0000950170-25-026433 |
| 2025-02-12 | 21:31 ET | [8-K](/filings/0000950170-25-018919.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-25-018919 |
| 2025-01-24 | 14:05 ET | [8-K](/filings/0001193125-25-011839.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-25-011839 |
| 2024-12-03 | 14:05 ET | [8-K](/filings/0001193125-24-269480.md) | 5.03 Amendment to articles or bylaws; 9.01 Financial statements and exhibits | 0001193125-24-269480 |
| 2024-11-07 | 21:21 ET | [10-Q](/filings/0000950170-24-123394.md) | Quarterly report, period 2024-09-30 | 0000950170-24-123394 |
| 2024-11-06 | 21:31 ET | [8-K](/filings/0000950170-24-122391.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-24-122391 |
| 2024-11-05 | 14:14 ET | [8-K](/filings/0001193125-24-251012.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-24-251012 |
| 2024-08-13 | 13:07 ET | [8-K](/filings/0001193125-24-199463.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-24-199463 |
| 2024-08-08 | 17:00 ET | [10-Q](/filings/0000950170-24-093615.md) | Quarterly report, period 2024-06-30 | 0000950170-24-093615 |
| 2024-08-07 | 20:31 ET | [8-K](/filings/0000950170-24-092873.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-24-092873 |
| 2024-07-23 | 13:07 ET | [8-K](/filings/0001193125-24-182623.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-24-182623 |
| 2024-06-20 | 12:00 ET | [8-K](/filings/0000950170-24-075318.md) | 7.01 Regulation FD disclosure | 0000950170-24-075318 |
| 2024-05-16 | 20:21 ET | [8-K](/filings/0001193125-24-140592.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 | 0001193125-24-140592 |
| 2024-05-14 | 10:30 ET | [8-K](/filings/0001193125-24-137689.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-24-137689 |
| 2024-05-13 | 10:48 ET | [8-K](/filings/0001193125-24-136673.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-24-136673 |
| 2024-05-09 | 20:46 ET | [10-Q](/filings/0000950170-24-057181.md) | Quarterly report, period 2024-03-31 | 0000950170-24-057181 |
| 2024-05-08 | 20:31 ET | [8-K](/filings/0000950170-24-055783.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-24-055783 |
| 2024-05-08 | 20:20 ET | [8-K](/filings/0001193125-24-134237.md) | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001193125-24-134237 |
| 2024-04-01 | 20:19 ET | [8-K](/filings/0001193125-24-083409.md) | 5.02 Departure or appointment of officers or directors | 0001193125-24-083409 |
| 2024-03-27 | 20:45 ET | [DEF 14A](/filings/0001193125-24-078875.md) | Proxy statement, period 2024-05-07 | 0001193125-24-078875 |
| 2024-02-27 | 21:01 ET | [10-K](/filings/0000950170-24-021071.md) | Annual report, period 2023-12-31 | 0000950170-24-021071 |
| 2024-02-14 | 23:53 ET | [8-K](/filings/0001193125-24-034098.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001193125-24-034098 |
| 2024-02-08 | 21:35 ET | [8-K](/filings/0001193125-24-028405.md) | 5.02 Departure or appointment of officers or directors | 0001193125-24-028405 |
| 2024-02-07 | 21:31 ET | [8-K](/filings/0000950170-24-012251.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-24-012251 |
| 2024-01-22 | 21:15 ET | [8-K](/filings/0001193125-24-012171.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-24-012171 |
| 2023-12-04 | 12:15 ET | [8-K](/filings/0001193125-23-287943.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-23-287943 |
| 2023-11-08 | 20:39 ET | [10-Q](/filings/0000950170-23-061045.md) | Quarterly report, period 2023-09-30 | 0000950170-23-061045 |
| 2023-11-01 | 20:31 ET | [8-K](/filings/0000950170-23-057509.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-23-057509 |
| 2023-10-03 | 20:30 ET | [8-K](/filings/0001193125-23-249956.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-23-249956 |

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Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 24, 2026, 15:03 ET. No prices; not investment advice.