# Mistras Group, Inc.: filings

MG · NYSE · CIK 1436126 · [Industrials](/sectors/industrials.md) · fiscal year ends Dec 31

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

## Reports and events: 252 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 (4 619, 8-K 145, 10-Q 52, SC 13G/A 39, 3 33, 4/A 20, DEFA14A 20, DEF 14A 17, 10-K 16, UPLOAD 16, SC 13G 15, SD 13, ARS 10, CORRESP 10, SCHEDULE 13D/A 8, 144 7, 5 7, S-8 6, SCHEDULE 13G 5, 8-K/A 4, S-1/A 4, 3/A 3, SC 13D 3, 424B5 2, EFFECT 2, SCHEDULE 13G/A 2, 10-K/A 1, 10-KT 1, 424B4 1, 5/A 1, 8-A12B 1, ARS/A 1, CERTNYS 1, NT 10-K 1, NT 10-Q 1, PRE 14A 1, PREM14A 1, S-3 1, S-3/A 1, SC 13D/A 1, SCHEDULE 13D 1, SD/A 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-07 | 16:05 ET | [SCHEDULE 13D/A](/filings/0001104659-26-114355.md) | Ownership report, active investor, amended | 0001104659-26-114355 |
| 2026-09-21 | 16:05 ET | [SCHEDULE 13D/A](/filings/0001104659-26-109294.md) | Ownership report, active investor, amended | 0001104659-26-109294 |
| 2026-09-18 | 17:22 ET | [SCHEDULE 13D/A](/filings/0001193125-26-395732.md) | Ownership report, active investor, amended | 0001193125-26-395732 |
| 2026-09-18 | 16:05 ET | [8-K](/filings/0001140361-26-037107.md) | 1.01 Entry into a material agreement; 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001140361-26-037107 |
| 2026-09-14 | 21:28 ET | [SCHEDULE 13D/A](/filings/0002082289-26-000012.md) | Ownership report, active investor, amended | 0002082289-26-000012 |
| 2026-08-10 | 17:16 ET | [10-Q](/filings/0001628280-26-055351.md) | Quarterly report, period 2026-06-30 | 0001628280-26-055351 |
| 2026-08-10 | 17:10 ET | [8-K](/filings/0001628280-26-055344.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-055344 |
| 2026-06-12 | 19:15 ET | [SCHEDULE 13D/A](/filings/0001104659-26-073638.md) | Ownership report, active investor, amended | 0001104659-26-073638 |
| 2026-06-04 | 16:12 ET | [SCHEDULE 13D/A](/filings/0000897101-26-000203.md) | Ownership report, active investor, amended | 0000897101-26-000203 |
| 2026-05-20 | 16:30 ET | [8-K](/filings/0001628280-26-036918.md) | 5.07 Shareholder vote results | 0001628280-26-036918 |
| 2026-05-07 | 14:52 ET | [10-Q](/filings/0001628280-26-031968.md) | Quarterly report, period 2026-03-31 | 0001628280-26-031968 |
| 2026-05-05 | 17:17 ET | [8-K](/filings/0001628280-26-030733.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-030733 |
| 2026-04-23 | 20:00 ET | [SCHEDULE 13D/A](/filings/0001193125-26-174325.md) | Ownership report, active investor, amended | 0001193125-26-174325 |
| 2026-04-07 | 17:24 ET | [DEF 14A](/filings/0001140361-26-013689.md) | Proxy statement, period 2026-05-19 | 0001140361-26-013689 |
| 2026-03-31 | 16:12 ET | [SCHEDULE 13D](/filings/0000897101-26-000112.md) | Ownership report, active investor | 0000897101-26-000112 |
| 2026-03-11 | 14:36 ET | [10-K](/filings/0001628280-26-016765.md) | Annual report, period 2025-12-31 | 0001628280-26-016765 |
| 2026-03-04 | 16:35 ET | [8-K](/filings/0001628280-26-014662.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-014662 |
| 2025-11-06 | 14:28 ET | [10-Q](/filings/0001628280-25-050063.md) | Quarterly report, period 2025-09-30 | 0001628280-25-050063 |
| 2025-11-04 | 17:02 ET | [8-K](/filings/0001436126-25-000093.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001436126-25-000093 |
| 2025-09-10 | 16:01 ET | [8-K](/filings/0001436126-25-000074.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001436126-25-000074 |
| 2025-08-11 | 15:13 ET | [10-Q](/filings/0001436126-25-000068.md) | Quarterly report, period 2025-06-30 | 0001436126-25-000068 |
| 2025-08-06 | 16:51 ET | [8-K](/filings/0001436126-25-000063.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001436126-25-000063 |
| 2025-05-23 | 10:58 ET | [8-K](/filings/0001436126-25-000039.md) | 5.07 Shareholder vote results | 0001436126-25-000039 |
