Mistras MG Insider Ownership

NYSE MG
$21.35 -0.24 (-1.11%)
As of: Sep 29, 2026 · 3:59 PM EDT

Insider Holdings by Owner

12.59Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
39.56%
▼-0.124% pp QoQ
Shares Held by Insiders
12.59Mn
filed for Sep 2026
▼-0.31% QoQ
Shares Outstanding
31.83Mn
31,831,000 shares
Direct Holdings
8.67Mn
Indirect: 3.93Mn
Net Shares Traded (QoQ)
-39.34K
net selling in Sep 2026
Insiders Holding Shares
19
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

As of September 29, 2026, the three largest insider holders of MG are Stephanie Athena Foglia (TenPercentOwner, 3.92Mn shares), Sotirios J. Vahaviolos (Executive Chairman, 3.89Mn shares), Aspasia Felice Vahaviolos (TenPercentOwner, 2.15Mn shares).

Form 4 Holdings

Insiders Holding MG

Insiders 19
Shares held 12.59Mn
Of outstanding 39.56%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Stephanie Athena Foglia TenPercentOwner 0 3,923,718 3,923,718 31.2% 14 Sep, 2026
2 Sotirios J. Vahaviolos Executive Chairman 3,890,699 0 3,890,699 30.9% 03 May, 2024
3 Aspasia Felice Vahaviolos TenPercentOwner 2,154,541 0 2,154,541 17.1% 14 Sep, 2026
4 Manuel N. Stamatakis Executive Chairman 509,795 0 509,795 4.0% 10 Mar, 2026
5 Dennis Bertolotti President And Ceo 424,358 0 424,358 3.4% 30 Mar, 2023
6 Nicholas Debenedictis Director 248,820 0 248,820 2.0% 21 May, 2026
7 Michael J. Lange Senior Evp 240,515 0 240,515 1.9% 25 Sep, 2024
8 Jonathan H Wolk Sr. Evp And Coo 194,575 0 194,575 1.5% 03 Jan, 2023
9 James J Forese Director 177,043 0 177,043 1.4% 21 May, 2026
10 Edward J Prajzner Sr. Evp And Cfo 148,076 0 148,076 1.2% 23 Mar, 2026
11 Natalia Shuman-Fabbri President And Ceo 123,780 0 123,780 1.0% 09 Sep, 2026
12 John Anthony Smith Executive Vice President 100,447 0 100,447 0.8% 05 Apr, 2024
13 Michelle Lohmeier Director 99,223 0 99,223 0.8% 21 May, 2026
14 Michael C Keefe Evp, General Counsel 91,558 0 91,558 0.7% 20 Mar, 2025
15 Charles P Pizzi Director 73,480 0 73,480 0.6% 20 May, 2026
16 Richard H Glanton Director 68,431 0 68,431 0.5% 21 May, 2026
17 Hanei Wail Hammad Evp Chief Operating Officer 61,777 0 61,777 0.5% 26 Mar, 2026
18 Gennaro A. D'Alterio Evp, Chief Commercial Officer 46,577 0 46,577 0.4% 22 Sep, 2026
19 Eileen Mary Coggins Chief Legal Officer 13,364 0 13,364 0.1% 18 Sep, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

850 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
20 Sep, 2026 Gennaro A. D'Alterio Evp, Chief Commercial Officer Disposed F 662 $20.75 $13.74K 46,577 Direct
18 Sep, 2026 Eileen Mary Coggins Chief Legal Officer Disposed F 1,636 $19.66 $32.16K 13,364 Direct
08 Sep, 2026 Natalia Shuman-Fabbri President And Ceo Disposed F 2,410 $19.42 $46.80K 123,780 Direct
10 Jun, 2026 Aspasia Felice Vahaviolos TenPercentOwner Acquired G 411,875 $0.00 $0 1,794,839 Direct
10 Jun, 2026 Stephanie Athena Foglia TenPercentOwner Disposed G 411,875 $0.00 $0 4,310,811 Indirect
19 May, 2026 Michelle Lohmeier Director Acquired A 6,862 $0.00 $0 99,223 Direct
19 May, 2026 Richard H Glanton Director Acquired A 6,862 $0.00 $0 68,431 Direct
19 May, 2026 Nicholas Debenedictis Director Acquired A 6,862 $0.00 $0 248,820 Direct
19 May, 2026 James J Forese Director Acquired A 6,862 $0.00 $0 177,043 Direct
19 May, 2026 Charles P Pizzi Director Acquired A 6,862 $0.00 $0 73,480 Direct
26 Mar, 2026 Hanei Wail Hammad Evp Chief Operating Officer Disposed F 2,865 $15.10 $43.26K 61,777 Direct
22 Mar, 2026 Edward J Prajzner Sr. Evp And Cfo Disposed F 1,367 $14.05 $19.21K 148,076 Direct
16 Mar, 2026 Edward J Prajzner Sr. Evp And Cfo Disposed F 2,239 $14.61 $32.71K 149,443 Direct
04 Mar, 2026 Hanei Wail Hammad Evp Chief Operating Officer Disposed F 337 $15.68 $5.28K 64,642 Direct
04 Mar, 2026 Gennaro A. D'Alterio Evp, Chief Commercial Officer Disposed F 184 $15.68 $2.89K 47,239 Direct
04 Mar, 2026 Edward J Prajzner Sr. Evp And Cfo Disposed F 698 $15.68 $10.94K 154,222 Direct
04 Mar, 2026 Manuel N. Stamatakis Executive Chairman Disposed F 814 $15.68 $12.76K 509,795 Direct
07 Mar, 2026 Edward J Prajzner Sr. Evp And Cfo Disposed F 2,540 $14.82 $37.64K 151,682 Direct
25 Feb, 2026 Natalia Shuman-Fabbri President And Ceo Acquired A 101,190 $0.00 $0 126,190 Direct
25 Feb, 2026 Eileen Mary Coggins Evp, General Counsel Acquired A 7,242 $0.00 $0 22,242 Direct