SEC Form 4 · Updated Daily
MG
— MISTRAS GROUP, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Vahaviolos Sotirios J. | 10%+ Owner · Director | 10,352,803 | 2019-12-23 | G |
| Foglia Stephanie Athena | 10%+ Owner | 3,923,718 | 2026-09-10 | G |
| 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos | 10%+ Owner | 3,923,718 | 2026-09-10 | G |
| Vahaviolos Aspasia Felice | 10%+ Owner | 2,160,790 | 2026-09-10 | G |
| Burgess Elizabeth | Director | 965,594 | 2010-04-20 | P |
| Stamatakis Manuel N. | Director · Officer | 509,795 | 2026-03-04 | F |
| Bertolotti Dennis | Director · Officer | 424,358 | 2023-03-30 | F |
| DEBENEDICTIS NICHOLAS | Director | 248,820 | 2026-05-19 | A |
| Lange Michael J. | Officer | 240,515 | 2024-09-25 | S |
| Wolk Jonathan H | Officer | 194,575 | 2023-01-03 | F |
| FORESE JAMES J | Director | 177,043 | 2026-05-19 | A |
| Carlos Mark F. | Officer | 163,293 | 2016-08-18 | F |
| Peterik Paul | Officer | 162,500 | 2010-04-01 | M |
| Cole Phillip T. | Officer | 160,950 | 2012-11-09 | S |
| Prajzner Edward J | Officer | 148,076 | 2026-03-22 | F |
| SHUMAN-FABBRI NATALIA | Director · Officer | 123,780 | 2026-09-08 | F |
| Smith John Anthony | Officer | 100,447 | 2024-04-03 | F |
| Lohmeier Michelle | Director | 99,223 | 2026-05-19 | A |
| Keefe Michael C | Officer | 92,587 | 2025-03-19 | F |
| PIZZI CHARLES P | Director | 73,480 | 2026-05-19 | A |
| GLANTON RICHARD H | Director | 68,431 | 2026-05-19 | A |
| Hammad Hanei Wail | Officer | 61,777 | 2026-03-26 | F |
| D'Alterio Gennaro A. | Officer | 46,577 | 2026-09-20 | F |
| WELDON WAYNE CURTIS | Director | 36,106 | 2020-08-25 | A |
| JOYCE FRANCIS T | Officer | 20,042 | 2013-08-14 | A |
| Orlando Philip | Officer | 18,182 | 2013-10-22 | A |
| Ruff Ellen T | Director | 14,165 | 2015-08-12 | A |
| Coggins Eileen Mary | Officer | 13,364 | 2026-09-18 | F |
| Genesi Ralph L. | Officer | 9,909 | 2015-05-20 | S |
| DICKINSON DANIEL M | Director | 9,407 | 2014-08-13 | A |
| Vogel Justin | Officer | 8,500 | 2013-09-04 | — |
| Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust | 10%+ Owner | 0 | 2025-07-02 | G |
| TC NDT Holdings, L.L.C. | 10%+ Owner | 0 | 2011-05-11 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-20 | D'Alterio Gennaro A. | Tax withholding | 662 | $20.75 | 46,577 |
| 2026-09-18 | Coggins Eileen Mary | Tax withholding | 1,636 | $19.66 | 13,364 |
| 2026-09-10 | Vahaviolos Aspasia Felice | Gift | 387,093 | $0.00 | 2,160,790 |
| 2026-09-10 | 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos | Gift | 387,093 | $0.00 | 3,923,718 |
| 2026-09-10 | Foglia Stephanie Athena | Gift | 387,093 | $0.00 | 3,923,718 |
| 2026-09-10 | Vahaviolos Aspasia Felice | Gift | 387,093 | $0.00 | 2,154,541 |
| 2026-09-08 | SHUMAN-FABBRI NATALIA | Tax withholding | 2,410 | $19.42 | 123,780 |
| 2026-06-10 | Vahaviolos Aspasia Felice | Gift | 411,875 | $0.00 | 1,794,839 |
| 2026-06-10 | 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos | Gift | 411,875 | $0.00 | 4,310,811 |
| 2026-06-10 | Foglia Stephanie Athena | Gift | 411,875 | $0.00 | 4,310,811 |
| 2026-05-19 | PIZZI CHARLES P | Grant / award | 6,862 | $0.00 | 73,480 |
| 2026-05-19 | Lohmeier Michelle | Grant / award | 6,862 | $0.00 | 99,223 |
| 2026-05-19 | FORESE JAMES J | Grant / award | 6,862 | $0.00 | 177,043 |
| 2026-05-19 | GLANTON RICHARD H | Grant / award | 6,862 | $0.00 | 68,431 |
| 2026-05-19 | DEBENEDICTIS NICHOLAS | Grant / award | 6,862 | $0.00 | 248,820 |
| 2026-04-27 | 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos | Gift | 528,672 | $0.00 | 4,722,686 |
| 2026-04-27 | Foglia Stephanie Athena | Gift | 528,672 | $0.00 | 4,722,686 |
| 2026-04-17 | 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos | Open-market sale | 1,000 | $18.00 | 1,692 |
| 2026-04-17 | Foglia Stephanie Athena | Open-market sale | 1,000 | $18.00 | 1,692 |
| 2026-03-26 | Hammad Hanei Wail | Tax withholding | 2,865 | $15.10 | 61,777 |
| 2026-03-22 | Prajzner Edward J | Tax withholding | 1,367 | $14.05 | 148,076 |
| 2026-03-16 | Prajzner Edward J | Tax withholding | 2,239 | $14.61 | 149,443 |
| 2026-03-07 | Prajzner Edward J | Tax withholding | 2,540 | $14.82 | 151,682 |
| 2026-03-04 | D'Alterio Gennaro A. | Tax withholding | 184 | $15.68 | 47,239 |
| 2026-03-04 | Prajzner Edward J | Tax withholding | 698 | $15.68 | 154,222 |
| 2026-03-04 | Hammad Hanei Wail | Tax withholding | 337 | $15.68 | 64,642 |
| 2026-03-04 | Stamatakis Manuel N. | Tax withholding | 814 | $15.68 | 509,795 |
| 2026-03-03 | 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos | Open-market sale | 1,000 | $15.50 | 2,692 |
| 2026-03-03 | Foglia Stephanie Athena | Open-market sale | 1,000 | $15.50 | 2,692 |
| 2026-02-28 | D'Alterio Gennaro A. | Tax withholding | 862 | $15.28 | 47,423 |
| 2026-02-28 | D'Alterio Gennaro A. | Tax withholding | 655 | $15.28 | 48,285 |
| 2026-02-28 | Prajzner Edward J | Tax withholding | 1,303 | $15.28 | 154,920 |
| 2026-02-25 | D'Alterio Gennaro A. | Grant / award | 19,905 | $0.00 | 48,940 |
| 2026-02-25 | Coggins Eileen Mary | Grant / award | 7,242 | $0.00 | 22,242 |
| 2026-02-25 | Hammad Hanei Wail | Grant / award | 29,762 | $0.00 | 88,357 |
| 2026-02-25 | Prajzner Edward J | Grant / award | 37,202 | $0.00 | 156,223 |
| 2026-02-25 | Stamatakis Manuel N. | Grant / award | 86,310 | $0.00 | 510,609 |
| 2026-02-25 | SHUMAN-FABBRI NATALIA | Grant / award | 101,190 | $0.00 | 126,190 |
| 2026-02-25 | Hammad Hanei Wail | Grant / award | 29,762 | $0.00 | 88,357 |
| 2026-02-03 | 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos | Open-market sale | 1,000 | $14.60 | 3,692 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.