| 2025-05-09 | 15:53 ET | [10-Q](/filings/0001436126-25-000034.md) | Quarterly report, period 2025-03-31 | 0001436126-25-000034 |
| 2025-05-08 | 18:00 ET | [8-K](/filings/0001436126-25-000031.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001436126-25-000031 |
| 2025-04-09 | 16:15 ET | [DEF 14A](/filings/0001140361-25-013050.md) | Proxy statement, period 2025-05-19 | 0001140361-25-013050 |
| 2025-03-11 | 16:52 ET | [10-K](/filings/0001436126-25-000026.md) | Annual report, period 2024-12-31 | 0001436126-25-000026 |
| 2025-03-10 | 20:08 ET | [SCHEDULE 13D/A](/filings/0000950170-25-036701.md) | Ownership report, active investor, amended | 0000950170-25-036701 |
| 2025-03-05 | 16:25 ET | [8-K](/filings/0001436126-25-000021.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001436126-25-000021 |
| 2025-02-13 | 09:11 ET | [8-K](/filings/0001436126-25-000016.md) | 5.02 Departure or appointment of officers or directors | 0001436126-25-000016 |
| 2025-02-07 | 16:07 ET | [8-K](/filings/0001436126-25-000013.md) | 7.01 Regulation FD disclosure | 0001436126-25-000013 |
| 2025-01-02 | 16:07 ET | [8-K](/filings/0001436126-25-000010.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001436126-25-000010 |
| 2025-01-02 | 16:04 ET | [8-K/A](/filings/0001436126-25-000008.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001436126-25-000008 |
| 2024-12-16 | 16:14 ET | [8-K](/filings/0001436126-24-000074.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001436126-24-000074 |
| 2024-12-05 | 17:22 ET | [8-K](/filings/0001436126-24-000071.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001436126-24-000071 |
| 2024-11-04 | 14:02 ET | [10-Q](/filings/0001436126-24-000065.md) | Quarterly report, period 2024-09-30 | 0001436126-24-000065 |
| 2024-10-30 | 16:26 ET | [8-K](/filings/0001436126-24-000062.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001436126-24-000062 |
| 2024-10-30 | 16:01 ET | [8-K](/filings/0001436126-24-000060.md) | 1.02 Termination of a material agreement; 9.01 Financial statements and exhibits | 0001436126-24-000060 |
| 2024-09-18 | 16:05 ET | [8-K](/filings/0001436126-24-000055.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001436126-24-000055 |
| 2024-08-02 | 14:49 ET | [10-Q](/filings/0001436126-24-000052.md) | Quarterly report, period 2024-06-30 | 0001436126-24-000052 |
| 2024-07-31 | 16:04 ET | [8-K](/filings/0001436126-24-000046.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001436126-24-000046 |
| 2024-07-09 | 20:07 ET | [SC 13D](/filings/0001193125-24-176872.md) | Ownership report, active investor | 0001193125-24-176872 |
| 2024-05-20 | 14:46 ET | [8-K](/filings/0001436126-24-000037.md) | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results | 0001436126-24-000037 |
| 2024-05-03 | 14:44 ET | [10-Q](/filings/0001436126-24-000035.md) | Quarterly report, period 2024-03-31 | 0001436126-24-000035 |
| 2024-05-01 | 16:04 ET | [8-K](/filings/0001436126-24-000029.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001436126-24-000029 |
| 2024-04-04 | 16:01 ET | [DEF 14A](/filings/0001140361-24-017926.md) | Proxy statement, period 2024-05-14 | 0001140361-24-017926 |
| 2024-03-11 | 16:40 ET | [10-K](/filings/0001436126-24-000025.md) | Annual report, period 2023-12-31 | 0001436126-24-000025 |
| 2024-03-06 | 16:02 ET | [8-K](/filings/0001436126-24-000018.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001436126-24-000018 |
| 2024-03-01 | 16:15 ET | [8-K](/filings/0001436126-24-000013.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001436126-24-000013 |
| 2024-02-14 | 14:58 ET | [SC 13D/A](/filings/0001436126-24-000007.md) | Ownership report, active investor, amended | 0001436126-24-000007 |

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Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 27, 2026, 08:43 ET. No prices; not investment advice.